ZyXEL Communications OX253P WiMAX MIMO 2.5GHz Outdoor Simple CPE User Manual User s manual
ZyXEL Communications Corporation WiMAX MIMO 2.5GHz Outdoor Simple CPE User s manual
User Manual
About This User's Guide
OX253P User’s Guide 3
About This User's Guide
Intended Audience
This manual is intended for people who want to configure the OX253P using the
web configurator. You should have at least a basic knowledge of TCP/IP
networking concepts and topology.
Related Documentation
•Quick Start Guide
The Quick Start Guide is designed to help you get up and running right away. It
contains information on setting up your network and configuring for Internet
access.
•Web Configurator Online Help
Embedded web help for descriptions of individual screens and supplementary
information.
•Command Reference Guide
The Command Reference Guide explains how to use the Command-Line
Interface (CLI) and CLI commands to configure the OX253P.
Note: It is recommended you use the web configurator to configure the OX253P.
•Support Disc
Disclaimer
Graphics in this book may differ slightly from the product due to differences in
operating systems, operating system versions, or if you installed updated
firmware/software for your device. Every effort has been made to ensure that the
information in this manual is accurate.
Document Conventions
OX253P User’s Guide
4
Document Conventions
Warnings and Notes
These are how warnings and notes are shown in this User’s Guide.
Warnings tell you about things that could harm you or your
OX253P.
Note: Notes tell you other important information (for example, other things you may
need to configure or helpful tips) or recommendations.
Syntax Conventions
•The product(s) described in this book may be referred to as the “OX253P”, the
“device”, the “system” or the “product” in this User’s Guide.
•Product labels, screen names, field labels and field choices are all in bold font.
•A key stroke is denoted by square brackets and uppercase text, for example,
[ENTER] means the “enter” or “return” key on your keyboard.
•“Enter” means for you to type one or more characters and then press the
[ENTER] key. “Select” or “choose” means for you to use one of the predefined
choices.
•A right angle bracket ( > ) within a screen name denotes a mouse click. For
example, TOOLS > Logs > Log Settings means you first click Tools in the
navigation panel, then the Logs sub menu and finally the Log Settings tab to
get to that screen.
•Units of measurement may denote the “metric” value or the “scientific” value.
For example, “k” for kilo may denote “1000” or “1024”, “M” for mega may
denote “1000000” or “1048576” and so on.
•“e.g.,” is a shorthand for “for instance”, and “i.e.,” means “that is” or “in other
words”.
Document Conventions
OX253P User’s Guide 5
Icons Used in Figures
Figures in this User’s Guide may use the following generic icons. The OX253P icon
is not an exact representation of your OX253P.
Table 1 Common Icons
WiMAX Access PointComputerWireless Signal
NotebookServerWiMAX Base Station
TelephoneSwitchRouter
Internet CloudInternet/WiMAX
Cloud
Safety Warnings
OX253P User’s Guide
6
Safety Warnings
For your safety, be sure to read and follow all warning notices and
instructions.
•Do NOT use this product near water, for example, in a wet basement or near a
swimming pool.
•Do NOT expose your device to dampness, dust or corrosive liquids.
•Do NOT store things on the device.
•Do NOT install, use, or service this device during a thunderstorm. There is a
remote risk of electric shock from lightning.
•Connect ONLY suitable accessories to the device.
•Do NOT open the device or unit. Opening or removing covers can expose you to
dangerous high voltage points or other risks. ONLY qualified service personnel
should service or disassemble this device. Please contact your vendor for further
information.
•Make sure to connect the cables to the correct ports.
•Place connecting cables carefully so that no one will step on them or stumble
over them.
•Always disconnect all cables from this device before servicing or disassembling.
•Use ONLY an appropriate power adaptor or cord for your device. Connect it to
the right supply voltage (for example, 110V AC in North America or 230V AC in
Europe).
•Do NOT remove the plug and connect it to a power outlet by itself; always
attach the plug to the power adaptor first before connecting it to a power outlet.
•Do NOT allow anything to rest on the power adaptor or cord and do NOT place
the product where anyone can walk on the power adaptor or cord.
•Do NOT use the device if the power adaptor or cord is damaged as it might
cause electrocution.
•If the power adaptor or cord is damaged, remove it from the device and the
power source.
•Do NOT attempt to repair the power adaptor or cord. Contact your local vendor
to order a new one.Do not use the device outside, and make sure all the
connections are indoors. There is a remote risk of electric shock from lightning.
•Do NOT obstruct the device ventilation slots, as insufficient airflow may harm
your device.Use only No. 26 AWG (American Wire Gauge) or larger
telecommunication line cord.
•Antenna Warning! This device meets ETSI and FCC certification requirements
when using the included antenna(s). Only use the included antenna(s).
•If you wall mount your device, make sure that no electrical lines, gas or water
pipes will be damaged.
Safety Warnings
OX253P User’s Guide 7
•Make sure that the cable system is grounded so as to provide some protection
against voltage surges.
Your product is marked with this symbol, which is known as the WEEE mark. WEEE
stands for Waste Electronics and Electrical Equipment. It means that used electrical
and electronic products should not be mixed with general waste. Used electrical and
electronic equipment should be treated separately.
Safety Warnings
OX253P User s Guide
8
Federal
Communication
Commission
Interference
Statement
This equipment has been tested and found to comply with the limits for a C
lass
B
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed
t
o
provide reasonable protection against harmful interference in a r
esidential
installation. This equipment generates, uses and can radiate radio f
requency
energy and, if not installed and used in accordance with the instructions, may c
ause
harmful interference to radio communications. However, there is no guarantee t
hat
interference will not occur in a particular installation. If this equipment does c
ause
harmful interference to radio or television reception, which can be determined b
y
turning the equipment off and on, the user is encouraged to try to correct t
he
interference by one of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that
to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
FCC Caution: Any changes or modifications not expressly approved by the p
arty
responsible for compliance could void the user's authority to operate t
his
equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to t
he
following two conditions: (1) This device may not cause harmful interference, a
nd
(2) this device must accept any interference received, including interference t
hat
may cause undesired operation.
IMPORTANT NOTE:
FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for a
n
uncontrolled environment. This equipment should be installed and operated w
ith
minimum distance 20cm between the radiator & your body.
This transmitter must not be co-located or operating in conjunction with any other
antenna or transmitter.
Contents Overview
OX253P User’s Guide 9
Contents Overview
User’s Guide ...........................................................................................................................17
Getting Started ...........................................................................................................................19
Introducing the Web Configurator ..............................................................................................23
Internet Connection Wizard....................................................................................................... 29
Tutorials .....................................................................................................................................35
Technical Reference ..............................................................................................................45
The Setup Screens ....................................................................................................................47
The LAN Configuration Screens ................................................................................................53
The WAN Configuration Screens ...............................................................................................65
The NAT Configuration Screens ................................................................................................77
The System Configuration Screens ...........................................................................................87
The Certificates Screens ...........................................................................................................97
The Firewall Screens ................................................................................................................119
Content Filter ...........................................................................................................................129
The Remote Management Screens .........................................................................................133
QoS .........................................................................................................................................145
The Logs Screens ...................................................................................................................149
The Status Screen ...................................................................................................................163
Troubleshooting .......................................................................................................................173
Product Specifications .............................................................................................................181
Contents Overview
OX253P User’s Guide
10
Table of Contents
OX253P User’s Guide 11
Table of Contents
About This User's Guide..........................................................................................................3
Document Conventions............................................................................................................4
Safety Warnings........................................................................................................................6
Contents Overview...................................................................................................................9
Table of Contents....................................................................................................................11
Part I: User’s Guide................................................................................17
Chapter 1
Getting Started........................................................................................................................19
1.1 About Your OX253P ............................................................................................................19
1.1.1 WiMAX Internet Access .............................................................................................19
1.2 OX253P Hardware ..............................................................................................................20
1.2.1 LEDs ..........................................................................................................................20
1.3 Good Habits for Managing the Device .................................................................................21
Chapter 2
Introducing the Web Configurator........................................................................................23
2.1 Overview ..............................................................................................................................23
2.1.1 Accessing the Web Configurator ................................................................................23
2.2 The Main Screen .................................................................................................................25
Chapter 3
Internet Connection Wizard...................................................................................................29
3.1 Overview ..............................................................................................................................29
3.1.1 Welcome to the Setup Wizard ....................................................................................29
3.1.2 System Information ....................................................................................................30
3.1.3 Authentication Settings ..............................................................................................31
3.1.4 IP Address ..................................................................................................................33
3.1.5 Setup Complete .........................................................................................................34
Chapter 4
Tutorials...................................................................................................................................35
4.1 Overview ..............................................................................................................................35
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4.2 Setting Up a Small Network .................................................................................................35
4.2.1 Connecting Your Small Network to the Internet .........................................................37
4.2.2 Changing Service Providers .......................................................................................37
4.2.3 Blocking Web Access During Specific Hours .............................................................39
4.2.4 Blocking Web Sites by Keyword ................................................................................42
4.3 Remotely Managing Your OX253P ......................................................................................44
Part II: Technical Reference..................................................................45
Chapter 5
The Setup Screens..................................................................................................................47
5.1 Overview ..............................................................................................................................47
5.1.1 What You Can Do in This Chapter .............................................................................47
5.1.2 What You Need to Know ............................................................................................47
5.1.3 Before You Begin .......................................................................................................48
5.2 Set IP Address .....................................................................................................................48
5.3 DHCP Client ........................................................................................................................49
5.4 Time Setting .........................................................................................................................50
5.4.1 Pre-Defined NTP Time Servers List ...........................................................................51
5.4.2 Resetting the Time .....................................................................................................52
Chapter 6
The LAN Configuration Screens............................................................................................53
6.1 Overview ..............................................................................................................................53
6.1.1 What You Can Do in This Chapter .............................................................................53
6.1.2 What You Need to Know ............................................................................................53
6.2 DHCP Setup ........................................................................................................................54
6.3 Static DHCP .........................................................................................................................56
6.4 IP Static Route .....................................................................................................................57
6.4.1 IP Static Route Setup .................................................................................................58
6.5 Other Settings ......................................................................................................................59
6.6 Technical Reference ............................................................................................................60
6.6.1 IP Address and Subnet Mask .....................................................................................61
6.6.2 DHCP Setup ...............................................................................................................61
6.6.3 LAN TCP/IP ................................................................................................................62
6.6.4 DNS Server Address ..................................................................................................62
6.6.5 RIP Setup ...................................................................................................................63
6.6.6 Multicast .....................................................................................................................63
Chapter 7
The WAN Configuration Screens...........................................................................................65
Table of Contents
OX253P User’s Guide 13
7.1 Overview ..............................................................................................................................65
7.1.1 What You Can Do in This Chapter .............................................................................65
7.1.2 What You Need to Know ............................................................................................65
7.2 Internet Connection .............................................................................................................68
7.3 WiMAX Configuration ..........................................................................................................70
7.3.1 Frequency Ranges .....................................................................................................72
7.3.2 Configuring Frequency Settings .................................................................................73
7.3.3 Using the WiMAX Frequency Screen .........................................................................73
7.4 Buzzer .................................................................................................................................74
7.5 Advanced .............................................................................................................................75
Chapter 8
The NAT Configuration Screens............................................................................................77
8.1 Overview ..............................................................................................................................77
8.1.1 What You Can Do in This Chapter .............................................................................77
8.2 General ................................................................................................................................77
8.3 Port Forwarding ..................................................................................................................78
8.3.1 Port Forwarding Options ............................................................................................79
8.3.2 Port Forwarding Rule Setup .......................................................................................81
8.4 Trigger Port ..........................................................................................................................82
8.4.1 Trigger Port Forwarding Example ..............................................................................84
8.5 ALG .....................................................................................................................................85
Chapter 9
The System Configuration Screens......................................................................................87
9.1 Overview ..............................................................................................................................87
9.1.1 What You Can Do in This Chapter .............................................................................87
9.1.2 What You Need to Know ............................................................................................87
9.2 General ...............................................................................................................................89
9.3 Dynamic DNS ......................................................................................................................90
9.4 Firmware ..............................................................................................................................92
9.4.1 The Firmware Upload Process ...................................................................................93
9.5 Configuration .......................................................................................................................93
9.5.1 The Restore Configuration Process ...........................................................................94
9.6 Restart .................................................................................................................................95
9.6.1 The Restart Process ..................................................................................................95
9.7 Bridge ..................................................................................................................................95
Chapter 10
The Certificates Screens........................................................................................................97
10.1 Overview ............................................................................................................................97
10.1.1 What You Can Do in This Chapter ...........................................................................97
10.1.2 What You Need to Know ..........................................................................................97
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OX253P User’s Guide
14
10.2 My Certificates ...................................................................................................................98
10.2.1 My Certificates Create ............................................................................................100
10.2.2 My Certificate Edit ..................................................................................................104
10.2.3 My Certificate Import ............................................................................................107
10.3 Trusted CAs .....................................................................................................................108
10.3.1 Trusted CA Edit ......................................................................................................110
10.3.2 Trusted CA Import ..................................................................................................113
10.4 Technical Reference .........................................................................................................113
10.4.1 Certificate Authorities ..............................................................................................114
10.4.2 Verifying a Certificate ..............................................................................................116
Chapter 11
The Firewall Screens............................................................................................................119
11.1 Overview ...........................................................................................................................119
11.1.1 What You Can Do in This Chapter ..........................................................................119
11.1.2 What You Need to Know .........................................................................................119
11.2 Firewall Setting ................................................................................................................120
11.2.1 Firewall Rule Directions ..........................................................................................120
11.2.2 Triangle Route ........................................................................................................121
11.2.3 Firewall Setting Options .........................................................................................122
11.3 Services ...........................................................................................................................123
11.4 Technical Reference ........................................................................................................124
11.4.1 Stateful Inspection Firewall. ....................................................................................124
11.4.2 Guidelines For Enhancing Security With Your Firewall ..........................................125
11.4.3 The “Triangle Route” Problem ................................................................................125
Chapter 12
Content Filter.........................................................................................................................129
12.1 Overview ..........................................................................................................................129
12.1.1 What You Can Do in This Chapter .........................................................................129
12.2 Filter .................................................................................................................................130
12.3 Schedule ..........................................................................................................................132
Chapter 13
The Remote Management Screens.....................................................................................133
13.1 Overview ..........................................................................................................................133
13.1.1 What You Can Do in This Chapter .........................................................................133
13.1.2 What You Need to Know ........................................................................................134
13.2 WWW ..............................................................................................................................135
13.3 Telnet ...............................................................................................................................136
13.4 FTP ..................................................................................................................................136
13.5 SNMP ..............................................................................................................................137
13.5.1 SNMP Traps ...........................................................................................................138
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OX253P User’s Guide 15
13.5.2 SNMP Options .......................................................................................................139
13.6 DNS .................................................................................................................................140
13.7 Security ............................................................................................................................141
13.8 CWMP-TR069 .................................................................................................................142
Chapter 14
QoS.........................................................................................................................................145
14.1 Overview ..........................................................................................................................145
14.2 General ............................................................................................................................145
14.3 Class Setup .....................................................................................................................146
14.3.1 Class Configuration ................................................................................................147
Chapter 15
The Logs Screens.................................................................................................................149
15.1 Overview ..........................................................................................................................149
15.1.1 What You Can Do in This Chapter .........................................................................149
15.1.2 What You Need to Know ........................................................................................149
15.2 View Logs ........................................................................................................................151
15.3 Log Settings .....................................................................................................................153
15.4 Log Message Descriptions ..............................................................................................155
Chapter 16
The Status Screen.................................................................................................................163
16.1 Overview ..........................................................................................................................163
16.2 Status Screen ..................................................................................................................163
16.2.1 Packet Statistics .....................................................................................................167
16.2.2 WiMAX Site Information .........................................................................................168
16.2.3 DHCP Table ...........................................................................................................169
16.2.4 WiMAX Profile ........................................................................................................170
16.3 Technical Reference ........................................................................................................171
Chapter 17
Troubleshooting....................................................................................................................173
17.1 Power, Hardware Connections, and LEDs ......................................................................173
17.2 OX253P Access and Login ..............................................................................................174
17.3 Internet Access ................................................................................................................176
17.4 Export a Certificate File ...................................................................................................178
17.5 Reset the OX253P to Its Factory Defaults .......................................................................179
17.5.1 Pop-up Windows, JavaScripts and Java Permissions ...........................................179
Chapter 18
Product Specifications.........................................................................................................181
Appendix A WiMAX Security................................................................................................185
Table of Contents
OX253P User’s Guide
16
Appendix B Setting Up Your Computer’s IP Address...........................................................189
Appendix C Pop-up Windows, JavaScripts and Java Permissions......................................217
Appendix D IP Addresses and Subnetting...........................................................................229
Appendix E Importing Certificates........................................................................................241
Appendix F Common Services.............................................................................................271
Index.......................................................................................................................................275
17
PART I
User’s Guide
18
OX253P User’s Guide 19
CHAPTER 1
Getting Started
1.1 About Your OX253P
The OX253P has a built-in switch and allows you to access the Internet by
connecting to a WiMAX wireless network.
You can configure firewall and content filtering as well as a host of other features.
The web browser-based Graphical User Interface (GUI), also known as the web
configurator, provides easy management.
See Chapter 18 on page 181 for a complete list of features for your model.
1.1.1 WiMAX Internet Access
Connect your computer or network to the OX253P for WiMAX Internet access. See
the Quick Start Guide for instructions on hardware connection.
In a wireless metropolitan area network (MAN), the OX253P connects to a WiMAX
base station (BS) for Internet access.
The following diagram shows a notebook computer equipped with the OX253P
connecting to the Internet through a WiMAX base station (marked BS).
Figure 1 Mobile Station and Base Station
When the firewall is on, all incoming traffic from the Internet to your network is
blocked unless it is initiated from your network.
Use content filtering to block access to web sites with URLs containing keywords
that you specify. You can define time periods and days during which content
Chapter 1Getting Started
OX253P User’s Guide
20
filtering is enabled and include or exclude particular computers on your network
from content filtering. For example, you could block access to certain web sites for
the kids.
1.2 OX253P Hardware
Follow the instructions in the Quick Start Guideto make hardware connections.
1.2.1 LEDs
The following figure shows the LEDs (lights) on the OX253P.
Figure 2 The OX253P’s LEDs
The following table describes your OX253P’s LEDs (from right to left).
Table 2 The OX253P
LED STATE DESCRIPTION
Power
(IDU only) OffThe OX253P is not receiving power.
GreenThe OX253P is receiving power and functioning correctly.
STRENGTH
INDICATORS
ACTIVITY
INDICATOR
Chapter 1Getting Started
OX253P User’s Guide 21
1.3 Good Habits for Managing the Device
Do the following things regularly to make the OX253P more secure and to manage
the OX253P more effectively.
•Change the password. Use a password that’s not easy to guess and that consists
of different types of characters, such as numbers and letters.
•Write down the password and put it in a safe place.
•Back up the configuration (and make sure you know how to restore it).
Restoring an earlier working configuration may be useful if the OX253P becomes
unstable or even crashes. If you forget your password, you will have to reset the
OX253P to its factory default settings. If you backed up an earlier configuration
file, you would not have to totally re-configure the OX253P. You could simply
restore your last configuration.
Strength
Indicator The Strength Indicator LEDs display the Received Signal Strength Indication
(RSSI) of the wireless (WiMAX) connection.
5 Signal LEDsThe signal strength is greater than or equal to -59 dBm.
4 Signal LEDsThe signal strength is between -69 and -60 dBm.
3 Signal LEDsThe signal strength is between -79 and -70 dBm.
2 Signal LEDsThe signal strength is between -89 and -90 dBm.
1 Signal LEDThe signal strength is between -90 and -95 dBm.
0 Signal LEDsThere is no WiMAX connection.
Activity
Indicator OffThe OX253P is not ready.
GreenThe OX253P is connected to the network.
BlinkingThe OX253P system is booting up or the OX253P is seeking
a viable signal.
Table 2 The OX253P
LED STATE DESCRIPTION
Chapter 1Getting Started
OX253P User’s Guide
22
OX253P User’s Guide 23
CHAPTER 2
Introducing the Web
Configurator
2.1 Overview
The web configurator is an HTML-based management interface that allows easy
device set up and management via any web browser that supports: HTML 4.0,
CSS 2.0, and JavaScript 1.5, and higher. The recommended screen resolution for
using the web configurator is 1024 by 768 pixels and 16-bit color, or higher.
In order to use the web configurator you need to allow:
•Web browser pop-up windows from your device. Web pop-up blocking is enabled
by default in many operating systems and web browsers.
•JavaScript (enabled by default in most web browsers).
•Java permissions (enabled by default in most web browsers).
See the Appendix C on page 217 for more information on configuring your web
browser.
2.1.1 Accessing the Web Configurator
1Make sure your OX253P hardware is properly connected (refer to the Quick Start
Guide for more information).
2Launch your web browser.
3Enter "192.168.1.1" as the URL.
4Select your preferable language from the language drop-down list.
Chapter 2Introducing the Web Configurator
OX253P User’s Guide
24
5A password screen displays. Enter the default username (admin) and password
(admin) and then click Login. Click Cancel to revert to the default password in
the password field. If you have changed the password, enter your password and
click Login.
6The following screen displays. Click Apply to have the OX253P generate a new
certificate. You can also click Ignore to have the OX253P use the default
certificate.
7A screen displays to let you choose to go to the Wizard or the Advanced screens.
•Click Go to Wizard setup if you are logging in for the first time or if you
want to make basic changes. The wizard selection screen appears. See
Chapter 3 on page 29 for more information.
•Click Go to Advanced setup if you want to configure features that are not
available in the wizards. The main screen appears. See Section 16.2 on
page 163 for more information.
•Click Exit if you want to log out.
Chapter 2Introducing the Web Configurator
OX253P User’s Guide 25
Note: For security reasons, the OX253P automatically logs you out if you do not use
the Web Configurator for five minutes. If this happens, log in again.
2.2 The Main Screen
When you first log into the web configurator and by-pass the wizard, the Main
screen appears. Here you can view a summary of your OX253P connection status.
This is also the default “home” page for the web configurator and it contains
conveniently-placed shortcuts to all of the other screens.
Note: Some features in the web configurator may not be available depending on your
firmware version and/or configuration.
Figure 3 Main Screen
The following table describes the icons in this screen.
Table 3 Main > Icons
ICON DESCRIPTION
MAIN
Click to return to the Main screen.
SETUP
Click to go the Setup screen, where you can configure LAN,
DHCP and WAN settings.
Chapter 2Introducing the Web Configurator
OX253P User’s Guide
26
The following table describes the labels in this screen.
ADVANCED
Click to go to the Advanced screen, where you can configure
features like Port Forwarding and Triggering, SNTP and so on.
TOOLS
Click to go the Tools screen, where you can configure your
firewall, QoS, and content filter, among other things.
STATUS
Click to go to the Status screen, where you can view status and
statistical information for all connections and interfaces.
Strength Indicator
Displays a visual representation of the quality of your WiMAX
connection.
•Disconnected - Zero bars
•Poor reception - One bar
•Good reception - Two bars
•Excellent reception - Three bars
Table 4 Main
LABEL DESCRIPTION
WizardClick to run the Internet Connection Setup Wizard. All of the
settings that you can configure in this wizard are also available
in these web configurator screens.
LogoutClick to log out of the web configurator.
Note: This does not log you off the WiMAX network, it simply
logs you out of the OX253P’s browser-based
configuration interface.
WiMAX Connection
Status This field indicates the current status of your WiMAX connection.
Status messages are as follows:
•Connected - Indicates that the OX253P is connected to the
WiMAX network. Use the Strength Indicator icon to
determine the quality of your network connection.
•Disconnected - Indicates that the OX253P is not connected
to the WiMAX network.
•DL_SYN - Indicates a download synchronization is in
progress. This means the firmware is checking with the
server for any updates or settings alterations.
Table 3 Main > Icons (continued)
ICON DESCRIPTION
Chapter 2Introducing the Web Configurator
OX253P User’s Guide 27
Software VersionThis field indicates the version number of the OX253P’s
firmware. The version number takes the form of:
Version(Build),release status (candidate) | Version Release
Date.
For example: V3.70(TPG.0)c4 | 07/08/2010 indicates that the
firmware is 3.70, build TPG.0, candidate 4, released on July 08,
2010.
Version DateThis field indicates the exact date and time the current firmware
was compiled.
System UptimeThis field indicates how long the OX253P has been on. This
resets every time you shut the device down or restart it.
WiMAX UptimeThis field indicates how long the OX253P has been connected to
the WiMAX network. This resets every time you disconnect from
the WiMAX network, shut the device down, or restart it.
Table 4 Main (continued)
LABEL DESCRIPTION
Chapter 2Introducing the Web Configurator
OX253P User’s Guide
28
OX253P User’s Guide 29
CHAPTER 3
Internet Connection Wizard
3.1 Overview
This chapter provides information on the Setup Wizard screens. The wizard guides
you through several steps where you can configure your Internet settings.
3.1.1 Welcome to the Setup Wizard
This is the welcome screen for the Setup Wizard.
The Internet Connection Wizard screens are described in detail in the following
sections.
Figure 4 Select a Mode
Chapter 3Internet Connection Wizard
OX253P User’s Guide
30
3.1.2 System Information
This Internet Connection Wizard screen allows you to configure your OX253P’s
system information. The settings here correspond to the ADVANCED > System
Configuration > General screen (see Section 9.2 on page 89 for more).
Figure 5 Internet Connection Wizard > System Information
The following table describes the labels in this screen.
Table 5 Internet Connection Wizard > System Information
LABEL DESCRIPTION
System
Name System Name is a unique name to identify the OX253P in an Ethernet
network. Enter a descriptive name. This name can be up to 30
alphanumeric characters long. Spaces are not allowed, but dashes "-" and
underscores "_" are accepted.
Domain
Name Type the domain name (if you know it) here. If you leave this field blank,
the ISP may assign a domain name via DHCP. The domain name entered
by you is given priority over the ISP assigned domain name.
Back Click to display the previous screen.
Next Click to proceed to the next screen.
Close Click to close the wizard without saving.
Chapter 3Internet Connection Wizard
OX253P User’s Guide 31
3.1.3 Authentication Settings
This Internet Connection Wizard screen allows you to configure your Internet
access settings. The settings here correspond to the ADVANCED > WAN
Configuration > Internet Connection screen (see Section 7.2 on page 68 for
more information).
Figure 6 Internet Connection Wizard > Authentication Settings Screen
The following table describes the labels in this screen.
Table 6 Internet Connection Wizard > Authentication Settings Screen
LABEL DESCRIPTION
User NameUse this field to enter the username associated with your Internet
access account. You can enter up to 61 printable ASCII characters.
PasswordUse this field to enter the password associated with your Internet access
account. You can enter up to 47 printable ASCII characters.
Anonymous
Identity Enter the anonymous identity provided by your Internet Service
Provider. Anonymous identity (also known as outer identity) is used with
EAP-TTLS encryption. The anonymous identity is used to route your
authentication request to the correct authentication server, and does not
reveal your real user name. Your real user name and password are
encrypted in the TLS tunnel, and only the anonymous identity can be
seen.
Leave this field blank if your ISP did not give you an anonymous identity
to use.
PKMThis field displays the Privacy Key Management version number. PKM
provides security between the OX253P and the base station. At the time
of writing, the OX253P supports PKMv2 only. See the WiMAX security
appendix for more information.
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32
AuthenticationThis field displays the user authentication method. Authentication is the
process of confirming the identity of a mobile station (by means of a
username and password, for example).
Check with your service provider if you are unsure of the correct setting
for your account.
Choose from the following user authentication methods:
•TTLS (Tunnelled Transport Layer Security)
•TLS (Transport Layer Security)
Note: Not all OX253Ps support TLS authentication. Check with your
service provider for details.
TTLS Inner EAPThis field displays the type of secondary authentication method. Once a
secure EAP-TTLS connection is established, the inner EAP is the protocol
used to exchange security information between the mobile station, the
base station and the AAA server to authenticate the mobile station. See
the WiMAX security appendix for more details. The OX253P supports the
following inner authentication types:
•CHAP (Challenge Handshake Authentication Protocol)
•MSCHAP (Microsoft CHAP)
•MSCHAPV2 (Microsoft CHAP version 2)
•PAP (Password Authentication Protocol)
CertificateThis is the security certificate the OX253P uses to authenticate the AAA
server. Use the TOOLS > Certificates > Trusted CA screen to import
certificates to the OX253P.
Back Click to display the previous screen.
Next Click to proceed to the next screen.
Close Click to close the wizard without saving.
Table 6 Internet Connection Wizard > Authentication Settings Screen (continued)
LABEL DESCRIPTION
Chapter 3Internet Connection Wizard
OX253P User’s Guide 33
3.1.4 IP Address
This Internet Connection Wizard screen allows you to configure your IP address.
The settings here correspond to the SETUP > Set IP Address screen (see
Section 5.2 on page 48).
A fixed IP address is a static IP that your ISP gives you. An automatic (dynamic)
IP address is not fixed; the ISP assigns you a different one each time you connect
to the Internet.
Figure 7 Internet Connection Wizard > IP Address
The following table describes the labels in this screen.
Table 7 Internet Connection Wizard > IP Address
LABEL DESCRIPTION
IP Address
My computer or device
gets its IP address
automatically from the
network
Select this if you have a dynamic IP address. A dynamic IP
address is not fixed; the ISP assigns you a different one each
time you connect to the Internet.
Use fixed IP AddressA static IP address is a fixed IP that your ISP gives you.
BackClick to display the previous screen.
Next Click to proceed to the next screen.
Close Click to close the wizard screen without saving.
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34
3.1.5 Setup Complete
Click Close to complete and save the Internet Connection Wizard settings.
Figure 8 Internet Connection Wizard > Complete
Launch your web browser and navigate to a website of your choice . If everything
was configured properly, the web page should display. You can now surf the
Internet!
Refer to the rest of this guide for more detailed information on the complete range
of OX253P features available in the more advanced web configurator.
Note: If you cannot access the Internet, open the web configurator again to confirm
that the Internet settings you configured in the wizard setup are correct.
OX253P User’s Guide 35
CHAPTER 4
Tutorials
4.1 Overview
This chapter shows you how to configure some of the OX253P’s features.
Note: Be sure to read Introducing the Web Configurator on page 23 before working
through the tutorials presented here. For field descriptions of individual screens,
see the related technical reference in this User's Guide.
4.2 Setting Up a Small Network
This tutorial shows you how to set up a small network in your office or home.
Goal: Connect three computers to your OX253P to form a small network.
Chapter 4Tutorials
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36
Required: The following table provides a summary of the information you will
need to complete the tasks in this tutorial.
1In the Web Configurator, open the SETUP > Set IP Address screen and set the
IP Address to 192.168.100.1. Use the default IP Subnet Mask of 255.255.255.0.
2Open the ADVANCED > LAN Configuration > DHCP Setup screen.
3Select Enable DHCP Server, then enter 192.168.100.34 as your IP Pool
Starting Address and 32 for your Pool Size.
4In the DNS Server section, set the First,Second and Third DNS Server fields
to From ISP in order to use the DNS servers linked to your ISP.
5Click Apply to save your DHCP settings.
INFORMATION VALUE SEE ALSO
LAN IP Address192.168.100.1 Chapter 5 on page 47
Starting IP Address192.168.100.33 Chapter 6 on page 53
Pool Size32
DNS ServersFrom ISP
Chapter 4Tutorials
OX253P User’s Guide 37
6Next, go to the ADVANCED > NAT Configuration > General screen and select
the Enable Network Address Translation option.
