ZyXEL Communications NWA1100NH 802.11 b/g/n PoE Access Point User Manual Book

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NWA1000 Series
NWA 1100-NH / 1121-NI / 1123-NI / 1123-AC
WLAN PoE Access Points
Version 2.00
Edition 1, 06/2014
Quick Start Guide
User’s Guide
Default Login Details
LAN IP Address
http://192.168.1.2
User Name
www.zyxel.com
Password
admin
1234
Copyright © 2014 ZyXEL Communications Corporation
IMPORTANT!
READ CAREFULLY BEFORE USE.
KEEP THIS GUIDE FOR FUTURE REFERENCE.
This is a User’s Guide for a series of products. Not all products support all firmware features.
Screenshots and graphics in this book may differ slightly from your product due to differences in
your product firmware or your computer operating system. Every effort has been made to ensure
that the information in this manual is accurate.
Related Documentation
Quick Start Guide. The Quick Start Guide shows how to connect the NWA and access the Web
Configurator.
NWA1000 Series User’s Guide
Contents Overview
Contents Overview
User’s Guide .........................................................................................................................................8
Introducing the NWA .................................................................................................................................9
Introducing the Web Configurator ...........................................................................................................18
Dashboard ...............................................................................................................................................24
Tutorial ....................................................................................................................................................28
Technical Reference ..........................................................................................................................45
Monitor ....................................................................................................................................................46
Wireless LAN ..........................................................................................................................................51
LAN and VLAN ........................................................................................................................................87
System ....................................................................................................................................................92
Log Settings ..........................................................................................................................................105
Maintenance ..........................................................................................................................................109
Troubleshooting .................................................................................................................................... 117
NWA1000 Series User’s Guide
Table of Contents
Table of Contents
Contents Overview ..............................................................................................................................3
Table of Contents .................................................................................................................................4
Part I: User’s Guide ........................................................................................... 8
Chapter 1
Introducing the NWA ............................................................................................................................9
1.1 Introducing the NWA ...........................................................................................................................9
1.1.1 Dual-Band ..................................................................................................................................9
1.2 Wireless Modes .................................................................................................................................10
1.2.1 MBSSID ...................................................................................................................................10
1.2.2 Wireless Client ......................................................................................................................... 11
1.2.3 Root AP ...................................................................................................................................13
1.2.4 Repeater ..................................................................................................................................13
1.3 Ways to Manage the NWA ................................................................................................................14
1.4 Configuring Your NWA’s Security Features .......................................................................................15
1.4.1 Control Access to Your Device ................................................................................................15
1.4.2 Wireless Security .....................................................................................................................15
1.5 Good Habits for Managing the NWA .................................................................................................15
1.6 Hardware Connections ......................................................................................................................16
1.7 LED ...................................................................................................................................................16
Chapter 2
Introducing the Web Configurator ....................................................................................................18
2.1 Overview ...........................................................................................................................................18
2.2 Accessing the Web Configurator .......................................................................................................18
2.3 Resetting the NWA ............................................................................................................................20
2.3.1 Methods of Restoring Factory-Defaults ...................................................................................20
2.4 Navigating the Web Configurator ......................................................................................................21
2.4.1 Title Bar ...................................................................................................................................21
2.4.2 Navigation Panel .....................................................................................................................22
2.4.3 Main Window ...........................................................................................................................23
Chapter 3
Dashboard ...........................................................................................................................................24
3.1 The Dashboard Screen .....................................................................................................................24
NWA1000 Series User’s Guide
Table of Contents
Chapter 4
Tutorial .................................................................................................................................................28
4.1 How to Configure the Wireless LAN ..................................................................................................28
4.1.1 Choosing the Wireless Mode ...................................................................................................28
4.1.2 Further Reading .......................................................................................................................28
4.2 How to Configure Multiple Wireless Networks ..................................................................................28
4.2.1 Configure the SSID Profiles .....................................................................................................30
4.2.2 Configure the Standard Network .............................................................................................32
4.2.3 Configure the VoIP Network ....................................................................................................33
4.2.4 Configure the Guest Network ..................................................................................................35
4.2.5 Testing the Wireless Networks ................................................................................................37
4.3 NWA Setup in AP and Wireless Client Modes ..................................................................................37
4.3.1 Scenario ..................................................................................................................................37
4.3.2 Configuring the NWA in MBSSID or Root AP Mode ................................................................38
4.3.3 Configuring the NWA in Wireless Client Mode ........................................................................41
4.3.4 MAC Filter Setup .....................................................................................................................43
4.3.5 Testing the Connection and Troubleshooting ..........................................................................44
Part II: Technical Reference............................................................................ 45
Chapter 5
Monitor.................................................................................................................................................46
5.1 Overview ...........................................................................................................................................46
5.2 What You Can Do .............................................................................................................................46
5.3 View Logs .........................................................................................................................................46
5.4 Statistics ............................................................................................................................................47
5.5 Association List .................................................................................................................................48
5.6 Channel Usage .................................................................................................................................49
Chapter 6
Wireless LAN.......................................................................................................................................51
6.1 Overview ...........................................................................................................................................51
6.2 What You Can Do in this Chapter .....................................................................................................51
6.3 What You Need To Know ..................................................................................................................52
6.4 Wireless Settings Screen ..................................................................................................................56
6.4.1 Root AP Mode .........................................................................................................................57
6.4.2 Repeater Mode ........................................................................................................................61
6.4.3 Wireless Client Mode ...............................................................................................................64
6.4.4 MBSSID Mode .........................................................................................................................67
6.5 SSID Screen .....................................................................................................................................70
6.5.1 Configuring SSID .....................................................................................................................71
NWA1000 Series User’s Guide
Table of Contents
6.6 Wireless Security Screen ..................................................................................................................72
6.6.1 Security: WEP .........................................................................................................................74
6.6.2 Security: WPA2, WPA2-MIX ....................................................................................................75
6.6.3 Security: WPA2-PSK, WPA2-PSK-MIX ...................................................................................77
6.7 RADIUS Screen ................................................................................................................................78
6.8 Layer-2 Isolation ................................................................................................................................80
6.8.1 Layer-2 Isolation Screen ..........................................................................................................81
6.9 MAC Filter Screen .............................................................................................................................82
6.10 Technical Reference ........................................................................................................................84
6.10.1 Additional Wireless Terms .....................................................................................................84
6.10.2 WMM QoS .............................................................................................................................85
6.10.3 Security Mode Guideline .......................................................................................................86
Chapter 7
LAN and VLAN ....................................................................................................................................87
7.1 LAN Overview ...................................................................................................................................87
7.2 What You Can Do in the LAN IP Screen ...........................................................................................87
7.3 What You Need to Know ...................................................................................................................87
7.4 VLAN Overview .................................................................................................................................89
7.5 What You Need to Know ...................................................................................................................89
7.6 LAN IP Screen ..................................................................................................................................90
Chapter 8
System .................................................................................................................................................92
8.1 Overview ...........................................................................................................................................92
8.2 What You Can Do in this Chapter .....................................................................................................92
8.3 What You Need To Know ..................................................................................................................93
8.4 WWW Screen ....................................................................................................................................95
8.5 Certificates Screen ............................................................................................................................96
8.6 Telnet Screen ....................................................................................................................................97
8.7 SNMP Screen ...................................................................................................................................99
8.8 FTP Screen .....................................................................................................................................101
8.9 Technical Reference ........................................................................................................................102
8.9.1 MIB ........................................................................................................................................102
8.9.2 Supported MIBs .....................................................................................................................103
8.9.3 Private-Public Certificates .....................................................................................................103
8.9.4 Certification Authorities ..........................................................................................................103
8.9.5 Checking the Fingerprint of a Certificate on Your Computer .................................................104
Chapter 9
Log Settings ......................................................................................................................................105
9.1 Overview .........................................................................................................................................105
9.2 What You Can Do in this Chapter ...................................................................................................105
NWA1000 Series User’s Guide
Table of Contents
9.3 What You Need To Know ................................................................................................................106
9.4 Log Settings Screen ........................................................................................................................106
Chapter 10
Maintenance ......................................................................................................................................109
10.1 Overview .......................................................................................................................................109
10.2 What You Can Do in this Chapter .................................................................................................109
10.3 What You Need To Know .............................................................................................................. 110
10.4 General Screen ............................................................................................................................. 110
10.5 Password Screen .......................................................................................................................... 111
10.6 Time Screen .................................................................................................................................. 112
10.7 Firmware Upgrade Screen ............................................................................................................ 113
10.8 Configuration File Screen .............................................................................................................. 114
10.8.1 Backup Configuration .......................................................................................................... 115
10.8.2 Restore Configuration .......................................................................................................... 115
10.8.3 Back to Factory Defaults ..................................................................................................... 116
10.9 Restart Screen .............................................................................................................................. 116
Chapter 11
Troubleshooting................................................................................................................................ 117
11.1 Power, Hardware Connections, and LEDs .................................................................................... 117
11.2 NWA Access and Login ................................................................................................................. 118
11.3 Internet Access .............................................................................................................................. 119
11.4 Wireless LAN .................................................................................................................................120
Appendix A Setting Up Your Computer’s IP Address ......................................................................122
Appendix B Pop-up Windows, JavaScript and Java Permissions ...................................................150
Appendix C IP Addresses and Subnetting.......................................................................................161
Appendix D IPv6 ..............................................................................................................................169
Appendix E Wireless LANs..............................................................................................................178
Appendix F Customer Support ........................................................................................................192
Appendix G Legal Information .........................................................................................................198
Index ..................................................................................................................................................204
NWA1000 Series User’s Guide
P ART I
User’s Guide
C HAPT ER
Introducing the NWA
This chapter introduces the main applications and features of the NWA. It also discusses the ways
you can manage your NWA.
1.1 Introducing the NWA
This User’s Guide covers the following models: NWA1100-NH, NWA1121-NI, NWA1123-NI and
NWA1123-AC. Your NWA is an IPv6 wireless AP (Access Point) that can function in several wireless
modes. It extends the range of your existing wired network without additional wiring, providing
easy network access to mobile users.
Table 1 NWA Series Comparison Table
FEATURES
NWA1100-NH
NWA1121-NI
NWA1123-NI
NWA1123-AC
IEEE 802.11b
IEEE 802.11g
IEEE 802.11n
IEEE 802.11b
IEEE 802.11g
IEEE 802.11n
IEEE
IEEE
IEEE
IEEE
IEEE 802.11a
IEEE 802.11ac
IEEE 802.11b
IEEE 802.11g
IEEE 802.11n
2.4 GHz
2.4 GHz
2.4 GHz
5 GHz
2.4 GHz
5 GHz
Available Security Modes
None
WEP
WPA2
WPA2-MIX
WPA2-PSK
WPA2-PSK-MIX
None
WEP
WPA2
WPA2-MIX
WPA2-PSK
WPA2-PSK-MIX
None
WEP
WPA2
WPA2-MIX
WPA2-PSK
WPA2-PSK-MIX
None
WEP
WPA2
WPA2-MIX
WPA2-PSK
WPA2-PSK-MIX
Number of SSID Profiles
32
32
Yes
Yes
Yes
Yes
Supported Wireless Standards
Supported Frequency Bands
Layer-2 Isolation
802.11a
802.11b
802.11g
802.11n
The NWA controls network access with MAC address filtering and RADIUS server authentication. It
also provides a high level of network traffic security, supporting IEEE 802.1x, Wi-Fi Protected
Access, WPA2 and WEP data encryption. Its Quality of Service (QoS) features allow you to prioritize
time-sensitive or highly important applications such as VoIP.
Your NWA is easy to install, configure and use. The embedded Web-based configurator enables
simple, straightforward management and maintenance.
See the Quick Start Guide for instructions on how to make hardware connections.
1.1.1 Dual-Band
The NWA1123-NI or NWA1123-AC is a dual-band AP and able to function both 2.4G and 5G
networks at the same time. You could use the 2.4 GHz band for regular Internet surfing and
NWA1000 Series User’s Guide
Chapter 1 Introducing the NWA
downloading while using the 5 GHz band for time sensitive traffic like high-definition video, music,
and gaming.
Figure 1 Dual-Band Application
1.2 Wireless Modes
The NWA can be configured to use the following WLAN operating modes:
OPERATING MODE
NUMBER OF
SUPPORTED SSID
REPEATER FUNCTION
AP FUNCTION
MBSSID
No
Yes
Client
No
No
Root AP
Yes
Yes
Repeater
Yes
Yes
Applications for each operating mode are shown below.
1.2.1 MBSSID
A Basic Service Set (BSS) is the set of devices forming a single wireless network (usually an access
point and one or more wireless clients). The Service Set IDentifier (SSID) is the name of a BSS. In
Multiple BSS (MBSSID) mode, the NWA provides multiple virtual APs, each forming its own BSS and
using its own individual SSID profile.
You can configure multiple SSID profiles, and have all of them active at any one time.
You can assign different wireless and security settings to each SSID profile. This allows you to
compartmentalize groups of users, set varying access privileges, and prioritize network traffic to
and from certain BSSs.
10
NWA1000 Series User’s Guide
Chapter 1 Introducing the NWA
To the wireless clients in the network, each SSID appears to be a different access point. As in any
wireless network, clients can associate only with the SSIDs for which they have the correct security
settings.
For example, you might want to set up a wireless network in your office where Internet telephony
(VoIP) users have priority. You also want a regular wireless network for standard users, as well as a
‘guest’ wireless network for visitors. In the following figure, VoIP_SSID users have QoS priority,
SSID01 is the wireless network for standard users, and Guest_SSID is the wireless network for
guest users. In this example, the guest user is forbidden access to the wired Land Area Network
(LAN) behind the AP and can access only the Internet.