7Click Apply to save your settings.
8Connect your computers to the OX253P’s Ethernet ports and you’re all set!
Note: You may need to configure the computers on your LAN to automatically obtain
IP addresses. For information on how to do this, see Appendix B on page 189.
4.2.1 Connecting Your Small Network to the Internet
Once your network is configured and hooked up, you will want to connect it to the
Internet next. To do this, just run the Internet Connection Wizard (Chapter 3
on page 29), which walks you through the process.
4.2.2 Changing Service Providers
This tutorial shows you how to import a new security certificate, which allows your
device to communicate with the company’s network servers. This is necessary if
you ever change Internet Service Providers and your OX253P is still compatible
with the new network. (In some cases it may not be.)
Goal: Import a new security certificate into the OX253P.
See Also:Chapter 10 on page 97.
Chapter 4Tutorials
OX253P User’s Guide
38
1In the Web Configurator, open the TOOLS > Certificates > My Certificates
screen and click the Import button.
2In the Import Certificate screen, click Browse andlocate the security certificate
that was provided by your new ISP.
Chapter 4Tutorials
OX253P User’s Guide 39
3Next, go to the ADVANCED > WAN Configuration screen and configure your
new Internet access settings based on the information provided by your ISP.
Note: You can also use the Internet Connection Wizard to configure these settings.
4From the Certificates menu, select the security certificate that you just imported.
5Click Apply to save your settings. You should now be able to connect to the
Internet through your new service provider!
4.2.3 Blocking Web Access During Specific Hours
If your OX253P is in a home or office environment you may decide that you want
to block web access and video chat during a specific block of hours, such as during
your daughter’s designated study hours.
Goal: Configure the OX253P’s firewall to block web and video chat access on
weekdays between the hours of 3:30 PM and 8:30 PM.’
See Also:Chapter 11 on page 119.
Chapter 4Tutorials
OX253P User’s Guide
40
1Open the TOOLS > Firewall > Services to screen.
2Select Enable Services Blocking.
Chapter 4Tutorials
OX253P User’s Guide 41
3Under Available Services, select HTTP(TCP:80) then click the Add button.
Repeat this for CU-SEEME(TCP/UDP:7648,24032).
This blocks all web and video chat traffic, while leaving other ports open for other
types of traffic, such as ports 25 and 587 for e-mail and port 21 for FTP.
The Blocked Services window updates accordingly.
4Next, configure the Schedule to Block area with the days and hours for blocking
web access to your employees.
In this example, the five weekly work days are selected as well as the standard
work hours of 3:30 PM to 8:30 PM (or 20:30 in 24-hour format).
5Finally, click Apply to save your settings.
Chapter 4Tutorials
OX253P User’s Guide
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4.2.4 Blocking Web Sites by Keyword
You can further refine web access by specifying keywords that appear in a URL
and blocking them. This allows you to control the content you do allow to pass
through the OX253P. For example, once your daughter’s designated study hours
end, you allow web access and video chat but want to restrict certain sites.
Goal: Restrict websites with the words “poker”, “sex”, and “beer” in their URLs.
See Also:Chapter 12 on page 129.
1Open the TOOLS > Content Filter > Filter screen.
2Select Enable URL Keyword Blocking.
Chapter 4Tutorials
OX253P User’s Guide 43
3Enter the first Keyword then click Add. Repeat for additional keywords.
As you enter them, the keywords appear in the Keyword List.
4(Optional) If you want to allow websites with these keywords for a specific
computer in your household, such as the computer in the master bedroom, then
add that computer’s IP address to the Trusted IP Address field.
5Click Apply to save these settings.
6Next, open the TOOLS > Content Filter > Schedule screen.
7To keep things simple, set the Days to Block to Everyday and the Time of Day
to Block to All Day.
8Click Apply to save these settings.
Chapter 4Tutorials
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4.3 Remotely Managing Your OX253P
The remote management feature allows you to log into the device over the
Internet and configure its settings from a second trusted location.
Goal: Set up the OX253P to allow management requests from the
(demonstration) IP address 2.2.2.2.
See Also:Chapter 13 on page 133.
1Open the TOOLS > Remote Management > WWW screen.
2Leave the Server Port setting as ‘80’, in order to allow computers back at the
OX253P’s location to continue to access the Internet.
3From the Server Access menu, select WAN. This allows remote management
connections only from the Internet.
4Finally, in the Secured Client IP Address field enter 2.2.2.2 as the IP address
from which you will be connecting to the OX253P. Any other attempts by
computer on the Internet to connect will be rejected because their IP addresses
won’t match the one specified here.
5Click Apply to save your changes.
45
PART II
Technical Reference
46
OX253P User’s Guide 47
CHAPTER 5
The Setup Screens
5.1 Overview
Use these screens to configure or view LAN, DHCP Client and WAN settings.
5.1.1 What You Can Do in This Chapter
•The Set IP Address screen (Section 5.2 on page 48) lets you configure the
OX253P’s IP address and subnet mask.
•The DHCP Client screen (Section 5.3 on page 49) to view connection
information for clients configured by the OX253P’s internal DHCP server.
•The Time Setting screen (Section 5.4 on page 50) lets you configure your
OX253P’s time and date keeping settings.
5.1.2 What You Need to Know
The following terms and concepts may help as you read through this chapter.
LAN
A Local Area Network, or a shared communication system to which many
computers are attached. A LAN, as its name implies, is limited to a local area such
as a home or office environment. LANs have different topologies, the most
common being the linear bus and the star configuration.
IP Address
IP addresses identify individual devices on a network. Every networking device
(including computers, servers, routers, printers, etc.) needs an IP address to
communicate across the network. These networking devices are also known as
hosts.
Subnet Mask
The subnet mask specifies the network number portion of an IP address. Your
device will compute the subnet mask automatically based on the IP Address that
Chapter 5The Setup Screens
OX253P User’s Guide
48
you entered. You do not need to change the computer subnet mask unless you are
instructed to do so.
Daytime
A network protocol used by devices for debugging and time measurement. A
computer can use this protocol to set its internal clock but only if it knows in which
order the year, month, and day are returned by the server. Not all servers use the
same format.
Time
A network protocol for retrieving the current time from a server. The computer
issuing the command compares the time on its clock to the information returned
by the server, adjusts itself automatically for time zone differences, then
calculates the difference and corrects itself if there has been any temporal drift.
NTP
NTP stands for Network Time Protocol. It is employed by devices connected to the
Internet in order to obtain a precise time setting from an official time server.
These time servers are accurate to within 200 microseconds.
5.1.3 Before You Begin
•Make sure that you have made all the appropriate hardware connections to the
OX253P, as described in the Quick Start Guide.
•Make sure that you have logged in to the web configurator at least one time and
changed your password from the default, as described in the Quick Start Guide.
5.2 Set IP Address
Click the SETUP icon in the navigation bar to set up the OX253P’s IP address and
subnet mask. This screen displays this screen by default. If you are in any other
sub-screen you can simply choose Set IP Address from the navigation menu on
the left to open it again.
Figure 9 SETUP > Set IP Address
Chapter 5The Setup Screens
OX253P User’s Guide 49
The following table describes the labels in this screen.
5.3 DHCP Client
Click the SETUP > DHCP Client to view connection information for all clients that
have been configured by the OX253P’s internal DHCP server.
Figure 10 SETUP > Set IP Address
The following table describes the labels in this screen.
Table 8 SETUP > Set IP Address
LABEL DESCRIPTION
IP Address Enter the IP address of the OX253P on the LAN.
Note: This field is the IP address you use to access the
OX253P on the LAN. If the web configurator is running
on a computer on the LAN, you lose access to it as
soon as you change this field and click Apply. You can
access the web configurator again by typing the new
IP address in the browser.
IP Subnet Mask Enter the subnet mask of the LAN.
Apply Click to save your changes.
Reset Click to restore your previously saved settings.
Table 9 SETUP > Set IP Address
LABEL DESCRIPTION
#This indicates the number of the item in this list.
IP Address This indicates the IP address of a connected client device.
Host Name This indicates the host name of a connected client device. If the
device is computer, then the host name is the computer name.
MAC Address This indicates the MAC address of a connected client device.
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50
5.4 Time Setting
Click SETUP >Time Setting to set the date, time, and time zone for the
OX253P.
Figure 11 SETUP > Time Setting
The following table describes the labels in this screen.
Reserve This indicates whether the IP address for the connected client
device is reserved. When the DHCP server issues IP addresses,
reserved IPs are assigned to specific client devices.
If the IP address is reserved, the client device identified by its
MAC address will always receive this IP address from the DHCP
server.
Apply Click to save your changes.
Refresh Click to refresh the information in the screen.
Table 9 SETUP > Set IP Address (continued)
LABEL DESCRIPTION
Table 10 SETUP > Time Setting
LABEL DESCRIPTION
Current Time and Date
Current TimeDisplays the current time according to the OX253P.
Chapter 5The Setup Screens
OX253P User’s Guide 51
5.4.1 Pre-Defined NTP Time Servers List
The OX253P uses a pre-defined list of NTP time servers if you do not specify a
time server or it cannot synchronize with the time server you specified. It can use
this list regardless of the time protocol you select.
When the OX253P uses the list, it randomly selects one server and tries to
synchronize with it. If the synchronization fails, then it goes through the rest of
Current DateDisplays the current time according to the OX253P.
Time and Date Setup
Manual Select this if you want to specify the current date and time in the
fields below.
New Time Enter the new time in this field, and click Apply.
New Date Enter the new date in this field, and click Apply.
Get from Time Server Select this if you want to use a time server to update the current
date and time in the OX253P.
Time ProtocolSelect the time service protocol that your time server
uses.Check with your ISP or network administrator, or use trial-
and-error to find a protocol that works.
Daytime (RFC-867) - This format is day/month/year/time
zone.
Time (RFC-868) - This format displays a 4-byte integer giving
the total number of seconds since 1970/1/1 at 0:0:0.
NTP (RFC-1305) - This format is similar to Time (RFC 868).
Time Server
Address Enter the IP address or URL of your time server. Check with your
ISP or network administrator if you are unsure of this
information.
Time Zone Setup
Time ZoneSelect the time zone at your location.
Daylight SavingsSelect this if your location uses daylight savings time. Daylight
savings is a period from late spring to early fall when many
places set their clocks ahead of normal local time by one hour to
give more daytime light in the evening.
Start DateEnter which hour on which day of which week of which month
daylight-savings time starts.
End DateEnter which hour on the which day of which week of which
month daylight-savings time ends.
Apply Click to save your changes.
Reset Click to restore your previously saved settings.
Table 10 SETUP > Time Setting (continued)
LABEL DESCRIPTION
Chapter 5The Setup Screens
OX253P User’s Guide
52
the list in order until either it is successful or all the pre-defined NTP time servers
have been tried.
5.4.2 Resetting the Time
The OX253P automatically resets the time in the following circumstances:
•When the device starts up, such as when you press the Power button.
•When you click Apply in the SETUP > Time Setting screen.
•Once every 24-hours after starting up.
Table 11 Pre-defined NTP Time Servers
ntp1.cs.wisc.edu
ntp1.gbg.netnod.se
ntp2.cs.wisc.edu
tock.usno.navy.mil
ntp3.cs.wisc.edu
ntp.cs.strath.ac.uk
ntp1.sp.se
time1.stupi.se
tick.stdtime.gov.tw
tock.stdtime.gov.tw
time.stdtime.gov.tw
OX253P User’s Guide 53
CHAPTER 6
The LAN Configuration Screens
6.1 Overview
Use the ADVANCED > LAN Configuration screens to set up the OX253P on the
LAN. You can configure its IP address and subnet mask, DHCP services, and other
subnets. You can also control how the OX253P sends routing information using
RIP.
A Local Area Network (LAN) is a shared communication system to which many
computers are attached. A LAN is usually a computer network limited to the
immediate area, such as the same building or floor of a building.
6.1.1 What You Can Do in This Chapter
•The DHCP Setup screen (Section 6.2 on page 54) lets you enable, disable, and
configure the DHCP server in the OX253P.
•The Static DHCP screen (Section 6.3 on page 56) lets you assign specific IP
addresses to specific computers on the LAN.
•The IP Static Route screen (Section 6.4 on page 57) lets you examine the
static routes configured in the OX253P.
•The Other Settings screen (Section 6.5 on page 59) lets you control the
routing information that is sent and received by each subnet assign specific IP
addresses to specific computers on the LAN.
6.1.2 What You Need to Know
The following terms and concepts may help as you read through this chapter.
IP Address
IP addresses identify individual devices on a network. Every networking device
(including computers, servers, routers, printers, etc.) needs an IP address to
communicate across the network. These networking devices are also known as
hosts.
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54
Subnet Masks
Subnet masks determine the maximum number of possible hosts on a network.
You can also use subnet masks to divide one network into multiple sub-networks.
DNS
DNS (Domain Name System) is for mapping a domain name to its corresponding
IP address and vice versa. The DNS server is extremely important because
without it, you must know the IP address of a networking device before you can
access it.
DHCP
A DHCP (Dynamic Host Configuration Protocol) server can assign your OX253P an
IP address, subnet mask, DNS and other routing information when it’s turned on.
6.2 DHCP Setup
Click ADVANCED > LAN Configuration > DHCP Setup to enable, disable, and
configure the DHCP server in the OX253P.
Figure 12 ADVANCED > LAN Configuration > DHCP Setup
The following table describes the labels in this screen.
Table 12 ADVANCED > LAN Configuration > DHCP Setup
LABEL DESCRIPTION
DHCP Setup
Enable DHCP
Server Select this if you want the OX253P to be the DHCP server on the LAN.
As a DHCP server, the OX253P assigns IP addresses to DHCP clients on
the LAN and provides the subnet mask and DNS server information.
Chapter 6The LAN Configuration Screens
OX253P User’s Guide 55
IP Pool Starting
Address Enter the IP address from which the OX253P begins allocating IP
addresses, if you have not specified an IP address for this computer in
ADVANCED > LAN Configuration > Static DHCP.
Pool Size Enter the number of IP addresses to allocate. This number must be at
least one and is limited by a subnet mask of 255.255.255.0 (regardless
of the subnet the OX253P is in). For example, if the IP Pool Start
Address is 10.10.10.10, the OX253P can allocate up to 10.10.10.254,
or 245 IP addresses.
DNS Server
First, Second
and Third DNS
Server
Specify the IP addresses of a maximum of three DNS servers that the
network can use. The OX253P provides these IP addresses to DHCP
clients. You can specify these IP addresses two ways.
From ISP - provide the DNS servers provided by the ISP on the WAN
port.
User Defined - enter a static IP address.
DNS Relay - this setting will relay DNS information from the DNS
server obtained by the OX253P.
None - no DNS service will be provided by the OX253P.
Apply Click to save your changes.
Reset Click to restore your previously saved settings.
Table 12 ADVANCED > LAN Configuration > DHCP Setup (continued)
LABEL DESCRIPTION
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6.3 Static DHCP
Click ADVANCED > LAN Configuration > Static DHCP to assign specific IP
addresses to specific computers on the LAN.
Note: This screen has no effect if the DHCP server is not enabled. You can enable it
in ADVANCED > LAN Configuration > DHCP Setup.
Figure 13 ADVANCED > LAN Configuration > Static DHCP
The following table describes the labels in this screen.
Table 13 ADVANCED > LAN Configuration > Static DHCP
LABEL DESCRIPTION
#The number of the item in this list.
MAC Address Enter the MAC address of the computer to which you want the OX253P
to assign the same IP address.
IP Address Enter the IP address you want the OX253P to assign to the computer.
Apply Click to save your changes.
Reset Click to restore your previously saved settings.
Chapter 6The LAN Configuration Screens
OX253P User’s Guide 57
6.4 IP Static Route
Click ADVANCED > LAN Configuration > IP Static Route to look at the static
routes configured in the OX253P.
Note: The first static route is the default route and cannot be modified or deleted.
Figure 14 Advanced> LAN Configuration > IP Static Route
The following table describes the icons in this screen.
The following table describes the labels in this screen.
Table 14 Advanced> LAN Configuration > IP Static Route
ICON DESCRIPTION
Edit
Click to edit this item.
Delete
Click to delete this item.
Table 15 Advanced> LAN Configuration > IP Static Route
LABEL DESCRIPTION
#The number of the item in this list.
Name This field displays the name that describes the static route.
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6.4.1 IP Static Route Setup
Click an Edit icon in ADVANCED > LAN Configuration > IP Static Route to
edit a static route in the OX253P.
Figure 15 Advanced> LAN Configuration > IP Static Route Setup > Edit
The following table describes the labels in this screen.
Active This field shows whether this static route is active (Yes) or not (No).
Destination This field displays the destination IP address(es) that this static route
affects.
Gateway This field displays the IP address of the gateway to which the OX253P
should send packets for the specified Destination. The gateway is a
router or a switch on the same network segment as the device's LAN or
WAN port. The gateway helps forward packets to their destinations.
Action Click the Edit icon to modify this item.
Click the Delete icon to remove this item.
Table 15 Advanced> LAN Configuration > IP Static Route (continued)
LABEL DESCRIPTION
Table 16 Advanced> LAN Configuration > IP Static Route Setup > Edit
LABEL DESCRIPTION
Route Name Enter the name of the static route.
Active Select this if you want the static route to be used. Clear this if you do
not want the static route to be used.
Private Select this if you do not want the OX253P to tell other routers about this
static route. For example, you might select this if the static route is in
your LAN. Clear this if you want the OX253P to tell other routers about
this static route.
Destination IP
Address Enter one of the destination IP addresses that this static route affects.
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OX253P User’s Guide 59
6.5 Other Settings
Click ADVANCED > LAN Configuration > Other Settings to set the RIP and
Multicast options.
Figure 16 ADVANCED > LAN Configuration > Other Settings
IP Subnet Mask Enter the subnet mask that defines the range of destination IP
addresses that this static route affects. If this static route affects only
one IP address, enter 255.255.255.255.
Gateway IP
Address Enter the IP address of the gateway to which the OX253P should send
packets for the specified Destination. The gateway is a router or a
switch on the same network segment as the device's LAN or WAN port.
The gateway helps forward packets to their destinations.
Metric Usually, you should keep the default value. This field is related to RIP.
The metric represents the "cost of transmission". A router determines
the best route for transmission by choosing a path with the lowest
"cost". The smaller the metric, the lower the "cost". RIP uses hop count
as the measurement of cost, where 1 is for a directly-connected
network. The metric must be 1-15; if you use a value higher than 15,
the routers assume the link is down.
Apply Click to save your changes.
Cancel Click to return to the previous screen without saving your changes.
Table 16 Advanced> LAN Configuration > IP Static Route Setup > Edit (continued)
LABEL DESCRIPTION
Chapter 6The LAN Configuration Screens
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60
The following table describes the labels in this screen.
6.6 Technical Reference
The following section contains additional technical information about the OX253P
features described in this chapter.
Table 17 ADVANCED > LAN Configuration > Other Settings
LABEL DESCRIPTION
RIP & Multicast Setup
RIP Direction Use this field to control how much routing information the OX253P
sends and receives on the subnet.
•None - The OX253P does not send or receive routing information on
the subnet.
•Both - The OX253P sends and receives routing information on the
subnet.
•In Only - The OX253P only receives routing information on the
subnet.
•Out Only - The OX253P only sends routing information on the
subnet.
RIP Version Select which version of RIP the OX253P uses when it sends or receives
information on the subnet.
•RIP-1 - The OX253P uses RIPv1 to exchange routing information.
•RIP-2B - The OX253P broadcasts RIPv2 to exchange routing
information.
•RIP-2M - The OX253P multicasts RIPv2 to exchange routing
information.
Multicast You do not have to enable multicasting to use RIP-2M. (See RIP
Version.)
Select which version of IGMP the OX253P uses to support multicasting
on the LAN. Multicasting sends packets to some computers on the LAN
and is an alternative to unicasting (sending packets to one computer)
and broadcasting (sending packets to every computer).
•None - The OX253P does not support multicasting.
•IGMP-v1 - The OX253P supports IGMP version 1.
•IGMP-v2 - The OX253P supports IGMP version 2.
Multicasting can improve overall network performance. However, it
requires extra processing and generates more network traffic. In
addition, other computers on the LAN have to support the same version
of IGMP.
Apply Click to save your changes.
Reset Click to restore your previously saved settings.
Chapter 6The LAN Configuration Screens
OX253P User’s Guide 61
6.6.1 IP Address and Subnet Mask
Similar to the way houses on a street share a common street name, computers on
a LAN share one common network number.
Where you obtain your network number depends on your particular situation. If
the ISP or your network administrator assigns you a block of registered IP
addresses, follow their instructions in selecting the IP addresses and the subnet
mask.
If the ISP did not explicitly give you an IP network number, then most likely you
have a single user account and the ISP will assign you a dynamic IP address when
the connection is established. If this is the case, it is recommended that you select
a network number from 192.168.0.0 to 192.168.255.0 and you must enable the
Network Address Translation (NAT) feature of the OX253P. The Internet Assigned
Number Authority (IANA) reserved this block of addresses specifically for private
use; please do not use any other number unless you are told otherwise. Let's say
you select 192.168.1.0 as the network number; which covers 254 individual
addresses, from 192.168.1.1 to 192.168.1.254 (zero and 255 are reserved). In
other words, the first three numbers specify the network number while the last
number identifies an individual computer on that network.
Once you have decided on the network number, pick an IP address that is easy to
remember, for instance, 192.168.1.1, for your OX253P, but make sure that no
other device on your network is using that IP address.
The subnet mask specifies the network number portion of an IP address. Your
OX253P will compute the subnet mask automatically based on the IP address that
you entered. You don't need to change the subnet mask computed by the OX253P
unless you are instructed to do otherwise.
6.6.2 DHCP Setup
DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows
individual clients to obtain TCP/IP configuration at start-up from a server. You can
configure the OX253P as a DHCP server or disable it. When configured as a server,
the OX253P provides the TCP/IP configuration for the clients. If DHCP service is
disabled, you must have another DHCP server on your LAN, or else each computer
must be manually configured.
The OX253P is pre-configured with a pool of IP addresses for the DHCP clients
(DHCP Pool). See the product specifications in the appendices. Do not assign static
IP addresses from the DHCP pool to your LAN computers.
These parameters should work for the majority of installations. If your ISP gives
you explicit DNS server address(es), see Section 6.3 on page 56.
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6.6.3 LAN TCP/IP
The OX253P has built-in DHCP server capability that assigns IP addresses and
DNS servers to systems that support DHCP client capability.
The LAN parameters of the OX253P are preset in the factory with the following
values:
•IP address of 192.168.1.1 with subnet mask of 255.255.255.0 (24 bits)
•DHCP server enabled with 32 client IP addresses starting from 192.168.1.33.
These parameters should work for the majority of installations. If your ISP gives
you explicit DNS server address(es), see Section 6.3 on page 56.
6.6.4 DNS Server Address
DNS (Domain Name System) is for mapping a domain name to its corresponding
IP address and vice versa. The DNS server is extremely important because
without it, you must know the IP address of a machine before you can access it.
The DNS server addresses that you enter in the DHCP setup are passed to the
client machines along with the assigned IP address and subnet mask.
There are two ways that an ISP disseminates the DNS server addresses. The first
is for an ISP to tell a customer the DNS server addresses, usually in the form of an
information sheet, when s/he signs up. If your ISP gives you the DNS server
addresses, enter them in the DNS Server fields in DHCP Setup, otherwise, leave
them blank.
Some ISPs choose to pass the DNS servers using the DNS server extensions of
PPP IPCP (IP Control Protocol) after the connection is up. If your ISP did not give
you explicit DNS servers, chances are the DNS servers are conveyed through IPCP
negotiation. The OX253P supports the IPCP DNS server extensions through the
DNS proxy feature.
If the Primary and Secondary DNS Server fields in the LAN Setup screen are
notspecified, for instance, left as 0.0.0.0, the OX253P tells the DHCP clients that
it itself is the DNS server. When a computer sends a DNS query to the OX253P,
the OX253P forwards the query to the real DNS server learned through IPCP and
relays the response back to the computer.
Please note that DNS proxy works only when the ISP uses the IPCP DNS server
extensions. It does not mean you can leave the DNS servers out of the DHCP
setup under all circumstances. If your ISP gives you explicit DNS servers, make
sure that you enter their IP addresses in the LAN Setup screen. This way, the
OX253P can pass the DNS servers to the computers and the computers can query
the DNS server directly without the OX253P’s intervention.
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6.6.5 RIP Setup
RIP (Routing Information Protocol) allows a router to exchange routing
information with other routers. The RIP Direction field controls the sending and
receiving of RIP packets. When set to:
•Both - the OX253P will broadcast its routing table periodically and incorporate
the RIP information that it receives.
•In Only - the OX253P will not send any RIP packets but will accept all RIP
packets received.
•Out Only - the OX253P will send out RIP packets but will not accept any RIP
packets received.
•None - the OX253P will not send any RIP packets and will ignore any RIP
packets received.
The Version field controls the format and the broadcasting method of the RIP
packets that the OX253P sends (it recognizes both formats when receiving). RIP-1
is universally supported; but RIP-2 carries more information. RIP-1 is probably
adequate for most networks, unless you have an unusual network topology.
Both RIP-2B and RIP-2M sends the routing data in RIP-2 format; the difference
being that RIP-2B uses subnet broadcasting while RIP-2M uses multicasting.
6.6.6 Multicast
Traditionally, IP packets are transmitted in one of either two ways - Unicast (1
sender - 1 recipient) or Broadcast (1 sender - everybody on the network).
Multicast delivers IP packets to a group of hosts on the network - not everybody
and not just 1.
IGMP (Internet Group Multicast Protocol) is a network-layer protocol used to
establish membership in a Multicast group - it is not used to carry user data. IGMP
version 2 (RFC 2236) is an improvement over version 1 (RFC 1112) but IGMP
version 1 is still in wide use. If you would like to read more detailed information
about interoperability between IGMP version 2 and version 1, please see sections
4 and 5 of RFC 2236. The class D IP address is used to identify host groups and
can be in the range 224.0.0.0 to 239.255.255.255. The address 224.0.0.0 is not
assigned to any group and is used by IP multicast computers. The address
224.0.0.1 is used for query messages and is assigned to the permanent group of
all IP hosts (including gateways). All hosts must join the 224.0.0.1 group in order
to participate in IGMP. The address 224.0.0.2 is assigned to the multicast routers
group.
The OX253P supports both IGMP version 1 (IGMP-v1) and IGMP version 2
(IGMP-v2). At start up, the OX253P queries all directly connected networks to
gather group membership. After that, the OX253P periodically updates this
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information. IP multicasting can be enabled/disabled on the OX253P LAN and/or
WAN interfaces in the web configurator (LAN; WAN). Select None to disable IP
multicasting on these interfaces.
OX253P User’s Guide 65
CHAPTER 7
The WAN Configuration Screens
7.1 Overview
Use the ADVANCED > WAN Configuration screens to set up your OX253P’s
Wide Area Network (WAN) or Internet features.
A Wide Area Network (or WAN) links geographically dispersed locations to other
networks or the Internet. A WAN configuration can include switched and
permanent telephone circuits, terrestrial radio systems and satellite systems.
7.1.1 What You Can Do in This Chapter
•The Internet Connection screen (Section 7.2 on page 68) lets you set up your
OX253P’s Internet settings.
•The WiMAX Configuration screen (Section 7.3 on page 70) lets set up the
frequencies used by your OX253P.
•The Advanced screen (Section 7.5 on page 75) lets configure your DNS server,
RIP, Multicast and Windows Networking settings.
7.1.2 What You Need to Know
The following terms and concepts may help as you read through this chapter.
WiMAX
WiMAX (Worldwide Interoperability for Microwave Access) is the IEEE 802.16
wireless networking standard, which provides high-bandwidth, wide-range
wireless service across wireless Metropolitan Area Networks (MANs).
In a wireless MAN, a wireless-equipped computer is known either as a mobile
station (MS) or a subscriber station (SS). Mobile stations use the IEEE 802.16e
standard and are able to maintain connectivity while switching their connection
from one base station to another base station (handover) while subscriber stations
use other standards that do not have this capability (IEEE 802.16-2004, for
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example). The following figure shows an MS-equipped notebook computer MS1
moving from base station BS1’s coverage area and connecting to BS2.
Figure 17 WiMax: Mobile Station
WiMAX technology uses radio signals (around 2 to 10 GHz) to connect subscriber
stations and mobile stations to local base stations. Numerous subscriber stations
and mobile stations connect to the network through a single base station (BS), as
in the following figure.
Figure 18 WiMAX: Multiple Mobile Stations
A base station's coverage area can extend over many hundreds of meters, even
under poor conditions. A base station provides network access to subscriber
stations and mobile stations, and communicates with other base stations.
The radio frequency and bandwidth of the link between the OX253P and the base
station are controlled by the base station. The OX253P follows the base station’s
configuration.
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Authentication
When authenticating a user, the base station uses a third-party RADIUS or
Diameter server known as an AAA (Authentication, Authorization and Accounting)
server to authenticate the mobile or subscriber stations.
The following figure shows a base station using an AAA server to authenticate
mobile station MS, allowing it to access the Internet.
Figure 19 Using an AAA Server
In this figure, the dashed arrow shows the PKM (Privacy Key Management)
secured connection between the mobile station and the base station, and the solid
arrow shows the EAP secured connection between the mobile station, the base
station and the AAA server. See the WiMAX security appendix for more details.
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7.2 Internet Connection
Click ADVANCED > WAN Configuration to set up your OX253P’s Internet
settings.
Note: Not all OX253P models have all the fields shown here.
Figure 20 ADVANCED > WAN Configuration > Internet Connection
The following table describes the labels in this screen.
Table 18 ADVANCED > WAN Configuration > Internet Connection > ISP
Parameters for Internet Access
LABEL DESCRIPTION
ISP Parameters for Internet Access
User NameUse this field to enter the username associated with your Internet
access account. You can enter up to 61 printable ASCII characters.
PasswordUse this field to enter the password associated with your Internet
access account. You can enter up to 47 printable ASCII characters.
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Anonymous
Identity Enter the anonymous identity provided by your Internet Service
Provider. Anonymous identity (also known as outer identity) is used
with EAP-TTLS encryption. The anonymous identity is used to route
your authentication request to the correct authentication server, and
does not reveal your real user name. Your real user name and
password are encrypted in the TLS tunnel, and only the anonymous
identity can be seen.
Leave this field blank if your ISP did not give you an anonymous
identity to use.
PKMThis field displays the Privacy Key Management version number.
PKM provides security between the OX253P and the base station. At
the time of writing, the OX253P supports PKMv2 only. See the
WiMAX security appendix for more information.
AuthenticationThis field displays the user authentication method. Authentication is
the process of confirming the identity of a mobile station (by means
of a username and password, for example).
Check with your service provider if you are unsure of the correct
setting for your account.
Choose from the following user authentication methods:
•TTLS (Tunnelled Transport Layer Security)
•TLS (Transport Layer Security)
Note: Not all OX253Ps support TLS authentication. Check with
your service provider for details.
TTLS Inner EAPThis field displays the type of secondary authentication method.
Once a secure EAP-TTLS connection is established, the inner EAP is
the protocol used to exchange security information between the
mobile station, the base station and the AAA server to authenticate
the mobile station. See the WiMAX security appendix for more
details.
This field is available only when TTLS is selected in the
Authentication field.
The OX253P supports the following inner authentication types:
•CHAP (Challenge Handshake Authentication Protocol)
•MSCHAP (Microsoft CHAP)
•MSCHAPV2 (Microsoft CHAP version 2)
•PAP (Password Authentication Protocol)
Auth ModeSelect the authentication mode from the drop-down list box.
This field is not available in all OX253Ps. Check with your service
provider for details.
The OX253P supports the following authentication modes:
•User Only
•Device Only with Cert
•Certs and User Authentication
Table 18 ADVANCED > WAN Configuration > Internet Connection > ISP
Parameters for Internet Access (continued)
LABEL DESCRIPTION
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7.3 WiMAX Configuration
Click ADVANCED > WAN Configuration > WiMAX Configuration to set up the
frequencies used by your OX253P.
In a WiMAX network, a mobile or subscriber station must use a radio frequency
supported by the base station to communicate. When the OX253P looks for a
connection to a base station, it can search a range of frequencies.
CertificateThis is the security certificate the OX253P uses to authenticate the
AAA server. Use the TOOLS > > Trusted CAs screen to import
certificates to the OX253P.
WAN IP Address Assignment
Get
automatically
from ISP
(Default)
Select this if you have a dynamic IP address. A dynamic IP address
is not fixed; the ISP assigns you a different one each time you
connect to the Internet.
Use Fixed IP
Address A static IP address is a fixed IP that your ISP gives you. Type your
ISP assigned IP address in the IP Address field below.
IP Subnet MaskEnter a subnet mask in dotted decimal notation.
Refer to the appendicesto calculate a subnet mask If you are
implementing subnetting.
Gateway IP
Address Specify a gateway IP address (supplied by your ISP).
ApplyClick to save your changes.
ResetClick to restore your previously saved settings.
Table 18 ADVANCED > WAN Configuration > Internet Connection > ISP
Parameters for Internet Access (continued)
LABEL DESCRIPTION
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Radio frequency is measured in Hertz (Hz).
Figure 21 ADVANCED > WAN Configuration >WiMAX Configuration
The following table describes the labels in this screen.
Table 19 Radio Frequency Conversion
1 kHz = 1000 Hz
1 MHz = 1000 kHz (1000000 Hz)
1 GHz = 1000 MHz (1000000 kHz)
Table 20 ADVANCED > WAN Configuration >WiMAX Configuration
LABEL DESCRIPTION
DL Frequency /
Bandwidth These fields show the downlink frequency settings in kilohertz (kHz).
Enter values in these fields to have the OX253P scan these
frequencies for available channels in ascending numerical order.
Note: The Bandwidth field is not user-configurable; when the
OX253P finds a WiMAX connection, its frequency is
displayed in this field.
Contact your service provider for details of supported frequencies.
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7.3.1 Frequency Ranges
The following figure shows the OX253P searching a range of frequencies to find a
connection to a base station.
Figure 22 Frequency Ranges
In this figure, A is the WiMAX frequency range. “WiMAX frequency range” refers to
the entire range of frequencies the OX253P is capable of using to transmit and
receive (see the Product Specifications appendix for details).
In the figure, B shows the operator frequency range. This is the range of
frequencies within the WiMAX frequency range supported by your operator
(service provider).
The operator range is subdivided into bandwidth steps. In the figure, each C is a
bandwidth step.
The arrow D shows the OX253P searching for a connection.
Have the OX253P search only certain frequencies by configuring the downlink
frequencies. Your operator can give you information on the supported frequencies.
The downlink frequencies are points of the frequency range your OX253P searches
for an available connection. Use the Site Survey screen to set these bands. You
can set the downlink frequencies anywhere within the WiMAX frequency range. In
this example, the downlink frequencies have been set to search all of the operator
range for a connection.
ApplyClick to save your changes.
ResetClick to restore your previously saved settings.
Table 20 ADVANCED > WAN Configuration >WiMAX Configuration (continued)
LABEL DESCRIPTION
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7.3.2 Configuring Frequency Settings
You need to set the OX253P to scan one or more specific radio frequencies to find
an available connection to a WiMAX base station.
Use the WiMAX Frequency screen to define the radio frequencies to be searched
for available wireless connections. See Section 7.3.3 on page 73 for an example of
using the WiMAX Frequency screen.
Note: It may take several minutes for the OX253P to find a connection.
•The OX253P searches the DL Frequency settings in ascending numerical order,
from [1] to [9].
Note: The Bandwidth field is not user-configurable; when the OX253P finds a
WiMAX connection, its frequency is displayed in this field.
•If you enter a 0 in a DL Frequency field, the OX253P immediately moves on to
the next DL Frequency field.
•When the OX253P connects to a base station, the values in this screen are
automatically set to the base station’s frequency. The next time the OX253P
searches for a connection, it searches only this frequency. If you want the
OX253P to search other frequencies, enter them in the DL Frequency fields.
The following table describes some examples of DL Frequency settings.
7.3.3 Using the WiMAX Frequency Screen
In this example, your Internet service provider has given you a list of supported
frequencies: 2.51, 2.525, 2.6, and 2.625.
1In the DL Frequency [1] field, enter 2510000 (2510000 kilohertz (kHz) is equal
to 2.51 gigahertz).
Table 21 DL Frequency Example Settings
EXAMPLE 1 EXAMPLE 2
DL Frequency [1] 25000002500000
DL Frequency [2] 25500002550000
DL Frequency [3] 02600000
DL Frequency [4] 00
DL Frequency [5] 00
The OX253P searches at
2500000 kHz, and then
searches at 2550000 kHz
if it has not found a
connection.
The OX253P searches at 2500000 kHz
and then at 2550000 kHz if it has not
found an available connection. If it still
does not find an available connection, it
searches at 2600000 kHz.
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2In the DL Frequency [2] field, enter 2525000.
3In the DL Frequency [3] field, enter 2600000.
4In the DL Frequency [4] field, enter 2625000.
Leave the rest of the DL Frequency fields at zero. The screen appears as follows.
Figure 23 Completing the WiMAX Frequency Screen
5Click Apply. The OX253P stores your settings.
When the OX253P searches for available frequencies, it scans all frequencies from
DL Frequency [1] to DL Frequency [4]. When it finds an available connection,
the fields in this screen will be automatically set to use that frequency.
7.4 Buzzer
Click ADVANCED > WAN Configuration > Buzzer to enable or disable buzzer in
the ODU. The buzzer sounds beeps when the OX253P receives signal from the
connected base station.
Figure 24 ADVANCED > WAN Configuration > Buzzer
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The following table describes the labels in this screen.
7.5 Advanced
Click ADVANCED > WAN Configuration > Advanced to configure your DNS
server, RIP, Multicast and Windows Networking settings.
Figure 25 ADVANCED > WAN Configuration > Advanced
Table 22 ADVANCED > WAN Configuration > Buzzer
LABEL DESCRIPTION
Enable BuzzerSelect this to turn on the buzzer in the outdoor unit (ODU). You may
need to turn on the buzzer when you set up the ODU. The buzzer sounds
the number of beeps based on the signal strength (the RSSI value)
received from the base station.
•RSSI > -50: The five LEDs on the ODU light on and the buzzer sounds
five beeps regularly.
•-50 > RSSI > -60: Four of the five LEDs on the ODU light on and the
buzzer sounds four beeps regularly.
•-60 > RSSI > -70: Three of the five LEDs on the ODU light on and the
buzzer sounds three beeps regularly.
•-70 > RSSI > -80: Two of the five LEDs on the ODU light on and the
buzzer sounds two beeps regularly.
•-80 > RSSI > -90: One of the five LEDs on the ODU lights on and the
buzzer sounds one beep regularly.
•-90 > RSSI - The buzzer does not sound.
Disable BuzzerSelect this to turn the buzzer off.
ApplyClick to save your changes.
ResetClick to restore your previously saved settings.
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The following table describes the labels in this screen.
Table 23 ADVANCED > WAN Configuration > Advanced
LABEL DESCRIPTION
DNS Servers
First, Second and
Third DNS Server Select Obtainedfrom ISP if your ISP dynamically assigns DNS
server information (and the OX253P's WAN IP address). Use the
drop-down list box to select a DNS server IP address that the ISP
assigns in the field to the right.
Select UserDefined if you have the IP address of a DNS server.
Enter the DNS server's IP address in the field to the right. If you
chose UserDefined, but leave the IP address set to 0.0.0.0,
UserDefined changes to None after you click Apply. If you set a
second choice to UserDefined, and enter the same IP address, the
second UserDefined changes to None after you click Apply.
Select None if you do not want to configure DNS servers. You must
have another DHCP server on your LAN, or else the computers
must have their DNS server addresses manually configured. If you
do not configure a DNS server, you must know the IP address of a
computer in order to access it.
Multicast Setup
MulticastIGMP (Internet Group Multicast Protocol) is a network-layer
protocol used to establish membership in a multicast group. The
OX253P supports both IGMP version 1 (IGMP-v1) and IGMP-v2.
Select None to disable it.
Windows Networking (NetBIOS over TCP/IP)
Allow between LAN
and WAN Select this check box to forward NetBIOS packets from the LAN to
the WAN and from the WAN to the LAN. If your firewall is enabled
with the default policy set to block WAN to LAN traffic, you also
need to enable the default WAN to LAN firewall rule that forwards
NetBIOS traffic.
Clear this check box to block all NetBIOS packets going from the
LAN to the WAN and from the WAN to the LAN.
ApplyClick to save your changes.
ResetClick to restore your previously saved settings.
OX253P User’s Guide 77
CHAPTER 8
The NAT Configuration Screens
8.1 Overview
Use these screens to configure port forwarding and trigger ports for the OX253P.
You can also enable and disable SIP, FTP, and H.323 ALG.
Network Address Translation (NAT) maps a host’s IP address within one network
to a different IP address in another network. For example, you can use a NAT
router to map one IP address from your ISP to multiple private IP addresses for
the devices in your home network.
8.1.1 What You Can Do in This Chapter
•The General screen (Section 8.2 on page 77) lets you enable or disable NAT
and to allocate memory for NAT and firewall rules.
•The Port Forwarding screen (Section 8.3 on page 78) lets you look at the
current port-forwarding rules in the OX253P, and to enable, disable, activate,
and deactivate each one.
•The Trigger Port screen (Section 8.4 on page 82) lets you maintain trigger port
forwarding rules for the OX253P.
•The ALG screen (Section 8.5 on page 85) lets you enable and disable SIP
(VoIP), FTP (file transfer), and H.323 (audio-visual) ALG in the OX253P.
8.2 General
Click ADVANCED > NAT Configuration > General to enable or disable NAT and
to allocate memory for NAT and firewall rules.
Figure 26 ADVANCED > NAT Configuration > General
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The following table describes the labels in this screen.
8.3 Port Forwarding
A NAT server set is a list of inside (behind NAT on the LAN) servers, for example,
web or FTP, that you can make accessible to the outside world even though NAT
makes your whole inside network appear as a single machine to the outside world.
Use the ADVANCED > NAT Configuration > Port Forwarding screen to
forward incoming service requests to the server(s) on your local network. You may
enter a single port number or a range of port numbers to be forwarded, and the
local IP address of the desired server. The port number identifies a service; for
example, web service is on port 80 and FTP on port 21. In some cases, such as for
unknown services or where one server can support more than one service (for
example both FTP and web service), it might be better to specify a range of port
numbers.
In addition to the servers for specified services, NAT supports a default server. A
service request that does not have a server explicitly designated for it is forwarded
to the default server. If the default is not defined, the service request is simply
discarded.
Table 24 ADVANCED > NAT Configuration > General
LABEL DESCRIPTION
Enable Network
Address Translation Select this if you want to use port forwarding, trigger ports, or any
of the ALG.
Max NAT/Firewall
Session Per User When computers use peer to peer applications, such as file
sharing applications, they may use a large number of NAT
sessions. If you do not limit the number of NAT sessions a single
client can establish, this can result in all of the available NAT
sessions being used. In this case, no additional NAT sessions can
be established, and users may not be able to access the Internet.
Each NAT session establishes a corresponding firewall session. Use
this field to limit the number of NAT/firewall sessions each client
computer can establish through the OX253P.
If your network has a small number of clients using peer to peer
applications, you can raise this number to ensure that their
performance is not degraded by the number of NAT sessions they
can establish. If your network has a large number of users using
peer to peer applications, you can lower this number to ensure no
single client is using all of the available NAT sessions.
Apply Click to save your changes.
ResetClick to return to the previous screen without saving your
changes.
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For example, let's say you want to assign ports 21-25 to one FTP, Telnet and SMTP
server (A in the example), port 80 to another (B in the example) and assign a
default server IP address of 192.168.1.35 to a third (C in the example). You
assign the LAN IP addresses and the ISP assigns the WAN IP address. The NAT
network appears as a single host on the Internet.
Figure 27 Multiple Servers Behind NAT Example
8.3.1 Port Forwarding Options
Click ADVANCED > NAT Configuration > Port Forwarding to look at the
current port-forwarding rules in the OX253P, and to enable, disable, activate, and
deactivate each one. You can also set up a default server to handle ports not
covered by rules.
Figure 28 ADVANCED > NAT Configuration > Port Forwarding
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The following table describes the icons in this screen.
The following table describes the labels in this screen.
Table 25 Advanced> VPN Transport > Customer Interface
ICON DESCRIPTION
Edit
Click to edit this item.
Delete
Click to delete this item.
Table 26 ADVANCED > NAT Configuration > Port Forwarding
LABEL DESCRIPTION
Default Server Setup
Default Server Enter the IP address of the server to which the OX253P should forward
packets for ports that are not specified in the Port Forwarding section
below or in the TOOLS > Remote MGMT screens. Enter 0.0.0.0 if you
want the OX253P to discard these packets instead.
Port Forwarding
#The number of the item in this list.
Active Select this to enable this rule. Clear this to disable this rule.
Name This field displays the name of the rule. It does not have to be unique.
Start Port This field displays the beginning of the range of port numbers forwarded
by this rule.
End Port This field displays the end of the range of port numbers forwarded by
this rule. If it is the same as the Start Port, only one port number is
forwarded.
Server IP
Address This field displays the IP address of the server to which packet for the
selected port(s) are forwarded.
ActionClick the Edit icon to set up a port forwarding rule or alter the
configuration of an existing port forwarding rule.
Click the Delete icon to remove an existing port forwarding rule.
Apply Click to save your changes.
Reset Click to restore your previously saved settings.
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8.3.2 Port Forwarding Rule Setup
Click a port forwarding rule’s Edit icon in the ADVANCED >NAT Configuration
>Port Forwarding screen to activate, deactivate, or edit it.
Figure 29 ADVANCED > NAT Configuration > Port Forwarding > Rule Setup
The following table describes the labels in this screen.
Table 27 ADVANCED > NAT Configuration > Port Forwarding > Rule Setup
LABEL DESCRIPTION
Active Select this to enable this rule. Clear this to disable this rule.
Service Name Enter a name to identify this rule. You can use 1 - 31 printable ASCII
characters, or you can leave this field blank. It does not have to be a
unique name.
Start Port
End Port
Enter the port number or range of port numbers you want to forward to
the specified server.
To forward one port number, enter the port number in the Start Port
and End Port fields.
To forward a range of ports,
•enter the port number at the beginning of the range in the Start
Port field
•enter the port number at the end of the range in the End Port field.
Server IP
Address Enter the IP address of the server to which to forward packets for the
selected port number(s). This server is usually on the LAN.
Apply Click to save your changes.
CancelClick to return to the previous screen without saving your changes.
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8.4 Trigger Port
Some services use a dedicated range of ports on the client side and a dedicated
range of ports on the server side. With regular port forwarding you set a
forwarding port in NAT to forward a service (coming in from the server on the
WAN) to the IP address of a computer on the client side (LAN). The problem is
that port forwarding only forwards a service to a single LAN IP address. In order to
use the same service on a different LAN computer, you have to manually replace
the LAN computer's IP address in the forwarding port with another LAN
computer's IP address,
Trigger port forwarding solves this problem by allowing computers on the LAN to
dynamically take turns using the service. The OX253P records the IP address of a
LAN computer that sends traffic to the WAN to request a service with a specific
port number and protocol (a "trigger" port). When the OX253P's WAN port
receives a response with a specific port number and protocol ("incoming" port),
the OX253P forwards the traffic to the LAN IP address of the computer that sent
the request. After that computer’s connection for that service closes, another
computer on the LAN can use the service in the same manner. This way you do not
need to configure a new IP address each time you want a different LAN computer
to use the application.
Click ADVANCED > NAT Configuration > Trigger Port to maintain trigger port
forwarding rules for the OX253P.
Figure 30 ADVANCED > NAT Configuration > Trigger Port
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The following table describes the labels in this screen.
Table 28 ADVANCED > NAT Configuration > Trigger Port
LABEL DESCRIPTION
#The number of the item in this list.
Name Enter a name to identify this rule. You can use 1 - 15 printable ASCII
characters, or you can leave this field blank. It does not have to be a
unique name.
Incoming
Start Port
End Port Enter the incoming port number or range of port numbers you want to
forward to the IP address the OX253P records.
To forward one port number, enter the port number in the Start Port
and End Port fields.
To forward a range of ports,
•enter the port number at the beginning of the range in the Start
Port field
•enter the port number at the end of the range in the End Port field.
If you want to delete this rule, enter zero in the Start Port and End
Port fields.
Trigger
Start Port
End Port Enter the outgoing port number or range of port numbers that makes
the OX253P record the source IP address and assign it to the selected
incoming port number(s).
To select one port number, enter the port number in the Start Port and
End Port fields.
To select a range of ports,
•enter the port number at the beginning of the range in the Start
Port field
•enter the port number at the end of the range in the End Port field.
If you want to delete this rule, enter zero in the Start Port and End
Port fields.
Apply Click to save your changes.
ResetClick to return to the previous screen without saving your changes.
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8.4.1 Trigger Port Forwarding Example
The following is an example of trigger port forwarding. In this example, J is Jane’s
computer and S is the Real Audio server.
Figure 31 Trigger Port Forwarding Example
1Jane requests a file from the Real Audio server (port 7070).
2Port 7070 is a “trigger” port and causes the OX253P to record Jane’s computer IP
address. The OX253P associates Jane's computer IP address with the "incoming"
port range of 6970-7170.
3The Real Audio server responds using a port number ranging between 6970-7170.
4The OX253P forwards the traffic to Jane’s computer IP address.
5Only Jane can connect to the Real Audio server until the connection is closed or
times out. The OX253P times out in three minutes with UDP (User Datagram
Protocol), or two hours with TCP/IP (Transfer Control Protocol/Internet Protocol).
Two points to remember about trigger ports:
1Trigger events only happen on data that is coming from inside the OX253P and
going to the outside.
2If an application needs a continuous data stream, that port (range) will be tied up
so that another computer on the LAN can’t trigger it.
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8.5 ALG
Some applications, such as SIP, cannot operate through NAT (are NAT un-friendly)
because they embed IP addresses and port numbers in their packets’ data
payload.
Some NAT routers may include a SIP Application Layer Gateway (ALG). An
Application Layer Gateway (ALG) manages a specific protocol (such as SIP, H.323
or FTP) at the application layer.
A SIP ALG allows SIP calls to pass through NAT by examining and translating IP
addresses embedded in the data stream.
Click ADVANCED > NAT Configuration > ALG to enable and disable SIP (VoIP),
FTP (file transfer), and H.323 (audio-visual) ALG in the OX253P.
Figure 32 ADVANCED > NAT Configuration > ALG
The following table describes the labels in this screen.
Table 29 ADVANCED > NAT Configuration > ALG
LABEL DESCRIPTION
Enable SIP ALG Select this to make sure SIP (VoIP) works correctly with port-
forwarding and port-triggering rules.
Enable FTP ALG Select this to make sure FTP (file transfer) works correctly with port-
forwarding and port-triggering rules.
Enable H.323
ALG Select this to make sure H.323 (audio-visual programs, such as
NetMeeting) works correctly with port-forwarding and port-triggering
rules.
Apply Click to save your changes.
CancelClick to return to the previous screen without saving your changes.
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OX253P User’s Guide 87
CHAPTER 9
The System Configuration
Screens
9.1 Overview
Click ADVANCED > System Configuration to set up general system settings,
change the system mode, change the password, configure the DDNS server
settings, and set the current date and time.
9.1.1 What You Can Do in This Chapter
•The General screen (Section 9.2 on page 89) lets you change the OX253P’s
mode, set up its system name, domain name, idle timeout, and administrator
password.
•The Dynamic DNS screen (Section 9.3 on page 90) lets you set up the OX253P
as a dynamic DNS client.
•The Firmware screen (Section 9.4 on page 92) lets you upload new firmware to
the OX253P.
•The Configuration screen (Section 9.5 on page 93) lets you back up or restore
the configuration of the OX253P.
•The Restart screen (Section 9.6 on page 95) lets you restart your OX253P from
within the web configurator.
9.1.2 What You Need to Know
The following terms and concepts may help as you read through this chapter.
System Name
The System Name is often used for identification purposes. Because some ISPs
check this name you should enter your computer's "Computer Name".
•In Windows 2000: Click Start > Settings > Control Panel and then double-
click the System icon. Select the Network Identification tab and then click
the Properties button. Note the entry for the Computer Name field and enter
it as the System Name.
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•In Windows XP: Click Start > My Computer > View system information and
then click the Computer Name tab. Note the entry in the Full computer
name field and enter it as the OX253P System Name.
Domain Name
The Domain Name entry is what is propagated to the DHCP clients on the LAN. If
you leave this blank, the domain name obtained by DHCP from the ISP is used.
While you must enter the host name (System Name) on each individual computer,
the domain name can be assigned from the OX253P via DHCP.
DNS Server Address Assignment
Use DNS (Domain Name System) to map a domain name to its corresponding IP
address and vice versa. The DNS server is extremely important because without
it, you must know the IP address of a computer before you can access it.
The OX253P can get the DNS server addresses in the following ways:
1The ISP tells you the DNS server addresses, usually in the form of an information
sheet, when you sign up. If your ISP gives you DNS server addresses, enter them
in the DNS Server fields in the SYSTEM General screen.
2If the ISP did not give you DNS server information, leave the DNS Server fields in
the SYSTEM General screen set to 0.0.0.0 for the ISP to dynamically assign the
DNS server IP addresses.
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9.2 General
Click ADVANCED > System Configuration > General to change the OX253P’s
mode, set up its system name, domain name, idle timeout, and administrator
password.
Figure 33 ADVANCED > System Configuration > General
The following table describes the labels in this screen.
Table 30 ADVANCED > System Configuration > General
LABEL DESCRIPTION
System Setup
System NameEnter your computer's "Computer Name". This is for identification
purposes, but some ISPs also check this field. This name can be up to
30 alphanumeric characters long. Spaces are not allowed, but dashes “-
” and underscores "_" are accepted.
Domain NameEnter the domain name entry that is propagated to DHCP clients on the
LAN. If you leave this blank, the domain name obtained from the ISP is
used. Use up to 38 alphanumeric characters. Spaces are not allowed,
but dashes “-” and periods "." are accepted.
Administrator
Inactivity Timer Enter the number of minutes a management session can be left idle
before the session times out. After it times out, you have to log in
again. A value of "0" means a management session never times out, no
matter how long it has been left idle. This is not recommended. Long
idle timeouts may have security risks. The default is five minutes.
Password Setup
Old PasswordEnter the current password you use to access the OX253P.
New PasswordEnter the new password for the OX253P. You can use up to 30
characters. As you type the password, the screen displays an asterisk
(*) for each character you type.
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9.3 Dynamic DNS
Dynamic DNS allows you to update your current dynamic IP address with one or
many dynamic DNS services so that anyone can contact you (in NetMeeting, CU-
SeeMe, etc.). You can also access your FTP server or Web site on your own
computer using a domain name (for instance myhost.dhs.org, where myhost is a
name of your choice) that will never change instead of using an IP address that
changes each time you reconnect. Your friends or relatives will always be able to
call you even if they don't know your IP address.
First of all, you need to have registered a dynamic DNS account with
www.dyndns.org. This is for people with a dynamic IP from their ISP or DHCP
server that would still like to have a domain name. The Dynamic DNS service
provider will give you a password or key.
Enabling the wildcard feature for your host causes *.yourhost.dyndns.org to be
aliased to the same IP address as yourhost.dyndns.org. This feature is useful if
you want to be able to use, for example, www.yourhost.dyndns.org and still reach
your hostname.
Note: If you have a private WAN IP address, then you cannot use Dynamic DNS.
Retype to
Confirm Enter the new password again.
ApplyClick to save your changes.
ResetClick to restore your previously saved settings.
Table 30 ADVANCED > System Configuration > General (continued)
LABEL DESCRIPTION
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Click ADVANCED > System Configuration > Dynamic DNS to set up the
OX253P as a dynamic DNS client.
Figure 34 ADVANCED > System Configuration > Dynamic DNS
The following table describes the labels in this screen.
Table 31 ADVANCED > System Configuration > Dynamic DNS
LABEL DESCRIPTION
Dynamic DNS Setup
Enable Dynamic
DNS Select this to use dynamic DNS.
Service
Provider Select the name of your Dynamic DNS service provider.
Dynamic DNS
Type Select the type of service that you are registered for from your Dynamic
DNS service provider.
Host Name Enter the host name. You can specify up to two host names, separated
by a comma (",").
User Name Enter your user name.
Password Enter the password assigned to you.
Enable Wildcard
Option Select this to enable the DynDNS Wildcard feature.
Enable offline
option This field is available when CustomDNS is selected in the DDNS Type
field. Select this if your Dynamic DNS service provider redirects traffic
to a URL that you can specify while you are off line. Check with your
Dynamic DNS service provider.
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9.4 Firmware
Click ADVANCED > System Configuration > Firmware to upload new
firmware to the OX253P. Firmware files usually use the system model name with a
"*.bin" extension, such as "OX253P.bin". The upload process uses HTTP
(Hypertext Transfer Protocol) and may take up to two minutes. After a successful
upload, the system will reboot.
Contact your service provider for information on available firmware upgrades.
Note: Only use firmware for your OX253P’s specific model.
Figure 35 ADVANCED > System Configuration > Firmware
The following table describes the labels in this screen.
IP Address Update Policy
Use WAN IP
Address Select this if you want the OX253P to update the domain name with the
WAN port's IP address.
Dynamic DNS
server auto
detect IP
address
Select this if you want the DDNS server to update the IP address of the
host name(s) automatically. Select this optionwhen there are one or
more NAT routers between the OX253P and the DDNS server.
Note: The DDNS server may not be able to detect the proper IP
address if there is an HTTP proxy server between the
OX253P and the DDNS server.
Use specified IP
address Select this if you want to use the specified IP address with the host
name(s). Then, specify the IP address. Use this option if you have a
static IP address.
ApplyClick to save your changes.
ResetClick to restore your previously saved settings.
Table 31 ADVANCED > System Configuration > Dynamic DNS (continued)
LABEL DESCRIPTION
Table 32 ADVANCED > System Configuration > Firmware
LABEL DESCRIPTION
File Path Enter the location of the *.bin file you want to upload, or click
Browse... to find it. You must decompress compressed (.zip) files
before you can upload them.
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9.4.1 The Firmware Upload Process
When the OX253P uploads new firmware, the process usually takes about two
minutes. The device also automatically restarts in this time. This causes a
temporary network disconnect.
Note: Do not turn off the device while firmware upload is in progress!
After two minutes, log in again, and check your new firmware version in the
Status screen. You might have to open a new browser window to log in.
If the upload is not successful, you will be notified by error message.
Click Return to go back to the Firmware screen.
9.5 Configuration
Click ADVANCED > System Configuration > Configuration to back up or
restore the configuration of the OX253P. You can also use this screen to reset the
OX253P to the factory default settings.
Figure 36 ADVANCED > System Configuration > Configuration
Browse... Click this to find the *.bin file you want to upload.
Upload Click this to begin uploading the selected file. This may take up to two
minutes.
Note: Do not turn off the device while firmware upload is in
progress!
Table 32 ADVANCED > System Configuration > Firmware (continued)
LABEL DESCRIPTION
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The following table describes the labels in this screen.
9.5.1 The Restore Configuration Process
When the OX253P restores a configuration file, the device automatically restarts.
This causes a temporary network disconnect.
Note: Do not turn off the device while configuration file upload is in progress.
If the OX253P’s IP address is different in the configuration file you selected, you
may need to change the IP address of your computer to be in the same subnet as
that of the default management IP address (192.168.5.1). See the Quick Start
Guide or the appendices for details on how to set up your computer’s IP address.
You might have to open a new browser to log in again.
If the upload was not successful, you are notified by Configuration Upload Error
message:
Click Return to go back to the Configuration screen.
Table 33 ADVANCED > System Configuration > Configuration
LABEL DESCRIPTION
Backup Configuration
Backup Click this to save the OX253P’s current configuration to a file on your
computer. Once your device is configured and functioning properly, it is
highly recommended that you back up your configuration file before
making configuration changes. The backup configuration file is useful if
you need to return to your previous settings.
Restore Configuration
File PathEnter the location of the file you want to upload, or click Browse... to
find it.
BrowseClick this to find the file you want to upload.
UploadClick this to restore the selected configuration file.
Note: Do not turn off the device while configuration file upload is in
progress.
Back to Factory Defaults
Reset Click this to clear all user-entered configuration information and return
the OX253P to its factory defaults. There is no warning screen.
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9.6 Restart
Click ADVANCED > System Configuration > Restart to reboot the OX253P
without turning the power off.
Note: Restarting the OX253P does not affect its configuration.
Figure 37 ADVANCED > System Configuration > Restart
The following table describes the labels in this screen.
9.6.1 The Restart Process
When you click Restart, the the process usually takes about two minutes. Once
the restart is complete you can log in again.
9.7 Bridge
Click ADVANCED > System Configuration > Bridge to switch the OX253P
between the bridge or router mode. You may need the bridge mode when you
need to use VLAN applications in your network.
Figure 38 ADVANCED > System Configuration > Bridge
Table 34 ADVANCED > System Configuration > Firmware
LABEL DESCRIPTION
Restart Click this button to have the device perform a software restart. The
Power LED blinks as it restarts and the shines steadily if the restart is
successful.
Note: Wait one minute before logging back into the OX253P after a
restart.
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The following table describes the labels in this screen.
Table 35 ADVANCED > System Configuration > Bridge
LABEL DESCRIPTION
Bridge ModeSelect this to switch to the bridge mode for the OX253P.
Router ModeSelect this to switch to the router mode for the OX253P.
ApplyClick to save your change.
OX253P User’s Guide 97
CHAPTER 10
The Certificates Screens
10.1 Overview
Use the TOOLS > Certificates screens to manage public key certificates on the
OX253P.
The OX253P can use public key certificates (also sometimes called “digital IDs”) to
authenticate users. Certificates are based on public-private key pairs. A certificate
contains the certificate owner’s identity and public key. Certificates provide a way
to exchange public keys for use in authentication.
Public key certificates are used by web browsers to ensure that a secure web site
is legitimate. When a certificate authority such as VeriSign, Comodo, or Network
Solutions (to name a few) receives a certificate request from a website operator,
they confirm that the web domain and contact information in the request match
those on public record with a domain name registrar. If they match, then the
certificate is issued to the website operator, who then places it on his site to be
issued to all visiting web browsers to let them know that the site is legitimate.