Figure 2 Multiple BSSs
1.2.2 Wireless Client
The NWA can be used as a wireless client to communicate with an existing network.
Note: The NWA1123-NI or NWA1123-AC is a dual-band AP which contains two different
types of wireless radios to transmit at 2.4 GHz and 5 GHz bands separately and
simultaneously. If one of the NWA1123-NI wireless radio is set to work in client
mode, the other radio will be disabled automatically.
NWA1000 Series User’s Guide
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Chapter 1 Introducing the NWA
In the figure below, the printer can receive requests from the wired computer clients A and B via
the NWA in Client mode (Z) using only the 2.4 GHz band.
Figure 3 Wireless Client Application
12
NWA1000 Series User’s Guide
Chapter 1 Introducing the NWA
1.2.3 Root AP
In Root AP mode, the NWA (Z) can act as the root AP in a wireless network and also allow repeaters
(X and Y) to extend the range of its wireless network at the same time. In the figure below, both
clients A, B and C can access the wired network through the root AP.
Figure 4 Root AP Application
On the NWA in Root AP mode, you can have multiple SSIDs active for regular wireless connections
and one SSID for the connection with a repeater (repeater SSID). Wireless clients can use either
SSID to associate with the NWA in Root AP mode. A repeater must use the repeater SSID to
connect to the NWA in Root AP mode.
When the NWA is in Root AP mode, repeater security between the NWA and other repeater is
independent of the security between the wireless clients and the AP or repeater. If you do not
enable repeater security, traffic between APs is not encrypted. When repeater security is enabled,
both APs and repeaters must use the same pre-shared key. See Section 6.6 on page 72 for more
details.
Unless specified, the term “security settings” refers to the traffic between the wireless clients and
the AP. At the time of writing, repeater security is compatible with the NWA only.
1.2.4 Repeater
The NWA can act as a wireless network repeater to extend a root AP’s wireless network range, and
also establish wireless connections with wireless clients.
Using Repeater mode, your NWA can extend the range of the WLAN. In the figure below, the NWA
in Repeater mode (Z) has a wireless connection to the NWA in Root AP mode (X) which is
connected to a wired network and also has a wireless connection to another NWA in Repeater mode
(Y) at the same time. Z and Y act as repeaters that forward traffic between associated wireless
NWA1000 Series User’s Guide
13
Chapter 1 Introducing the NWA
clients and the wired LAN. Clients A and B access the AP and the wired network behind the AP
through repeaters Z and Y.
Figure 5 Repeater Application
When the NWA is in Repeater mode, repeater security between the NWA and other repeater is
independent of the security between the wireless clients and the AP or repeater. If you do not
enable repeater security, traffic between APs is not encrypted. When repeater security is enabled,
both APs and repeaters must use the same pre-shared key. See Section 6.6 on page 72 for more
details.
Once the security settings of peer sides match one another, the connection between devices is
made.
At the time of writing, repeater security is compatible with the NWA only.
1.3 Ways to Manage the NWA
Use any of the following methods to manage the NWA.
• Web Configurator. This is recommended for everyday management of the NWA using a
(supported) web browser.
• Telnet to login to the NWA using a virtual terminal connection.
• FTP (File Transfer Protocol) for firmware upgrades and configuration backup and restore.
• SNMP (Simple Network Management Protocol). The device can be monitored by an SNMP
manager.
14
NWA1000 Series User’s Guide
Chapter 1 Introducing the NWA
1.4 Configuring Your NWA’s Security Features
Your NWA comes with a variety of security features. This section summarizes these features and
provides links to sections in the User’s Guide to configure security settings on your NWA. Follow the
suggestions below to improve security on your NWA and network.
1.4.1 Control Access to Your Device
Ensure only people with permission can access your NWA.
• Control physical access by locating devices in secure areas, such as locked rooms. Most NWAs
have a reset button. If an unauthorized person has access to the reset button, they can then
reset the device’s password to its default password, log in and reconfigure its settings.
• Change any default passwords on the NWA, such as the password used for accessing the NWA’s
web configurator (if it has a web configurator). Use a password with a combination of letters and
numbers and change your password regularly. Write down the password and put it in a safe
place.
• See Section 10.5 on page 111 for instructions on changing your password.
• Configure remote management to control who can manage your NWA. See Chapter 8 on page 92
for more information. If you enable remote management, ensure you have enabled remote
management only on the IP addresses, services or interfaces you intended and that other remote
management settings are disabled.
1.4.2 Wireless Security
Wireless devices are especially vulnerable to attack. Take the following measures to improve
wireless security.
• Enable wireless security on your NWA. Choose the most secure encryption method that all
devices on your network support. See Section 6.6 on page 72 for directions on configuring
encryption. If you have a RADIUS server, enable IEEE 802.1x or WPA2 user identification on your
network so users must log in. This method is more common in business environments.
• Hide your wireless network name (SSID). The SSID can be regularly broadcast and unauthorized
users may use this information to access your network. See Section 6.5 on page 70 for directions
on using the web configurator to hide the SSID.
• Enable the MAC filter to allow only trusted users to access your wireless network or deny
unwanted users access based on their MAC address. See Section 6.9 on page 82 for directions on
configuring the MAC filter.
1.5 Good Habits for Managing the NWA
Do the following things regularly to make the NWA more secure and to manage it 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.
NWA1000 Series User’s Guide
15
Chapter 1 Introducing the NWA
• Back up the configuration (and make sure you know how to restore it). Restoring an earlier
working configuration may be useful if the device becomes unstable or even crashes. If you
forget your password, you will have to reset the NWA to its factory default settings. If you backed
up an earlier configuration file, you would not have to totally re-configure the NWA. You could
simply restore your last configuration.
1.6 Hardware Connections
See your Quick Start Guide for information on making hardware connections.
1.7 LED
Figure 6 LED
Table 2 LED
LED
COLOR
STATUS
DESCRIPTION
PWR/SYS
Amber/Red
On
There is system error and the NWA cannot boot up, or the NWA doesn’t
have an Ethernet connection with the LAN.
Blinking
The NWA is starting up.
Off
The NWA is receiving power and ready for use.
On
The NWA is receiving power.
Blinking
The NWA is starting up.
Off
The NWA is not receiving power.
Green
16
NWA1000 Series User’s Guide
Chapter 1 Introducing the NWA
Table 2 LED (continued)
LED
COLOR
WLAN
Green
UPLINK
Green
NWA1000 Series User’s Guide
STATUS
DESCRIPTION
On
The WLAN is active.
Blinking
The WLAN is transmitting or receiving data.
Off
The WLAN is not active.
On
The port is connected.
Blinking
The NWA is sending/receiving data through the port.
Off
The port is not connected.
17
C HAPT ER
Introducing the Web Configurator
This chapter describes how to access the NWA’s web configurator and provides an overview of its
screens.
2.1 Overview
The NWA Web Configurator allows easy management using an Internet browser.
In order to use the Web Configurator, you must:
• Use Internet Explorer 7.0 and later versions, Mozilla Firefox 9.0 and later versions, Safari 4.0 and
later versions, or Google Chrome 10.0 and later versions.
• Allow pop-up windows.
• Enable JavaScript (enabled by default).
• Enable Java permissions (enabled by default).
• Enable cookies.
The recommended screen resolution is 1024 x 768 pixels and higher.
2.2 Accessing the Web Configurator
Make sure your hardware is properly connected and prepare your computer or computer network to
connect to the NWA (refer to the Quick Start Guide).
Launch your web browser.
NWA1000 Series User’s Guide
18
Chapter 2 Introducing the Web Configurator
Type “192.168.1.2” as the URL (default). The login screen appears.
Figure 7 The Login Screen
Type “admin” as the (default) username and “1234” as the (default) password. Click Login.
You should see a screen asking you to change your password (highly recommended) as shown
next. Type a new password (and retype it to confirm) then click Apply. Alternatively, click Ignore.
Note: If you do not change the password, the following screen appears every time you
login.
Figure 8 Change Password Screen
You should now see the Dashboard screen. See Chapter 2 on page 18 for details about the
Dashboard screen.
NWA1000 Series User’s Guide
19
Chapter 2 Introducing the Web Configurator
2.3 Resetting the NWA
If you forget your password or cannot access the web configurator, you will need to use the RESET
button at the rear panel of the NWA. This replaces the current configuration file with the factorydefault configuration file. This means that you will lose all the settings you previously configured.
The password will be reset to “1234”.
Figure 9 The RESET Button
2.3.1 Methods of Restoring Factory-Defaults
You can erase the current configuration and restore factory defaults in two ways:
Use the RESET button to upload the default configuration file. Hold this button in for about 3
seconds (the light will begin to blink). Use this method for cases when the password or IP address
of the NWA is not known.
Use the web configurator to restore defaults (refer to Section 10.8 on page 114).
20
NWA1000 Series User’s Guide
Chapter 2 Introducing the Web Configurator
2.4 Navigating the Web Configurator
The following summarizes how to navigate the web configurator from the Dashboard screen. This
guide uses the NWA1100-NH screens as an example. The screens may vary slightly for different
models.
Figure 10 Status Screen of the Web Configurator
As illustrated above, the Web Configurator screen is divided into these parts:
• A - title bar
• B - navigation panel
• C - main window
2.4.1 Title Bar
Click Logout at any time to exit the Web Configurator.
Click ZAbout to open the about window, which provides information of the boot module and driver
versions.
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Chapter 2 Introducing the Web Configurator
2.4.2 Navigation Panel
Use the menu items on the navigation panel to open screens to configure NWA features. The
following tables describe each menu item.
Table 3 Navigation Panel Summary
LINK
TAB
Dashboard
FUNCTION
This screen shows the NWA’s general device and network status
information. Use this screen to access the statistics and client list.
Monitor
Logs
View Log
Use this screen to view the logs for the categories that you selected.
Statistics
Use this screen to view port status, packet specific statistics, the
"system up time" and so on.
Association List
Use this screen to view the wireless stations that are currently
associated to the NWA.
Channel Usage
Use this screen to know whether a channel is used by another
wireless network or not.
Configuration
Network
Wireless LAN
Wireless
Settings
Use this screen to configure the wireless LAN settings and NWA’s
operation mode.
Wireless
Settings - 2.4G
Wireless
Settings - 5G
LAN
System
Log Settings
SSID
Use this screen to configure up to eight SSID profiles for your NWA.
Security
Use this screen to configure wireless security profiles on the NWA.
RADIUS
Use this screen to configure up to four RADIUS profiles.
Layer-2 Isolation
Use this screen to configure the MAC addresses of the devices that
you want to allow the associated wireless clients to have access to
when layer-2 isolation is enabled
MAC Filter
Use this screen to configure MAC filtering profiles.
IP
Use this screen to configure the NWA’s LAN IP address.
WWW
Use this screen to configure through which interface(s) and from
which IP address(es) users can use HTTP to manage the NWA.
Certificates
Use this screen to import or remove a certificate from the NWA.
Telnet
Use this screen to configure through which interface(s) and from
which IP address(es) users can use Telnet to manage the NWA.
SNMP
Use this screen to configure the NWA for SNMP management.
FTP
Use this screen to configure through which interface(s) and from
which IP address(es) users can use FTP to access the NWA.
Use this screen to change your log settings.
Maintenance
22
General
Use this screen to configure your device’s name.
Password
Use this screen to configure your device’s password.
Time
Use this screen to change your NWA’s time and date.
Firmware Upgrade
Use this screen to upload firmware to your device.
NWA1000 Series User’s Guide
Chapter 2 Introducing the Web Configurator
Table 3 Navigation Panel Summary
LINK
TAB
FUNCTION
Configuration File
Use this screen to backup and restore your device’s configuration
(settings) or reset the factory default settings.
Restart
Use this screen to reboot the NWA without turning the power off.
2.4.3 Main Window
The main window displays information and configuration fields. It is discussed in the rest of this
document.
NWA1000 Series User’s Guide
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C HAPT ER
Dashboard
The Dashboard screens display when you log into the NWA, or click Dashboard in the navigation
menu.
Use the Dashboard screen to look at the current status of the device, system resources, and
interfaces. The Dashboard screens also provide detailed information about system statistics,
associated wireless clients, and logs.
3.1 The Dashboard Screen
Use this screen to get a quick view of system, Ethernet, WLAN and other information regarding
your NWA.
NWA1000 Series User’s Guide
24
Chapter 3 Dashboard
Click Dashboard. The following screen displays.
Figure 11 The Dashboard Screen (NWA1100-NH)
Figure 12 The Dashboard Screen (NWA1123-NI or NWA1123-AC)
NWA1000 Series User’s Guide
25
Chapter 3 Dashboard
The following table describes the labels in this screen.
Table 4 The Dashboard Screen
LABEL
DESCRIPTION
Refresh Interval
Select how often you want the NWA to update this screen.
Refresh Now
Click this to update this screen immediately.
System Information
System Name
This field displays the NWA system name. It is used for identification. You can
change this in the Maintenance > General screen’s System Name field.
WLAN Operating
Mode
This field displays the current operating mode of the wireless module (Root AP,
Repeater, Client, or MBSSID). You can change the operating mode in the
Configuration > Wireless LAN > Wireless Settings screen.
2.4G
This field displays the current operating mode of the 2.4G wireless module (Root
AP, Repeater, Client, or MBSSID). You can change the operating mode in the
Configuration > Wireless LAN > Wireless Settings - 2.4G screen.
5G
This field displays the current operating mode of the 5G wireless module (Root AP,
Repeater, Client, or MBSSID). You can change the operating mode in the
Configuration > Wireless LAN > Wireless Settings - 5G screen.
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 Maintenance > Firmware Upgrade.
Serial Number
This field displays the serial number of the NWA.
Ethernet Information
LAN MAC Address
This displays the MAC (Media Access Control) address of the NWA on the LAN.