10.1.1 What You Can Do in This Chapter
•The My Certificates screen (Section 10.2 on page 98) lets you generate and
export self-signed certificates or certification requests and import the OX253P’s
CA-signed certificates.
•The Trusted CAs screen (Section 10.3 on page 108) lets you display a
summary list of certificates of the certification authorities that you have set the
OX253P to accept as trusted.
10.1.2 What You Need to Know
The following terms and concepts may help as you read through this chapter.
Certificate Authorities
A Certification Authority (CA) issues certificates and guarantees the identity of
each certificate owner. There are commercial certification authorities like
CyberTrust or VeriSign and government certification authorities. You can use the
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OX253P to generate certification requests that contain identifying information and
public keys and then send the certification requests to a certification authority.
10.2 My Certificates
Click TOOLS > Certificates > My Certificates to access this screen. Use this
screen to generate and export self-signed certificates or certification requests and
import the OX253P’s CA-signed certificates.
Figure 39 TOOLS > Certificates > My Certificates
The following table describes the icons in this screen.
The following table describes the labels in this screen.
Table 36 TOOLS > Certificates > My Certificates
ICON DESCRIPTION
Edit
Click to edit this item.
Export
Click to export an item.
Delete
Click to delete this item.
Table 37 TOOLS > Certificates > My Certificates
LABEL DESCRIPTION
PKI Storage
Space in Use This bar displays the percentage of the OX253P’s PKI storage space that
is currently in use. When the storage space is almost full, you should
consider deleting expired or unnecessary certificates before adding
more certificates.
#The number of the item in this list.
NameThis field displays the name used to identify this certificate. It is
recommended that you give each certificate a unique name.
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TypeThis field displays what kind of certificate this is.
REQ represents a certification request and is not yet a valid certificate.
Send a certification request to a certification authority, which then
issues a certificate. Use the My Certificate Import screen to import
the certificate and replace the request.
SELF represents a self-signed certificate.
*SELF represents the default self-signed certificate which signs the
imported remote host certificates.
CERT represents a certificate issued by a certification authority.
SubjectThis field displays identifying information about the certificate’s owner,
such as CN (Common Name), OU (Organizational Unit or department),
O (Organization or company) and C (Country). It is recommended that
each certificate have unique subject information.
IssuerThis field displays identifying information about the certificate’s issuing
certification authority, such as a common name, organizational unit or
department, organization or company and country. With self-signed
certificates, this is the same information as in the Subject field.
Valid FromThis field displays the date that the certificate becomes applicable.
Valid ToThis field displays the date that the certificate expires. The text displays
in red and includes an Expired! message if the certificate has expired.
ActionClick the Edit icon to open a screen with an in-depth list of information
about the certificate.
Click the Export icon to save a copy of the certificate without its private
key. Browse to the location you want to use and click Save.
Click the Delete icon to remove a certificate. A window displays asking
you to confirm that you want to delete the certificate. Subsequent
certificates move up by one when you take this action.
The OX253P keeps all of your certificates unless you specifically delete
them. Uploading new firmware or default configuration file does not
delete your certificates.
You cannot delete certificates that any of the OX253P’s features are
configured to use.
ImportClick to a certificate into the OX253P.
CreateClick to go to the screen where you can have the OX253P generate a
certificate or a certification request.
RefreshClick to display the current validity status of the certificates.
Table 37 TOOLS > Certificates > My Certificates (continued)
LABEL DESCRIPTION
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10.2.1 My Certificates Create
Click TOOLS > Certificates > My Certificates and then the Create icon to open
the My Certificates Create screen. Use this screen to have the OX253P create a
self-signed certificate, enroll a certificate with a certification authority or generate
a certification request.
Figure 40 TOOLS > Certificates > My Certificates > Create
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The following table describes the labels in this screen.
Table 38 TOOLS > Certificates > My Certificates > Create
LABEL DESCRIPTION
Certificate NameType a name to identify this certificate. You can use up to 31
alphanumeric and ;‘~!@#$%^&()_+[]{}’,.=- characters.
Subject
Information Use these fields to record information that identifies the owner of
the certificate. You do not have to fill in every field, although the
Common Name is mandatory. The certification authority may add
fields (such as a serial number) to the subject information when it
issues a certificate. It is recommended that each certificate have
unique subject information.
Common Name Select a radio button to identify the certificate’s owner by IP
address, domain name or e-mail address. Type the IP address (in
dotted decimal notation), domain name or e-mail address in the
field provided. The domain name or e-mail address is for
identification purposes only and can be any string.
A domain name can be up to 255 characters. You can use
alphanumeric characters, the hyphen and periods.
An e-mail address can be up to 63 characters. You can use
alphanumeric characters, the hyphen, the @ symbol, periods and
the underscore.
Organizational UnitIdentify the organizational unit or department to which the
certificate owner belongs. You can use up to 63 characters. You can
use alphanumeric characters, the hyphen and the underscore.
OrganizationIdentify the company or group to which the certificate owner
belongs. You can use up to 63 characters. You can use alphanumeric
characters, the hyphen and the underscore.
CountryIdentify the state in which the certificate owner is located. You can
use up to 31 characters. You can use alphanumeric characters, the
hyphen and the underscore.
Key LengthSelect a number from the drop-down list box to determine how
many bits the key should use (512 to 2048). The longer the key, the
more secure it is. A longer key also uses more PKI storage space.
Enrollment OptionsThese radio buttons deal with how and when the certificate is to be
generated.
Create a self-
signed certificate Select Create a self-signed certificate to have the OX253P
generate the certificate and act as the Certification Authority (CA)
itself. This way you do not need to apply to a certification authority
for certificates.
Create a
certification
request and save it
locally for later
manual enrollment
Select Create a certification request and save it locally for
later manual enrollment to have the OX253P generate and store
a request for a certificate. Use the My Certificate Details screen to
view the certification request and copy it to send to the certification
authority.
Copy the certification request from the My Certificate Details
screen and then send it to the certification authority.
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Create a
certification
request and enroll
for a certificate
immediately online
Select Create a certification request and enroll for a
certificate immediately online to have the OX253P generate a
request for a certificate and apply to a certification authority for a
certificate.
You must have the certification authority’s certificate already
imported in the Trusted CAs screen.
When you select this option, you must select the certification
authority’s enrollment protocol and the certification authority’s
certificate from the drop-down list boxes and enter the certification
authority’s server address. You also need to fill in the Reference
Number and Key if the certification authority requires them.
Enrollment
Protocol This field applies when you select Create a certification request
and enroll for a certificate immediately online. Select the
certification authority’s enrollment protocol from the drop-down list
box.
Simple Certificate Enrollment Protocol (SCEP) is a TCP-based
enrollment protocol that was developed by VeriSign and Cisco.
Certificate Management Protocol (CMP) is a TCP-based
enrollment protocol that was developed by the Public Key
Infrastructure X.509 working group of the Internet Engineering Task
Force (IETF) and is specified in RFC 2510.
CA Server Address This field applies when you select Create a certification request
and enroll for a certificate immediately online. Enter the IP
address (or URL) of the certification authority server.
For a URL, you can use up to 511 of the following characters. a-zA-
Z0-9'()+,/:.=?;!*#@$_%-
CA CertificateThis field applies when you select Create a certification request
and enroll for a certificate immediately online. Select the
certification authority’s certificate from the CA Certificate drop-
down list box.
You must have the certification authority’s certificate already
imported in the Trusted CAs screen. Click Trusted CAs to go to
the Trusted CAs screen where you can view (and manage) the
OX253P's list of certificates of trusted certification authorities.
Request
Authentication When you select Create a certification request and enroll for a
certificate immediately online, the certification authority may
want you to include a reference number and key to identify you
when you send a certification request.
Fill in both the Reference Number and the Key fields if your
certification authority uses CMP enrollment protocol. Just the Key
field displays if your certification authority uses the SCEP enrollment
protocol.
For the reference number, use 0 to 99999999.
For the key, use up to 31 of the following characters. a-zA-Z0-
9;|`~!@#$%^&*()_+\{}':,./<>=-
Table 38 TOOLS > Certificates > My Certificates > Create
LABEL DESCRIPTION
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If you configured the My Certificate Create screen to have the OX253P enroll a
certificate and the certificate enrollment is not successful, you see a screen with a
Return button that takes you back to the My Certificate Create screen. Click
Return and check your information in the My Certificate Create screen. Make
sure that the certification authority information is correct and that your Internet
connection is working properly if you want the OX253P to enroll a certificate
online.
Apply Click to save your changes.
Cancel Click to return to the previous screen without saving your changes.
Table 38 TOOLS > Certificates > My Certificates > Create
LABEL DESCRIPTION
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10.2.2 My Certificate Edit
Click TOOLS > Certificates > My Certificates then the Edit icon to access this
screen. Use this screento view in-depth certificate information and change the
certificate’s name.
Figure 41 TOOLS > Certificates > My Certificates > Edit
The following table describes the labels in this screen.
Table 39 TOOLS > Certificates > My Certificates > Edit
LABEL DESCRIPTION
NameThis field displays the identifying name of this certificate. You can use
up to 31 alphanumeric and ;‘~!@#$%^&()_+[]{}’,.=- characters.
PropertySelect Default self-signed certificate which signs the imported
remote host certificates to use this certificate to sign the remote
host certificates you upload in the TOOLS > Certificates >Trusted
CAs screen.
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Certification PathThis field displays for a certificate, not a certification request.
Click the Refresh button to have this read-only text box display the
hierarchy of certification authorities that validate the certificate (and
the certificate itself).
If the issuing certification authority is one that you have imported as
a trusted certification authority, it may be the only certification
authority in the list (along with the certificate itself). If the certificate
is a self-signed certificate, the certificate itself is the only one in the
list. The OX253P does not trust the certificate and displays “Not
trusted” in this field if any certificate on the path has expired or been
revoked.
RefreshClick to display the certification path.
Certification Information
TypeThis field displays general information about the certificate. CA-signed
means that a Certification Authority signed the certificate. Self-signed
means that the certificate’s owner signed the certificate (not a
certification authority). “X.509” means that this certificate was
created and signed according to the ITU-T X.509 recommendation
that defines the formats for public-key certificates.
VersionThis field displays the X.509 version number. “
Serial NumberThis field displays the certificate’s identification number given by the
certification authority or generated by the OX253P.
SubjectThis field displays information that identifies the owner of the
certificate, such as Common Name (CN), Organizational Unit (OU),
Organization (O) and Country (C).
IssuerThis field displays identifying information about the certificate’s
issuing certification authority, such as Common Name, Organizational
Unit, Organization and Country.
With self-signed certificates, this is the same as the Subject Name
field.
“none” displays for a certification request.
Signature
Algorithm This field displays the type of algorithm that was used to sign the
certificate. The OX253P uses rsa-pkcs1-sha1 (RSA public-private key
encryption algorithm and the SHA1 hash algorithm). Some
certification authorities may use rsa-pkcs1-md5 (RSA public-private
key encryption algorithm and the MD5 hash algorithm).
Valid FromThis field displays the date that the certificate becomes applicable.
“none” displays for a certification request.
Valid ToThis field displays the date that the certificate expires. The text
displays in red and includes an Expired! message if the certificate has
expired. “none” displays for a certification request.
Key AlgorithmThis field displays the type of algorithm that was used to generate the
certificate’s key pair (the OX253P uses RSA encryption) and the
length of the key set in bits (1024 bits for example).
Subject
Alternative Name This field displays the certificate owner‘s IP address (IP), domain
name (DNS) or e-mail address (EMAIL).
Table 39 TOOLS > Certificates > My Certificates > Edit
LABEL DESCRIPTION
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Key UsageThis field displays for what functions the certificate’s key can be used.
For example, “DigitalSignature” means that the key can be used to
sign certificates and “KeyEncipherment” means that the key can be
used to encrypt text.
Basic ConstraintThis field displays general information about the certificate. For
example, Subject Type=CA means that this is a certification
authority’s certificate and “Path Length Constraint=1” means that
there can only be one certification authority in the certificate’s path.
This field does not display for a certification request.
MD5 FingerprintThis is the certificate’s message digest that the OX253P calculated
using the MD5 algorithm.
SHA1 FingerprintThis is the certificate’s message digest that the OX253P calculated
using the SHA1 algorithm.
Certificate in PEM
(Base-64)
Encoded Format
This read-only text box displays the certificate or certification request
in Privacy Enhanced Mail (PEM) format. PEM uses lowercase letters,
uppercase letters and numerals to convert the binary certificate into a
printable form.
You can copy and paste a certification request into a certification
authority’s web page, an e-mail that you send to the certification
authority or a text editor and save the file on a management
computer for later manual enrollment.
You can copy and paste a certificate into an e-mail to send to friends
or colleagues or you can copy and paste a certificate into a text editor
and save the file on a management computer for later distribution
(via floppy disk for example).
Apply Click to save your changes.
Cancel Click to return to the previous screen without saving your changes.
Table 39 TOOLS > Certificates > My Certificates > Edit
LABEL DESCRIPTION
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10.2.3 My Certificate Import
Click TOOLS > Certificates > My Certificates > Import to access this screen.
Use this screen to import a certificate that matches a corresponding certification
request that was generated by the OX253P. You must remove any spaces from the
certificate’s filename before you can import it.
Figure 42 TOOLS > Certificates > My Certificates > Import
The following table describes the labels in this screen.
Table 40 TOOLS > Certificates > My Certificates > Import
LABEL DESCRIPTION
File Path Type in the location of the file you want to upload in this field or click Browse
to find it.
You cannot import a certificate with the same name as a certificate that is
already in the OX253P.
Browse Click to find the certificate file you want to upload.
Apply Click to save your changes.
Cancel Click to return to the previous screen without saving your changes.
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10.3 Trusted CAs
Click TOOLS > Certificates >Trusted CAs access this screen. Use this screen
to display a summary list of certificates of the certification authorities that you
have set the OX253P to accept as trusted. The OX253P accepts any valid
certificate signed by a certification authority on this list as being trustworthy; thus
you do not need to import any certificate that is signed by one of these
certification authorities.
Figure 43 TOOLS > Certificates > Trusted CAs
The following table describes the icons in this screen.
The following table describes the labels in this screen.
Table 41 TOOLS > Certificates > Trusted CAs
ICON DESCRIPTION
Edit
Click to edit this item.
Export
Click to export an item.
Delete
Click to delete this item.
Table 42 TOOLS > Certificates > Trusted CAs
LABEL DESCRIPTION
PKI Storage
Space in Use This bar displays the percentage of the OX253P’s PKI storage space that
is currently in use. When the storage space is almost full, you should
consider deleting expired or unnecessary certificates before adding
more certificates.
#The number of the item in this list.
NameThis field displays the name used to identify this certificate.
SubjectThis field displays identifying information about the certificate’s owner,
such as CN (Common Name), OU (Organizational Unit or department),
O (Organization or company) and C (Country). It is recommended that
each certificate have unique subject information.
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IssuerThis field displays identifying information about the certificate’s issuing
certification authority, such as a common name, organizational unit or
department, organization or company and country. With self-signed
certificates, this is the same information as in the Subject field.
Valid FromThis field displays the date that the certificate becomes applicable. The
text displays in red and includes a Not Yet Valid! message if the
certificate has not yet become applicable.
Valid ToThis field displays the date that the certificate expires. The text displays
in red and includes an Expiring! or Expired! message if the certificate is
about to expire or has already expired.
CRL IssuerThis field displays Yes if the certification authority issues CRL
(Certificate Revocation Lists) for the certificates that it has issued and
you have selected the Check incoming certificates issued by this
CA against a CRL check box in the certificate’s details screen to have
the OX253P check the CRL before trusting any certificates issued by the
certification authority. Otherwise the field displays No.
ActionClick the Edit icon to open a screen with an in-depth list of information
about the certificate.
Use the Export icon to save the certificate to a computer. Click the icon
and then Save in the File Download screen. The Save As screen
opens, browse to the location that you want to use and click Save.
Click the Delete icon to remove the certificate. A window displays
asking you to confirm that you want to delete the certificate. Note that
subsequent certificates move up by one when you take this action.
ImportClick Import to open a screen where you can save the certificate of a
certification authority that you trust, from your computer to the
OX253P.
RefreshClick this button to display the current validity status of the certificates.
Table 42 TOOLS > Certificates > Trusted CAs (continued)
LABEL DESCRIPTION
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10.3.1 Trusted CA Edit
Click TOOLS > Certificates >Trusted CAs and then click the Edit icon to open
the Trusted CAs screen. Use this screen to view in-depth certificate information
and change the certificate’s name.
Figure 44 TOOLS > Certificates > Trusted CAs > Edit
The following table describes the labels in this screen.
Table 43 TOOLS > Certificates > Trusted CAs > Edit
LABEL DESCRIPTION
NameThis field displays the identifying name of this certificate. You can use
up to 31 alphanumeric and ;‘~!@#$%^&()_+[]{}’,.=- characters.
PropertySelect Default self-signed certificate which signs the imported
remote host certificates to use this certificate to sign the remote
host certificates you upload in the TOOLS > Certificates >Trusted
CAs screen.
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Certification PathThis field displays for a certificate, not a certification request.
Click the Refresh button to have this read-only text box display the
hierarchy of certification authorities that validate the certificate (and
the certificate itself).
If the issuing certification authority is one that you have imported as
a trusted certification authority, it may be the only certification
authority in the list (along with the certificate itself). If the certificate
is a self-signed certificate, the certificate itself is the only one in the
list. The OX253P does not trust the certificate and displays “Not
trusted” in this field if any certificate on the path has expired or been
revoked.
RefreshClick Refresh to display the certification path.
Certification Information
TypeThis field displays general information about the certificate. CA-signed
means that a Certification Authority signed the certificate. Self-signed
means that the certificate’s owner signed the certificate (not a
certification authority). “X.509” means that this certificate was
created and signed according to the ITU-T X.509 recommendation
that defines the formats for public-key certificates.
VersionThis field displays the X.509 version number. “
Serial NumberThis field displays the certificate’s identification number given by the
certification authority or generated by the OX253P.
SubjectThis field displays information that identifies the owner of the
certificate, such as Common Name (CN), Organizational Unit (OU),
Organization (O) and Country (C).
IssuerThis field displays identifying information about the certificate’s
issuing certification authority, such as Common Name, Organizational
Unit, Organization and Country.
With self-signed certificates, this is the same as the Subject Name
field.
“none” displays for a certification request.
Signature
Algorithm This field displays the type of algorithm that was used to sign the
certificate. The OX253P uses rsa-pkcs1-sha1 (RSA public-private key
encryption algorithm and the SHA1 hash algorithm). Some
certification authorities may use rsa-pkcs1-md5 (RSA public-private
key encryption algorithm and the MD5 hash algorithm).
Valid FromThis field displays the date that the certificate becomes applicable.
“none” displays for a certification request.
Valid ToThis field displays the date that the certificate expires. The text
displays in red and includes an Expired! message if the certificate has
expired. “none” displays for a certification request.
Key AlgorithmThis field displays the type of algorithm that was used to generate the
certificate’s key pair (the OX253P uses RSA encryption) and the
length of the key set in bits (1024 bits for example).
Subject
Alternative Name This field displays the certificate owner‘s IP address (IP), domain
name (DNS) or e-mail address (EMAIL).
Table 43 TOOLS > Certificates > Trusted CAs > Edit (continued)
LABEL DESCRIPTION
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Key UsageThis field displays for what functions the certificate’s key can be used.
For example, “DigitalSignature” means that the key can be used to
sign certificates and “KeyEncipherment” means that the key can be
used to encrypt text.
Basic ConstraintThis field displays general information about the certificate. For
example, Subject Type=CA means that this is a certification
authority’s certificate and “Path Length Constraint=1” means that
there can only be one certification authority in the certificate’s path.
This field does not display for a certification request.
MD5 FingerprintThis is the certificate’s message digest that the OX253P calculated
using the MD5 algorithm.
SHA1 FingerprintThis is the certificate’s message digest that the OX253P calculated
using the SHA1 algorithm.
Certificate in PEM
(Base-64)
Encoded Format
This read-only text box displays the certificate or certification request
in Privacy Enhanced Mail (PEM) format. PEM uses lowercase letters,
uppercase letters and numerals to convert the binary certificate into a
printable form.
You can copy and paste a certification request into a certification
authority’s web page, an e-mail that you send to the certification
authority or a text editor and save the file on a management
computer for later manual enrollment.
You can copy and paste a certificate into an e-mail to send to friends
or colleagues or you can copy and paste a certificate into a text editor
and save the file on a management computer for later distribution
(via floppy disk for example).
Apply Click to save your changes.
Cancel Click to return to the previous screen without saving your changes.
Table 43 TOOLS > Certificates > Trusted CAs > Edit (continued)
LABEL DESCRIPTION
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10.3.2 Trusted CA Import
Click TOOLS > Certificates >Trusted CAs and then click Import to open the
Trusted CA Import screen. Follow the instructions in this screen to save a
trusted certification authority’s certificate from a computer to the OX253P. The
OX253P trusts any valid certificate signed by any of the imported trusted CA
certificates.
Note: You must remove any spaces from the certificate’s filename before you can
import the certificate.
Figure 45 TOOLS > Certificates > Trusted CAs > Import
The following table describes the labels in this screen.
10.4 Technical Reference
The following section contains additional technical information about the OX253P
features described in this chapter.
Table 44 TOOLS > Certificates > Trusted CAs Import
LABEL DESCRIPTION
File Path Type in the location of the file you want to upload in this field or click Browse
to find it.
Choose... Click to find the certificate file you want to upload.
Apply Click to save your changes.
Cancel Click to return to the previous screen without saving your changes.
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10.4.1 Certificate Authorities
When using public-key cryptology for authentication, each host has two keys. One
key is public and can be made openly available. The other key is private and must
be kept secure.
These keys work like a handwritten signature (in fact, certificates are often
referred to as “digital signatures”). Only you can write your signature exactly as it
ought to look. When people know what your signature ought to look like, they can
verify whether something was signed by you, or by someone else. In the same
way, your private key “writes” your digital signature and your public key allows
people to verify whether data was signed by you, or by someone else. This
process works as follows.
1Tim wants to send a message to Jenny. He needs her to be sure that it comes from
him, and that the message content has not been altered by anyone else along the
way. Tim generates a public key pair (one public key and one private key).
2Tim keeps the private key and makes the public key openly available. This means
that anyone who receives a message seeming to come from Tim can read it and
verify whether it is really from him or not.
3Tim uses his private key to sign the message and sends it to Jenny.
4Jenny receives the message and uses Tim’s public key to verify it. Jenny knows
that the message is from Tim, and she knows that although other people may
have been able to read the message, no-one can have altered it (because they
cannot re-sign the message with Tim’s private key).
5Additionally, Jenny uses her own private key to sign a message and Tim uses
Jenny’s public key to verify the message.
The OX253P uses certificates based on public-key cryptology to authenticate users
attempting to establish a connection, not to encrypt the data that you send after
establishing a connection. The method used to secure the data that you send
through an established connection depends on the type of connection. For
example, a VPN tunnel might use the triple DES encryption algorithm.
The certification authority uses its private key to sign certificates. Anyone can then
use the certification authority’s public key to verify the certificates.
A certification path is the hierarchy of certification authority certificates that
validate a certificate. The OX253P does not trust a certificate if any certificate on
its path has expired or been revoked.
Certification authorities maintain directory servers with databases of valid and
revoked certificates. A directory of certificates that have been revoked before the
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scheduled expiration is called a CRL (Certificate Revocation List). The OX253P can
check a peer’s certificate against a directory server’s list of revoked certificates.
The framework of servers, software, procedures and policies that handles keys is
called PKI (public-key infrastructure).
10.4.1.1 Advantages of Certificates
Certificates offer the following benefits.
•The OX253P only has to store the certificates of the certification authorities that
you decide to trust, no matter how many devices you need to authenticate.
•Key distribution is simple and very secure since you can freely distribute public
keys and you never need to transmit private keys.
10.4.1.2 Self-signed Certificates
You can have the OX253P act as a certification authority and sign its own
certificates.
10.4.1.3 Factory Default Certificate
The OX253P generates its own unique self-signed certificate when you first turn it
on. This certificate is referred to in the GUI as the factory default certificate.
10.4.1.4 Certificate File Formats
Any certificate that you want to import has to be in one of these file formats:
•Binary X.509: This is an ITU-T recommendation that defines the formats for
X.509 certificates.
•PEM (Base-64) encoded X.509: This Privacy Enhanced Mail format uses
lowercase letters, uppercase letters and numerals to convert a binary X.509
certificate into a printable form.
•Binary PKCS#7: This is a standard that defines the general syntax for data
(including digital signatures) that may be encrypted. A PKCS #7 file is used to
transfer a public key certificate. The private key is not included. The OX253P
currently allows the importation of a PKS#7 file that contains a single
certificate.
•PEM (Base-64) encoded PKCS#7: This Privacy Enhanced Mail (PEM) format uses
lowercase letters, uppercase letters and numerals to convert a binary PKCS#7
certificate into a printable form.
Note: Be careful to not convert a binary file to text during the transfer process. It is
easy for this to occur since many programs use text files by default.
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10.4.2 Verifying a Certificate
Before you import a certificate into the OX253P, you should verify that you have
the correct certificate. This is especially true of trusted certificates since the
OX253P also trusts any valid certificate signed by any of the imported trusted
certificates.
10.4.2.1 Checking the Fingerprint of a Certificate on Your Computer
A certificate’s fingerprints are message digests calculated using the MD5 or SHA1
algorithms. The following procedure describes how to check a certificate’s
fingerprint to verify that you have the actual certificate.
1Browse to where you have the certificate saved on your computer.
2Make sure that the certificate has a “.cer” or “.crt” file name extension. (On some
Linux distributions, the file extension may be “.der”.) Add the file name extension
manually if the file does not have any.
Figure 46 Remote Host Certificates
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3Double-click the certificate’s icon to open the Certificate window. Click the
Details tab and scroll down to the Thumbprint Algorithm and Thumbprint
fields.
Figure 47 Certificate Details
4Use a secure method to verify that the certificate owner has the same information
in the Thumbprint Algorithm and Thumbprint fields. The secure method may
vary based on your situation. Possible examples would be over the telephone or
through an HTTPS connection.
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CHAPTER 11
The Firewall Screens
11.1 Overview
Use the TOOLS > Firewall screens to manage OX253P’s firewall security
measures.
Originally, the term firewall referred to a construction technique designed to
prevent the spread of fire from one room to another. The networking term
"firewall" is a system or group of systems that enforces an access-control policy
between two networks. It may also be defined as a mechanism used to protect a
trusted network from an untrusted network. Of course, firewalls cannot solve
every security problem.
A firewall is one of the mechanisms used to establish a network security perimeter
in support of a network security policy. It should never be the only mechanism or
method employed. For a firewall to guard effectively, you must design and deploy
it appropriately. This requires integrating the firewall into a broad information-
security policy. In addition, specific policies must be implemented within the
firewall itself.
11.1.1 What You Can Do in This Chapter
•The Firewall Setting screen (Section 11.2 on page 120) lets you configure the
basic settings for your firewall.
•The Service Setting screen (Section 11.3 on page 123) lets you enable service
blocking, set up the date and time service blocking is effective, and to maintain
the list of services you want to block.
11.1.2 What You Need to Know
The following terms and concepts may help as you read through this chapter.
About the OX253P Firewall
The OX253P firewall is a stateful inspection firewall and is designed to protect
against Denial of Service attacks when activated. The OX253P's purpose is to
allow a private Local Area Network (LAN) to be securely connected to the Internet.
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The OX253P can be used to prevent theft, destruction and modification of data, as
well as log events, which may be important to the security of your network.
The OX253P is installed between the LAN and a WiMAX base station connecting to
the Internet. This allows it to act as a secure gateway for all data passing between
the Internet and the LAN.
The OX253P has one Ethernet (LAN) port. The LAN (Local Area Network) port
attaches to a network of computers, which needs security from the outside world.
These computers will have access to Internet services such as e-mail, FTP and the
World Wide Web. However, “inbound access” is not allowed (by default) unless the
remote host is authorized to use a specific service.
11.2 Firewall Setting
This section describes firewalls and the built-in OX253P’s firewall features.
11.2.1 Firewall Rule Directions
Figure 48 Firewall Rule Directions
LAN-to-WAN rules are local network to Internet firewall rules. The default is to
forward all traffic from your local network to the Internet.
You can block certain LAN-to-WAN traffic in the Services screen (click the
Services tab). All services displayed in the Blocked Services list box are LAN-
to-WAN firewall rules that block those services originating from the LAN.
Blocked LAN-to-WAN packets are considered alerts. Alerts are “higher priority
logs” that include system errors, attacks and attempted access to blocked web
sites. Alerts appear in red in the View Log screen. You may choose to have alerts
e-mailed immediately in the Log Settings screen.
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LAN-to-LAN/OX253P means the LAN to the OX253P LAN interface. This is always
allowed, as this is how you manage the OX253P from your local computer.
WAN-to-LAN rules are Internet to your local network firewall rules. The default is
to block all traffic from the Internet to your local network.
How can you forward certain WAN to LAN traffic? You may allow traffic originating
from the WAN to be forwarded to the LAN by:
•Configuring NAT port forwarding rules.
•Configuring WAN or LAN & WAN access for services in the Remote MGMT
screens or SMT menus. When you allow remote management from the WAN,
you are actually configuring WAN-to-WAN/OX253P firewall rules. WAN-to-WAN/
OX253P firewall rules are Internet to the OX253P WAN interface firewall rules.
The default is to block all such traffic. When you decide what WAN-to-LAN
packets to log, you are in fact deciding what WAN-to-LAN and WAN-to-WAN/
OX253P packets to log.
Forwarded WAN-to-LAN packets are not considered alerts.
11.2.2 Triangle Route
When the firewall is on, your OX253P acts as a secure gateway between your LAN
and the Internet. In an ideal network topology, all incoming and outgoing network
traffic passes through the OX253P to protect your LAN against attacks.
Figure 49 Ideal Firewall Setup
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11.2.3 Firewall Setting Options
Click TOOLS > Firewall > General to configure the basic settings for your
firewall.
Figure 50 TOOLS > Firewall > General
The following table describes the labels in this screen.
Table 45 TOOLS > Firewall > General
LABEL DESCRIPTION
Enable Firewall Select this to activate the firewall. The OX253P controls access and
protects against Denial of Service (DoS) attacks when the firewall is
activated.
Bypass Triangle
Route Select this if you want to let some traffic from the WAN go directly to a
computer in the LAN without passing through the OX253P.
Max NAT/
Firewall Session
Per User
Select the maximum number of NAT rules and firewall rules the OX253P
enforces at one time. The OX253P automatically allocates memory for
the maximum number of rules, regardless of whether or not there is a
rule to enforce. This is the same number you enter in ADVANCED >
NAT Configuration > General.
Packet Direction
Log Select the situations in which you want to create log entries for firewall
events.
No Log - do not create any log entries
Log Blocked - (LAN to WAN only) create log entries when packets are
blocked
Log Forwarded - (WAN to LAN only) create log entries when packets
are forwarded
Log All - create log entries for every packet
Apply Click to save your changes.
Reset Click to restore your previously saved settings.
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11.3 Services
Click TOOLS > Firewall > Services to enable service blocking, set up the date
and time service blocking is effective, and to maintain the list of services you want
to block.
Figure 51 TOOLS > Firewall > Services
The following table describes the labels in this screen.