Every network device has a unique MAC address which identifies it across the
network.
IPv4 Address
This field displays the current IPv4 address of the NWA on the network.
Subnet Mask
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.
Gateway IP Address
This is the IP address of the gateway. The gateway is a router or switch on the
same network segment as the device's LAN port. The gateway helps forward
packets to their destinations.
IPv6 Address
This field displays the current IPv6 address(es) of the NWA on the network.
Link Local
This is the IPv6 link-local address that the NWA generates automatically.
Global
This is the NWA’s IPv6 global address that you specify manually in the
Configuration > LAN screen.
WLAN Information
SSID
This field displays the SSID (Service Set Identifier). This is available only when the
WLAN operation mode is Client.
Channel
The channel or frequency used by the NWA to send and receive information (in the
2.4G or 5G wireless network).
Status
This shows the current status of the wireless LAN. This is available only when the
WLAN operation mode is Client.
Security Mode
This displays the security mode the NWA is using. This is available only when the
WLAN operation mode is Client.
Summary
26
Statistics
Click this link to view port status and packet specific statistics. See Section 5.4 on
page 47.
Association List
Click this to see a list of wireless clients currently associated to each of the NWA’s
wireless modules. See Section 5.5 on page 48.
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Table 4 The Dashboard Screen (continued)
LABEL
View Log
DESCRIPTION
Click this to see a list of logs produced by the NWA. See Section 5.3 on page 46.
System Status
System Up Time
This field displays the elapsed time since the NWA was turned on.
Current Date/Time
This field displays the date and time configured on the NWA. You can change this in
the Maintenance > Time screen.
System Resource
CPU Usage
This field displays what percentage of the NWA’s processing ability is currently
being used. The higher the CPU usage, the more likely the NWA is to slow down.
Memory Usage
This field displays what percentage of the NWA’s volatile memory is currently in
use. The higher the memory usage, the more likely the NWA is to slow down. Some
memory is required just to start the NWA and to run the web configurator.
Interface Status
Interface
This column displays each interface of the NWA.
Status
This field indicates whether or not the NWA is using the interface.
For each interface, this field displays Up when the NWA is using the interface and
Down when the NWA is not using the interface.
Channel
Rate
This shows the channel number which the NWA is currently using over the wireless
LAN.
For the LAN port this displays the port speed and duplex setting.
For the WLAN interface, it displays the downstream and upstream transmission
rate or N/A if the interface is not in use.
SSID Status
This section is not available when the WLAN operation mode is Client.
Interface
This column displays each of the NWA’s wireless interfaces.
SSID
This field displays the SSID(s) currently used by each wireless module.
BSSID
This field displays the MAC address of the wireless module.
Security
This field displays the type of wireless security used by each SSID.
VLAN
This field displays the VLAN ID of each SSID in use, or Disabled if the SSID does
not use VLAN.
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Tutorial
This chapter first provides an overview of how to configure the wireless LAN on your NWA, and then
gives step-by-step guidelines showing how to configure your NWA for some example scenarios.
4.1 How to Configure the Wireless LAN
This section illustrates how to choose which wireless operating mode to use on the NWA and how to
set up the wireless LAN in each wireless mode. See Section 4.1.2 on page 28 for links to more
information on each step.
4.1.1 Choosing the Wireless Mode
• Use MBSSID (Multiple Basic Service Set Identifier) operating mode if you want to use the NWA
as an access point with some groups of users having different security or QoS settings from other
groups of users. See Section 1.2.1 on page 10 for details.
• Use Client operating mode if you want to use the NWA to access a wireless network. See Section
1.2.2 on page 11 for details.
• Use Root AP operating mode if you want to allow wireless clients to access your wired network
through the NWA and also have repeaters communicate with the NWA to expand wireless
coverage. See Section 1.2.3 on page 13 for details.
• Use Repeater operating mode if you want to use the NWA to communicate with the root AP or
other repeaters. See Section 1.2.4 on page 13 for details.
4.1.2 Further Reading
Use these links to find more information on the steps:
• Choosing 802.11 Mode: see Section 6.4 on page 56.
• Choosing a wireless Channel ID: see Section 6.4 on page 56.
• Choosing a Security mode: see Section 6.6 on page 72.
• Configuring an external RADIUS server: see Section 6.7 on page 78.
• Configuring MAC Filtering: see Section 6.9 on page 82.
4.2 How to Configure Multiple Wireless Networks
In this example, you have been using your NWA as an access point for your office network. Now
your network is expanding and you want to make use of the MBSSID feature (see Section 6.4.4 on
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page 67) to provide multiple wireless networks. Each wireless network will cater to a different type
of user.
You want to make three wireless networks: one standard office wireless network with all the same
settings you already have, another wireless network with high priority QoS settings for Voice over
IP (VoIP) users, and a guest network that allows visitors to access only the Internet and the
network printer.
To do this, you will take the following steps:
Edit the SSID profiles.
Change the operating mode from Root AP to MBSSID and reactivate the standard network.
Configure different security modes for the networks.
Configure a wireless network for standard office use.
Configure a wireless network for VoIP users.
Configure a wireless network for guests to your office.
The following figure shows the multiple networks you want to set up. Your NWA is marked Z, the
main network router is marked A, and your network printer is marked B.
The standard network (SSID01) has access to all resources. The VoIP network (VoIP_SSID) has
access to all resources and a high QoS priority. The guest network (Guest_SSID) has access to the
Internet and the network printer only, and a low QoS priority.
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To configure these settings, you need to know the Media Access Control (MAC) addresses of the
devices you want to allow users of the guest network to access. The following table shows the
addresses used in this example.
Table 5 Tutorial: Example Information
Network router (A) MAC address
00:AA:00:AA:00:AA
Network printer (B) MAC address
AA:00:AA:00:AA:00
4.2.1 Configure the SSID Profiles
30
Log in to the NWA (see Section 2.2 on page 18). Click Wireless LAN > SSID. The SSID screen
appears.
Click the Edit icon next to the Profile1.
Rename the Profile Name and SSID as SSID01. Click Apply.
Repeat Step 2 and 3 to change Profile2 and Profile3 to VoIP_SSID and Guest_SSID.
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4.2.1.1 MBSSID
Go to Wireless LAN > Wireless Settings. Select MBSSID from the Operation Mode drop-down
list box.
SSID01 is the standard network, so select SSID01 as the first profile. It is always active.
Select VoIP_SSID as the second profile, and Guest_SSID as the third profile. Select the
corresponding Active check-boxes.
Click Apply to save your settings. Now the three SSIDs are activated.
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4.2.2 Configure the Standard Network
Click Wireless LAN > SSID. Click the Edit icon next to SSID01.
Select SecProfile1 as SSID01’s security profile. Select the Hidden SSID checkbox as you want
only authorized company employees to use this network, so there is no need to broadcast the SSID
to wireless clients scanning the area.
Also, the clients on SSID01 might need to access other clients on the same wireless network. Do
not select the Intra-BSS Traffic blocking check-box.
Click Apply.
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Next, click Wireless LAN > Security. Click the Edit icon next to SecProfile1.
Since SSID01 is the standard network that has access to all resources, assign a more secure
security mode. Select WPA2-PSK-MIX as the Security Mode, and enter the Pre-Shared Key. In
this example, use ThisisSSID01PreSharedKey. Click Apply.
You have finished configuring the standard network, SSID01.
4.2.3 Configure the VoIP Network
Go to Wireless LAN > SSID. Click the Edit icon next to VoIP_SSID.
Select SecProfile2 as the Security Profile for the VoIP network. Select the Hidden SSID checkbox.
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34
Select WMM_VOICE in the QoS field to give VoIP the highest priority in the wireless network. Click
Apply.
Next, click Wireless LAN > Security. Click the Edit icon next to SecProfile2.
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Select WPA2-PSK as the Security Mode, and enter the Pre-Shared Key. In this example, use
ThisisVoIPPreSharedKey. Click Apply.
Your VoIP wireless network is now ready to use. Any traffic using the VoIP_SSID profile will be
given the highest priority across the wireless network.
4.2.4 Configure the Guest Network
When you are setting up the wireless network for guests to your office, your primary concern is to
keep your network secure while allowing access to certain resources (such as a network printer, or
the Internet). For this reason, the pre-configured Guest_SSID profile has intra-BSS traffic blocking
enabled by default. “Intra-BSS traffic blocking” means that the client cannot access other clients on
the same wireless network.
Click Wireless LAN > SSID. Click the Edit icon next to Guest_SSID.
Select SecProfile3 in the Security field. Do not select the Hidden SSID check-box so the guests
can easily find the wireless network.
Select WMM_BESTEFFORT in the QoS field to give the guest a lower QoS priority.
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36
Select the check-box of Intra-BSS Traffic blocking Enabled. Click Apply.
Next, click Wireless LAN > Security. Click the Edit icon next to SecProfile3.
Select WPA2-PSK in the Security Mode field. WPA2-PSK provides strong security that is
supported by most wireless clients. Even though your Guest_SSID clients do not have access to
sensitive information on the network, you should not leave the network without security. An
attacker could still cause damage to the network or intercept unsecured communications or use
your Internet access for illegal activities.
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Chapter 4 Tutorial
Enter the PSK you want to use in your network in the Pre Shared Key field. In this example, the
PSK is ThisismyGuestWPA2pre-sharedkey. Click Apply.
Your guest wireless network is now ready to use.
4.2.5 Testing the Wireless Networks
To make sure that the three networks are correctly configured, do the following.
• On a computer with a wireless client, scan for access points. You should see the Guest_SSID
network, but not the SSID01 and VoIP_SSID networks. If you can see the SSID01 and
VoIP_SSID networks, go to its SSID Edit screen and make sure to select the Hidden SSID
check-box and click Apply.
• Try to access each network using the correct security settings, and then using incorrect security
settings, such as the WPA2-PSK for another active network. If the behavior is different from
expected (for example, if you can access the SSID01 or VoIP_SSID wireless network using the
security settings for the Guest_SSID wireless network) check that the SSID profile is set to use
the correct security profile, and that the settings of the security profile are correct.
4.3 NWA Setup in AP and Wireless Client Modes
This example shows you how to restrict wireless access to your NWA.
4.3.1 Scenario
In the figure below, there are two NWAs (A and B) in the network. A is in MBSSID or root AP mode
while station B is in wireless client mode. Station B is connected to a File Transfer Protocol (FTP)
server. You want only specified wireless clients to be able to access station B. You also want to allow
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wireless traffic between B and wireless clients connected to A (W, Y and Z). Other wireless devices
(X) must not be able to connect to the FTP server.
Figure 13 FTP Server Connected to a Wireless Client
4.3.2 Configuring the NWA in MBSSID or Root AP Mode
Before setting up the NWA as a wireless client (B), you need to make sure there is an access point
to connect to. Use the Ethernet port on NWA (A) to configure it via a wired connection.
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Log into the Web Configurator on NWA (A) and go to the Wireless LAN > Wireless Settings
screen.
Set the Operation Mode to Root AP.
Select the Wireless Mode. In this example, select 802.11b/g/n.
Select Profile1 as the SSID Profile.
Choose the Channel you want NWA (A) to use.
Click Apply.
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Go to Wireless LAN > SSID. Click the Edit icon next to Profile1.
Change the SSID to AP-A.
Select SecProfile1 in the Security field.
Select the check-box for Intra-BSS Traffic blocking Enabled so the client cannot access other
clients on the same wireless network.
10 Click Apply.
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11 Go to Wireless LAN > Security. Click the Edit icon next to SecProfile1.
12 Configure WPA2-PSK as the Security Mode and enter ThisisMyPreSharedKey in the PreShared Key field.
13 Click Apply to finish configuration for NWA (A).
4.3.3 Configuring the NWA in Wireless Client Mode
The NWA (B) should have a wired connection before it can be set to wireless client operating mode.
Connect your NWA to the FTP server. Login to NWA (B)’s Web Configurator and go to the Wireless
LAN > Wireless Settings screen. Follow these steps to configure station B.
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42
Select Client as Operation Mode. Click Apply. Site Survey button appears next to the drop-down
list.
Click on the Site Survey button. A window should pop up which contains a list of all available
wireless devices within your NWA’s range.
Find and select NWA (A)’s SSID: AP-A.
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Go to Wireless LAN > Security to configure the NWA to use the same security mode and PreShared Key as NWA (A): WPA2-PSK/ThisisMyPreSharedKey. Click Apply.
Figure 14
4.3.4 MAC Filter Setup
One way to ensure that only specified wireless clients can access the FTP server is by enabling MAC
filtering on NWA (B) (See Section 6.9 on page 82 for more information on MAC Filter).
Go to Wireless LAN > MAC Filter. Click the Edit icon next to MacProfile1.
Select Allow in the Access Control Mode field. Enter the MAC addresses of the wireless clients
(W, Y and Z) you want to associate with the NWA. Click Apply.
Now, only the authorized wireless clients (W, Y and Z) can access the FTP server.
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4.3.5 Testing the Connection and Troubleshooting
This section discusses how you can check if you have correctly configured your network setup as
described in this tutorial.
• Try accessing the FTP server from wireless clients W, Y or Z. Test if you can send or retrieve a
file. If you cannot establish a connection with the FTP server, do the following steps.
Make sure W, Y and Z use the same wireless security settings as A and can access A.
Make sure B uses the same wireless and wireless security settings as A and can access A.
Make sure intra-BSS traffic is enabled on A.
• Try accessing the FTP server from X. If you are able to access the FTP server, do the following.
44
Make sure MAC filtering is enabled.
Make sure X’s MAC address is not entered in the list of allowed devices.
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P ART II
Technical Reference
The appendices provide general information. Some details may not apply to your NWA.
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C HAPT ER
Monitor
5.1 Overview
This chapter discusses read-only information related to the device state of the NWA.
Note: To access the Monitor screens, you can also click the links in the Summary table of
the Dashboard screen to view the wireless packets sent/received as well as the
status of clients connected to the NWA.
5.2 What You Can Do
• Use the Logs screen to see the logs for the categories that you selected in the Configuration >
Log Settings screen (see Section 5.3 on page 46). You can view logs in this page. Once the log
entries are all used, the log will wrap around and the old logs will be deleted.
• use the Statistics screen to view 802.11 mode, channel number, wireless packet specific
statistics and so on (see Section 5.4 on page 47).
• Use the Association List screen to view the wireless devices that are currently associated to the
NWA (see Section 5.5 on page 48).
• Use the Channel Usage screen to view whether a channel is used by another wireless network
or not. If a channel is being used, you should select a channel removed from it by five channels
to completely avoid overlap (see Section 5.6 on page 49).
5.3 View Logs
Use the Logs screen to see the logged messages for the NWA.
Log entries in red indicate system error logs. The log wraps around and deletes the old entries after
it fills.
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Chapter 5 Monitor
Click Monitor > Logs.
Figure 15 Logs
The following table describes the labels in this screen.
Table 6 Logs
LABEL
DESCRIPTION
Display
Select a category of logs to view. Select All Log to view logs from all of the log
categories that you selected in the Configuration > Log Settings screen.
E-Mail Log Now
Click E-Mail Log Now to send the log screen to the e-mail address specified in the Log
Settings page (make sure that you have first filled in the E-mail Log Settings fields in
Configuration > Log Settings).
Refresh
Click Refresh to renew the log screen.
Clear Log
Click Clear Log to delete all the logs.
This field is a sequential value and is not associated with a specific entry.
Time
This field displays the time the log was recorded.
Message
This field states the reason for the log.
Source
This field lists the source IP address and the port number of the incoming packet.
5.4 Statistics
Use this screen to view read-only information, including 802.11 Mode, Channel ID, Retry Count and
FCS Error Count. Also provided is the "poll interval". The Poll Interval field is configurable and is
used for refreshing the screen.
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Chapter 5 Monitor
Click Monitor > Statistics. The following screen pops up.
Figure 16 Statistics
The following table describes the labels in this screen.
Table 7 Statistics
LABEL
DESCRIPTION
Description
This is the wireless interface on the NWA.
802.11 Mode
This field shows which 802.11 mode the NWA is using.
Channel ID
This shows the channel number which the NWA is currently using over the wireless
LAN.
RX Pkts
This is the number of received packets on this port.
TX Pkts
This is the number of transmitted packets on this port.
Retry Count
This is the total number of retries for transmitted packets (TX).
FCS Error Count
This is the total number of checksum error of received packets (RX).
Poll Interval
Enter the time interval for refreshing statistics.
Set Interval
Click this button to apply the new poll interval you entered above.
Stop
Click this button to stop refreshing statistics.
5.5 Association List
View the wireless devices that are currently associated with the NWA in the Association List
screen. Association means that a wireless client (for example, your network or computer with a
wireless network card) has connected successfully to the AP (or wireless router) using the same
SSID, channel and security settings.
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Click Monitor > Association List to display the screen as shown next.
Figure 17 Association List
The following table describes the labels in this screen.
Table 8 Association List
LABEL
DESCRIPTION
This is the index number of an associated wireless device.
MAC Address
This field displays the MAC address of an associated wireless device.
SSID
This field displays the SSID to which the wireless device is associated.
Association Time
This field displays the time a wireless device first associated with the NWA’s wireless
network.
Signal Strength
This field displays the RSSI (Received Signal Strength Indicator) of the wireless
connection.
Refresh
Click Refresh to reload the list.
5.6 Channel Usage
Use this screen to know whether a channel is used by another wireless network or not. If a channel
is being used, you should select a channel removed from it by five channels to completely avoid
overlap.
Click Monitor > Channel Usage to display the screen shown next.
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Wait a moment while the NWA compiles the information.
Figure 18 Channel Usage
The following table describes the labels in this screen.
Table 9 Channel Usage
50
LABEL
DESCRIPTION
SSID
This is the Service Set IDentification (SSID) name of the AP in an Infrastructure
wireless network or wireless station in an Ad-Hoc wireless network. For our purposes,
we define an Infrastructure network as a wireless network that uses an AP and an AdHoc network (also known as Independent Basic Service Set (IBSS)) as one that
doesn’t. See the chapter on wireless configuration for more information on basic
service sets (BSS) and extended service sets (ESS).
Channel
This is the index number of the channel currently used by the associated AP in an
Infrastructure wireless network or wireless station in an Ad-Hoc wireless network.
MAC Address
This field displays the MAC address of the AP in an Infrastructure wireless network. It
is randomly generated (so ignore it) in an Ad-Hoc wireless network.
Wireless Mode
This is the IEEE 802.1x standard used by the wireless network.
Signal Strength
This field displays the strength of the AP’s signal. If you must choose a channel that is
currently in use, choose one with low signal strength for minimum interference.
Security
This is the wireless security method used by the wireless network to protect wireless
communication between wireless stations, access points and the wired network.
Refresh
Click Refresh to reload the screen.
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Wireless LAN
6.1 Overview
This chapter discusses the steps to configure the Wireless Settings screen on the NWA. It also
introduces the wireless LAN (WLAN) and some basic scenarios.
Figure 19 Wireless Mode
In the figure above, the NWA allows access to another bridge device (A) and a notebook computer
(B) upon verifying their settings and credentials. It denies access to other devices (C and D) with
configurations that do not match those specified in your NWA.
6.2 What You Can Do in this Chapter
• Use the Wireless Settings screen to configure the NWA’s operation mode (see Section 6.4 on
page 56).
• Use the SSID screen to configure up to eight SSID profiles for your NWA (see Section 6.5 on
page 70).
• Use the Security screen to choose the wireless security mode for your NWA (see Section 6.6 on
page 72).
• Use the RADIUS screen if you want to authenticate wireless users using a RADIUS Server and/or
accounting server (see Section 6.7 on page 78).
• Use the Layer-2 Isolation screen to configure the MAC addresses of the devices that you want
to allow the associated wireless clients to have access to when layer-2 isolation is enabled. (see
Section 6.8 on page 80).
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Chapter 6 Wireless LAN
• Use the MAC Filter screen to specify which wireless station is allowed or denied access to the
NWA (see Section 6.9 on page 82).
6.3 What You Need To Know
BSS
A Basic Service Set (BSS) exists when all communications between wireless clients or between a
wireless client and a wired network client go through one access point (AP). Intra-BSS traffic is
traffic between wireless clients in the BSS.
ESS
An Extended Service Set (ESS) consists of a series of overlapping BSSs, each containing an access
point, with each access point connected together by a wired network. This wired connection
between APs is called a Distribution System (DS).
Operating Mode
The NWA can run in four operating modes as follows:
• Root AP. The NWA is a wireless access point that allows wireless communication to other
devices in the network.
• Repeater. The NWA acts as a wireless repeater and increase a root AP’s wireless coverage
area.
• Client. The NWA acts as a wireless client to access a wireless network.
• MBSSID. The Multiple Basic Service Set Identifier (MBSSID) mode allows you to use one
access point to provide several BSSs simultaneously.
Refer to Chapter 1 on page 9 for illustrations of these wireless applications.
SSID
The SSID (Service Set IDentifier) is the name that identifies the Service Set with which a wireless
station is associated. Wireless stations associating to the access point (AP) must have the same
SSID. In other words, it is the name of the wireless network that clients use to connect to it.
Normally, the NWA acts like a beacon and regularly broadcasts the SSID in the area. You can hide
the SSID instead, in which case the NWA does not broadcast the SSID. In addition, you should
change the default SSID to something that is difficult to guess.
This type of security is fairly weak, however, because there are ways for unauthorized wireless
devices to get the SSID. In addition, unauthorized wireless devices can still see the information that
is sent in the wireless network.
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Channel
A channel is the radio frequency(ies) used by wireless devices. Channels available depend on your
geographical area. You may have a choice of channels (for your region) so you should use a
different channel than an adjacent AP (access point) to reduce interference.
Wireless Mode
The IEEE 802.1x standard was designed to extend the features of IEEE 802.11 to support extended
authentication as well as providing additional accounting and control features.
MBSSID
Traditionally, you needed to use different APs to configure different Basic Service Sets (BSSs). As
well as the cost of buying extra APs, there was also the possibility of channel interference. The
NWA’s MBSSID (Multiple Basic Service Set IDentifier) function allows you to use one access point to
provide several BSSs simultaneously. You can then assign varying levels of privilege to different
SSIDs.
Wireless stations can use different BSSIDs to associate with the same AP.
The following are some notes on multiple BSS.
• A maximum of four BSSs are allowed on one AP simultaneously.
• You must use different WEP keys for different BSSs. If two stations have different BSSIDs (they
are in different BSSs), but have the same WEP keys, they may hear each other’s communications
(but not communicate with each other).
• MBSSID should not replace but rather be used in conjunction with 802.1x security.
Wireless Security
Wireless security is vital to your network. It protects communications between wireless stations,
access points and the wired network.
Figure 20 Securing the Wireless Network
In the figure above, the NWA checks the identity of devices before giving them access to the
network. In this scenario, Computer A is denied access to the network, while Computer B is
granted connectivity.
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The NWA secure communications via data encryption, wireless client authentication and MAC
address filtering. It can also hide its identity in the network.
User Authentication
Authentication is the process of verifying whether a wireless device is allowed to use the wireless
network. You can make every user log in to the wireless network before they can use it. However,
every device in the wireless network has to support IEEE 802.1x to do this.
For wireless networks, you can store the user names and passwords for each user in a RADIUS
server. This is a server used in businesses more than in homes. If you do not have a RADIUS server,
you cannot set up user names and passwords for your users.
Unauthorized wireless devices can still see the information that is sent in the wireless network,
even if they cannot use the wireless network. Furthermore, there are ways for unauthorized
wireless users to get a valid user name and password. Then, they can use that user name and
password to use the wireless network.
The following table shows the relative effectiveness of wireless security methods:.
Table 10 Wireless Security Levels
SECURITY
LEVEL
Least
Secure
SECURITY TYPE
Unique SSID (Default)
Unique SSID with Hide SSID Enabled
MAC Address Filtering
WEP Encryption
IEEE802.1x EAP with RADIUS Server Authentication
WPA2
Most Secure
The available security modes in your NWA are as follows:
• None. No data encryption.
• WEP. Wired Equivalent Privacy (WEP) encryption scrambles the data transmitted between the
wireless stations and the access points to keep network communications private.
• WPA2. WPA2 (IEEE 802.11i) is a wireless security standard that defines stronger encryption,
authentication and key management.
• WPA2-MIX. This commands the NWA to use either WPA2 depending on which security mode
the wireless client uses.
• WPA2-PSK. This adds a pre-shared key on top of WPA2 standard.
• WPA2-PSK-MIX. This commands the NWA to use WPA2-PSK depending on which security
mode the wireless client uses.
Note: To guarantee 802.11n wireless speed, please only use WPA2 or WPA2-PSK security
mode. Other security modes may degrade the wireless speed performance to
802.11g.
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Chapter 6 Wireless LAN
Passphrase
A passphrase functions like a password. In WEP security mode, it is further converted by the NWA
into a complicated string that is referred to as the “key”. This key is requested from all devices
wishing to connect to a wireless network.
PSK
The Pre-Shared Key (PSK) is a password shared by a wireless access point and a client during a
previous secure connection. The key can then be used to establish a connection between the two
parties.
Encryption
Wireless networks can use encryption to protect the information that is sent in the wireless
network. Encryption is like a secret code. If you do not know the secret code, you cannot
understand the message. Encryption is the process of converting data into unreadable text. This
secures information in network communications. The intended recipient of the data can “unlock” it
with a pre-assigned key, making the information readable only to him. The NWA when used as a
wireless client employs Temporal Key Integrity Protocol (TKIP) data encryption.
EAP
Extensible Authentication Protocol (EAP) is a protocol used by a wireless client, an access point and
an authentication server to negotiate a connection.
The EAP methods employed by the NWA when in Wireless Client operating mode are Transport
Layer Security (TLS), Protected Extensible Authentication Protocol (PEAP), Lightweight Extensible
Authentication Protocol (LEAP) and Tunneled Transport Layer Security (TTLS). The authentication
protocol may either be Microsoft Challenge Handshake Authentication Protocol Version 2
(MSCHAPv2) or Generic Token Card (GTC).
Further information on these terms can be found in Appendix E on page 178.
RADIUS
Remote Authentication Dial In User Service (RADIUS) is a protocol that can be used to manage user
access to large networks. It is based on a client-server model that supports authentication,
authorization and accounting. The access point is the client and the server is the RADIUS server.
Figure 21 RADIUS Server Setup
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Chapter 6 Wireless LAN
In the figure above, wireless clients A and B are trying to access the Internet via the NWA. The
NWA in turn queries the RADIUS server if the identity of clients A and U are allowed access to the
Internet. In this scenario, only client U’s identity is verified by the RADIUS server and allowed
access to the Internet.
The RADIUS server handles the following tasks:
• Authentication which determines the identity of the users.
• Authorization which determines the network services available to authenticated users once
they are connected to the network.
• Accounting which keeps track of the client’s network activity.
RADIUS is a simple package exchange in which your AP acts as a message relay between the
wireless client and the network RADIUS server.
You should know the IP addresses, ports and share secrets of the external RADIUS server and/or
the external RADIUS accounting server you want to use with your NWA. You can configure a
primary and backup RADIUS and RADIUS accounting server for your NWA.