Table 46 TOOLS > Firewall > Services
LABEL DESCRIPTION
Service Setup
Enable Services
Blocking Select this to activate service blocking. The Schedule to Block section
controls what days and what times service blocking is actually effective,
however.
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11.4 Technical Reference
The following section contains additional technical information about the OX253P
features described in this chapter.
11.4.1 Stateful Inspection Firewall.
Stateful inspection firewalls restrict access by screening data packets against
defined access rules. They make access control decisions based on IP address and
protocol. They also "inspect" the session data to assure the integrity of the
connection and to adapt to dynamic protocols. These firewalls generally provide
the best speed and transparency; however, they may lack the granular application
level access control or caching that some proxies support. Firewalls, of one type or
another, have become an integral part of standard security solutions for
enterprises.
Available
Services This is a list of pre-defined services (destination ports) you may prohibit
your LAN computers from using. Select the port you want to block, and
click Add to add the port to the Blocked Services field.
A custom port is a service that is not available in the pre-defined
Available Services list. You must define it using the Type and Port
Number fields.
Blocked
Services This is a list of services (ports) that are inaccessible to computers on
your LAN when service blocking is effective. To remove a service from
this list, select the service, and click Delete.
Type Select TCP or UDP, based on which one the custom port uses.
Port Number Enter the range of port numbers that defines the service. For example,
suppose you want to define the Gnutella service. Select TCP type and
enter a port range of 6345-6349.
Add Click this to add the selected service in Available Services to the
Blocked Services list.
Delete Select a service in the Blocked Services, and click this to remove the
service from the list.
Clear All Click this to remove all the services in the Blocked Services list.
Schedule to Block
Day to Block Select which days of the week you want the service blocking to be
effective.
Time of Day to
Block Select what time each day you want service blocking to be effective.
Enter times in 24-hour format; for example, 3:00pm should be entered
as 15:00.
Apply Click to save your changes.
Reset Click to restore your previously saved settings.
Table 46 TOOLS > Firewall > Services (continued)
LABEL DESCRIPTION
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11.4.2 Guidelines For Enhancing Security With Your Firewall
1Change the default password via web configurator.
2Think about access control before you connect to the network in any way.
3Limit who can access your router.
4Don't enable any local service (such as telnet or FTP) that you don't use. Any
enabled service could present a potential security risk. A determined hacker might
be able to find creative ways to misuse the enabled services to access the firewall
or the network.
5For local services that are enabled, protect against misuse. Protect by configuring
the services to communicate only with specific peers, and protect by configuring
rules to block packets for the services at specific interfaces.
6Protect against IP spoofing by making sure the firewall is active.
7Keep the firewall in a secured (locked) room.
11.4.3 The “Triangle Route” Problem
A traffic route is a path for sending or receiving data packets between two
Ethernet devices. You may have more than one connection to the Internet
(through one or more ISPs). If an alternate gateway is on the LAN (and its IP
address is in the same subnet as the OX253P’s LAN IP address), the “triangle
route” (also called asymmetrical route) problem may occur. The steps below
describe the “triangle route” problem.
1A computer on the LAN initiates a connection by sending out a SYN packet to a
receiving server on the WAN.
2The OX253P reroutes the SYN packet through Gateway Aon the LAN to the WAN.
3The reply from the WAN goes directly to the computer on the LAN without going
through the OX253P.
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As a result, the OX253P resets the connection, as the connection has not been
acknowledged.
Figure 52 “Triangle Route” Problem
11.4.3.1 Solving the “Triangle Route” Problem
If you have the OX253P allow triangle route sessions, traffic from the WAN can go
directly to a LAN computer without passing through the OX253P and its firewall
protection.
Another solution is to use IP alias. IP alias allows you to partition your network
into logical sections over the same Ethernet interface. Your OX253P supports up to
three logical LAN interfaces with the OX253P being the gateway for each logical
network.
It’s like having multiple LAN networks that actually use the same physical cables
and ports. By putting your LAN and Gateway A in different subnets, all returning
network traffic must pass through the OX253P to your LAN. The following steps
describe such a scenario.
1A computer on the LAN initiates a connection by sending a SYN packet to a
receiving server on the WAN.
2The OX253Preroutes the packet to Gateway A, which is in Subnet 2.
3The reply from the WAN goes to the OX253P.
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4The OX253P then sends it to the computer on the LAN in Subnet 1.
Figure 53 IP Alias
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CHAPTER 12
Content Filter
12.1 Overview
Use the TOOLS > Content Filter screens to create and enforce policies that
restrict access to the Internet based on content
Internet content filtering allows you to create and enforce Internet access policies
tailored to their needs. Content filtering is the ability to block certain web features
or specific URL keywords. The OX253P can block web features such as ActiveX
controls, Java applets, cookies and disable web proxies. The OX253P also allows
you to define time periods and days during which the OX253P performs content
filtering.
12.1.1 What You Can Do in This Chapter
•The Filter screen (Section 12.2 on page 130) lets you set up a trusted IP
address, which web features are restricted, and which keywords are blocked
when content filtering is effective.
•The Schedule screen (Section 12.3 on page 132) lets you schedule content
filtering.
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12.2 Filter
Click TOOLS > Content Filter > Filter to set up a trusted IP address, which web
features are restricted, and which keywords are blocked when content filtering is
effective.
Figure 54 TOOLS > Content Filter > Filter
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The following table describes the labels in this screen.
Table 47 TOOLS > Content Filter > Filter
LABEL DESCRIPTION
Trusted IP Setup
Trusted
Computer IP
Address
You can allow a specific computer to access all Internet resources
without the restrictions you set in these screens. Enter the IP address of
the trusted computer.
Restrict Web
Features Select the web features you want to disable. If a user downloads a page
with a restricted feature, that part of the web page appears blank or
grayed out.
ActiveX - This is a tool for building dynamic and active Web pages and
distributed object applications. When you visit an ActiveX Web site,
ActiveX controls are downloaded to your browser, where they remain in
case you visit the site again.
Java - This is used to build downloadable Web components or Internet
and intranet business applications of all kinds.
Cookies - This is used by Web servers to track usage and to provide
service based on ID.
Web Proxy - This is a server that acts as an intermediary between a
user and the Internet to provide security, administrative control, and
caching service. When a proxy server is located on the WAN, it is
possible for LAN users to avoid content filtering restrictions.
Keyword Blocking
Enable URL
Keyword
Blocking
Select this if you want the OX253P to block Web sites based on words in
the web site address. For example, if you block the keyword bad,http:/
/www.website.com/bad.html is blocked.
Keyword Type a keyword you want to block in this field. You can use up to 128
printable ASCII characters. There is no wildcard character, however.
Add Click this to add the specified Keyword to the Keyword List. You can
enter up to 128 keywords.
Keyword List This field displays the keywords that are blocked when Enable URL
Keyword Blocking is selected. To delete a keyword, select it, click
Delete, and click Apply.
Delete Click Delete to remove the selected keyword in the Keyword List. The
keyword disappears after you click Apply.
Clear All Click this button to remove all of the keywords in the Keyword List.
Denied Access
Message Enter the message that is displayed when the OX253P’s content filter
feature blocks access to a web site.
Apply Click to save your changes.
Reset Click to restore your previously saved settings.
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12.3 Schedule
Click TOOLS > Content Filter > Schedule to schedule content filtering.
Figure 55 TOOLS > Content Filter > Schedule
The following table describes the labels in this screen.
Table 48 TOOLS > Content Filter > Schedule
LABEL DESCRIPTION
Day to Block Select which days of the week you want content filtering to be effective.
Time of Day to
Block Select what time each day you want content filtering to be effective.
Enter times in 24-hour format; for example, 3:00pm should be entered
as 15:00.
Apply Click to save your changes.
Reset Click to restore your previously saved settings.
OX253P User’s Guide 133
CHAPTER 13
The Remote Management
Screens
13.1 Overview
Use the TOOLS > Remote Management screens to control which computers can
use which services to access the OX253P on each interface.
Remote management allows you to determine which services/protocols can access
which OX253P interface (if any) from which computers.
You may manage your OX253P from a remote location via:
To disable remote management of a service, select Disable in the corresponding
Server Access field.
You may only have one remote management session running at a time. The
OX253P automatically disconnects a remote management session of lower priority
when another remote management session of higher priority starts. The priorities
for the different types of remote management sessions are as follows.
1Telnet
2HTTP
13.1.1 What You Can Do in This Chapter
•The WWW screen (Section 13.2 on page 135) lets you control HTTP access to
your OX253P.
•The Telnet screen (Section 13.3 on page 136) lets you control Telnet access to
your OX253P.
•The FTP screen (Section 13.4 on page 136) lets you control FTP access to your
OX253P.
Table 49 Remote Management
•Internet (WAN only) •ALL (LAN and WAN)
•LAN only •Neither (Disable).
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•The SNMP screen (Section 13.5 on page 137) lets you control SNMP access to
your OX253P.
•The DNS screen (Section 13.6 on page 140) lets you control DNS access to your
OX253P.
•The Security screen (Section 13.7 on page 141) lets you control how your
OX253P responds to other types of requests.
•The CWMP-TR069 screen (Section 13.8 on page 142) lets you configure the
OX253P’s auto-configuration and dynamic service configuration options.
13.1.2 What You Need to Know
The following terms and concepts may help as you read through this chapter.
Remote Management Limitations
Remote management over LAN or WAN will not work when:
1A filter in SMT menu 3.1 (LAN) or in menu 11.5 (WAN) is applied to block a Telnet,
FTP or Web service.
2You have disabled that service in one of the remote management screens.
3The IP address in the Secured Client IP field does not match the client IP
address. If it does not match, the OX253P will disconnect the session immediately.
4There is already another remote management session with an equal or higher
priority running. You may only have one remote management session running at
one time.
Remote Management and NAT
When NAT is enabled:
•Use the OX253P’s WAN IP address when configuring from the WAN.
•Use the OX253P’s LAN IP address when configuring from the LAN.
System Timeout
There is a default system management idle timeout of five minutes (three
hundred seconds). The OX253P automatically logs you out if the management
session remains idle for longer than this timeout period. The management session
does not time out when a statistics screen is polling. You can change the timeout
period in the Maintenance > System > General screen.
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SNMP
Simple Network Management Protocol (SNMP) is a protocol used for exchanging
management information between network devices. SNMP is a member of the
TCP/IP protocol suite. Your OX253P supports SNMP agent functionality, which
allows a manager station to manage and monitor the OX253P through the
network. The OX253P supports SNMP version one (SNMPv1) and version two
(SNMPv2). The next figure illustrates an SNMP management operation.
Note: SNMP is only available if TCP/IP is configured.
13.2 WWW
Click TOOLS > Remote Management > WWW to control HTTP access to your
OX253P.
Figure 56 TOOLS > Remote Management > WWW
The following table describes the labels in this screen.
Table 50 TOOLS > Remote Management > WWW
LABEL DESCRIPTION
Server Port Enter the port number this service can use to access the OX253P. The
computer must use the same port number.
Server Access Select the interface(s) through which a computer may access the
OX253P using this service.
Secured Client
IP Address Select All to allow any computer to access the OX253P using this
service.
Select Selected to only allow the computer with the IP address that
you specify to access the OX253P using this service.
Apply Click to save your changes.
Reset Click to restore your previously saved settings.
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13.3 Telnet
Click TOOLS > Remote Management > Telnet to control Telnet access to your
OX253P.
Figure 57 TOOLS > Remote Management > Telnet
The following table describes the labels in this screen.
13.4 FTP
Click TOOLS > Remote Management > FTP to control FTP access to your
OX253P.
Figure 58 TOOLS > Remote Management > FTP
Table 51 TOOLS > Remote Management > Telnet
LABEL DESCRIPTION
Server Port Enter the port number this service can use to access the OX253P. The
computer must use the same port number.
Server Access Select the interface(s) through which a computer may access the
OX253P using this service.
Secured Client
IP Address Select All to allow any computer to access the OX253P using this
service.
Select Selected to only allow the computer with the IP address that
you specify to access the OX253P using this service.
Apply Click to save your changes.
Reset Click to restore your previously saved settings.
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The following table describes the labels in this screen.
13.5 SNMP
An SNMP managed network consists of two main types of component: agents and
a manager.
Figure 59 SNMP Management Model
An agent is a management software module that resides in a managed device (the
OX253P). An agent translates the local management information from the
managed device into a form compatible with SNMP. The manager is the console
through which network administrators perform network management functions. It
executes applications that control and monitor managed devices.
Table 52 TOOLS > Remote Management > FTP
LABEL DESCRIPTION
Server Port Enter the port number this service can use to access the OX253P. The
computer must use the same port number.
Server Access Select the interface(s) through which a computer may access the
OX253P using this service.
Secured Client
IP Address Select All to allow any computer to access the OX253P using this
service.
Select Selected to only allow the computer with the IP address that
you specify to access the OX253P using this service.
Apply Click to save your changes.
Reset Click to restore your previously saved settings.
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The managed devices contain object variables/managed objects that define each
piece of information to be collected about a device. Examples of variables include
such as number of packets received, node port status etc. A Management
Information Base (MIB) is a collection of managed objects. SNMP allows a
manager and agents to communicate for the purpose of accessing these objects.
The OX253P supports MIB II that is defined in RFC-1213 and RFC-1215. The focus
of the MIBs is to let administrators collect statistical data and monitor status and
performance.
SNMP itself is a simple request/response protocol based on the manager/agent
model. The manager issues a request and the agent returns responses using the
following protocol operations:
•Get - Allows the manager to retrieve an object variable from the agent.
•GetNext - Allows the manager to retrieve the next object variable from a table
or list within an agent. In SNMPv1, when a manager wants to retrieve all
elements of a table from an agent, it initiates a Get operation, followed by a
series of GetNext operations.
•Set - Allows the manager to set values for object variables within an agent.
•Trap - Used by the agent to inform the manager of some events.
13.5.1 SNMP Traps
The OX253P sends traps to the SNMP manager when any of the following events
occurs:
Table 53 SNMP Traps
TRAP # TRAP NAME DESCRIPTION
0coldStart (defined in
RFC-1215)A trap is sent after booting (power on).
1warmStart (defined in
RFC-1215)A trap is sent after booting (software reboot).
4authenticationFailure
(defined in RFC-1215)A trap is sent to the manager when receiving any
SNMP get or set requirements with the wrong
community (password).
6whyReboot A trap is sent with the reason of restart before
rebooting when the system is going to restart (warm
start).
6a For intentional reboot: A trap is sent with the message "System reboot by
user!" if reboot is done intentionally, (for example,
download new files, CI command "sys reboot", etc.).
6b For fatal error: A trap is sent with the message of the fatal code if the
system reboots because of fatal errors.
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13.5.2 SNMP Options
Click TOOLS > Remote Management > SNMP to access this screen. Use SNMP
options to control SNMP access to your OX253P.
Figure 60 TOOLS > Remote Management > SNMP
The following table describes the labels in this screen.
Table 54 TOOLS > Remote Management > SNMP
LABEL DESCRIPTION
SNMP Configuration
Get Community Enter the Get Community, which is the password for the incoming
Get and GetNext requests from the management station. The default
is public and allows all requests.
Set Community Enter the Set community, which is the password for incoming Set
requests from the management station. The default is public and
allows all requests.
Trap Community Enter the trap community, which is the password sent with each trap
to the SNMP manager. The default is public and allows all requests.
Trap Destination Enter the IP address of the station to send your SNMP traps to.
SNMP
Port You may change the server port number for a service if needed,
however you must use the same port number in order to use that
service for remote management.
Access Status Select the interface(s) through which a computer may access the
OX253P using this service.
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13.6 DNS
Click TOOLS > Remote Management > DNS to access this screen. Use this
screen to control DNS access to your OX253P.
Figure 61 TOOLS > Remote Management > DNS
The following table describes the labels in this screen.
Secured Client IP A secured client is a “trusted” computer that is allowed to
communicate with the OX253P using this service.
Select All to allow any computer to access the OX253P using this
service.
Choose Selected to just allow the computer with the IP address that
you specify to access the OX253P using this service.
Apply Click to save your changes.
Reset Click to restore your previously saved settings.
Table 54 TOOLS > Remote Management > SNMP (continued)
LABEL DESCRIPTION
Table 55 TOOLS > Remote Management > DNS
LABEL DESCRIPTION
Server Port This field is read-only. This field displays the port number this service
uses to access the OX253P. The computer must use the same port
number.
Server Access Select the interface(s) through which a computer may access the
OX253P using this service.
Secured Client
IP Address Select All to allow any computer to access the OX253P using this
service.
Select Selected to only allow the computer with the IP address that
you specify to access the OX253P using this service.
Apply Click to save your changes.
Reset Click to restore your previously saved settings.
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13.7 Security
Click TOOLS > Remote Management > Security to access this screen. Use this
screen to control how your OX253P responds to other types of requests.
Figure 62 TOOLS > Remote Management > Security
The following table describes the labels in this screen.
Table 56 TOOLS > Remote Management > Security
LABEL DESCRIPTION
Respond to Ping
on Select the interface(s) on which the OX253P should respond to
incoming ping requests.
•Disable - the OX253P does not respond to any ping requests.
•LAN - the OX253P only responds to ping requests received from the
LAN.
•WAN - the OX253P only responds to ping requests received from
the WAN.
•LAN & WAN - the OX253P responds to ping requests received from
the LAN or the WAN.
Do not respond
to requests for
unauthorized
services
Select this to prevent outsiders from discovering your OX253P by
sending requests to unsupported port numbers. If an outside user
attempts to probe an unsupported port on your OX253P, an ICMP
response packet is automatically returned. This allows the outside user
to know the OX253P exists. Your OX253P supports anti-probing, which
prevents the ICMP response packet from being sent. This keeps
outsiders from discovering your OX253P when unsupported ports are
probed.
If you clear this, your OX253P replies with an ICMP Port Unreachable
packet for a port probe on unused UDP ports and with a TCP Reset
packet for a port probe on unused TCP ports.
Apply Click to save your changes.
Reset Click to restore your previously saved settings.
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13.8 CWMP-TR069
CWMP-TR069 is an abbreviation of “CPE WAN Management Protocol - Technical
Reference 069”, a protocol designed to facilitate the remote management of
Customer Premise Equipement (CPE), such as the OX253P. It can be managed
over a WAN by means of an Auto Configuration Server (ACS). CWMP-TR069 is
based on sending Remote Procedure Calls (RPCs) between the ACS and the client
device. RPCs are sent in Extensible Markup Language (XML) format over HTTP or
HTTPS.
An administrator can use an ACS to remotely set up the OX253P, modify its
settings, perform firmware upgrades, and monitor and diagnose it. In order to do
so, you must enable the CWMP-TR069 feature on your OX253P and then configure
it appropriately. (The ACS server which it will use must also be configured by its
administrator.)
Figure 63 CWMP-TR069 Example
In this example, the OX253P receives data from at least 3 sources: A SIP server
for handling voice calls, an HTTP server for handling web services, and an ACS, for
configuring the OX253P remotely. All three servers are owned and operated by the
client’s Internet Service Provider. However, without the configuration settings from
the ACS, the OX253P cannot access the other two servers. Once the OX253P
receives its configuration settings and implements them, it can connect to the
other servers. If the settings change, it will once again be unable to connect until
it receives its updates from the ACS.
The OX253P can be configured to periodically check for updates from the auto-
configuration server so that the end user need not be worried about it.
SIP
ACS
HTTP
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Click TOOLS > Remote Management > CWMP-TR069 to access this screen.
Use this screen to open OX253P’s auto-configuration and dynamic service
configuration options.
Figure 64 TOOLS > Remote Management > CWMP-TR069
The following table describes the labels in this screen.
Table 57 TOOLS > Remote Management > CWMP-TR069
LABEL DESCRIPTION
Active Select this option to turn on the OX253P’s CWMP-TR069 feature.
Note: If this feature is not enabled then the OX253P cannot be
managed remotely.
ACS URL Enter the URL or IP address of the auto-configuration server.
User Name Enter the user name sent when the OX253P connects to the ACS and
which is used for authentication.
You can enter up to 31 alphanumeric characters (a-z, A-Z, 0-9) and
underscores but spaces are not allowed.
Password Enter the password sent when the OX253P connects to an ACS and
which is used for authentication.
You can enter up to 31 alphanumeric characters (a-z, A-Z, 0-9) and
underscores but spaces are not allowed.
Connection
Request
User Name
Enter the connection request user name that the ACS must send to the
OX253P when it requests a connection.
You can enter up to 31 alphanumeric characters (a-z, A-Z, 0-9) and
underscores but spaces are not allowed.
Note: This must be provided by the ACS administrator.
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Connection
Request
Password
Enter the connection request password that the ACS must send to the
OX253P when it requests a connection.
You can enter up to 31 alphanumeric characters (a-z, A-Z, 0-9) and
underscores but spaces are not allowed.
Note: This must be provided by the ACS administrator.
Periodic Inform
Enable Select thisto allow the OX253P to periodically connect to the ACS and
check for configuration updates.
If you do not enable this feature then the OX253P can only be updated
automatically when the ACS initiates contact with it and if you selected
the Active checkbox on this screen.
Periodic
Inform
Interval
Enter the time interval (in seconds) at which the OX253P connects to
the auto-configuration server.
Periodic
Inform Time Enter a time interval that the OX253P will trigger a periodic inform
interval. This works in tandem with the Periodic Inform Interval and
is not mutually exclusive of it.
The Periodic Inform Time must be in the following format: yyyy-mm-
ddThh:mm:ss where yyyy is a four digit year (“2009”), mm is a two
digit month (01~12), dd is a two digit day (01~28), hh is a two-digit
hour in 24-hour format (01~24), mm is a two digit minutes value (01-
60) and ss is a two digit seconds value (01-60).
Note: You must separate the day information from the hour
information with a “T”.
This feature gives the OX253P abaseline from which to begin
calculating when each periodic inform happens.
If the inform time is set for some point in the past, the OX253P
interpolates the inform interval forward to the current time and begins
its periodic inform at the appropriate time based on this interpolation.
If the inform time is set for some point in the future, then the OX253P
interpolates backwards to the current time and actually begins at the
appropriate time based on this interpolation.
Apply Click to save your changes.
Reset Click to restore your previously saved settings.
Table 57 TOOLS > Remote Management > CWMP-TR069
LABEL DESCRIPTION
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CHAPTER 14
QoS
14.1 Overview
Quality of Service (QoS) refers to both a network’s ability to deliver data with
minimum delay, and the networking methods used to control the use of
bandwidth. Without QoS, all traffic data is equally likely to be dropped when the
network is congested. This can cause a reduction in network performance and
make the network inadequate for time-critical application such as video-on-
demand.
14.2 General
Click TOOLS > QoS to open the screen as shown next. Use this screen to enable
or disable QoS.
Figure 65 QoS > General
The following table describes the labels in this screen.
Table 58 TOOLS > Remote Management > Security
LABEL DESCRIPTION
Active QoS Select this to enable QoS for the OX253P. Selecting this may improve
network performance, especially if you are using VoIP applications or
are playing online video games.
Apply Click to save your changes.
Reset Click to restore your previously saved settings.
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14.3 Class Setup
Use this screen to add, edit or delete QoS classifiers. A classifier groups traffic into
data flows according to specific criteria such as the source address, destination
address, source port number, destination port number or incoming interface. For
example, you can configure a classifier to select traffic from the same protocol
port (such as Telnet) to form a flow.
You can give different priorities to traffic that the OX253P forwards out through
the WAN interface. Give high priority to voice and video to make them run more
smoothly. Similarly, give low priority to many large file downloads so that they do
not reduce the quality of other applications.
Click TOOLS > QoS > ClassSetup to open the following screen.
Figure 66 QoS > Class Setup
The following table describes the labels in this screen.
Table 59 QoS Class Setup
LABEL DESCRIPTION
Create New Class Clickthis link to create a new class.
#This field displays the index number of the class.
Active This field indicates whether the QoS class is enabled or not.
Name This field indicates the name of the class.
Interface This field indicates the Ethernet port on which traffic is being
monitored and prioritized.
DSCP This field indicates the Differentiated Services Code Point (DSCP)
value for the associated class.
Class Index This field indicates the index for this QoS class. Classes are
implemented based on index number, from lowest to highest.
Action Click the Edit icon to go to the screen where you can edit the rule.
Click the Delete icon to delete an existing rule. Note that subsequent
rules move up by one when you take this action.
Apply Click this button to save your changes back to the OX253P.
Cancel Click this button to begin configuring this screen afresh.
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14.3.1 Class Configuration
Click the Create New Class link or the edit icon next to a non-default class entry
in the Class Setup screen to configure a classifier.
Figure 67 QoS > Class Setup > Create New Class
The following table describes the labels in this screen.
Table 60 Create New Class
LABEL DESCRIPTION
Class Configuration
Active Select this to make a class active.
Index Enter an index number for the class. Similar classes are processed in
order of index number, from lowest to highest.
Name Enter a descriptive name of up to 20 printable English keyboard
characters, including spaces.
Interface Select an interface to which the class will apply:
•To WAN - The class is applied to all packets incoming from the
WAN (Wide Area Network).
•To LAN - The class is applied to all packets outgoing from the LAN
(Local Area Network).
DSCP Enter the Differentiated Services Code Point (DSCP) value (0~63) for
the traffic matching the class criteria. The higher the value, the higher
the priority. Lower-priority packets may be dropped if the total traffic
exceeds the capacity of the network.
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Filter Configuration
Use this section to define traffic to which this class will apply. The logical relationship of
the following parameters is “AND”. Select Exclude next to a parameter to not apply the
class to the traffic matching the criteria.
Source
Address
Subnet Mask Enter a source IP address and the subnet mask for the criteria.
Port Range Enter a port range on the source host for the criteria.
Destination
Address
Subnet Mask Enter a destination IP address and the subnet mask for the criteria.
Port Range Enter a port range on the destination host for the criteria.
Others
Service Select the traffic type of a service (SIP,FTP or H.323) to which this
class will apply.
Protocol Select TCP or UDP to specifiy the traffic type to which the class will
apply. You can also select User Defined and enter the number of a
protocol.
Apply Click this button to save your changes back to the OX253P.
Cancel Click this button to begin configuring this screen afresh.
Table 60 Create New Class (continued)
LABEL DESCRIPTION
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CHAPTER 15
The Logs Screens
15.1 Overview
Use the TOOLS > Logs screens to look at log entries and alerts and to configure
the OX253P’s log and alert settings.
For a list of log messages, see Section 15.4 on page 155.
15.1.1 What You Can Do in This Chapter
•The View Logs screen (Section 15.2 on page 151) lets you look at log entries
and alerts.
•The Log Settings screen (Section 15.3 on page 153) lets you configure where
the OX253P sends logs and alerts, the schedule for sending logs, and which logs
and alerts are sent or recorded.
15.1.2 What You Need to Know
The following terms and concepts may help as you read through this chapter.
Alerts
An alert is a type of log that warrants more serious attention. Some categories
such as System Errors consist of both logs and alerts.
Syslog Logs
There are two types of syslog: event logs and traffic logs.
The device generates an event log when a system event occurs, for example,
when a user logs in or the device is under attack. The device generates a traffic
log when a "session" is terminated.
A traffic log summarizes the session's type, when it started and stopped the
amount of traffic that was sent and received and so on. An external log analyzer
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can reconstruct and analyze the traffic flowing through the device after collecting
the traffic logs.
The following table shows RFC-2408 ISAKMP payload types that the log displays.
Please refer to the RFC for detailed information on each type.
Table 61 Syslog Logs
LOG MESSAGE DESCRIPTION
Event Log: <Facility*8 +
Severity>Mon dd hr:mm:ss
hostname src="<srcIP:srcPort>"
dst="<dstIP:dstPort>"
msg="<msg>" note="<note>"
devID="<mac address>"
cat="<category>"
This message is sent by the system ("RAS" displays
as the system name if you haven’t configured one)
when the router generates a syslog. The facility is
defined in the Log Settings screen. The severity is
the log’s syslog class. The definition of messages
and notes are defined in the various log charts
throughout this appendix. The “devID” is the MAC
address of the router’s LAN port. The “cat” is the
same as the category in the router’s logs.
Traffic Log: <Facility*8 +
Severity>Mon dd hr:mm:ss
hostname src="<srcIP:srcPort>"
dst="<dstIP:dstPort>"
msg="Traffic Log"
note="Traffic Log" devID="<mac
address>" cat="Traffic Log"
duration=seconds
sent=sentBytes
rcvd=receiveBytes
dir="<from:to>"
protoID=IPProtocolID
proto="serviceName"
trans="IPSec/Normal"
This message is sent by the device when the
connection (session) is closed. The facility is defined
in the Log Settings screen. The severity is the traffic
log type. The message and note always display
"Traffic Log". The "proto" field lists the service
name. The "dir" field lists the incoming and
outgoing interfaces ("LAN:LAN", "LAN:WAN",
"LAN:DEV" for example).
Table 62 RFC-2408 ISAKMP Payload Types
LOG DISPLAY PAYLOAD TYPE
SA Security Association
PROP Proposal
TRANS Transform
KE Key Exchange
ID Identification
CER Certificate
CER_REQ Certificate Request
HASH Hash
SIG Signature
NONCE Nonce
NOTFY Notification
DEL Delete
VID Vendor ID
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15.2 View Logs
Click TOOLS > Logs > View Log to access this screen. Use this screen to look at
log entries and alerts. Alerts are written in red.
Figure 68 TOOLS > Logs > View Logs
Click a column header to sort log entries in descending (later-to-earlier) order.
Click again to sort in ascending order. The small triangle next to a column header
indicates how the table is currently sorted (pointing downward is descending;
pointing upward is ascending).
The following table describes the labels in this screen.
Table 63 TOOLS > Logs > View Logs
LABEL DESCRIPTION
Display Select a category whose log entries you want to view. To view all logs,
select All Logs. The list of categories depends on what log categories
are selected in the Log Settings page.
Email Log Now Click this to send the log screen to the e-mail address specified in the
Log Settings page.
Refresh Click to renew the log screen.
Clear Log Click to clear all the log entries, regardless of what is shown on the log
screen.
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#The number of the item in this list.
Time This field displays the time the log entry was recorded.
Message This field displays the reason for the log entry. See Section 15.4 on
page 155.
Source This field displays the source IP address and the port number of the
incoming packet. In many cases, some or all of this information may
not be available.
Destination This field lists the destination IP address and the port number of the
incoming packet. In many cases, some or all of this information may
not be available.
Note This field displays additional information about the log entry.
Table 63 TOOLS > Logs > View Logs (continued)
LABEL DESCRIPTION
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15.3 Log Settings
Click TOOLS > Logs > Log Settings to configure where the OX253P sends logs
and alerts, the schedule for sending logs, and which logs and alerts are sent or
recorded.
Figure 69 TOOLS > Logs > Log Settings
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The following table describes the labels in this screen.
Table 64 TOOLS > Logs > Log Settings
LABEL DESCRIPTION
E-mail Log Settings
Mail Server Enter the server name or the IP address of the mail server the OX253P
should use to e-mail logs and alerts. Leave this field blank if you do not
want to send logs or alerts by e-mail.
Mail Subject Enter the subject line used in e-mail messages the OX253P sends.
Send Log to Enter the e-mail address to which log entries are sent by e-mail. Leave
this field blank if you do not want to send logs by e-mail.
Send Alerts to Enter the e-mail address to which alerts are sent by e-mail. Leave this
field blank if you do not want to send alerts by e-mail.
Log Schedule Select the frequency with which the OX253P should send log messages
by e-mail.