6.4 Wireless Settings Screen
Use this screen to choose the operating mode for your NWA. Click Network > Wireless LAN >
Wireless Settings, Network > Wireless LAN > Wireless Settings- 2.4G or Network >
Wireless LAN > Wireless Settings - 5G. The screen varies depending upon the operating mode
you select.
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6.4.1 Root AP Mode
Use this screen to use your NWA as an access point. Select Root AP as the Operation Mode. The
following screen displays.
Figure 22 Wireless LAN > Wireless Settings: Root AP
The following table describes the general wireless LAN labels in this screen.
Table 11 Wireless LAN > Wireless Settings: Root AP
LABEL
DESCRIPTION
Basic Settings
Wireless LAN
Interface
Select the check box to turn on the wireless LAN on the NWA.
Operation Mode
Select Root AP from the drop-down list.
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Chapter 6 Wireless LAN
Table 11 Wireless LAN > Wireless Settings: Root AP (continued)
LABEL
DESCRIPTION
Wireless Mode
If you are in the Wireless LAN > Wireless Settings or Wireless LAN > Wireless
Settings- 2.4G screen, you can select from the following:
•
•
•
802.11b/g to allow both IEEE802.11b and IEEE802.11g compliant WLAN devices to
associate with the NWA. The transmission rate of your NWA might be reduced.
802.11b/g/n to allow IEEE802.11b, IEEE802.11g and IEEE802.11n compliant WLAN
devices to associate with the NWA. The transmission rate of the NWA might be
reduced.
802.11n to allow only IEEE802.11n compliant WLAN devices to associate with the
NWA.
If you are in the Wireless LAN > Wireless Settings- 5G screen, you can select from
the following:
•
•
•
•
802.11a/n to allow IEEE802.11a and IEEE802.11n compliant WLAN devices to
associate with the NWA.
802.11a to allow only IEEE802.11a compliant WLAN devices to associate with the
NWA.
802.11n to allow only IEEE802.11n compliant WLAN devices to associate with the
NWA.
802.11a/n/ac to allow IEEE802.11a, IEEE802.11n and IEEE802.11ac compliant
WLAN devices to associate with the NWA. The transmission rate of the NWA might be
reduced.
Channel
Select the operating frequency/channel depending on your particular region from the
drop-down list box.
Channel Width
This field displays only when you select 802.11n, 802.11a/n, 802.11b/g/n or
802.11a/n/ac in the Wireless Mode field.
A standard 20MHz channel offers transfer speeds of up to 150Mbps whereas a 40MHz
channel uses two standard channels and offers speeds of up to 300Mbps. However, not all
devices support 40MHz channels.
Select the channel bandwidth you want to use for your wireless network.
It is recommended that you select 20/40MHz. This allows the NWA to adjust the channel
bandwidth depending on network conditions.
Select 20MHz if you want to lessen radio interference with other wireless devices in your
neighborhood or the wireless clients do not support channel bonding.
Select SSID
Profile
The SSID (Service Set IDentifier) identifies the Service Set with which a wireless station is
associated. Wireless stations associating to the access point (AP) must have the same
SSID. You can have up to four SSIDs active at the same time.
Note: If you are configuring the NWA from a computer connected to the wireless LAN and
you change the NWA’s SSID or security settings, you will lose your wireless
connection when you press Apply to confirm. You must then change the wireless
settings of your computer to match the NWA’s new settings.
This is the index number of each SSID profile.
Active
Select the check box to enable an SSID profile. Otherwise, clear the check box.
Profile
Select an SSID Profile from the drop-down list box.
Repeater Settings
The repeater function allows the NWA in root AP or repeater mode to set up a wireless connection between it
and another NWA in root AP or repeater mode.
Note: Repeater security is independent of the security settings between the NWA and any wireless clients.
Local MAC
Address
58
Local MAC Address is the MAC address of your NWA.
NWA1000 Series User’s Guide
Chapter 6 Wireless LAN
Table 11 Wireless LAN > Wireless Settings: Root AP (continued)
LABEL
DESCRIPTION
Repeater SSID
Profile
Select the SSID profile you want to use for repeater connections.
Note: You can only configure None, or WPA2-PSK security mode for the SSID used by a
repeater connection.
Advanced Settings
Beacon Interval
When a wirelessly network device sends a beacon, it includes with it a beacon interval.
This specifies the time period before the device sends the beacon again. The interval tells
receiving devices on the network how long they can wait in lowpower mode before waking
up to handle the beacon. A high value helps save current consumption of the access point.
DTIM Interval
Delivery Traffic Indication Message (DTIM) is the time period after which broadcast and
multicast packets are transmitted to mobile clients in the Active Power Management
mode. A high DTIM value can cause clients to lose connectivity with the network.
Output Power
Set the output power of the NWA in this field. If there is a high density of APs in an area,
decrease the output power of the NWA to reduce interference with other APs. Select one
of the following Full (Full Power), 50%, 25%, or 12.5%. See the product specifications
for more information on your NWA’s output power.
Preamble Type
Select Dynamic to have the AP automatically use short preamble when wireless adapters
support it, otherwise the AP uses long preamble.
Select Long if you are unsure what preamble mode the wireless adapters support, and to
provide more reliable communications in busy wireless networks.
RTS/CTS
Threshold
(Request To Send) The threshold (number of bytes) for enabling RTS/CTS handshake.
Data with its frame size larger than this value will perform the RTS/CTS handshake.
Setting this attribute to be larger than the maximum MSDU (MAC service data unit) size
turns off the RTS/CTS handshake. Setting this attribute to its smallest value (1) turns on
the RTS/CTS handshake.
Extension
Channel
Protection Mode
You can use CTS to self or RTS-CTS protection mechanism to reduce conflicts with other
wireless networks or hidden wireless clients. The throughput of RTS-CTS is much lower
than CTS to self. Using this mode may decrease your wireless performance.
A-MPDU
Aggregation
This field is available only when 802.11n, 802.11b/g/n, 802.11a/n or 802.11a/n/ac
is selected as the Wireless Mode.
Select to enable A-MPDU aggregation.
Message Protocol Data Unit (MPDU) aggregation collects Ethernet frames along with their
802.11n headers and wraps them in a 802.11n MAC header. This method is useful for
increasing bandwidth throughput in environments that are prone to high error rates.
Short GI
This field is available only when 802.11n, 802.11b/g/n, 802.11a/n or 802.11a/n/ac
is selected as the Wireless Mode.
Select Enabled to use Short GI (Guard Interval). The guard interval is the gap
introduced between data transmission from users in order to reduce interference.
Reducing the GI increases data transfer rates but also increases interference. Increasing
the GI reduces data transfer rates but also reduces interference.
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Chapter 6 Wireless LAN
Table 11 Wireless LAN > Wireless Settings: Root AP (continued)
LABEL
DESCRIPTION
MCS Rate
The MCS Rate table is available only when 802.11n, 802.11b/g/n, 802.11a/n or
802.11a/n/ac is selected in the Wireless Mode field.
IEEE 802.11n supports many different data rates which are called MCS rates. MCS stands
for Modulation and Coding Scheme. This is an 802.11n feature that increases the wireless
network performance in terms of throughput.
For each MCS Rate (0-15), select either Enabled to have the NWA use the data rate.
Clear the Enabled check box if you do not want the NWA to use the data rate.
Turn on the Auto option to have the NWA set the data rates automatically to optimize the
throughput.
Note: You can set the NWA to use up to four MCS rates at a time.
60
Apply
Click Apply to save your changes.
Cancel
Click Cancel to begin configuring this screen afresh.
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Chapter 6 Wireless LAN
6.4.2 Repeater Mode
Use this screen to have the NWA act as a wireless repeater. You need to know the MAC address of
the peer device, which also must be in Repeater or Root AP mode.
Figure 23 Wireless LAN > Wireless Settings: Repeater
The following table describes the bridge labels in this screen.
Table 12 Wireless LAN > Wireless Settings: Repeater
LABEL
DESCRIPTION
Basic Settings
Wireless LAN
Interface
Select the check box to turn on the wireless LAN on the NWA.
Operation Mode
Select Repeater from the drop-down list.
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Chapter 6 Wireless LAN
Table 12 Wireless LAN > Wireless Settings: Repeater (continued)
LABEL
DESCRIPTION
Wireless Mode
If you are in the Wireless LAN > Wireless Settings or Wireless LAN > Wireless
Settings- 2.4G screen, you can select from the following:
•
•
•
802.11b/g to allow both IEEE802.11b and IEEE802.11g compliant WLAN devices to
associate with the NWA. The transmission rate of your NWA might be reduced.
802.11b/g/n to allow IEEE802.11b, IEEE802.11g and IEEE802.11n compliant WLAN
devices to associate with the NWA. The transmission rate of the NWA might be
reduced.
802.11n to allow only IEEE802.11n compliant WLAN devices to associate with the
NWA.
If you are in the Wireless LAN > Wireless Settings- 5G screen, you can select from
the following:
•
•
•
•
802.11a/n to allow IEEE802.11a and IEEE802.11n compliant WLAN devices to
associate with the NWA.
802.11a to allow only IEEE802.11a compliant WLAN devices to associate with the
NWA.
802.11n to allow only IEEE802.11n compliant WLAN devices to associate with the
NWA.
802.11a/n/ac to allow IEEE802.11a, IEEE802.11n and IEEE802.11ac compliant
WLAN devices to associate with the NWA. The transmission rate of the NWA might be
reduced.
Channel
Select the operating frequency/channel depending on your particular region from the
drop-down list box.
Channel Width
This field displays only when you select 802.11n, 802.11a/n, 802.11b/g/n or
802.11a/n/ac in the Wireless Mode field.
A standard 20MHz channel offers transfer speeds of up to 150Mbps whereas a 40MHz
channel uses two standard channels and offers speeds of up to 300Mbps. However, not all
devices support 40MHz channels.
Select the channel bandwidth you want to use for your wireless network.
It is recommended that you select 20/40MHz. This allows the NWA to adjust the channel
bandwidth depending on network conditions.
Select 20MHz if you want to lessen radio interference with other wireless devices in your
neighborhood or the wireless clients do not support channel bonding.
Repeater Settings
The repeater function allows the NWA in root AP or repeater mode to set up a wireless connection between it
and another NWA in root AP or repeater mode.
Note: Repeater security is independent of the security settings between the NWA and any wireless clients.
Local MAC
Address
Local MAC Address is the MAC address of your NWA.
Repeater SSID
Profile
Select the SSID profile you want to use for repeater connections with an AP or repeater or
regular wireless connections with wireless clients.
Note: You can only configure None, or WPA2-PSK security mode for the SSID used by a
repeater connection.
Root MAC
Address
Specify the peer device’s MAC address. The peer device can be a NWA in either root AP
mode or repeater mode.
Advanced Settings
Beacon Interval
62
When a wirelessly network device sends a beacon, it includes with it a beacon interval.
This specifies the time period before the device sends the beacon again. The interval tells
receiving devices on the network how long they can wait in lowpower mode before waking
up to handle the beacon. A high value helps save current consumption of the access point.
NWA1000 Series User’s Guide
Chapter 6 Wireless LAN
Table 12 Wireless LAN > Wireless Settings: Repeater (continued)
LABEL
DESCRIPTION
DTIM Interval
Delivery Traffic Indication Message (DTIM) is the time period after which broadcast and
multicast packets are transmitted to mobile clients in the Active Power Management
mode. A high DTIM value can cause clients to lose connectivity with the network.
Output Power
Set the output power of the NWA in this field. If there is a high density of APs in an area,
decrease the output power of the NWA to reduce interference with other APs. Select one
of the following Full (Full Power), 50%, 25% or 12.5%. See the product specifications
for more information on your NWA’s output power.
Preamble Type
Select Dynamic to have the AP automatically use short preamble when wireless adapters
support it, otherwise the AP uses long preamble.
Select Long if you are unsure what preamble mode the wireless adapters support, and to
provide more reliable communications in busy wireless networks.
RTS/CTS
Threshold
(Request To Send) The threshold (number of bytes) for enabling RTS/CTS handshake.
Data with its frame size larger than this value will perform the RTS/CTS handshake.
Setting this attribute to be larger than the maximum MSDU (MAC service data unit) size
turns off the RTS/CTS handshake. Setting this attribute to its smallest value (1) turns on
the RTS/CTS handshake.
Extension
Channel
Protection Mode
You can use CTS to self or RTS-CTS protection mechanism to reduce conflicts with other
wireless networks or hidden wireless clients. The throughput of RTS-CTS is much lower
than CTS to self. Using this mode may decrease your wireless performance.
A-MPDU
Aggregation
This field is available only when 802.11n, 802.11b/g/n, 802.11a/n or 802.11a/n/ac
is selected as the Wireless Mode.
Select to enable A-MPDU aggregation.
Message Protocol Data Unit (MPDU) aggregation collects Ethernet frames along with their
802.11n headers and wraps them in a 802.11n MAC header. This method is useful for
increasing bandwidth throughput in environments that are prone to high error rates.
Short GI
This field is available only when 802.11n, 802.11b/g/n, 802.11a/n or 802.11a/n/ac
is selected as the Wireless Mode.
Select Enabled to use Short GI (Guard Interval). The guard interval is the gap
introduced between data transmission from users in order to reduce interference.
Reducing the GI increases data transfer rates but also increases interference. Increasing
the GI reduces data transfer rates but also reduces interference.
MCS Rate
The MCS Rate table is available only when 802.11n, 802.11b/g/n, 802.11a/n or
802.11a/n/ac is selected in the Wireless Mode field.
IEEE 802.11n supports many different data rates which are called MCS rates. MCS stands
for Modulation and Coding Scheme. This is an 802.11n feature that increases the wireless
network performance in terms of throughput.
For each MCS Rate (0-15), select either Enabled to have the NWA use the data rate.
Clear the Enabled check box if you do not want the NWA to use the data rate.