•Daily
•Weekly
•Hourly
•When Log is Full
•None.
If the Weekly or the Daily option is selected, specify a time of day
when the E-mail should be sent. If the Weekly option is selected, then
also specify which day of the week the E-mail should be sent. If the
When Log is Full option is selected, an alert is sent when the log fills
up. If you select None, no log messages are sent.
Day for Sending
Log This field is only available when you select Weekly in the Log
Schedule field.
Select which day of the week to send the logs.
Time for
Sending Log This field is only available when you select Daily or Weekly in the Log
Schedule field.
Enter the time of day in 24-hour format (for example 23:00 equals
11:00 pm) to send the logs.
Clear log after
sending mail Select this to clear all logs and alert messages after logs are sent by e-
mail.
Syslog Logging
Active Select this to enable syslog logging.
Syslog Server
IP Address Enter the server name or IP address of the syslog server that logs the
selected categories of logs.
Log Facility Select a location. The log facility allows you to log the messages in
different files in the syslog server. See the documentation of your syslog
for more details.
Active Log and Alert
Log Select the categories of logs that you want to record.
Send
immediate alert Select the categories of alerts that you want the OX253P to send
immediately.
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15.4 Log Message Descriptions
The following tables provide descriptions of example log messages.
Apply Click to save your changes.
Cancel Click to return to the previous screen without saving your changes.
Table 64 TOOLS > Logs > Log Settings
LABEL DESCRIPTION
Table 65 System Error Logs
LOG MESSAGE DESCRIPTION
WAN connection is down. The WAN connection is down. You cannot access the
network through this interface.
%s exceeds the max.
number of session per
host!
This attempt to create a NAT session exceeds the
maximum number of NAT session table entries allowed to
be created per host.
Table 66 System Maintenance Logs
LOG MESSAGE DESCRIPTION
Time calibration is
successful The device has adjusted its time based on information
from the time server.
Time calibration failed The device failed to get information from the time
server.
WAN interface gets IP: %s The WAN interface got a new IP address from the
DHCP or PPPoE server.
DHCP client gets %s A DHCP client got a new IP address from the DHCP
server.
DHCP client IP expired A DHCP client's IP address has expired.
DHCP server assigns %s The DHCP server assigned an IP address to a client.
Successful WEB login Someone has logged on to the device's web
configurator interface.
WEB login failed Someone has failed to log on to the device's web
configurator interface.
TELNET Login Successfully Someone has logged on to the router via telnet.
TELNET Login Fail Someone has failed to log on to the router via telnet.
Successful FTP login Someone has logged on to the device via ftp.
FTP login failed Someone has failed to log on to the device via ftp.
NAT Session Table is Full! The maximum number of NAT session table entries
has been exceeded and the table is full.
Time initialized by Daytime
Server The device got the time and date from the Daytime
server.
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Time initialized by Time
server The device got the time and date from the time
server.
Time initialized by NTP
server The device got the time and date from the NTP server.
Connect to Daytime server
fail The device was not able to connect to the Daytime
server.
Connect to Time server fail The device was not able to connect to the Time
server.
Connect to NTP server fail The device was not able to connect to the NTP server.
Too large ICMP packet has
been dropped The device dropped an ICMP packet that was too
large.
Configuration Change: PC =
0x%x, Task ID = 0x%x The device is saving configuration changes.
Table 67 Access Control Logs
LOG MESSAGE DESCRIPTION
Firewall default policy: [ TCP |
UDP | IGMP | ESP | GRE | OSPF ]
<Packet Direction>
Attempted TCP/UDP/IGMP/ESP/GRE/OSPF access
matched the default policy and was blocked or
forwarded according to the default policy’s
setting.
Firewall rule [NOT] match:[ TCP
| UDP | IGMP | ESP | GRE | OSPF
] <Packet Direction>, <rule:%d>
Attempted TCP/UDP/IGMP/ESP/GRE/OSPF access
matched (or did not match) a configured firewall
rule (denoted by its number) and was blocked or
forwarded according to the rule.
Triangle route packet forwarded:
[ TCP | UDP | IGMP | ESP | GRE |
OSPF ]
The firewall allowed a triangle route session to
pass through.
Packet without a NAT table entry
blocked: [ TCP | UDP | IGMP |
ESP | GRE | OSPF ]
The router blocked a packet that didn't have a
corresponding NAT table entry.
Router sent blocked web site
message: TCP The router sent a message to notify a user that
the router blocked access to a web site that the
user requested.
Exceed maximum sessions per host
(%d). The device blocked a session because the host's
connections exceeded the maximum sessions per
host.
Firewall allowed a packet that
matched a NAT session: [ TCP |
UDP ]
A packet from the WAN (TCP or UDP) matched a
cone NAT session and the device forwarded it to
the LAN.
Table 66 System Maintenance Logs (continued)
LOG MESSAGE DESCRIPTION
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Table 68 TCP Reset Logs
LOG MESSAGE DESCRIPTION
Under SYN flood attack,
sent TCP RST The router sent a TCP reset packet when a host was
under a SYN flood attack (the TCP incomplete count is per
destination host.)
Exceed TCP MAX
incomplete, sent TCP RST The router sent a TCP reset packet when the number of
TCP incomplete connections exceeded the user configured
threshold. (the TCP incomplete count is per destination
host.)
Peer TCP state out of
order, sent TCP RST The router sent a TCP reset packet when a TCP
connection state was out of order.Note: The firewall refers
to RFC793 Figure 6 to check the TCP state.
Firewall session time
out, sent TCP RST The router sent a TCP reset packet when a dynamic
firewall session timed out.
The default timeout values are as follows:
ICMP idle timeout: 3 minutes
UDP idle timeout: 3 minutes
TCP connection (three way handshaking) timeout: 270
seconds
TCP FIN-wait timeout: 2 MSL (Maximum Segment
Lifetime set in the TCP header).
TCP idle (established) timeout (s): 150 minutes
TCP reset timeout: 10 seconds
Exceed MAX incomplete,
sent TCP RST The router sent a TCP reset packet when the number of
incomplete connections (TCP and UDP) exceeded the
user-configured threshold. (Incomplete count is for all
TCP and UDP connections through the firewall.)Note:
When the number of incomplete connections (TCP + UDP)
> “Maximum Incomplete High”, the router sends TCP RST
packets for TCP connections and destroys TOS (firewall
dynamic sessions) until incomplete connections <
“Maximum Incomplete Low”.
Access block, sent TCP
RST The router sends a TCP RST packet and generates this log
if you turn on the firewall TCP reset mechanism (via CI
command: sys firewall tcprst).
Table 69 Packet Filter Logs
LOG MESSAGE DESCRIPTION
[ TCP | UDP | ICMP | IGMP |
Generic ] packet filter
matched (set: %d, rule: %d)
Attempted access matched a configured filter rule
(denoted by its set and rule number) and was blocked
or forwarded according to the rule.
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For type and code details, see Table 76 on page 161.
Table 70 ICMP Logs
LOG MESSAGE DESCRIPTION
Firewall default policy: ICMP
<Packet Direction>, <type:%d>,
<code:%d>
ICMP access matched the default policy and was
blocked or forwarded according to the user's
setting.
Firewall rule [NOT] match: ICMP
<Packet Direction>, <rule:%d>,
<type:%d>, <code:%d>
ICMP access matched (or didn’t match) a firewall
rule (denoted by its number) and was blocked or
forwarded according to the rule.
Triangle route packet forwarded:
ICMP The firewall allowed a triangle route session to
pass through.
Packet without a NAT table entry
blocked: ICMP The router blocked a packet that didn’t have a
corresponding NAT table entry.
Unsupported/out-of-order ICMP:
ICMP The firewall does not support this kind of ICMP
packets or the ICMP packets are out of order.
Router reply ICMP packet: ICMP The router sent an ICMP reply packet to the
sender.
Table 71 PPP Logs
LOG MESSAGE DESCRIPTION
ppp:LCP Starting The PPP connection’s Link Control Protocol stage has started.
ppp:LCP Opening The PPP connection’s Link Control Protocol stage is opening.
ppp:CHAP Opening The PPP connection’s Challenge Handshake Authentication Protocol
stage is opening.
ppp:IPCP
Starting The PPP connection’s Internet Protocol Control Protocol stage is
starting.
ppp:IPCP Opening The PPP connection’s Internet Protocol Control Protocol stage is
opening.
ppp:LCP Closing The PPP connection’s Link Control Protocol stage is closing.
ppp:IPCP Closing The PPP connection’s Internet Protocol Control Protocol stage is
closing.
Table 72 UPnP Logs
LOG MESSAGE DESCRIPTION
UPnP pass through Firewall UPnP packets can pass through the firewall.
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For type and code details, see Table 76 on page 161.
Table 73 Content Filtering Logs
LOG MESSAGE DESCRIPTION
%s: Keyword blocking The content of a requested web page matched a user defined
keyword.
%s: Not in trusted web
list The web site is not in a trusted domain, and the router blocks
all traffic except trusted domain sites.
%s: Forbidden Web site The web site is in the forbidden web site list.
%s: Contains ActiveX The web site contains ActiveX.
%s: Contains Java
applet The web site contains a Java applet.
%s: Contains cookie The web site contains a cookie.
%s: Proxy mode
detected The router detected proxy mode in the packet.
%s: Trusted Web site The web site is in a trusted domain.
%s When the content filter is not on according to the time
schedule:
Waiting content
filter server
timeout
The external content filtering server did not respond within
the timeout period.
DNS resolving
failed The OX253P cannot get the IP address of the external content
filtering via DNS query.
Creating socket
failed The OX253P cannot issue a query because TCP/UDP socket
creation failed, port:port number.
Connecting to
content filter
server fail
The connection to the external content filtering server failed.
License key is
invalid The external content filtering license key is invalid.
Table 74 Attack Logs
LOG MESSAGE DESCRIPTION
attack [ TCP | UDP | IGMP
| ESP | GRE | OSPF ] The firewall detected a TCP/UDP/IGMP/ESP/GRE/OSPF
attack.
attack ICMP (type:%d,
code:%d) The firewall detected an ICMP attack.
land [ TCP | UDP | IGMP |
ESP | GRE | OSPF ] The firewall detected a TCP/UDP/IGMP/ESP/GRE/OSPF
land attack.
land ICMP (type:%d,
code:%d) The firewall detected an ICMP land attack.
ip spoofing - WAN [ TCP |
UDP | IGMP | ESP | GRE |
OSPF ]
The firewall detected an IP spoofing attack on the WAN
port.
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ip spoofing - WAN ICMP
(type:%d, code:%d) The firewall detected an ICMP IP spoofing attack on the
WAN port.
icmp echo : ICMP
(type:%d, code:%d) The firewall detected an ICMP echo attack.
syn flood TCP The firewall detected a TCP syn flood attack.
ports scan TCP The firewall detected a TCP port scan attack.
teardrop TCP The firewall detected a TCP teardrop attack.
teardrop UDP The firewall detected an UDP teardrop attack.
teardrop ICMP (type:%d,
code:%d) The firewall detected an ICMP teardrop attack.
illegal command TCP The firewall detected a TCP illegal command attack.
NetBIOS TCP The firewall detected a TCP NetBIOS attack.
ip spoofing - no routing
entry [ TCP | UDP | IGMP
| ESP | GRE | OSPF ]
The firewall classified a packet with no source routing
entry as an IP spoofing attack.
ip spoofing - no routing
entry ICMP (type:%d,
code:%d)
The firewall classified an ICMP packet with no source
routing entry as an IP spoofing attack.
vulnerability ICMP
(type:%d, code:%d) The firewall detected an ICMP vulnerability attack.
traceroute ICMP (type:%d,
code:%d) The firewall detected an ICMP traceroute attack.
ports scan UDP The firewall detected a UDP port scan attack.
Firewall sent TCP packet
in response to DoS attack
TCP
The firewall sent TCP packet in response to a DoS attack
ICMP Source Quench ICMP The firewall detected an ICMP Source Quench attack.
ICMP Time Exceed ICMP The firewall detected an ICMP Time Exceed attack.
ICMP Destination
Unreachable ICMP The firewall detected an ICMP Destination Unreachable
attack.
ping of death. ICMP The firewall detected an ICMP ping of death attack.
smurf ICMP The firewall detected an ICMP smurf attack.
Table 75 Remote Management Logs
LOG MESSAGE DESCRIPTION
Remote Management: FTP denied Attempted use of FTP service was blocked according
to remote management settings.
Remote Management: TELNET
denied Attempted use of TELNET service was blocked
according to remote management settings.
Remote Management: HTTP or
UPnP denied Attempted use of HTTP or UPnP service was blocked
according to remote management settings.
Table 74 Attack Logs (continued)
LOG MESSAGE DESCRIPTION
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Remote Management: WWW denied Attempted use of WWW service was blocked
according to remote management settings.
Remote Management: HTTPS
denied Attempted use of HTTPS service was blocked
according to remote management settings.
Remote Management: SSH denied Attempted use of SSH service was blocked
according to remote management settings.
Remote Management: ICMP Ping
response denied Attempted use of ICMP service was blocked
according to remote management settings.
Remote Management: DNS denied Attempted use of DNS service was blocked
according to remote management settings.
Table 76 ICMP Notes
TYPE CODE DESCRIPTION
0Echo Reply
0Echo reply message
3Destination Unreachable
0Net unreachable
1Host unreachable
2Protocol unreachable
3Port unreachable
4A packet that needed fragmentation was dropped because it was set
to Don't Fragment (DF)
5Source route failed
4Source Quench
0A gateway may discard internet datagrams if it does not have the
buffer space needed to queue the datagrams for output to the next
network on the route to the destination network.
5Redirect
0Redirect datagrams for the Network
1Redirect datagrams for the Host
2Redirect datagrams for the Type of Service and Network
3Redirect datagrams for the Type of Service and Host
8Echo
0Echo message
11 Time Exceeded
0Time to live exceeded in transit
1Fragment reassembly time exceeded
12 Parameter Problem
0Pointer indicates the error
13 Timestamp
Table 75 Remote Management Logs
LOG MESSAGE DESCRIPTION
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0Timestamp request message
14 Timestamp Reply
0Timestamp reply message
15 Information Request
0Information request message
16 Information Reply
0Information reply message
Table 76 ICMP Notes (continued)
TYPE CODE DESCRIPTION
OX253P User’s Guide 163
CHAPTER 16
The Status Screen
16.1 Overview
Use this screen to view a complete summary of your OX253P connection status.
16.2 Status Screen
Click the STATUS icon in the navigation bar to go to this screen, where you can
view the current status of the device, system resources, interfaces (LAN and
WAN), and SIP accounts. You can also register and un-register SIP accounts as
well as view detailed information from DHCP and statistics from WiMAX,
bandwidth management, and traffic.
Figure 70 Status
Chapter 16The Status Screen
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164
The following tables describe the labels in this screen.
Table 77 Status
LABEL DESCRIPTION
Refresh IntervalSelect how often you want the OX253P to update this screen.
Refresh NowClick this to update this screen immediately.
Device Information
System NameThis field displays the OX253P system name. It is used for
identification.
You can change this in the ADVANCED > System Configuration >
General screen’s System Name field.
Firmware
Version This field displays the current version of the firmware inside the device.
It also shows the date the firmware version was created.
You can change the firmware version by uploading new firmware in
ADVANCED > System Configuration > Firmware.
WAN Information
IP AddressThis field displays the current IP address of the OX253P in the WAN.
IP Subnet MaskThis field displays the current subnet mask on the WAN.
DHCPThis field displays what DHCP services the OX253P is using in the WAN.
Choices are:
Client - The OX253P is a DHCP client in the WAN. Its IP address
comes from a DHCP server on the WAN.
None - The OX253P is not using any DHCP services in the WAN. It
has a static IP address.
LAN Information
IP AddressThis field displays the current IP address of the OX253P in the LAN.
IP Subnet MaskThis field displays the current subnet mask in the LAN.
DHCPThis field displays what DHCP services the OX253P is providing to the
LAN. Choices are:
Server - The OX253P is a DHCP server in the LAN. It assigns IP
addresses to other computers in the LAN.
Relay - The OX253P is routing DHCP requests to one or more DHCP
servers. The DHCP server(s) may be on another network.
None - The OX253P is not providing any DHCP services to the LAN.
You can change this in ADVANCED > LAN Configuration > DHCP
Setup.
WiMAX Information
Sequans
Firmware
Version
This field displays the firmware version of the WiMAX chipset on the
OX253P.
Operator ID Every WiMAX service provider has a unique Operator ID number, which
is broadcast by each base station it owns. You can only connect to the
Internet through base stations belonging to your service provider’s
network.
BS ID This field displays the identification number of the wireless base station
to which the OX253P is connected. Every base station transmits a
unique BSID, which identifies it across the network.
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Frequency This field displays the radio frequency of the OX253P’s wireless
connection to a base station.
MAC address This field displays the Media Access Control address of the OX253P.
Every network device has a unique MAC address which identifies it
across the network.
WiMAX StateThis field displays the status of the OX253P’s current connection.
•INIT: the OX253P is starting up.
•DL_SYN: The OX253P is unable to connect to a base station.
•RANGING: the OX253P and the base station are transmitting and
receiving information about the distance between them. Ranging
allows the OX253P to use a lower transmission power level when
communicating with a nearby base station, and a higher
transmission power level when communicating with a distant base
station.
•CAP_NEGO: the OX253P and the base station are exchanging
information about their capabilities.
•AUTH: the OX253P and the base station are exchanging security
information.
•REGIST: the OX253P is registering with a RADIUS server.
•OPERATIONAL: the OX253P has successfully registered with the
base station. Traffic can now flow between the OX253P and the base
station.
•IDLE: the OX253P is in power saving mode, but can connect when a
base station alerts it that there is traffic waiting.
Bandwidth This field shows the size of the bandwidth step the OX253P uses to
connect to a base station in megahertz (MHz).
CINR Mean This field shows the average Carrier to Interference plus Noise Ratio of
the current connection. This value is an indication of overall radio signal
quality. A higher value indicates a higher signal quality, and a lower
value indicates a lower signal quality.
CINR Deviation This field shows the amount of change in the CINR level. This value is
an indication of radio signal stability. A lower number indicates a more
stable signal, and a higher number indicates a less stable signal.
CINR Reuse 1 This field shows the WiMAX signal quality when the OX253P is
transmitting data to the base station. A higher value indicates a higher
signal quality, and a lower value indicates a lower signal quality. The
base station determines downlink (DL) and uplink (UL) modulations
based on this value.
RSSI This field shows the Received Signal Strength Indication. This value is a
measurement of overall radio signal strength. A higher RSSI level
indicates a stronger signal, and a lower RSSI level indicates a weaker
signal.
A strong signal does not necessarily indicate a good signal: a strong
signal may have a low signal-to-noise ratio (SNR).
UL Data Rate This field shows the number of data packets uploaded from the OX253P
to the base station each second.
Table 77 Status (continued)
LABEL DESCRIPTION
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UL Modulation This field shows the modulation technique (QPSK or 16-QAM) the
OX253P is using for transmitting data to the base station. 16-QAM
modulation gets higher transmission rate because it carries more data
than QPSK. The possible values of this field are qpsk-ctc-1/2,qpsk-
ctc-3/4,qam16-ctc-1/2,qam16-ctc-3/4.
See Section 16.3 on page 171 for more information.
DL Data Rate This field shows the number of data packets downloaded to the OX253P
from the base station each second.
DL Modulation This field shows the modulation technique (QPSK, 16-QAM or 64-QAM)
the base station is using for transmitting data to the OX253P. 64-QAM
modulation gets higher transmission rate becuase it carries more data
than QPSK and 16-QAM. The possible values of this field are qpsk-ctc-
1/2,qpsk-ctc-3/4,qam16-ctc-1/2,qam16-ctc-3/4, qam64-ctc-
1/2,qam64-ctc-2/3,qam64-ctc-3/4,qam64-ctc-5/6.
See Section 16.3 on page 171 for more information.
Tx Power This field shows the output transmission (Tx) level of the OX253P.
System Status
System UptimeThis field displays how long the OX253P has been running since it last
started up. The OX253P starts up when you plug it in, when you restart
it (ADVANCED > System Configuration > Restart), or when you
reset it.
Current Date/
Time This field displays the current date and time in the OX253P. You can
change this in SETUP > Time Setting.
Memory UsageThis field displays what percentage of the OX253P’s memory is
currently used. The higher the memory usage, the more likely the
OX253P is to slow down. Some memory is required just to start the
OX253P and to run the web configurator. You can reduce the memory
usage by disabling some services (see CPU Usage); by reducing the
amount of memory allocated to NAT and firewall rules (you may have to
reduce the number of NAT rules or firewall rules to do so); or by
deleting rules in functions such as incoming call policies, speed dial
entries, and static routes.
Interface Status
InterfaceThis column displays each interface of the OX253P.
StatusThis field indicates whether or not the OX253P is using the interface.
For the WAN interface, this field displays Up when the OX253P is
connected to a WiMAX network, and Down when the OX253P is not
connected to a WiMAX network.
For the LAN interface, this field displays Up when the OX253P is using
the interface and Down when the OX253P is not using the interface.
RateFor the LAN ports this displays the port speed and duplex setting.
For the WAN interface, it displays the downstream and upstream
transmission rate or N/A if the OX253P is not connected to a base
station.
For the WLAN interface, it displays the transmission rate when WLAN is
enabled or N/A when WLAN is disabled.
Table 77 Status (continued)
LABEL DESCRIPTION
Chapter 16The Status Screen
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16.2.1 Packet Statistics
Click Status > Packet Statistics to open this screen. This read-only screen
displays information about the data transmission through the OX253P. To
configure these settings, go to the corresponding area in the Advanced screens.
Figure 71 Packet Statistics
The following table describes the fields in this screen.
Summary
WiMAX Site
Information Click this link to view details of the radio frequencies used by the
OX253P to connect to a base station.
WiMAX ProfileClick this link to view details of the current wireless security settings.
Packet
Statistics Click this link to view port status and packet specific statistics.
DHCP TableClick this link to see details of computers to which the OX253P has
given an IP address.
Table 77 Status (continued)
LABEL DESCRIPTION
Table 78 Packet Statistics
LABEL DESCRIPTION
PortThis column displays each interface of the OX253P.
Status This field indicates whether or not the OX253P is using the interface.
For the WAN interface, this field displays the port speed and duplex
setting when the OX253P is connected to a WiMAX network, and
Down when the OX253P is not connected to a WiMAX network.
For the LAN interface, this field displays the port speed and duplex
setting when the OX253P is using the interface and Down when the
OX253P is not using the interface.
For the WLAN interface, it displays the transmission rate when WLAN
is enabled or Down when WLAN is disabled.
TxPkts This field displays the number of packets transmitted on this interface.
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168
16.2.2 WiMAX Site Information
Click Status > WiMAX Site Information to open this screen. This read-only
screen shows WiMAX frequency information for the OX253P. These settings can be
configured in the ADVANCED > WAN Configuration > WiMAX Configuration
screen.
Figure 72 WiMAX Configuation
RxPkts This field displays the number of packets received on this interface.
Collisions This field displays the number of collisions on this port.
Tx B/s This field displays the number of bytes transmitted in the last second.
Rx B/s This field displays the number of bytes received in the last second.
Up Time This field displays the elapsed time this interface has been connected.
System up Time This is the elapsed time the system has been on.
Poll Interval(s) Type the time interval for the browser to refresh system statistics.
Set Interval Click this button to apply the new poll interval you entered in the Poll
Interval field above.
Stop Click this button to halt the refreshing of the system statistics.
Table 78 Packet Statistics (continued)
LABEL DESCRIPTION
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The following table describes the labels in this screen.
16.2.3 DHCP Table
Click Status > DHCP Table to open this screen. This read-only screen shows the
IP addresses, Host Names and MAC addresses of the devices currently connected
to the OX253P. These settings can be configured in the ADVANCED > LAN
Configuration > DHCP Setup screen.
Figure 73 DHCP Table
Each field is described in the following table.
Table 79 WiMAX Configuration
LABEL DESCRIPTION
DL Frequency
[1] ~ [19]
These fields show the downlink frequency settings in kilohertz
(kHz). These settings determine how the OX253P searches for an
available wireless connection.
Table 80 DHCP Table
LABEL DESCRIPTION
#The number of the item in this list.
IP AddressThis field displays the IP address the OX253P assigned to a computer
in the network.
Host NameThis field displays the system name of the computer to which the
OX253P assigned the IP address.
MAC AddressThis field displays the MAC address of the computer to which the
OX253P assigned the IP address.
RefreshClick this button to update the table data.
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16.2.4 WiMAX Profile
Click Status > WiMAX Profile to open this screen. This read-only screen displays
information about the security settings you are using. To configure these settings,
go to the ADVANCED > WAN Configuration > Internet Connection screen.
Note: Not all OX253P models have all the fields shown here.
Figure 74 WiMAX Profile
The following table describes the labels in this screen.
Table 81 The WiMAX Profile Screen
LABEL DESCRIPTION
User NameThis is the username for your Internet access account.
PasswordThis is the password for your Internet access account. The
password displays as a row of asterisks for security purposes.
Anonymous IdentityThis is the anonymous identity provided by your Internet Service
Provider. Anonymous identity (also known as outer identity) is
used with EAP-TTLS encryption.
PKMThis field displays the Privacy Key Management version number.
PKM provides security between the OX253P and the base station.
See the WiMAX security appendix for more information.
AuthenticationThis field displays the user authentication method. Authentication
is the process of confirming the identity of a user (by means of a
username and password, for example).
EAP-TTLS allows an MS/SS and a base station to establish a secure
link (or ‘tunnel’) with an AAA (Authentication, Authorization and
Accounting) server in order to exchange authentication
information. See the WiMAX security appendix for more details.
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16.3 Technical Reference
The following section contains additional technical information about the OX253P
features described in this chapter.
Modulation
A modulation technique is a method used to encode digital or analog information
onto an analog carrier signal so it can be transmitted. A device modulates digital
data onto an radio signal to send over the wireless network. The receiving device
demodulates the radio signals back to digital data. The specific frequency at which
the information is modulated on the radio signal is called the carrier.
QPSK
The Quadrature Phase-Shift Keying digital modulation technique is used in WiMAX
networks to transmit downlink traffic using a maximum data rate of 9.5 Mbps.
16QAM
The Quadrature Amplitude Modulation (QAM) digital modulation technique
modulates (changes) the amplitude of two carrier waves. WiMAX networks use
16QAM to transmit downlink traffic using a data rate of 18 Mbps.
TTLS Inner EAPThis field displays the type of secondary authentication method.
Once a secure EAP-TTLS connection is established, the inner EAP is
the protocol used to exchange security information between the
mobile station, the base station and the AAA server to
authenticate the mobile station. See the WiMAX security appendix
for more details.
The OX253P supports the following inner authentication types:
•CHAP (Challenge Handshake Authentication Protocol)
•MSCHAP (Microsoft CHAP)
•MSCHAPV2 (Microsoft CHAP version 2)
•PAP (Password Authentication Protocol)
CertificateThis is the security certificate the OX253P uses to authenticate the
AAA server, if one is available.
Table 81 The WiMAX Profile Screen (continued)
LABEL DESCRIPTION
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CHAPTER 17
Troubleshooting
This chapter offers some suggestions to solve problems you might encounter. The
potential problems are divided into the following categories:
•Power, Hardware Connections, and LEDs
•OX253P Access and Login
•Internet Access
•Export a Certificate File
17.1 Power, Hardware Connections, and LEDs
The OX253P does not turn on. None of the LEDs turn on.
1Make sure you are using the power adapter or cord included with the OX253P.
2Make sure the power adapter or cord is connected to the OX253P and plugged in
to an appropriate power source. Make sure the power source is turned on.
3Disconnect and re-connect the power adapter or cord to the OX253P.
4If the problem continues, contact the vendor.
One of the LEDs does not behave as expected.
1Make sure you understand the normal behavior of the LED. See Section 1.2.1 on
page 20 for more information.
2Check the hardware connections. See the Quick Start Guide.
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3Inspect your cables for damage. Contact the vendor to replace any damaged
cables.
4Disconnect and re-connect the power adapter to the OX253P.
5If the problem continues, contact the vendor.
I hear beeping sounds coming from the OX253P.
1When the OX253P receives signals from a base station, it beeps to notify you.
2If you do not want to hear beeps from the OX253P, log into the Web Configurator
and disable the buzzer in the ADVANCED > WAN Configuration > Buzzer
screen.
17.2 OX253P Access and Login
I forgot the IP address for the OX253P.
1The default IP address is http://192.168.1.1.
2If you changed the IP address and have forgotten it, you might get the IP address
of the OX253P by looking up the IP address of the default gateway for your
computer. To do this in most Windows computers, click Start > Run, enter cmd,
and then enter ipconfig. The IP address of the Default Gateway might be the IP
address of the OX253P (it depends on the network), so enter this IP address in
your Internet browser.
3If this does not work, you have to reset the OX253P to its factory defaults. See
Section 17.1 on page 173.
I forgot the password.
1The default password of the administrator account is admin.
2If this does not work, you have to reset the OX253P to its factory defaults. See
Section 9.5 on page 93.
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I cannot see or access the Login screen in the web configurator.
1Make sure you are using the correct IP address.
•The default IP address is http://192.168.1.1.
•If you changed the IP address (Section 5.2 on page 48), use the new IP
address.
•If you changed the IP address and have forgotten it, see the troubleshooting
suggestions for I forgot the IP address for the OX253P.
2Check the hardware connections, and make sure the LEDs are behaving as
expected. See the Quick Start Guide and Section 1.2.1 on page 20.
3Make sure your Internet browser does not block pop-up windows and has
JavaScript and Java enabled. See Appendix C on page 217.
4If there is a DHCP server on your network, make sure your computer is using a
dynamic IP address. Your OX253P is a DHCP server by default.
If there is no DHCP server on your network, make sure your computer’s IP
address is in the same subnet as the OX253P. See Appendix D on page 229.
5Reset the OX253P to its factory defaults, and try to access the OX253P with the
default IP address. See Section 9.6 on page 95.
6If the problem continues, contact the network administrator or vendor, or try one
of the advanced suggestions.
Advanced Suggestions
•Try to access the OX253P using another service, such as Telnet. If you can
access the OX253P, check the remote management settings and firewall rules to
find out why the OX253P does not respond to HTTP.
•If your computer is connected wirelessly, use a computer that is connected to a
LAN/ETHERNET port.
I can see the Login screen, but I cannot log in to the OX253P.
1Make sure you have entered the user name and password correctly. The default
user name is admin, and the default password is admin. These fields are case-
sensitive, so make sure [Caps Lock] is not on.
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2You cannot log in to the web configurator while someone is using Telnet to access
the OX253P. Log out of the OX253P in the other session, or ask the person who is
logged in to log out.
3Disconnect and re-connect the power adapter or cord to the OX253P.
4If this does not work, you have to reset the OX253P to its factory defaults. See
Section 9.5 on page 93.
I cannot Telnet to the OX253P.
See the troubleshooting suggestions for I cannot see or access the Login screen in
the web configurator. Ignore the suggestions about your browser.
17.3 Internet Access
I cannot access the Internet.
1Check the hardware connections, and make sure the LEDs are behaving as
expected. See the Quick Start Guide and Section 1.2.1 on page 20.
2Make sure you entered your ISP account information correctly in the wizard. These
fields are case-sensitive, so make sure [Caps Lock] is not on.
3Check your security settings. In the web configurator, go to the Status screen.