Turn on the Auto option to have the NWA set the data rates automatically to optimize the
throughput.
Note: You can set the NWA to use up to four MCS rates at a time.
Apply
Click Apply to save your changes.
Cancel
Click Cancel to begin configuring this screen afresh.
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Chapter 6 Wireless LAN
6.4.3 Wireless Client Mode
Use this screen to turn your NWA into a wireless client. Select Client as the Operation Mode. The
following screen displays.
Figure 24 Wireless LAN > Wireless Settings: Wireless Client
The following table describes the general wireless LAN labels in this screen.
Table 13 Wireless LAN > Wireless Settings: Wireless Client
LABEL
DESCRIPTION
Basic Settings
Wireless LAN
Interface
Select the check box to turn on the wireless LAN on the NWA.
Operation Mode
Select Client in this field.
Site Survey
Click this to view a list of available wireless access points within the range. Select the AP
you want to use.
Note: After selecting Client as the Operation Mode in the Basic Settings section, you must
click Apply to be able to select from the AP list.
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Table 13 Wireless LAN > Wireless Settings: Wireless Client (continued)
LABEL
DESCRIPTION
SSID Profile
The SSID (Service Set IDentifier) identifies the Service Set with which a wireless station is
associated. Wireless stations associating to the access point (AP) must have the same
SSID.
In this field, select the SSID profile of the AP you want to use. Click Apply.
The SSID used in the selected SSID profile automatically changes to be the one you select
in the Site Survey screen.
Set the security configuration for this operating mode in the Wireless LAN > Security
screen. Check the Dashboard screen to check if the settings you set show in the WLAN
information.
Note: If you are configuring the NWA from a computer connected to the wireless LAN and you
change the NWA’s SSID or security settings, you will lose your wireless connection
when you press Apply to confirm. You must then change the wireless settings of your
computer to match the NWA’s new settings.
Channel
This shows the operating frequency/channel in use. This field is read-only when you select
Client as your operation mode.
Channel Width
This field is not available in the NWA1123-NI.
A standard 20MHz channel offers transfer speeds of up to 150Mbps whereas a 40MHz
channel uses two standard channels and offers speeds of up to 300Mbps. However, not all
devices support 40MHz channels.
Select the channel bandwidth you want to use for your wireless network.
It is recommended that you select 20/40MHz. This allows the NWA to adjust the channel
bandwidth depending on network conditions.
Select 20MHz if you want to lessen radio interference with other wireless devices in your
neighborhood or the AP do not support channel bonding.
Advanced Settings
Output Power
Set the output power of the NWA in this field. If there is a high density of APs in an area,
decrease the output power of the NWA to reduce interference with other APs. Select one of
the following Full (Full Power), 50%, 25% or 12.5%. See the product specifications for
more information on your NWA’s output power.
Preamble Type
Select Dynamic to have the NWA automatically use short preamble when the wireless
network your NWA is connected to supports it, otherwise the NWA uses long preamble.
Select Long preamble if you are unsure what preamble mode the wireless device your NWA
is connected to supports, and to provide more reliable communications in busy wireless
networks.
RTS/CTS
Threshold
(Request To Send) The threshold (number of bytes) for enabling RTS/CTS handshake. Data
with its frame size larger than this value will perform the RTS/CTS handshake. Setting this
attribute to be larger than the maximum MSDU (MAC service data unit) size turns off the
RTS/CTS handshake. Setting this attribute to its smallest value (1) turns on the RTS/CTS
handshake.
Extension
channel
protection mode
You can use CTS to self or RTS-CTS protection mechanism to reduce conflicts with other
wireless networks or hidden wireless clients. The throughput of RTS-CTS is much lower
than CTS to self. Using this mode may decrease your wireless performance.
A-MPDU
Aggregation
This field is not available in the NWA1100-NH and NWA1123-NI.
Select to enable A-MPDU aggregation.
Message Protocol Data Unit (MPDU) aggregation collects Ethernet frames along with their
802.11n headers and wraps them in a 802.11n MAC header. This method is useful for
increasing bandwidth throughput in environments that are prone to high error rates.
NWA1000 Series User’s Guide
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Chapter 6 Wireless LAN
Table 13 Wireless LAN > Wireless Settings: Wireless Client (continued)
LABEL
DESCRIPTION
Short GI
This field is not available in the NWA1100-NH and NWA1123-NI.
Select Enabled to use Short GI (Guard Interval). The guard interval is the gap introduced
between data transmission from users in order to reduce interference. Reducing the GI
increases data transfer rates but also increases interference. Increasing the GI reduces data
transfer rates but also reduces interference.
66
Apply
Click Apply to save your changes.
Cancel
Click Cancel to begin configuring this screen afresh.
NWA1000 Series User’s Guide
Chapter 6 Wireless LAN
6.4.4 MBSSID Mode
Use this screen to have the NWA function in MBSSID mode. Select MBSSID as the Operation
Mode. The following screen diplays.
Figure 25 Wireless LAN > Wireless Settings: MBSSID
The following table describes the labels in this screen.
Table 14 Wireless LAN > Wireless Settings: MBSSID
LABEL
DESCRIPTION
Basic Settings
Wireless LAN
Interface
Select the check box to turn on the wireless LAN on the NWA.
Operation Mode
Select MBSSID from the drop-down list.
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Chapter 6 Wireless LAN
Table 14 Wireless LAN > Wireless Settings: MBSSID (continued)
LABEL
DESCRIPTION
Wireless Mode
If you are in the Wireless LAN > Wireless Settings or Wireless LAN > Wireless
Settings- 2.4G screen, you can select from the following:
•
•
•
802.11b/g to allow both IEEE802.11b and IEEE802.11g compliant WLAN devices to
associate with the NWA. The transmission rate of your NWA might be reduced.
802.11b/g/n to allow IEEE802.11b, IEEE802.11g and IEEE802.11n compliant WLAN
devices to associate with the NWA. The transmission rate of the NWA might be
reduced.
802.11n to allow only IEEE802.11n compliant WLAN devices to associate with the
NWA.
If you are in the Wireless LAN > Wireless Settings- 5G screen, you can select from
the following:
•
•
•
•
802.11a/n to allow IEEE802.11a and IEEE802.11n compliant WLAN devices to
associate with the NWA.
802.11a to allow only IEEE802.11a compliant WLAN devices to associate with the
NWA.
802.11n to allow only IEEE802.11n compliant WLAN devices to associate with the
NWA.
802.11a/n/ac to allow IEEE802.11a, IEEE802.11n and IEEE802.11ac compliant
WLAN devices to associate with the NWA. The transmission rate of the NWA might be
reduced.
Channel
Select the operating frequency/channel depending on your particular region from the
drop-down list box.
Channel Width
This field displays only when you select 802.11n, 802.11a/n, 802.11b/g/n or
802.11a/n/ac in the Wireless Mode field.
A standard 20MHz channel offers transfer speeds of up to 150Mbps whereas a 40MHz
channel uses two standard channels and offers speeds of up to 300Mbps. However, not all
devices support 40MHz channels.
Select the channel bandwidth you want to use for your wireless network.
Select 20MHz if you want to lessen radio interference with other wireless devices in your
neighborhood or the wireless clients do not support channel bonding.
Select SSID
Profile
The SSID (Service Set IDentifier) identifies the Service Set with which a wireless station is
associated. Wireless stations associating to the access point (AP) must have the same
SSID. You can have up to eight SSIDs active at the same time.
Note: If you are configuring the NWA from a computer connected to the wireless LAN and
you change the NWA’s SSID or security settings, you will lose your wireless
connection when you press Apply to confirm. You must then change the wireless
settings of your computer to match the NWA’s new settings.
This is the index number of each SSID profile.
Active
Select the check box to enable an SSID profile. Otherwise, clear the check box.
Profile
Select an SSID Profile from the drop-down list box.
Advanced Settings
68
Beacon Interval
When a wirelessly network device sends a beacon, it includes with it a beacon interval.
This specifies the time period before the device sends the beacon again. The interval tells
receiving devices on the network how long they can wait in lowpower mode before waking
up to handle the beacon. A high value helps save current consumption of the access point.
DTIM Interval
Delivery Traffic Indication Message (DTIM) is the time period after which broadcast and
multicast packets are transmitted to mobile clients in the Active Power Management
mode. A high DTIM value can cause clients to lose connectivity with the network.
Output Power
Set the output power of the NWA in this field. If there is a high density of APs in an area,
decrease the output power of the NWA to reduce interference with other APs. Select one
of the following Full (Full Power), 50%, 25% or 12.5%. See the product specifications
for more information on your NWA’s output power.
NWA1000 Series User’s Guide
Chapter 6 Wireless LAN
Table 14 Wireless LAN > Wireless Settings: MBSSID (continued)
LABEL
DESCRIPTION
Preamble Type
Select Dynamic to have the AP automatically use short preamble when wireless adapters
support it, otherwise the AP uses long preamble.
Select Long if you are unsure what preamble mode the wireless adapters support, and to
provide more reliable communications in busy wireless networks.
RTS/CTS
Threshold
(Request To Send) The threshold (number of bytes) for enabling RTS/CTS handshake.
Data with its frame size larger than this value will perform the RTS/CTS handshake.
Setting this attribute to be larger than the maximum MSDU (MAC service data unit) size
turns off the RTS/CTS handshake. Setting this attribute to its smallest value (1) turns on
the RTS/CTS handshake.
Extension
Channel
Protection Mode
You can use CTS to self or RTS-CTS protection mechanism to reduce conflicts with other
wireless networks or hidden wireless clients. The throughput of RTS-CTS is much lower
than CTS to self. Using this mode may decrease your wireless performance.
A-MPDU
Aggregation
This field is available only when 802.11n, 802.11b/g/n, 802.11a/n or 802.11a/n/ac
is selected as the Wireless Mode.
Select to enable A-MPDU aggregation.
Message Protocol Data Unit (MPDU) aggregation collects Ethernet frames along with their
802.11n headers and wraps them in a 802.11n MAC header. This method is useful for
increasing bandwidth throughput in environments that are prone to high error rates.
Short GI
This field is available only when 802.11n, 802.11b/g/n, 802.11a/n or 802.11a/n/ac
is selected as the Wireless Mode.
Select Enabled to use Short GI (Guard Interval). The guard interval is the gap
introduced between data transmission from users in order to reduce interference.
Reducing the GI increases data transfer rates but also increases interference. Increasing
the GI reduces data transfer rates but also reduces interference.
MCS Rate
The MCS Rate table is available only when 802.11n, 802.11b/g/n or 802.11a/n or
802.11a/n/ac is selected in the Wireless Mode field.
IEEE 802.11n supports many different data rates which are called MCS rates. MCS stands
for Modulation and Coding Scheme. This is an 802.11n feature that increases the wireless
network performance in terms of throughput.
For each MCS Rate (0-15), select either Enabled to have the NWA use the data rate.
Clear the Enabled check box if you do not want the NWA to use the data rate.
Turn on the Auto option to have the NWA set the data rates automatically to optimize the
throughput.
Note: You can set the NWA to use up to four MCS rates at a time.
Apply
Click Apply to save your changes.
Cancel
Click Cancel to begin configuring this screen afresh.
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6.5 SSID Screen
Use this screen to view and modify the settings of the SSID profiles on the NWA. Click Wireless
LAN > SSID to display the screen as shown.
Figure 26 Wireless LAN > SSID
The following table describes the labels in this screen.
Table 15 Wireless LAN > SSID
LABEL
DESCRIPTION
Profile Settings
70
This field displays the index number of each SSID profile.
Profile Name
This field displays the identification name of each SSID profile on the NWA.
SSID
This field displays the SSID (Service Set IDentifier), that is, the name of the wireless
network to which a wireless client can connect. When a wireless client scans for an AP
to associate with, this is the name that is broadcast and seen in the wireless client
utility.
Security
This field indicates which security profile is currently associated with each SSID
profile. See Section 6.6 on page 72 for more information.
RADIUS
This field displays which RADIUS profile is currently associated with each SSID
profile, if you have a RADIUS server configured.
QoS
This field displays the Quality of Service setting for this profile or NONE if QoS is not
configured on a profile.
MAC Filter
This field displays which MAC filter profile is currently associated with each SSID
profile, or Disable if MAC filtering is not configured on an SSID profile.
Edit
Click Edit to go to the SSID configuration screen where you can modify settings in an
SSID profile.
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6.5.1 Configuring SSID
Use this screen to configure an SSID profile. In the Wireless LAN > SSID screen, click Edit next
to the SSID profile you want to configure to display the following screen.
Figure 27 SSID: Edit
The following table describes the labels in this screen.
Table 16 SSID: Edit
LABEL
DESCRIPTION
Profile Name
This is the name that identifying this profile.
SSID
When a wireless client scans for an AP to associate with, this is the name that is
broadcast and seen in the wireless client utility.
Security
Select a security profile to use with this SSID profile. See Section 6.6 on page 72 for
more information. If you do not want this profile to use wireless security, select
Disabled.
RADIUS
Select a RADIUS profile from the drop-down list box, if you have a RADIUS server
configured. If you do not need to use RADIUS authentication, ignore this field. See
Section 6.7 on page 78 for more information.
MAC Filtering
Select a MAC filter profile from the drop-down list box. If you do not want to use MAC
filtering on this profile, select Disabled.
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Table 16 SSID: Edit (continued)
LABEL
DESCRIPTION
QoS
Select the Quality of Service priority for this BSS’s traffic.
•
•
•
If you select WMM from the QoS list, the priority of a data packet depends on the
packet’s IEEE 802.1q or DSCP header. If a packet has no WMM value assigned to
it, it is assigned the default priority.
If you select WMM_VOICE, WMM_VIDEO, WMM_BESTEFFORT or
WMM_BACKGROUND, the NWA applies that QoS setting to all of that SSID’s
traffic.
If you select None, the NWA applies no priority to traffic on this SSID.
Note: When you configure an SSID profile’s QoS settings, the NWA applies the same
QoS setting to all of the profile’s traffic.
BSSID VLAN ID
Enter a VLAN ID for the SSID profile.
Packets coming from the WLAN using this SSID profile are tagged with the VLAN ID
number by the NWA.
Number of Wireless
Stations Allowed to
Associate
Use this field to set a maximum number of wireless stations that may connect to the
device.
Hidden SSID
If you do not select the checkbox, the NWA broadcasts this SSID (a wireless client
scanning for an AP will find this SSID). Alternatively, if you select the checkbox, the
NWA hides this SSID (a wireless client scanning for an AP will not find this SSID).
Intra-BSS Traffic
Blocking
Select this to prevent wireless clients in this profile’s BSS from communicating with
one another.
Enable Layer-2
Isolation
Select this to enable layer-2 isolation for this profile. Wireless clients that connect to
the WLAN using this SSID can access only certain pre-defined devices. See Section
6.8 on page 80.
Back
Click Back to return to the previous screen.
Apply
Click Apply to save your changes.
Cancel
Click Cancel to begin configuring this screen afresh.
Intra-BSS traffic blocking is enabled automatically when you enable layer-2 isolation.
6.6 Wireless Security Screen
Use this screen to choose the security mode for your NWA.
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Click Wireless LAN > Security. Select the profile that you want to configure and click Edit.
Figure 28 Wireless > Security
The Security Settings screen varies depending upon the security mode you select.
Figure 29 Security: None
Note that some screens display differently depending on the operating mode selected in the
Wireless LAN > Wireless Settings, Network > Wireless LAN > Wireless Settings- 2.4G or
Network > Wireless LAN > Wireless Settings - 5G screen.
Note: You must enable the same wireless security settings on the NWA and on all wireless
clients that you want to associate with it.
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6.6.1 Security: WEP
Use this screen to use WEP as the security mode for your NWA. Select WEP in the Security Mode
field to display the following screen.
Figure 30 Security: WEP
The following table describes the labels in this screen.
Table 17 Security: WEP
74
LABEL
DESCRIPTION
Profile Name
This is the name that identifying this profile.
Security Mode
Choose WEP in this field.
Authentication
Type
Select Open or Shared from the drop-down list box.
Data Encryption
Select 64-bit WEP or 128-bit WEP to enable data encryption.
Passphrase
Enter the passphrase or string of text used for automatic WEP key generation on wireless
client adapters.
Generate
Click this to get the keys from the Passphrase you entered.
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Table 17 Security: WEP (continued)
LABEL
DESCRIPTION
Key 1 to
The WEP keys are used to encrypt data. Both the NWA and the wireless stations must use
the same WEP key for data transmission.
Key 4
If you chose 64-bit WEP, then enter any 5 ASCII characters or 10 hexadecimal
characters ("0-9", "A-F").
If you chose 128-bit WEP, then enter 13 ASCII characters or 26 hexadecimal characters
("0-9", "A-F").
You can configure up to four keys, but only one key can be activated at any one time.
Back
Click Back to return to the previous screen.
Apply
Click Apply to save your changes.
Cancel
Click Cancel to begin configuring this screen afresh.
6.6.2 Security: WPA2, WPA2-MIX
This screen varies depending on the operating mode you select in the Wireless LAN > Wireless
Settings screen.
6.6.2.1 Access Point
Use this screen to employ WPA2 as the security mode for your NWA that is in root AP, MBSSID or
repeater operating mode. Select WPA2 or WPA2-MIX in the Security Mode field to display the
following screen.
Figure 31 Security: WPA2-MIX for Access Point
The following table describes the labels in this screen.
Table 18 Security: WPA2-MIX for Access Point
LABEL
DESCRIPTION
Security Settings
Profile Name
This is the name that identifying this profile.
Security Mode
Choose WPA2 or WPA2-MIX in this field.
Rekey Options
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Table 18 Security: WPA2-MIX for Access Point (continued)
LABEL
DESCRIPTION
Reauthentication
Time
Specify how often wireless stations have to resend user names and passwords in order to
stay connected.
Enter a time interval between 0 and 3600 seconds. Enter “0” to turn reauthentication off.
Note: If wireless station authentication is done using a RADIUS server, the reauthentication
timer on the RADIUS server has priority.
Enable Group-Key
Update
Group Key Timer is the rate at which the RADIUS server sends a new group key out to all
clients. Click the check box to enable the Group Key Update and type a number between
100 and 3600 for the time rate.
Back
Click Back to return to the previous screen.
Apply
Click Apply to save your changes.
Cancel
Click Cancel to begin configuring this screen afresh.
6.6.2.2 Wireless Client
Use this screen to employ WPA2 as the security mode for your NWA that is in wireless client
operating mode. Select WPA2 in the Security Mode field to display the following screen.
Figure 32 Security: WPA2 for Wireless Client
The following table describes the labels in this screen.
Table 19 Security: WPA2 for Wireless Client
LABEL
DESCRIPTION
Security Settings
Profile Name
76
This is the name that identifying this profile.
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Table 19 Security: WPA2 for Wireless Client (continued)
LABEL
DESCRIPTION
Security Mode
Choose the same security mode used by the AP.
Rekey Option
Reauthentication
Time
Specify how often wireless stations have to resend user names and passwords in order to
stay connected.
Enter a time interval between 0 and 3600 seconds. Enter “0” to turn reauthentication off.
If wireless station authentication is done using a RADIUS server, the reauthentication timer
on the RADIUS server has priority.Enter how often the external authentication server
requires a connected wireless client to reauthenticate itself to the server again.
Enable Group-key
Update
Group Key Timer is the rate at which the RADIUS server sends a new group key out to all
clients. Click the check box to enable the Group Key Update and type a number between
100 and 3600 for the time rate.
Apply
Click Apply to save your changes.
Cancel
Click Cancel to begin configuring this screen afresh.
6.6.3 Security: WPA2-PSK, WPA2-PSK-MIX
Use this screen to employ WPA2-PSK or WPA2-PSK-MIX as the security mode of your NWA. Select
WPA2-PSK or WPA2-PSK-MIX in the Security Mode field to display the following screen.
Figure 33 Security: WPA2-PSK or WPA2-PSK-MIX
The following table describes the labels not previously discussed
Table 20 Security: WPA2-PSK or WPA2-PSK-MIX
LABEL
DESCRIPTION
Profile Name
This is the name that identifying this profile.
Security Mode
Choose WPA2-PSK or WPA2-PSK-MIX in this field.
Pre-Shared Key
Type a pre-shared key from 8 to 63 case-sensitive ASCII characters (including spaces
and symbols).
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Table 20 Security: WPA2-PSK or WPA2-PSK-MIX (continued)
LABEL
DESCRIPTION
Back
Click Back to return to the previous screen.
Apply
Click Apply to save your changes.
Cancel
Click Cancel to begin configuring this screen afresh.
6.7 RADIUS Screen
Use this screen to set up your NWA’s RADIUS server settings. Click Wireless LAN > RADIUS. The
screen appears as shown.
Figure 34 Wireless LAN > RADIUS
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Select a profile you want to configure and click Edit.
Figure 35 Wireless LAN > RADIUS
The following table describes the labels in this screen.
Table 21 Wireless LAN > RADIUS
LABEL
DESCRIPTION
Profile Name
This is the name that identifying this RADIUS profile.
Primary RADIUS
Server
Select the check box to enable user authentication through an external authentication
server.
Primary Server IP
Address
Enter the IP address of the RADIUS server to be used for authentication.
Primary Server
Port
Enter the port number of the RADIUS server to be used for authentication.
Primary Share
Secret
Enter a password (up to 64 alphanumeric characters) as the key to be shared
between the external authentication server and the NWA. The key must be the same
on the external authentication server and your NWA. The key is not sent over the
network.
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Table 21 Wireless LAN > RADIUS (continued)
LABEL
DESCRIPTION
Backup RADIUS
Server
If the NWA cannot communicate with the primary RADIUS server, you can have the
NWA use a backup RADIUS server. Make sure the check box is selected if you want to
use the backup server.
The NWA will attempt to communicate three times before using the backup server.
Requests can be issued from the client interface to use the backup server. The length
of time for each authentication is decided by the wireless client or based on the
configuration of the Reauthentication Time field in the Wireless LAN > Security
screen.
Backup Server IP
Address
Enter the IP address of the RADIUS server to be used for authentication.
Backup Server
Port
Enter the port number of the RADIUS server to be used for authentication.
Backup Share
Secret
Enter a password (up to 64 alphanumeric characters) as the key to be shared
between the external authentication server and the NWA. The key must be the same
on the external authentication server and your NWA. The key is not sent over the
network.
Primary Accounting
Server
Select the check box to enable user accounting through an external authentication
server.
Primary Server IP
Address
Enter the IP address of the external accounting server in dotted decimal notation.
Primary Server
Port
Enter the port number of the external accounting server.
Primary Share
Secret
Enter a password (up to 64 alphanumeric characters) as the key to be shared
between the external accounting server and the NWA. The key must be the same on
the external accounting server and your NWA. The key is not sent over the network.
Backup Accounting
Server
If the NWA cannot communicate with the primary accounting server, you can have
the NWA use a backup accounting server. Make sure the check box is selected if you
want to use the backup server.
The NWA will attempt to communicate three times before using the backup server.
Backup Server IP
Address
Enter the IP address of the external accounting server in dotted decimal notation.
Backup Server
Port
Enter the port number of the external accounting server.
Backup Share
Secret
Enter a password (up to 64 alphanumeric characters) as the key to be shared
between the external accounting server and the NWA. The key must be the same on
the external accounting and your NWA. The key is not sent over the network.
Back
Click Back to return to the previous screen.
Apply
Click Apply to save your changes.
Cancel
Click Cancel to begin configuring this screen afresh.
6.8 Layer-2 Isolation
Layer-2 isolation is used to prevent wireless clients associated with your NWA from communicating
with other wireless clients, APs, computers or routers in a network.
In the following example, layer-2 isolation is enabled on the NWA to allow a guest wireless client
(A) to access the main network router (B). The router provides access to the Internet and the
network printer (C) while preventing the client from accessing other computers and servers on the
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network. The client can communicate with other wireless clients only if Intra-BSS Traffic blocking is
disabled.
Note: Intra-BSS Traffic Blocking is activated when you enable layer-2 isolation.
Figure 36 Layer-2 Isolation Application
MAC addresses that are not listed in the layer-2 isolation table are blocked from communicating
with the NWA’s wireless clients except for broadcast packets. Layer-2 isolation does not check the
traffic between wireless clients that are associated with the same AP. Intra-BSS Traffic allows
wireless clients associated with the same AP to communicate with each other.
6.8.1 Layer-2 Isolation Screen
Use this screen to specify devices you want the users on your wireless networks to access. Click
Wireless LAN > Layer-2 Isolation. The screen displays as shown.
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Note: You need to know the MAC address of each wireless client, AP, computer or router
that you want to allow to communicate with the NWA's wireless clients.
Figure 37 Wireless LAN > Layer-2 Isolation
The following table describes the labels in this screen.
Table 22 Wireless LAN > Layer-2 Isolation
LABEL
DESCRIPTION
Index
This is the index number of the MAC address listed.
MAC Address
Enter the MAC addresses of the wireless client, AP, computer or router that you want to
allow the associated wireless clients to have access to in these address fields. Enter the
MAC address in a valid MAC address format (six hexadecimal character pairs, for
example 12:34:56:78:9a:bc).
Description
Enter a name to identify this device.
Apply
Click Apply to save your changes.
Cancel
Click Cancel to begin configuring this screen afresh.
6.9 MAC Filter Screen
Every Ethernet device has a unique MAC (Media Access Control) address. The MAC address is
assigned at the factory and consists of six pairs of hexadecimal characters, for example,
00:A0:C5:00:00:02. You need to know the MAC address of each device to configure MAC filtering
on the NWA.
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The MAC filter function allows you to configure the NWA to grant access to the NWA from other
wireless devices (Allow Association) or exclude devices from accessing the NWA (Deny Association).
Figure 38 MAC Filtering
In the figure above, wireless client U is able to connect to the Internet because its MAC address is
in the allowed association list specified in the NWA. The MAC address of client A is either denied
association or is not in the list of allowed wireless clients specified in the NWA.
Use this screen to enable MAC address filtering in your NWA. You can specify MAC addresses to
either allow or deny association with your NWA. Click Wireless LAN > MAC Filter. The screen
displays as shown.
Figure 39 Wireless LAN > MAC Filter
Select a profile you want to configure and click Edit.
Figure 40 MAC Filter: Edit
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The following table describes the labels in this screen.
Table 23 Wireless LAN > MAC Filter
LABEL
DESCRIPTION
Profile Name
This is the name that identifying this profile.
Access Control Mode
Select Disabled if you do not want to use this feature.
Select Allow to permit access to the NWA. MAC addresses not listed will be denied
access to the NWA.
Select Deny to block access to theNWA. MAC addresses not listed will be allowed to
access the NWA.
This is the index number of the MAC address listed.
MAC Address
Enter the MAC addresses (in XX:XX:XX:XX:XX:XX format) of the wireless station to be
allowed or denied access to the NWA.
Back
Click Back to return to the previous screen.
Apply
Click Apply to save your changes.
Cancel
Click Cancel to begin configuring this screen afresh.
6.10 Technical Reference
This section provides technical background information about the topics covered in this chapter.
Refer to Appendix E on page 178 for further readings on Wireless LAN.