Click the WiMAX Profile link in the Summary box and make sure that you are
using the correct security settings for your Internet account.
4Check your WiMAX settings. The OX253P may have been set to search the wrong
frequencies for a wireless connection. In the web configurator, go to the Status
screen. Click the WiMAX Site Information link in the Summary box and ensure
that the values are correct. If the values are incorrect, enter the correct frequency
settings in the ADVANCED > WAN Configuration > WiMAX Configuration
screen. If you are unsure of the correct values, contact your service provider.
5If you are trying to access the Internet wirelessly, make sure the wireless settings
in the wireless client are the same as the settings in the AP.
6Disconnect all the cables from your OX253P, and follow the directions in the Quick
Start Guide again.
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7If the problem continues, contact your ISP.
I cannot access the Internet any more. I had access to the Internet (with the
OX253P), but my Internet connection is not available any more.
1Check the hardware connections, and make sure the LEDs are behaving as
expected. See the Quick Start Guide and Section 1.2.1 on page 20.
2Disconnect and re-connect the power adapter to the OX253P.
3If the problem continues, contact your ISP.
The Internet connection is slow or intermittent.
1The quality of the OX253P’s wireless connection to the base station may be poor.
Poor signal reception may be improved by moving the OX253P away from thick
walls and other obstructions, or to a higher floor in your building.
2There may be radio interference caused by nearby electrical devices such as
microwave ovens and radio transmitters. Move the OX253P away or switch the
other devices off. Weather conditions may also affect signal quality.
3There might be a lot of traffic on the network. Look at the LEDs, and check Section
1.2.1 on page 20. If the OX253P is sending or receiving a lot of information, try
closing some programs that use the Internet, especially peer-to-peer applications.
4Disconnect and re-connect the power adapter to the OX253P.
5If the problem continues, contact the network administrator or vendor, or try one
of the advanced suggestions.
The Internet connection disconnects.
1Check your WiMAX link and signal strength using the WiMAX Link and Strength
Indicator LEDs on the device.
2Contact your ISP if the problem persists.
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17.4 Export a Certificate File
When I try to export a certificate file from the OX253P, the exporting process
hangs.
1You may encounter this issue if you are using Internet Explorer 8.
2Make sure you have upgraded to Internet Explorer 8 standard version.
3To resolve this, select Tool > SmartScreen Filter > Turn On SmartScreen
Filter in your browser.
Figure 75 Internet Explorer 8: Turn On Safety Filter
4Select Turn off SmartScreen Filter and click OK. Export the certificate file
again, you should be able to download the file now.
Figure 76 Internet Explorer 8: Turn Off Safety Filter
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17.5 Reset the OX253P to Its Factory Defaults
If you reset the OX253P, you lose all of the changes you have made. The OX253P
re-loads its default settings, and the password resets to admin. You have to make
all of your changes again.
17.5.1 Pop-up Windows, JavaScripts and Java Permissions
Please see Appendix C on page 217.
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CHAPTER 18
Product Specifications
This chapter gives details about your OX253P’s hardware and firmware features.
Table 82 Environmental and Hardware Specifications
FEATUREDESCRIPTION
Operating Temperature-15°C to 60°C (ODU), -10°C to 55°C (IDU)
Storage Temperature-15°C to 65°C (ODU), -15°C to 60°C (IDU)
Operating Humidity10% ~ 90% (non-condensing)
Storage Humidity 10% to 95% (non-condensing)
Power SupplyInput: AC Voltage Range: 90 VAC - 270 VAC
AC Voltage Rating: 100 VAC - 240 VAC
Output: 48VDC, 0.38A Max.
Power ConsumptionUS: maximum 18.24W, average 7.932W
EU: maximum 12.12W
Ethernet InterfaceOne auto-negotiating, auto-MDI/MDI-X NWay 10/100 Mbps
RJ-45 Ethernet port
Power over Ethernet
Interface (PoE) One RJ-45-type PoE port providing 48V DC to the OX253P-
ODU from the OX253P-IDU
AntennasOne 15dBi ± 0.5dBi Cross-Polarization antenna (ODU)
Weight400g
DimensionsODU: 372 (L) mm x 232 (W) mm x 54.8 (H) mm
IDU: 188.5 (L) mm x 131.2 (W) mm x 42 (H) mm
Table 83 Radio Specifications
FEATUREDESCRIPTION
WiMAX Operating
Frequency 2.5~2.7 GHz
Channel Bandwidth5MHz / 10MHz
Maximum Transmit Power26dbm with ODU antenna deployed.
WiMAX ComplianceCompliant to receiver performances defined in IEEE
P802.16-2005, §8.4.13.
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Table 84 Firmware Specifications
FEATUREDESCRIPTION
Web-based Configuration
and Management Tool Also known as “the web configurator”, this is a firmware-
based management solution for the OX253P. You must
connect using a compatible web browser in order to use it.
High Speed Wireless
Internet Access The OX253P is ideal for high-speed wireless Internet
browsing.
WiMAX (Worldwide Interoperability for Microwave Access) is a
wireless networking standard providing high-bandwidth,
wide-range secured wireless service. The OX253P is a WiMAX
mobile station (MS) compatible with the IEEE 802.16e
standard.
FirewallThe OX253P is a stateful inspection firewall with DoS (Denial
of Service) protection. By default, when the firewall is
activated, all incoming traffic from the WAN to the LAN is
blocked unless it is initiated from the LAN. The OX253P’s
firewall supports TCP/UDP inspection, DoS detection and
prevention, real time alerts, reports and logs.
Content FilteringThe OX253P can block access to web sites containing
specified keywords. You can define time periods and days
during which content filtering is enabled and include or
exclude a range of users on the LAN from content filtering.
Network Address
Translation (NAT) Network Address Translation (NAT) allows the translation of
an Internet protocoladdress used within one network (for
example a private IP address used in a local network) to a
different IP address known withinanother network (for
example a public IP address used on the Internet).
Universal Plug and Play
(UPnP) Your device and other UPnP enabled devices can use the
standard TCP/IP protocol to dynamically join a network,
obtain an IP address and convey their capabilities to each
other.
Dynamic DNS SupportWith Dynamic DNS support, you can have a static hostname
alias for a dynamic IP address, allowing the host to be more
easily accessible from various locations on the Internet. You
must register for this service with a Dynamic DNS service
provider.
DHCPDHCP (Dynamic Host Configuration Protocol) allows the
individual clients (computers) to obtain the TCP/IP
configuration at start-up from a centralized DHCP server. Your
device has built-in DHCP server capability enabled by default.
It can assign IP addresses, an IP default gateway and DNS
servers to DHCP clients. Your device can also act as a
surrogate DHCP server (DHCP Relay) where it relays IP
address assignment from the actual real DHCP server to the
clients.
IP AliasIP alias allows you to partition a physical network into logical
networks over the same Ethernet interface. Your device
supports three logical LAN interfaces via its single physical
Ethernet interface with the your device itself as the gateway
for each LAN network.
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Time and DateGet the current time and date from an external server when
you turn on your OX253P. You can also set the time
manually.
LoggingUse the OX253P’s logging feature to view connection history,
surveillance logs, and error messages.
Table 85 Standards Supported
STANDARD DESCRIPTION
RFC 768User Datagram Protocol
RFC 791Internet Protocol v4
RFC 792Internet Control Message Protocol
RFC 792Transmission Control Protocol
RFC 826Address Resolution Protocol
RFC 854Telnet Protocol
RFC 1349Type of Service Protocol
RFC 1706DNS NSAP Resource Records
RFC 1889Real-time Transport Protocol (RTP)
RFC 1890Real-time Transport Control Protocol (RTCP)
RFC 2030Simple Network Time Protocol
RFC 2104HMAC: Keyed-Hashing for Message Authentication
RFC 2131Dynamic Host Configuration Protocol
RFC 2401Security Architecture for the Internet Protocol
RFC 2409Internet Key Exchange
RFC 2475Architecture for Differentiated Services (Diffserv)
RFC 2617Hypertext Transfer Protocol (HTTP) Authentication: Basic and Digest
Access Authentication
RFC 2782A DNS RR for specifying the location of services (DNS SRV)
RFC 3261Session Initiation Protocol (SIP version 2)
RFC 3262Reliability of Provisional Responses in the Session Initiation Protocol
(SIP).
RFC 3550RTP - A Real Time Protocol for Real-Time Applications
RFC 3611RTP Control Protocol Extended Reports (RTCP XR)-XR
RFC 3715IP Sec/NAT Compatibility
IEEE 802.310BASE5 10 Mbit/s (1.25 MB/s)
IEEE 802.3u100BASE-TX, 100BASE-T4, 100BASE-FX Fast Ethernet at 100 Mbit/s
(12.5 MB/s) with auto-negotiation
Table 84 Firmware Specifications (continued)
FEATUREDESCRIPTION
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APPENDIX A
WiMAX Security
Wireless security is vital to protect your wireless communications. Without it,
information transmitted over the wireless network would be accessible to any
networking device within range.
User Authentication and Data Encryption
The WiMAX (IEEE 802.16) standard employs user authentication and encryption to
ensure secured communication at all times.
User authentication is the process of confirming a user’s identity and level of
authorization. Data encryption is the process of encoding information so that it
cannot be read by anyone who does not know the code.
WiMAX uses PKMv2 (Privacy Key Management version 2) for authentication, and
CCMP (Counter Mode with Cipher Block Chaining Message Authentication Protocol)
for data encryption.
WiMAX supports EAP (Extensible Authentication Protocol, RFC 2486) which allows
additional authentication methods to be deployed with no changes to the base
station or the mobile or subscriber stations.
PKMv2
PKMv2 is a procedure that allows authentication of a mobile or subscriber station
and negotiation of a public key to encrypt traffic between the MS/SS and the base
station. PKMv2 uses standard EAP methods such as Transport Layer Security
(EAP-TLS) or Tunneled TLS (EAP-TTLS) for secure communication.
In cryptography, a ‘key’ is a piece of information, typically a string of random
numbers and letters, that can be used to ‘lock’ (encrypt) or ‘unlock’ (decrypt) a
message. Public key encryption uses key pairs, which consist of a public (freely
available) key and a private (secret) key. The public key is used for encryption and
the private key is used for decryption. You can decrypt a message only if you have
the private key. Public key certificates (or ‘digital IDs’) allow users to verify each
other’s identity.
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RADIUS
RADIUS is based on a client-server model that supports authentication,
authorization and accounting. The base station is the client and the server is the
RADIUS server. The RADIUS server handles the following tasks:
•Authentication
Determines the identity of the users.
•Authorization
Determines the network services available to authenticated users once they are
connected to the network.
•Accounting
Keeps track of the client’s network activity.
RADIUS is a simple package exchange in which your base station acts as a
message relay between the MS/SS and the network RADIUS server.
Types of RADIUS Messages
The following types of RADIUS messages are exchanged between the base station
and the RADIUS server for user authentication:
•Access-Request
Sent by an base station requesting authentication.
•Access-Reject
Sent by a RADIUS server rejecting access.
•Access-Accept
Sent by a RADIUS server allowing access.
•Access-Challenge
Sent by a RADIUS server requesting more information in order to allow access.
The base station sends a proper response from the user and then sends another
Access-Request message.
The following types of RADIUS messages are exchanged between the base station
and the RADIUS server for user accounting:
•Accounting-Request
Sent by the base station requesting accounting.
•Accounting-Response
Sent by the RADIUS server to indicate that it has started or stopped accounting.
In order to ensure network security, the access point and the RADIUS server use a
shared secret key, which is a password they both know. The key is not sent over
Appendix AWiMAX Security
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the network. In addition to the shared key, password information exchanged is
also encrypted to protect the network from unauthorized access.
Diameter
Diameter (RFC 3588) is a type of AAA server that provides several improvements
over RADIUS in efficiency, security, and support for roaming.
Security Association
The set of information about user authentication and data encryption between two
computers is known as a security association (SA). In a WiMAX network, the
process of security association has three stages.
•Authorization request and reply
The MS/SS presents its public certificate to the base station. The base station
verifies the certificate and sends an authentication key (AK) to the MS/SS.
•Key request and reply
The MS/SS requests a transport encryption key (TEK) which the base station
generates and encrypts using the authentication key.
•Encrypted traffic
The MS/SS decrypts the TEK (using the authentication key). Both stations can
now securely encrypt and decrypt the data flow.
CCMP
All traffic in a WiMAX network is encrypted using CCMP (Counter Mode with Cipher
Block Chaining Message Authentication Protocol). CCMP is based on the 128-bit
Advanced Encryption Standard (AES) algorithm.
‘Counter mode’ refers to the encryption of each block of plain text with an
arbitrary number, known as the counter. This number changes each time a block
of plain text is encrypted. Counter mode avoids the security weakness of repeated
identical blocks of encrypted text that makes encrypted data vulnerable to
pattern-spotting.
‘Cipher Block Chaining Message Authentication’ (also known as CBC-MAC) ensures
message integrity by encrypting each block of plain text in such a way that its
encryption is dependent on the block before it. This series of ‘chained’ blocks
creates a message authentication code (MAC or CMAC) that ensures the encrypted
data has not been tampered with.
Appendix AWiMAX Security
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Authentication
The OX253P supports EAP-TTLS authentication.
EAP-TTLS (Tunneled Transport Layer Service)
EAP-TTLS is an extension of the EAP-TLS authentication that uses certificates for
only the server-side authentications to establish a secure connection (with EAP-
TLS digital certifications are needed by both the server and the wireless clients for
mutual authentication). Client authentication is then done by sending username
and password through the secure connection, thus client identity is protected. For
client authentication, EAP-TTLS supports EAP methods and legacy authentication
methods such as PAP, CHAP, MS-CHAP and MS-CHAP v2.
OX253P User’s Guide 189
APPENDIX B
Setting Up Your Computer’s IP
Address
This appendix shows you how to configure the IP settings on your computer in
order for it to be able to communicate with the other devices on your network.
Windows Vista/XP/2000, Mac OS 9/OS X, and all versions of UNIX/LINUX include
the software components you need to use TCP/IP on your computer.
If you manually assign IP information instead of using a dynamic IP, make sure
that your network’s computers have IP addresses that place them in the same
subnet.
In this appendix, you can set up an IP address for:
•Windows XP/NT/2000 on page190
•Windows Vista on page193
•Mac OS X: 10.3 and 10.4 on page197
•Mac OS X: 10.5 on page201
•Linux: Ubuntu 8 (GNOME) on page 204
•Linux: openSUSE 10.3 (KDE) on page210
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Windows XP/NT/2000
The following example uses the default Windows XP display theme but can also
apply to Windows 2000 and Windows NT.
1Click Start >Control Panel.
Figure 77 Windows XP: Start Menu
2In the Control Panel, click the Network Connections icon.
Figure 78 Windows XP: Control Panel
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3Right-click Local Area Connection and then select Properties.
Figure 79 Windows XP: Control Panel > Network Connections > Properties
4On the General tab, select Internet Protocol (TCP/IP) and then click
Properties.
Figure 80 Windows XP: Local Area Connection Properties
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5The Internet Protocol TCP/IP Properties window opens.
Figure 81 Windows XP: Internet Protocol (TCP/IP) Properties
6Select Obtain an IP address automatically if your network administrator or ISP
assigns your IP address dynamically.
Select Use the following IP Address and fill in the IP address,Subnet mask,
and Default gateway fields if you have a static IP address that was assigned to
you by your network administrator or ISP. You may also have to enter a Preferred
DNS server and an AlternateDNS server, if that information was provided.
7Click OK to close the Internet Protocol (TCP/IP) Properties window.
Click OK to close the Local Area Connection Properties window.Verifying Settings
1Click Start > All Programs > Accessories > Command Prompt.
2In the Command Prompt window, type "ipconfig" and then press [ENTER].
You can also go to Start > Control Panel > Network Connections, right-click a
network connection, click Status and then click the Support tab to view your IP
address and connection information.
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Windows Vista
This section shows screens from Windows Vista Professional.
1Click Start > Control Panel.
Figure 82 Windows Vista: Start Menu
2In the Control Panel, click the Network and Internet icon.
Figure 83 Windows Vista: Control Panel
3Click the Network and Sharing Center icon.
Figure 84 Windows Vista: Network And Internet
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4Click Manage network connections.
Figure 85 Windows Vista: Network and Sharing Center
5Right-click Local Area Connection and then select Properties.
Figure 86 Windows Vista: Network and Sharing Center
Note: During this procedure, click Continue whenever Windows displays a screen
saying that it needs your permission to continue.
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6Select Internet Protocol Version 4 (TCP/IPv4) and then select Properties.
Figure 87 Windows Vista: Local Area Connection Properties
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7The Internet Protocol Version 4 (TCP/IPv4) Properties window opens.
Figure 88 Windows Vista: Internet Protocol Version 4 (TCP/IPv4) Properties
8Select Obtain an IP address automatically if your network administrator or ISP
assigns your IP address dynamically.
Select Use the following IP Address and fill in the IP address,Subnet mask,
and Default gateway fields if you have a static IP address that was assigned to
you by your network administrator or ISP. You may also have to enter a Preferred
DNS server and an AlternateDNS server, if that information was
provided.Click Advanced.
9Click OK to close the Internet Protocol (TCP/IP) Properties window.
Click OK to close the Local Area Connection Properties window.Verifying Settings
1Click Start > All Programs > Accessories > Command Prompt.
2In the Command Prompt window, type "ipconfig" and then press [ENTER].
You can also go to Start > Control Panel > Network Connections, right-click a
network connection, click Status and then click the Support tab to view your IP
address and connection information.
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Mac OS X: 10.3 and 10.4
The screens in this section are from Mac OS X 10.4 but can also apply to 10.3.
1Click Apple > System Preferences.
Figure 89 Mac OS X 10.4: Apple Menu
2In the System Preferences window, click the Network icon.
Figure 90 Mac OS X 10.4: System Preferences
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3When the Network preferences pane opens, select Built-in Ethernet from the
network connection type list, and then click Configure.
Figure 91 Mac OS X 10.4: Network Preferences
4For dynamically assigned settings, select Using DHCP from the Configure IPv4
list in the TCP/IP tab.
Figure 92 Mac OS X 10.4: Network Preferences > TCP/IP Tab.
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5For statically assigned settings, do the following:
•From the Configure IPv4 list, select Manually.
•In the IP Address field, type your IP address.
•In the Subnet Mask field, type your subnet mask.
•In the Router field, type the IP address of your device.
Figure 93 Mac OS X 10.4: Network Preferences > Ethernet
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Click Apply Now and close the window.Verifying Settings
Check your TCP/IP properties by clicking Applications > Utilities > Network
Utilities, and then selecting the appropriate Network Interface from the Info
tab.
Figure 94 Mac OS X 10.4: Network Utility
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Mac OS X: 10.5
The screens in this section are from Mac OS X 10.5.
1Click Apple > System Preferences.
Figure 95 Mac OS X 10.5: Apple Menu
2In System Preferences, click the Network icon.
Figure 96 Mac OS X 10.5: Systems Preferences
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3When the Network preferences pane opens, select Ethernet from the list of
available connection types.
Figure 97 Mac OS X 10.5: Network Preferences > Ethernet
4From the Configure list, select Using DHCP for dynamically assigned settings.
5For statically assigned settings, do the following:
•From the Configure list, select Manually.
•In the IP Address field, enter your IP address.
•In the Subnet Mask field, enter your subnet mask.
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•In the Router field, enter the IP address of your OX253P.
Figure 98 Mac OS X 10.5: Network Preferences > Ethernet
6Click Apply and close the window.
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Verifying Settings
Check your TCP/IP properties by clicking Applications > Utilities > Network
Utilities, and then selecting the appropriate Network interface from the Info
tab.
Figure 99 Mac OS X 10.5: Network Utility
Linux: Ubuntu 8 (GNOME)
This section shows you how to configure your computer’s TCP/IP settings in the
GNU Object Model Environment (GNOME) using the Ubuntu 8 Linux distribution.
The procedure, screens and file locations may vary depending on your specific
distribution, release version, and individual configuration. The following screens
use the default Ubuntu 8 installation.
Note: Make sure you are logged in as the root administrator.
Follow the steps below to configure your computer IP address in GNOME:
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1Click System > Administration > Network.
Figure 100 Ubuntu 8: System > Administration Menu
2When the Network Settings window opens, click Unlock to open the
Authenticate window. (By default, the Unlock button is greyed out until clicked.)
You cannot make changes to your configuration unless you first enter your admin
password.
Figure 101 Ubuntu 8: Network Settings > Connections
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3In the Authenticate window, enter your admin account name and password then
click the Authenticate button.
Figure 102 Ubuntu 8: Administrator Account Authentication
4In the Network Settings window, select the connection that you want to
configure, then click Properties.
Figure 103 Ubuntu 8: Network Settings > Connections
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5The Properties dialog box opens.
Figure 104 Ubuntu 8: Network Settings > Properties
•In the Configuration list, select Automatic Configuration (DHCP) if you
have a dynamic IP address.
•In the Configuration list, select Static IP address if you have a static IP
address. Fill in the IP address,Subnet mask, and Gateway address fields.
6Click OK to save the changes and close the Properties dialog box and return to
the Network Settings screen.
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7If you know your DNS server IP address(es), click the DNS tab in the Network
Settings window and then enter the DNS server information in the fields
provided.
Figure 105 Ubuntu 8: Network Settings > DNS
8Click the Close button to apply the changes.
Verifying Settings
Check your TCP/IP properties by clicking System > Administration > Network
Tools, and then selecting the appropriate Network device from the Devices
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tab. The Interface Statistics column shows data if your connection is working
properly.
Figure 106 Ubuntu 8: Network Tools
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Linux: openSUSE 10.3 (KDE)
This section shows you how to configure your computer’s TCP/IP settings in the K
Desktop Environment (KDE) using the openSUSE 10.3 Linux distribution. The
procedure, screens and file locations may vary depending on your specific
distribution, release version, and individual configuration. The following screens
use the default openSUSE 10.3 installation.
Note: Make sure you are logged in as the root administrator.
Follow the steps below to configure your computer IP address in the KDE:
1Click K Menu > Computer > Administrator Settings (YaST).
Figure 107 openSUSE 10.3: K Menu > Computer Menu
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2When the Run as Root - KDE su dialog opens, enter the admin password and
click OK.
Figure 108 openSUSE 10.3: K Menu > Computer Menu
3When the YaST Control Center window opens, select Network Devices and
then click the Network Card icon.
Figure 109 openSUSE 10.3: YaST Control Center
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4When the Network Settings window opens, click the Overview tab, select the
appropriate connection Name from the list, and then click the Configure button.
Figure 110 openSUSE 10.3: Network Settings
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5When the Network Card Setup window opens, click the Address tab
Figure 111 openSUSE 10.3: Network Card Setup
6Select Dynamic Address (DHCP) if you have a dynamic IP address.
Select Statically assigned IP Address if you have a static IP address. Fill in the
IP address,Subnet mask, and Hostname fields.
7Click Next to save the changes and close the Network Card Setup window.
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8If you know your DNS server IP address(es), click the Hostname/DNS tab in
Network Settings and then enter the DNS server information in the fields
provided.
Figure 112 openSUSE 10.3: Network Settings
9Click Finish to save your settings and close the window.
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Verifying Settings
Click the KNetwork Manager icon on the Task bar to check your TCP/IP
properties. From the Options sub-menu, select Show Connection Information.
Figure 113 openSUSE 10.3: KNetwork Manager
When the Connection Status - KNetwork Manager window opens, click the
Statistics tab to see if your connection is working properly.
Figure 114 openSUSE: Connection Status - KNetwork Manager
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APPENDIX C
Pop-up Windows, JavaScripts
and Java Permissions
In order to use the web configurator you need to allow:
•Web browser pop-up windows from your device.
•JavaScripts (enabled by default).
•Java permissions (enabled by default).
Note: The screens used below belong to Internet Explorer version 6, 7 and 8. Screens
for other Internet Explorer versions may vary.
Internet Explorer Pop-up Blockers
You may have to disable pop-up blocking to log into your device.
Either disable pop-up blocking (enabled by default in Windows XP SP (Service
Pack) 2) or allow pop-up blocking and create an exception for your device’s IP
address.
Disable Pop-up Blockers
1In Internet Explorer, select Tools,Pop-up Blocker and then select Turn Off
Pop-up Blocker.
Figure 115 Pop-up Blocker
You can also check if pop-up blocking is disabled in the Pop-up Blocker section in
the Privacy tab.
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1In Internet Explorer, select Tools,Internet Options,Privacy.
2Clear the Block pop-ups check box in the Pop-up Blocker section of the screen.
This disables any web pop-up blockers you may have enabled.
Figure 116 Internet Options: Privacy
3Click Apply to save this setting.
Enable Pop-up Blockers with Exceptions
Alternatively, if you only want to allow pop-up windows from your device, see the
following steps.
1In Internet Explorer, select Tools,Internet Options and then the Privacy tab.
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2Select Settings…to open the Pop-up Blocker Settings screen.
Figure 117 Internet Options: Privacy
3Type the IP address of your device (the web page that you do not want to have
blocked) with the prefix “http://”. For example, http://192.168.167.1.
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4Click Add to move the IP address to the list of Allowed sites.
Figure 118 Pop-up Blocker Settings
5Click Close to return to the Privacy screen.
6Click Apply to save this setting.
JavaScripts
If pages of the web configurator do not display properly in Internet Explorer, check
that JavaScripts are allowed.
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1In Internet Explorer, click Tools,Internet Options and then the Security tab.
Figure 119 Internet Options: Security
2Click the Custom Level... button.
3Scroll down to Scripting.
4Under Active scripting make sure that Enable is selected (the default).
5Under Scripting of Java applets make sure that Enable is selected (the
default).
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6Click OK to close the window.
Figure 120 Security Settings - Java Scripting
Java Permissions
1From Internet Explorer, click Tools,Internet Options and then the Security
tab.
2Click the Custom Level... button.
3Scroll down to Microsoft VM.
4Under Java permissions make sure that a safety level is selected.
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5Click OK to close the window.
Figure 121 Security Settings - Java
JAVA (Sun)
1From Internet Explorer, click Tools,Internet Options and then the Advanced
tab.
2Make sure that Use Java 2 for <applet> under Java (Sun) is selected.
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3Click OK to close the window.
Figure 122 Java (Sun)
Mozilla Firefox
Mozilla Firefox 2.0 screens are used here. Screens for other versions may vary
slightly. The steps below apply to Mozilla Firefox 3.0 as well.
You can enable Java, Javascripts and pop-ups in one screen. Click Tools, then
click Options in the screen that appears.
Figure 123 Mozilla Firefox: TOOLS > Options
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Click Content to show the screen below. Select the check boxes as shown in the
following screen.
Figure 124 Mozilla Firefox Content Security
Opera
Opera 10 screens are used here. Screens for other versions may vary slightly.
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Allowing Pop-Ups
From Opera, click Tools, then Preferences. In the General tab, go to Choose
how you prefer to handle pop-ups and select Open all pop-ups.
Figure 125 Opera: Allowing Pop-Ups
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Enabling Java
From Opera, click Tools, then Preferences. In the Advanced tab, select
Content from the left-side menu. Select the check boxes as shown in the
following screen.
Figure 126 Opera: Enabling Java
To customize JavaScript behavior in the Opera browser, click JavaScript Options.
Figure 127 Opera: JavaScript Options
Select the items you want Opera’s JavaScript to apply.
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APPENDIX D
IP Addresses and Subnetting
This appendix introduces IP addresses and subnet masks.
IP addresses identify individual devices on a network. Every networking device
(including computers, servers, routers, printers, etc.) needs an IP address to
communicate across the network. These networking devices are also known as
hosts.
Subnet masks determine the maximum number of possible hosts on a network.
You can also use subnet masks to divide one network into multiple sub-networks.
Introduction to IP Addresses
One part of the IP address is the network number, and the other part is the host
ID. In the same way that houses on a street share a common street name, the
hosts on a network share a common network number. Similarly, as each house
has its own house number, each host on the network has its own unique
identifying number - the host ID. Routers use the network number to send packets
to the correct network, while the host ID determines to which host on the network
the packets are delivered.
Structure
An IP address is made up of four parts, written in dotted decimal notation (for
example, 192.168.1.1). Each of these four parts is known as an octet. An octet is
an eight-digit binary number (for example 11000000, which is 192 in decimal
notation).
Therefore, each octet has a possible range of 00000000 to 11111111 in binary, or
0 to 255 in decimal.
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The following figure shows an example IP address in which the first three octets
(192.168.1) are the network number, and the fourth octet (16) is the host ID.
Figure 128 Network Number and Host ID
How much of the IP address is the network number and how much is the host ID
varies according to the subnet mask.
Subnet Masks
A subnet mask is used to determine which bits are part of the network number,
and which bits are part of the host ID (using a logical AND operation). The term
“subnet” is short for “sub-network”.
A subnet mask has 32 bits. If a bit in the subnet mask is a “1” then the
corresponding bit in the IP address is part of the network number. If a bit in the
subnet mask is “0” then the corresponding bit in the IP address is part of the host
ID.
The following example shows a subnet mask identifying the network number (in
bold text) and host ID of an IP address (192.168.1.2 in decimal).
Table 86 IP Address Network Number and Host ID Example
1ST
OCTET:
(192)
2ND
OCTET:
(168)
3RD
OCTET:
(1)
4TH
OCTET
(2)
IP Address (Binary)11000000101010000000000100000010
Subnet Mask (Binary) 111111111111111111111111 00000000
Network Number 110000001010100000000001
Host ID00000010
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By convention, subnet masks always consist of a continuous sequence of ones
beginning from the leftmost bit of the mask, followed by a continuous sequence of
zeros, for a total number of 32 bits.
Subnet masks can be referred to by the size of the network number part (the bits
with a “1” value). For example, an “8-bit mask” means that the first 8 bits of the
mask are ones and the remaining 24 bits are zeroes.
Subnet masks are expressed in dotted decimal notation just like IP addresses. The
following examples show the binary and decimal notation for 8-bit, 16-bit, 24-bit
and 29-bit subnet masks.
Network Size
The size of the network number determines the maximum number of possible
hosts you can have on your network. The larger the number of network number
bits, the smaller the number of remaining host ID bits.
An IP address with host IDs of all zeros is the IP address of the network
(192.168.1.0 with a 24-bit subnet mask, for example). An IP address with host
IDs of all ones is the broadcast address for that network (192.168.1.255 with a
24-bit subnet mask, for example).
As these two IP addresses cannot be used for individual hosts, calculate the
maximum number of possible hosts in a network as follows:
Table 87 Subnet Masks
BINARY
DECIMAL
1ST
OCTET
2ND
OCTET
3RD
OCTET
4TH
OCTET
8-bit mask 11111111 00000000 00000000 00000000 255.0.0.0
16-bit
mask 11111111 11111111 00000000 00000000 255.255.0.0
24-bit
mask 11111111 11111111 11111111 00000000 255.255.255.0
29-bit
mask 11111111 11111111 11111111 11111000 255.255.255.24
8
Table 88 Maximum Host Numbers
SUBNET MASK HOST ID SIZE MAXIMUM NUMBER OF
HOSTS
8 bits255.0.0.024 bits2
24 – 216777214
16 bits255.255.0.016 bits2
16 – 265534
24 bits255.255.255.08 bits2
8
– 2254
29 bits255.255.255.2
48 3 bits2
3
– 26
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Notation
Since the mask is always a continuous number of ones beginning from the left,
followed by a continuous number of zeros for the remainder of the 32 bit mask,
you can simply specify the number of ones instead of writing the value of each
octet. This is usually specified by writing a “/” followed by the number of bits in
the mask after the address.
For example, 192.1.1.0 /25 is equivalent to saying 192.1.1.0 with subnet mask
255.255.255.128.
The following table shows some possible subnet masks using both notations.
Subnetting
You can use subnetting to divide one network into multiple sub-networks. In the
following example a network administrator creates two sub-networks to isolate a
group of servers from the rest of the company network for security reasons.
In this example, the company network address is 192.168.1.0. The first three
octets of the address (192.168.1) are the network number, and the remaining
octet is the host ID, allowing a maximum of 28 – 2 or 254 possible hosts.
Table 89 Alternative Subnet Mask Notation
SUBNET MASK ALTERNATIVE
NOTATION
LAST OCTET
(BINARY)
LAST OCTET
(DECIMAL)
255.255.255.0 /24 0000 0000 0
255.255.255.128 /25 1000 0000 128
255.255.255.192 /26 1100 0000 192
255.255.255.224 /27 1110 0000 224
255.255.255.240 /28 1111 0000 240
255.255.255.248 /29 1111 1000 248
255.255.255.252 /30 1111 1100 252
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The following figure shows the company network before subnetting.
Figure 129 Subnetting Example: Before Subnetting
You can “borrow” one of the host ID bits to divide the network 192.168.1.0 into
two separate sub-networks. The subnet mask is now 25 bits (255.255.255.128 or
/25).
The “borrowed” host ID bit can have a value of either 0 or 1, allowing two
subnets; 192.168.1.0 /25 and 192.168.1.128 /25.
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The following figure shows the company network after subnetting. There are now
two sub-networks, A and B.
Figure 130 Subnetting Example: After Subnetting
In a 25-bit subnet the host ID has 7 bits, so each sub-network has a maximum of
27 – 2 or 126 possible hosts (a host ID of all zeroes is the subnet’s address itself,
all ones is the subnet’s broadcast address).
192.168.1.0 with mask 255.255.255.128 is subnet A itself, and 192.168.1.127
with mask 255.255.255.128 is its broadcast address. Therefore, the lowest IP
address that can be assigned to an actual host for subnet A is 192.168.1.1 and
the highest is 192.168.1.126.
Similarly, the host ID range for subnet B is 192.168.1.129 to 192.168.1.254.
Example: Four Subnets
The previous example illustrated using a 25-bit subnet mask to divide a 24-bit
address into two subnets. Similarly, to divide a 24-bit address into four subnets,
you need to “borrow” two host ID bits to give four possible combinations (00, 01,
10 and 11). The subnet mask is 26 bits
(11111111.11111111.11111111.11000000) or 255.255.255.192.
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Each subnet contains 6 host ID bits, giving 26 - 2 or 62 hosts for each subnet (a
host ID of all zeroes is the subnet itself, all ones is the subnet’s broadcast
address).
Table 90 Subnet 1
IP/SUBNET MASK NETWORK NUMBER LAST OCTET BIT
VALUE
IP Address (Decimal) 192.168.1. 0
IP Address (Binary) 11000000.10101000.00000001. 00000000
Subnet Mask (Binary) 11111111.11111111.11111111. 11000000
Subnet Address:
192.168.1.0 Lowest Host ID: 192.168.1.1
Broadcast Address:
192.168.1.63 Highest Host ID: 192.168.1.62
Table 91 Subnet 2
IP/SUBNET MASK NETWORK NUMBER LAST OCTET BIT
VALUE
IP Address 192.168.1. 64
IP Address (Binary) 11000000.10101000.00000001. 01000000
Subnet Mask (Binary) 11111111.11111111.11111111. 11000000
Subnet Address:
192.168.1.64 Lowest Host ID: 192.168.1.65
Broadcast Address:
192.168.1.127 Highest Host ID: 192.168.1.126
Table 92 Subnet 3
IP/SUBNET MASK NETWORK NUMBER LAST OCTET BIT
VALUE
IP Address 192.168.1. 128
IP Address (Binary) 11000000.10101000.00000001. 10000000
Subnet Mask (Binary) 11111111.11111111.11111111. 11000000
Subnet Address:
192.168.1.128 Lowest Host ID: 192.168.1.129
Broadcast Address:
192.168.1.191 Highest Host ID: 192.168.1.190
Table 93 Subnet 4
IP/SUBNET MASK NETWORK NUMBER LAST OCTET BIT
VALUE
IP Address 192.168.1. 192
IP Address (Binary) 11000000.10101000.00000001
.11000000
Subnet Mask (Binary) 11111111.11111111.11111111
.11000000
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Example: Eight Subnets
Similarly, use a 27-bit mask to create eight subnets (000, 001, 010, 011, 100,
101, 110 and 111).
The following table shows IP address last octet values for each subnet.
Subnet Planning
The following table is a summary for subnet planning on a network with a 24-bit
network number.
Subnet Address:
192.168.1.192 Lowest Host ID: 192.168.1.193
Broadcast Address:
192.168.1.255 Highest Host ID: 192.168.1.254
Table 93 Subnet 4 (continued)
IP/SUBNET MASK NETWORK NUMBER LAST OCTET BIT
VALUE
Table 94 Eight Subnets
SUBNET SUBNET
ADDRESS FIRST ADDRESS LAST
ADDRESS
BROADCAST
ADDRESS
10130 31
2 32 33 62 63
3 64 65 94 95
4 96 97 126 127
5 128 129 158 159
6 160 161 190 191
7 192 193 222 223
8 224 225 254 255
Table 95 24-bit Network Number Subnet Planning
NO. “BORROWED”
HOST BITS SUBNET MASK NO. SUBNETS NO. HOSTS PER
SUBNET
1255.255.255.128 (/25) 2 126
2 255.255.255.192 (/26) 4 62
3 255.255.255.224 (/27) 8 30
4 255.255.255.240 (/28) 16 14
5 255.255.255.248 (/29) 32 6
6 255.255.255.252 (/30) 64 2
7 255.255.255.254 (/31) 128 1
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The following table is a summary for subnet planning on a network with a 16-bit
network number.
Configuring IP Addresses
Where you obtain your network number depends on your particular situation. If
the ISP or your network administrator assigns you a block of registered IP
addresses, follow their instructions in selecting the IP addresses and the subnet
mask.
If the ISP did not explicitly give you an IP network number, then most likely you
have a single user account and the ISP will assign you a dynamic IP address when
the connection is established. If this is the case, it is recommended that you select
a network number from 192.168.0.0 to 192.168.255.0. The Internet Assigned
Number Authority (IANA) reserved this block of addresses specifically for private
use; please do not use any other number unless you are told otherwise. You must
also enable Network Address Translation (NAT) on the OX253P.
Once you have decided on the network number, pick an IP address for your
OX253P that is easy to remember (for instance, 192.168.1.1) but make sure that
no other device on your network is using that IP address.
The subnet mask specifies the network number portion of an IP address. Your
OX253P will compute the subnet mask automatically based on the IP address that
Table 96 16-bit Network Number Subnet Planning
NO. “BORROWED”
HOST BITS SUBNET MASK NO. SUBNETS NO. HOSTS PER
SUBNET
1255.255.128.0 (/17) 2 32766
2 255.255.192.0 (/18) 4 16382
3 255.255.224.0 (/19) 8 8190
4255.255.240.0 (/20) 16 4094
5255.255.248.0 (/21) 32 2046
6255.255.252.0 (/22) 64 1022
7255.255.254.0 (/23) 128 510
8 255.255.255.0 (/24) 256 254
9 255.255.255.128 (/25) 512 126
10 255.255.255.192 (/26) 1024 62
11 255.255.255.224 (/27) 2048 30
12 255.255.255.240 (/28) 4096 14
13 255.255.255.248 (/29) 8192 6
14 255.255.255.252 (/30) 16384 2
15 255.255.255.254 (/31) 32768 1
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you entered. You don't need to change the subnet mask computed by the OX253P
unless you are instructed to do otherwise.
Private IP Addresses
Every machine on the Internet must have a unique address. If your networks are
isolated from the Internet (running only between two branch offices, for example)
you can assign any IP addresses to the hosts without problems. However, the
Internet Assigned Numbers Authority (IANA) has reserved the following three
blocks of IP addresses specifically for private networks:
•10.0.0.0 — 10.255.255.255
•172.16.0.0 — 172.31.255.255
•192.168.0.0 — 192.168.255.255
You can obtain your IP address from the IANA, from an ISP, or it can be assigned
from a private network. If you belong to a small organization and your Internet
access is through an ISP, the ISP can provide you with the Internet addresses for
your local networks. On the other hand, if you are part of a much larger
organization, you should consult your network administrator for the appropriate IP
addresses.
Regardless of your particular situation, do not create an arbitrary IP address;
always follow the guidelines above. For more information on address assignment,
please refer to RFC 1597, Address Allocation for Private Internets and RFC 1466,
Guidelines for Management of IP Address Space.
IP Address Conflicts
Each device on a network must have a unique IP address. Devices with duplicate
IP addresses on the same network will not be able to access the Internet or other
resources. The devices may also be unreachable through the network.
Conflicting Computer IP Addresses Example
More than one device can not use the same IP address. In the following example
computer Ahas a static (or fixed) IP address that is the same as the IP address
that a DHCP server assigns to computer B which is a DHCP client. Neither can
access the Internet. This problem can be solved by assigning a different static IP
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address to computer A or setting computer A to obtain an IP address
automatically.
Figure 131 Conflicting Computer IP Addresses Example
Conflicting Router IP Addresses Example
Since a router connects different networks, it must have interfaces using different
network numbers. For example, if a router is set between a LAN and the Internet
(WAN), the router’s LAN and WAN addresses must be on different subnets. In the
following example, the LAN and WAN are on the same subnet. The LAN computers
cannot access the Internet because the router cannot route between networks.
Figure 132 Conflicting Computer IP Addresses Example
Conflicting Computer and Router IP Addresses Example
More than one device can not use the same IP address. In the following example,
the computer and the router’s LAN port both use 192.168.1.1 as the IP address.
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240
The computer cannot access the Internet. This problem can be solved by
assigning a different IP address to the computer or the router’s LAN port.
Figure 133 Conflicting Computer and Router IP Addresses Example
OX253P User’s Guide 241
APPENDIX E
Importing Certificates
This appendix shows you how to import public key certificates into your web
browser.
Public key certificates are used by web browsers to ensure that a secure web site
is legitimate. When a certificate authority such as VeriSign, Comodo, or Network
Solutions, to name a few, receives a certificate request from a website operator,
they confirm that the web domain and contact information in the request match
those on public record with a domain name registrar. If they match, then the
certificate is issued to the website operator, who then places it on the site to be
issued to all visiting web browsers to let them know that the site is legitimate.
Public key certificates can be used by web browsers on a LAN or WAN to verify
that they are in fact connecting to the legitimate device and not one
masquerading as it. However, because the certificates were not issued by one of
the several organizations officially recognized by the most common web browsers,
you will need to import the created certificate into your web browser and flag that
certificate as a trusted authority.
Note: You can see if you are browsing on a secure website if the URL in your web
browser’s address bar begins with https:// or there is a sealed padlock
icon () somewhere in the main browser window (not all browsers show the
padlock in the same location.)
In this appendix, you can import a public key certificate for:
•Internet Explorer on page 242
•Firefox on page 252
•Opera on page 258
•Konqueror on page 266
Appendix EImporting Certificates
OX253P User’s Guide
242
Internet Explorer
The following example uses Microsoft Internet Explorer 7 on Windows XP
Professional; however, they can also apply to Internet Explorer on Windows Vista.
1If your device’s web configurator is set to use SSL certification, then the first time
you browse to it you are presented with a certification error.
Figure 134 Internet Explorer 7: Certification Error
2Click Continue to this website (not recommended).
Figure 135 Internet Explorer 7: Certification Error
Appendix EImporting Certificates
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3In the Address Bar, click Certificate Error > View certificates.
Figure 136 Internet Explorer 7: Certificate Error
4In the Certificate dialog box, click Install Certificate.
Figure 137 Internet Explorer 7: Certificate
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5In the Certificate Import Wizard, click Next.
Figure 138 Internet Explorer 7: Certificate Import Wizard
6If you want Internet Explorer to Automatically select certificate store based
on the type of certificate, click Next again and then go to step 9.
Figure 139 Internet Explorer 7: Certificate Import Wizard
Appendix EImporting Certificates
OX253P User’s Guide 245
7Otherwise, select Place all certificates in the following store and then click
Browse.
Figure 140 Internet Explorer 7: Certificate Import Wizard
8In the Select Certificate Store dialog box, choose a location in which to save the
certificate and then click OK.
Figure 141 Internet Explorer 7: Select Certificate Store
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9In the Completing the Certificate Import Wizard screen, click Finish.
Figure 142 Internet Explorer 7: Certificate Import Wizard
10 If you are presented with another Security Warning, click Yes.
Figure 143 Internet Explorer 7: Security Warning
Appendix EImporting Certificates
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11 Finally, click OK when presented with the successful certificate installation
message.
Figure 144 Internet Explorer 7: Certificate Import Wizard
12 The next time you start Internet Explorer and go to a web configurator page, a
sealed padlock icon appears in the address bar. Click it to view the page’s
Website Identification information.
Figure 145 Internet Explorer 7: Website Identification
Appendix EImporting Certificates
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248
Installing a Stand-Alone Certificate File in Internet Explorer
Rather than browsing to a web configurator and installing a public key certificate
when prompted, you can install a stand-alone certificate file if one has been issued
to you.
1Double-click the public key certificate file.
Figure 146 Internet Explorer 7: Public Key Certificate File
2In the security warning dialog box, click Open.
Figure 147 Internet Explorer 7: Open File - Security Warning
3Refer to steps 4-12 in the Internet Explorer procedure beginning on page242 to
complete the installation process.
Appendix EImporting Certificates
OX253P User’s Guide 249
Removing a Certificate in Internet Explorer
This section shows you how to remove a public key certificate in Internet Explorer
7.
1Open Internet Explorer and click TOOLS >Internet Options.
Figure 148 Internet Explorer 7: Tools Menu
2In the Internet Options dialog box, click Content >Certificates.
Figure 149 Internet Explorer 7: Internet Options
Appendix EImporting Certificates
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3In the Certificates dialog box, click the Trusted Root Certificates Authorities
tab, select the certificate that you want to delete, and then click Remove.
Figure 150 Internet Explorer 7: Certificates
4In the Certificates confirmation, click Yes.
Figure 151 Internet Explorer 7: Certificates
5In the Root Certificate Store dialog box, click Yes.
Figure 152 Internet Explorer 7: Root Certificate Store
Appendix EImporting Certificates
OX253P User’s Guide 251
6The next time you go to the web site that issued the public key certificate you just
removed, a certification error appears.
Appendix EImporting Certificates
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252
Firefox
The following example uses Mozilla Firefox 2 on Windows XP Professional;
however, the screens can also apply to Firefox 2 on all platforms.
1If your device’s web configurator is set to use SSL certification, then the first time
you browse to it you are presented with a certification error.
2Select Accept this certificate permanently and click OK.
Figure 153 Firefox 2: Website Certified by an Unknown Authority
Appendix EImporting Certificates
OX253P User’s Guide 253
3The certificate is stored and you can now connect securely to the web configurator.
A sealed padlock appears in the address bar, which you can click to open the Page
Info > Security window to view the web page’s security information.
Figure 154 Firefox 2: Page Info
Appendix EImporting Certificates
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Installing a Stand-Alone Certificate File in Firefox
Rather than browsing to a web configurator and installing a public key certificate
when prompted, you can install a stand-alone certificate file if one has been issued
to you.
1Open Firefox and click TOOLS > Options.
Figure 155 Firefox 2: Tools Menu
2In the Options dialog box, click ADVANCED >Encryption > View Certificates.
Figure 156 Firefox 2: Options
Appendix EImporting Certificates
OX253P User’s Guide 255
3In the Certificate Manager dialog box, click Web Sites > Import.
Figure 157 Firefox 2: Certificate Manager
4Use the Select File dialog box to locate the certificate and then click Open.
Figure 158 Firefox 2: Select File
5The next time you visit the web site, click the padlock in the address bar to open
the Page Info > Security window to see the web page’s security information.
Appendix EImporting Certificates
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256
Removing a Certificate in Firefox
This section shows you how to remove a public key certificate in Firefox 2.
1Open Firefox and click TOOLS >Options.
Figure 159 Firefox 2: Tools Menu
2In the Options dialog box, click ADVANCED >Encryption > View Certificates.
Figure 160 Firefox 2: Options
Appendix EImporting Certificates
OX253P User’s Guide 257
3In the Certificate Manager dialog box, select the Web Sites tab, select the
certificate that you want to remove, and then click Delete.
Figure 161 Firefox 2: Certificate Manager
4In the Delete Web Site Certificates dialog box, click OK.
Figure 162 Firefox 2: Delete Web Site Certificates
5The next time you go to the web site that issued the public key certificate you just
removed, a certification error appears.
Appendix EImporting Certificates
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258
Opera
The following example uses Opera 9 on Windows XP Professional; however, the
screens can apply to Opera 9 on all platforms.
1If your device’s web configurator is set to use SSL certification, then the first time
you browse to it you are presented with a certification error.
2Click Install to accept the certificate.
Figure 163 Opera 9: Certificate signer not found
Appendix EImporting Certificates
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3The next time you visit the web site, click the padlock in the address bar to open
the Security information window to view the web page’s security details.
Figure 164 Opera 9: Security information
Appendix EImporting Certificates
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260
Installing a Stand-Alone Certificate File in Opera
Rather than browsing to a web configurator and installing a public key certificate
when prompted, you can install a stand-alone certificate file if one has been issued
to you.
1Open Opera and click TOOLS >Preferences.
Figure 165 Opera 9: Tools Menu
Appendix EImporting Certificates
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2In Preferences, click ADVANCED >Security > Manage certificates.
Figure 166 Opera 9: Preferences
Appendix EImporting Certificates
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262
3In the Certificates Manager, click Authorities > Import.
Figure 167 Opera 9: Certificate manager
4Use the Import certificate dialog box to locate the certificate and then click
Open.
Figure 168 Opera 9: Import certificate
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5In the Install authority certificate dialog box, click Install.
Figure 169 Opera 9: Install authority certificate
6Next, click OK.
Figure 170 Opera 9: Install authority certificate
7The next time you visit the web site, click the padlock in the address bar to open
the Security information window to view the web page’s security details.
Appendix EImporting Certificates
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264
Removing a Certificate in Opera
This section shows you how to remove a public key certificate in Opera 9.
1Open Opera and click TOOLS >Preferences.
Figure 171 Opera 9: Tools Menu
2In Preferences,ADVANCED >Security > Manage certificates.
Figure 172 Opera 9: Preferences
Appendix EImporting Certificates
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3In the Certificates manager, select the Authorities tab, select the certificate
that you want to remove, and then click Delete.
Figure 173 Opera 9: Certificate manager
4The next time you go to the web site that issued the public key certificate you just
removed, a certification error appears.
Note: There is no confirmation when you delete a certificate authority, so be
absolutely certain that you want to go through with it before clicking the button.
Appendix EImporting Certificates
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266
Konqueror
The following example uses Konqueror 3.5 on openSUSE 10.3, however the
screens apply to Konqueror 3.5 on all Linux KDE distributions.
1If your device’s web configurator is set to use SSL certification, then the first time
you browse to it you are presented with a certification error.
2Click Continue.
Figure 174 Konqueror 3.5: Server Authentication
3Click Forever when prompted to accept the certificate.
Figure 175 Konqueror 3.5: Server Authentication
Appendix EImporting Certificates
OX253P User’s Guide 267
4Click the padlock in the address bar to open the KDE SSL Information window
and view the web page’s security details.
Figure 176 Konqueror 3.5: KDE SSL Information
Appendix EImporting Certificates
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268
Installing a Stand-Alone Certificate File in Konqueror
Rather than browsing to a web configurator and installing a public key certificate
when prompted, you can install a stand-alone certificate file if one has been issued
to you.
1Double-click the public key certificate file.
Figure 177 Konqueror 3.5: Public Key Certificate File
2In the Certificate Import Result - Kleopatra dialog box, click OK.
Figure 178 Konqueror 3.5: Certificate Import Result
The public key certificate appears in the KDE certificate manager, Kleopatra.
Figure 179 Konqueror 3.5: Kleopatra
Appendix EImporting Certificates
OX253P User’s Guide 269
3The next time you visit the web site, click the padlock in the address bar to open
the KDE SSL Information window to view the web page’s security details.
Appendix EImporting Certificates
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270
Removing a Certificate in Konqueror
This section shows you how to remove a public key certificate in Konqueror 3.5.
1Open Konqueror and click Settings > Configure Konqueror.
Figure 180 Konqueror 3.5: Settings Menu
2In the Configure dialog box, select Crypto.
3On the Peer SSL Certificates tab, select the certificate you want to delete and
then click Remove.
Figure 181 Konqueror 3.5: Configure
4The next time you go to the web site that issued the public key certificate you just
removed, a certification error appears.
Note: There is no confirmation when you remove a certificate authority, so be
absolutely certain you want to go through with it before clicking the button.
OX253P User’s Guide 271
APPENDIX F
Common Services
The following table lists some commonly-used services and their associated
protocols and port numbers. For a comprehensive list of port numbers, ICMP type/
code numbers and services, visit the IANA (Internet Assigned Number Authority)
web site.
•Name: This is a short, descriptive name for the service. You can use this one or
create a different one, if you like.
•Protocol: This is the type of IP protocol used by the service. If this is TCP/
UDP, then the service uses the same port number with TCP and UDP. If this is
USER-DEFINED, the Port(s) is the IP protocol number, not the port number.
•Port(s): This value depends on the Protocol. Please refer to RFC 1700 for
further information about port numbers.
•If the Protocol is TCP,UDP, or TCP/UDP, this is the IP port number.
•If the Protocol is USER, this is the IP protocol number.
•Description: This is a brief explanation of the applications that use this service
or the situations in which this service is used.
Table 97 Commonly Used Services
NAME PROTOCOL PORT(S) DESCRIPTION
AH
(IPSEC_TUNNEL) User-Defined 51 The IPSEC AH (Authentication
Header) tunneling protocol uses this
service.
AIM/New-ICQ TCP 5190 AOL’s Internet Messenger service. It
is also used as a listening port by
ICQ.
AUTH TCP 113 Authentication protocol used by some
servers.
BGP TCP 179 Border Gateway Protocol.
BOOTP_CLIENT UDP 68 DHCP Client.
BOOTP_SERVER UDP 67 DHCP Server.
CU-SEEME TCP
UDP
7648
24032
A popular videoconferencing solution
from White Pines Software.
DNS TCP/UDP 53 Domain Name Server, a service that
matches web names to IP numbers.
ESP
(IPSEC_TUNNEL) User-Defined 50 The IPSEC ESP (Encapsulation
Security Protocol) tunneling protocol
uses this service.
Appendix FCommon Services
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272
FINGER TCP 79 Finger is a UNIX or Internet related
command that can be used to find out
if a user is logged on.
FTP TCP
TCP
20
21
File Transfer Program, a program to
enable fast transfer of files, including
large files that may not be possible by
e-mail.
H.323 TCP 1720 NetMeeting uses this protocol.
HTTP TCP 80 Hyper Text Transfer Protocol - a
client/server protocol for the world
wide web.
HTTPS TCP 443 HTTPS is a secured http session often
used in e-commerce.
ICMP User-Defined 1 Internet Control Message Protocol is
often used for diagnostic or routing
purposes.
ICQ UDP 4000 This is a popular Internet chat
program.
IGMP
(MULTICAST) User-Defined 2 Internet Group Management Protocol
is used when sending packets to a
specific group of hosts.
IKE UDP 500 The Internet Key Exchange algorithm
is used for key distribution and
management.
IRC TCP/UDP 6667 This is another popular Internet chat
program.
MSN Messenger TCP 1863 Microsoft Networks’ messenger
service uses this protocol.
NEW-ICQ TCP 5190 An Internet chat program.
NEWS TCP 144 A protocol for news groups.
NFS UDP 2049 Network File System - NFS is a client/
server distributed file service that
provides transparent file sharing for
network environments.
NNTP TCP 119 Network News Transport Protocol is
the delivery mechanism for the
USENET newsgroup service.
PING User-Defined 1 Packet INternet Groper is a protocol
that sends out ICMP echo requests to
test whether or not a remote host is
reachable.
POP3 TCP 110 Post Office Protocol version 3 lets a
client computer get e-mail from a
POP3 server through a temporary
connection (TCP/IP or other).
Table 97 Commonly Used Services (continued)
NAME PROTOCOL PORT(S) DESCRIPTION
Appendix FCommon Services
OX253P User’s Guide 273
PPTP TCP 1723 Point-to-Point Tunneling Protocol
enables secure transfer of data over
public networks. This is the control
channel.
PPTP_TUNNEL
(GRE) User-Defined 47 PPTP (Point-to-Point Tunneling
Protocol) enables secure transfer of
data over public networks. This is the
data channel.
RCMD TCP 512 Remote Command Service.
REAL_AUDIO TCP 7070 A streaming audio service that
enables real time sound over the web.
REXEC TCP 514 Remote Execution Daemon.
RLOGIN TCP 513 Remote Login.
RTELNET TCP 107 Remote Telnet.
RTSP TCP/UDP 554 The Real Time Streaming (media
control) Protocol (RTSP) is a remote
control for multimedia on the
Internet.
SFTP TCP 115 Simple File Transfer Protocol.
SMTP TCP 25 Simple Mail Transfer Protocol is the
message-exchange standard for the
Internet. SMTP enables you to move
messages from one e-mail server to
another.
SNMP TCP/UDP 161 Simple Network Management
Program.
SNMP-TRAPS TCP/UDP 162 Traps for use with the SNMP
(RFC:1215).
SQL-NET TCP 1521 Structured Query Language is an
interface to access data on many
different types of database systems,
including mainframes, midrange
systems, UNIX systems and network
servers.
SSH TCP/UDP 22 Secure Shell Remote Login Program.
STRM WORKS UDP 1558 Stream Works Protocol.
SYSLOG UDP 514 Syslog allows you to send system logs
to a UNIX server.
TACACS UDP 49 Login Host Protocol used for (Terminal
Access Controller Access Control
System).
TELNET TCP 23 Telnet is the login and terminal
emulation protocol common on the
Internet and in UNIX environments. It
operates over TCP/IP networks. Its
primary function is to allow users to
log into remote host systems.
Table 97 Commonly Used Services (continued)
NAME PROTOCOL PORT(S) DESCRIPTION
Appendix FCommon Services
OX253P User’s Guide
274
TFTP UDP 69 Trivial File Transfer Protocol is an
Internet file transfer protocol similar
to FTP, but uses the UDP (User
Datagram Protocol) rather than TCP
(Transmission Control Protocol).
VDOLIVE TCP 7000 Another videoconferencing solution.
Table 97 Commonly Used Services (continued)
NAME PROTOCOL PORT(S) DESCRIPTION
Index
OX253P User’s Guide 275
Index
Numbers
16QAM 171
A
AAA 67
accounting server
see AAA
ACS, see Auto Configuration Server
activity 67
Advanced Encryption Standard
see AES
AES 187
ALG 85
alternative subnet mask notation 232
application
CWMP-TR-069 142
Application Layer Gateway
see ALG
authentication 31,67,69,185
inner 188
key
server 67
types 188
authorization 185
request and reply 187
server 67
Auto Configuration Server 142
B
base station
see BS
BS 65–66
links 66
buzzer 74
buzzer and ODU LEDs 75
buzzer and RSSI 75
C
CA 97,114
and certificates 114
CBC-MAC 187
CCMP 185,187
cell 65
Certificate Management Protocol (CMP) 102
Certificate Revocation List (CRL) 114
certificates 97,185
advantages 115
and CA 114
certification path 105,111,114
expired 114
factory-default 115
file formats 115
fingerprints 106,112
importing 99
not used for encryption 114
revoked 114
self-signed 101
serial number 105,111
storage space 98
thumbprint algorithms 117
thumbprints 117
used for authentication 114
verification 187
verifying fingerprints 116
certification
authority, see CA
requests 97,101,102
chaining 187
chaining message authentication
see CCMP
CMAC
see MAC
counter mode
see CCMP
Index
OX253P User’s Guide
276
coverage area 65
cryptography 185
CWMP-TR-069 142
D
data 185–187
decryption 185
encryption 185
flow 187
DHCP 54,88,90
client 88
server 54
diameter 67
digital ID 185
DL frequency 73,74
domain name 88
download frequency
see DL frequency
dynamic DNS 90
Dynamic Host Configuration Protocol
see DHCP
E
EAP 67
encryption 185–187
traffic 187
Ethernet
encapsulation 78
Extensible Authorization Protocol
see EAP
Extensible Markup Language, see XML
F
firewall 119,124,125
frequency
band 74
ranges 73,74
scanning 74
FTP 90,134
restrictions 134
I
IANA 238
identity 67,185
idle timeout 134
IEEE 802.16 65,185
IEEE 802.16e 65
inner authentication 188
Internet
access 67
Internet Assigned Numbers Authority
see IANA 238
interoperability 65
K
key 31,69,185
request and reply 187
M
MAC 187
MAN 65
Management Information Base (MIB) 138
manual site survey 73,74
Message Authentication Code
see MAC
message integrity 187
Metropolitan Area Network
see MAN
microwave 65,66
mobile station
see MS
modulation 171
MS 66
My Certificates 98
see also certificates
Index
OX253P User’s Guide 277
N
NAT 237
and remote management 134
server sets 78
network
activity 67
services 67
O
ODU LEDs and buzzer 75
P
pattern-spotting 187
PKMv2 31,67,69,185,188
plain text encryption 187
Privacy Key Management
see PKM
private key 185
public certificate 187
public key 31,69,185
Public-Key Infrastructure (PKI) 114
public-private key pairs 97,114
Q
QoS 145
QPSK 171
Quality of Service, see QoS
R
radio frequency of WiMAX 66
RADIUS 67,186
Message Types 186
Messages 186
Shared Secret Key 186
related documentation 3
remote management and NAT 134
remote management limitations 134
Remote Procedure Call 142
RFC 2510. See Certificate Management
Protocol.
RSSI and buzzer 75
S
safety warnings 6
secure communication 31,69,185
secure connection 67
security 185
security association 187
see SA
services 67
Simple Certificate Enrollment Protocol
(SCEP) 102
SIP
ALG 85
Application Layer Gateway, see ALG
SNMP 135
manager 137
spectrum range of WiMAX 66
SS 65,66
stateful inspection 124
subnet 229
mask 230
subnetting 232
subscriber station
see SS
syntax conventions 4
system timeout 134
T
tampering
TCP/IP configuration 54
TEK 187
TFTP restrictions 134
TLS 31,69,185
transport encryption key
Index
OX253P User’s Guide
278
see TEK
transport layer security
see TLS
triangle route
problem 125
solutions 126
trigger port forwarding
process 84
TTLS 31,69,185,188
tunneled TLS
see TTLS
U
unauthorized device 185
user authentication 185
user name 91
V
verification 187
W
WiMAX
radio frequency 66
security 187
spectrum range 66
WiMAX Forum 65
Wireless Interoperability for Microwave Access
see WiMAX
Wireless Metropolitan Area Network
see MAN
wireless network
access 65
standard 65
wireless security 185
wizard setup 29
X
XML 142
Index
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Index
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280