6.10.1 Additional Wireless Terms
Table 24 Additional Wireless Terms
TERM
DESCRIPTION
Intra-BSS Traffic
This describes direct communication (not through the NWA) between two wireless
devices within a wireless network. You might disable this kind of communication to
enhance security within your wireless network.
RTS/CTS Threshold
In a wireless network which covers a large area, wireless devices are sometimes not
aware of each other’s presence. This may cause them to send information to the AP
at the same time and result in information colliding and not getting through.
By setting this value lower than the default value, the wireless devices must
sometimes get permission to send information to the NWA. The lower the value, the
more often the devices must get permission.
Preamble
84
A preamble affects the timing in your wireless network. There are two preamble
modes: long and short. If a device uses a different preamble mode than the NWA
does, it cannot communicate with the NWA.
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TERM
DESCRIPTION
Roaming
If you have two or more NWAs (or other wireless access points) on your wireless
network, you can enable this option so that wireless devices can change locations
without having to log in again. This is useful for devices, such as notebooks, that
move around a lot.
Antenna
An antenna couples Radio Frequency (RF) signals onto air. A transmitter within a
wireless device sends an RF signal to the antenna, which propagates the signal
through the air. The antenna also operates in reverse by capturing RF signals from
the air.
Positioning the antennas properly increases the range and coverage area of a wireless
LAN.
6.10.2 WMM QoS
WMM (Wi-Fi MultiMedia) QoS (Quality of Service) ensures quality of service in wireless networks. It
controls WLAN transmission priority on packets to be transmitted over the wireless network.
WMM QoS prioritizes wireless traffic according to the delivery requirements of the individual and
applications. WMM QoS is a part of the IEEE 802.11e QoS enhancement to certified Wi-Fi wireless
networks.
On APs without WMM QoS, all traffic streams are given the same access priority to the wireless
network. If the introduction of another traffic stream creates a data transmission demand that
exceeds the current network capacity, then the new traffic stream reduces the throughput of the
other traffic streams.
The NWA uses WMM QoS to prioritize traffic streams according to the IEEE 802.1q or DSCP
information in each packet’s header. The NWA automatically determines the priority to use for an
individual traffic stream. This prevents reductions in data transmission for applications that are
sensitive to latency and jitter (variations in delay).
6.10.2.1 WMM QoS Priorities
The following table describes the WMM QoS priority levels that the NWA uses.
Table 25 WMM QoS Priorities
Priority Level
description
voice
Typically used for traffic that is especially sensitive to jitter. Use this priority to
reduce latency for improved voice quality.
(WMM_VOICE)
video
(WMM_VIDEO)
best effort
(WMM_BESTEFFORT)
background
(WMM_BACKGROUND)
NWA1000 Series User’s Guide
Typically used for traffic which has some tolerance for jitter but needs to be
prioritized over other data traffic.
Typically used for traffic from applications or devices that lack QoS capabilities. Use
best effort priority for traffic that is less sensitive to latency, but is affected by long
delays, such as Internet surfing.
This is typically used for non-critical traffic such as bulk transfers and print jobs
that are allowed but that should not affect other applications and users. Use
background priority for applications that do not have strict latency and throughput
requirements.
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6.10.3 Security Mode Guideline
The following is a general guideline in choosing the security mode for your NWA.
• Use WPA2-PSK if you have WPA2-aware wireless clients but no RADIUS server.
• Use WPA2 security if you have WPA2-aware wireless clients and a RADIUS server. WPA2 has user
authentication and improved data encryption over WEP.
• If you don’t have WPA2-aware wireless clients, then use WEP key encrypting. A higher bit key
offers better security. You can manually enter 64-bit or 128-bit WEP keys.
More information on Wireless Security can be found in Appendix E on page 178.
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LAN and VLAN
7.1 LAN Overview
This chapter describes how you can configure the IP address of your NWA.
The Internet Protocol (IP) address identifies a device 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.
Figure 41 IPv4 Setup
The figure above illustrates one possible setup of your NWA. The gateway IPv4 address is
192.168.1.1 and the IPv4 address of the NWA is 192.168.1.2 (default). The gateway and the device
must belong in the same subnet mask to be able to communicate with each other.
7.2 What You Can Do in the LAN IP Screen
Use the LAN IP screen to configure the IP address of your NWA (see Section 7.6 on page 90).
7.3 What You Need to Know
The Ethernet parameters of the NWA are preset in the factory with the following values:
IP address of 192.168.1.2
Subnet mask of 255.255.255.0 (24 bits)
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IPv6
IPv6 (Internet Protocol version 6), is designed to enhance IP address size and features. The
increase in IPv6 address size to 128 bits (from the 32-bit IPv4 address) allows up to 3.4 x 1038 IP
addresses.
IPv6 Addressing
The 128-bit IPv6 address is written as eight 16-bit hexadecimal blocks separated by colons (:). This
is an example IPv6 address 2001:0db8:1a2b:0015:0000:0000:1a2f:0000.
IPv6 addresses can be abbreviated in two ways:
• Leading zeros in a block can be omitted. So 2001:0db8:1a2b:0015:0000:0000:1a2f:0000 can
be written as 2001:db8:1a2b:15:0:0:1a2f:0.
• Any number of consecutive blocks of zeros can be replaced by a double colon. A double colon can
only appear once in an IPv6 address. So 2001:0db8:0000:0000:1a2f:0000:0000:0015 can be
written as 2001:0db8::1a2f:0000:0000:0015, 2001:0db8:0000:0000:1a2f::0015,
2001:db8::1a2f:0:0:15 or 2001:db8:0:0:1a2f::15.
Prefix and Prefix Length
Similar to an IPv4 subnet mask, IPv6 uses an address prefix to represent the network address. An
IPv6 prefix length specifies how many most significant bits (start from the left) in the address
compose the network address. The prefix length is written as “/x” where x is a number. For
example,
2001:db8:1a2b:15::1a2f:0/32
means that the first 32 bits (2001:db8) is the subnet prefix.
Link-local Address
A link-local address uniquely identifies a device on the local network (the LAN). It is similar to a
“private IP address” in IPv4. You can have the same link-local address on multiple interfaces on a
device. A link-local unicast address has a predefined prefix of fe80::/10. The link-local unicast
address format is as follows.
Table 26 Link-local Unicast Address Format
1111 1110 10
Interface ID
10 bits
54 bits
64 bits
Global Address
A global address uniquely identifies a device on the Internet. It is similar to a “public IP address” in
IPv4. A global unicast address starts with a 2 or 3.
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7.4 VLAN Overview
This section discusses how to configure the NWA’s VLAN settings.
Figure 42 Management VLAN Setup
In the figure above, to access and manage the NWA from computer A, the NWA and switch B’s
ports to which computer A and the NWA are connected should be in the same VLAN.
7.5 What You Need to Know
Introduction to VLANs
A Virtual Local Area Network (VLAN) allows a physical network to be partitioned into multiple logical
networks. Devices on a logical network belong to one group. A device can belong to more than one
group. With VLAN, a device cannot directly talk to or hear from devices that are not in the same
group(s); the traffic must first go through a router.
In Multi-Tenant Unit (MTU) applications, VLAN is vital in providing isolation and security among the
subscribers. When properly configured, VLAN prevents one subscriber from accessing the network
resources of another on the same LAN, thus a user will not see the printers and hard disks of
another user in the same building.
VLAN also increases network performance by limiting broadcasts to a smaller and more
manageable logical broadcast domain. In traditional switched environments, all broadcast packets
go to each and every individual port. With VLAN, all broadcasts are confined to a specific broadcast
domain.
IEEE 802.1Q Tag
The IEEE 802.1Q standard defines an explicit VLAN tag in the MAC header to identify the VLAN
membership of a frame across bridges. A VLAN tag includes the 12-bit VLAN ID and 3-bit user
priority. The VLAN ID associates a frame with a specific VLAN and provides the information that
devices need to process the frame across the network.
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7.6 LAN IP Screen
Use this screen to configure the IP address for your NWA. Click Network > LAN to display the
following screen.
Figure 43 LAN IP
The following table describes the labels in this screen.
Table 27 LAN IP
LABEL
DESCRIPTION
IPv4 Address
Assignment
Obtain IP Address
Automatically
Select this option if your NWA is using a dynamically assigned IPv4 address from a
DHCP server each time.
Note: You must know the IP address assigned to the NWA (by the DHCP server) to
access the NWA again.
Use Fixed IP Address
IP Address
Select this option if your NWA is using a static IPv4 address. When you select this
option, fill in the fields below.
Enter the IP address of your NWA in dotted decimal notation.
Note: If you change the NWA's IP address, you must use the new IP address if you
want to access the web configurator again.
90
Subnet Mask
Type the subnet mask.
Gateway IP
Address
Type the IPv4 address of the gateway. The gateway is an immediate neighbor of your
NWA that will forward the packet to the destination. On the LAN, the gateway must
be a router on the same segment as your NWA; over the WAN, the gateway must be
the IP address of one of the remote nodes.
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Table 27 LAN IP (continued)
LABEL
DESCRIPTION
IPv6 Address
Assignment
Enable Stateful
Address Autoconfiguration
Select this to turn on IPv6 stateful auto-configuration to have the NWA obtain an
IPv6 global address from a DHCPv6 server in your network.
IPv6 Address/Prefix
Length
Enter your IPv6 address and prefix manually.
System DNS Servers
Primary DNS Server
Enter the IPv4 address of the first DNS (Domain Name Service) server, if provided.
Secondary DNS Server
Enter the IPv4 address of the second DNS (Domain Name Service) server address, if
provided.
VLAN Settings
802.1q VLAN
Select this to enable VLAN tagging on the NWA.
Management VLAN
ID
Enter a number from 1 to 4094 to define the NWA’s management VLAN group.
As Native VLAN
Click this check box to enable As Native VLAN. If enabled, only untagged packets
may access to the CPU of NWA. If disabled, only tagged packets shall be forwarded
to the matched VLAN. Select this check box to treat this VLAN ID as a VLAN created
on the NWA and not one assigned to it from outside the network.
Green Ethernet
Energy Efficient
Ethernet (EEE)
Click the check box to enable Energy-Efficient Ethernet (EEE). When enabled, it turns
on power saving mode. If disabled, only tagged packets with matched VLAN-ID may
access the NWA.
Apply
Click Apply to save your changes.
Cancel
Click Cancel to begin configuring this screen afresh.
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System
8.1 Overview
This chapter shows you how to enable remote management of your NWA. It provides information
on determining which services or protocols can access which of the NWA’s interfaces.
Remote Management allows a user to administrate the device over the network. You can manage
your NWA from a remote location via the following interfaces:
• WLAN
• LAN
• Both WLAN and LAN
• Neither (Disable)
Figure 44 Remote Management Example
In the figure above, the NWA (A) is being managed by a desktop computer (B) connected via LAN
(Land Area Network). It is also being accessed by a notebook (C) connected via WLAN (Wireless
LAN).
8.2 What You Can Do in this Chapter
• Use the WWW screen to configure through which interface(s) and from which IP address(es) you
can use the Web Browser to manage the NWA (see Section 8.4 on page 95).
• Use the Certificates screen to delete and import certificates (seen Section 8.5 on page 96).
• Use the Telnet screen to configure through which interface(s) and from which IP address(es)
you can use Telnet to manage the NWA. A Telnet connection is prioritized by the NWA over other
remote management sessions (see Section 8.6 on page 97).
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• Use the SNMP screen to configure through which interface(s) and from which IP address(es) a
network systems manager can access the NWA (see Section 8.7 on page 99).
• Use the FTP screen to configure through which interface(s) and from which IP address(es) you
can use File Transfer Protocol (FTP) to manage the NWA. You can use FTP to upload the latest
firmware for example (see Section 8.8 on page 101).
8.3 What You Need To Know
WWW
The World Wide Web allows you to access files hosted in a remote server. For example, you can
view text files (usually referred to as ‘pages’) using your web browser via HyperText Transfer
Protocol (HTTP).
Telnet
Telnet is short for Telecommunications Network, which is a client-side protocol that enables you to
access a device over the network.
FTP
File Transfer Protocol (FTP) allows you to upload or download a file or several files to and from a
remote location using a client or the command console.
SNMP
Simple Network Management Protocol (SNMP) is a member of the TCP/IP protocol suite used for
exchanging management information between network devices.
Your NWA supports SNMP agent functionality, which allows a manager station to manage and
monitor the NWA through the network. The NWA supports SNMP version one (SNMPv1), version
two (SNMPv2c) and version three (SNMPv3).
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The next figure illustrates an SNMP management operation.
Figure 45 SNMP Management Mode
A SNMP managed network consists of two main types of component: agents and a manager.
An agent is a management software module that resides in a managed device (the NWA). 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.
SNMP allows a manager and agents to communicate for the purpose of accessing information such
as packets received, node port status, etc.
SNMP v3 and Security
SNMP v3 enhances security for SNMP management. SNMP managers can be required to
authenticate with agents before conducting SNMP management sessions.
Security can be further enhanced by encrypting the SNMP messages sent from the managers.
Encryption protects the contents of the SNMP messages. When the contents of the SNMP messages
are encrypted, only the intended recipients can read them.
Remote Management Limitations
Remote management over LAN or WLAN will not work when:
• You have disabled that service in one of the remote management screens.
• The IP address in the Secured Client IP Address field does not match the client IP address. If
it does not match, the NWA will disconnect the session immediately.
• You may only have one remote management session running at one time. The NWA
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:
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Telnet
HTTP
Certificate
A certificate contains the certificate owner’s identity and public key. Certificates provide a way to
exchange public keys for use in authentication.
Figure 46 Certificates Example
In the figure above, the NWA (Z) checks the identity of the notebook (A) using a certificate before
granting access to the network.
The certification authority certificate that you can import to your NWA should be in PFX PKCS#12
file format. This format referred to as the Personal Information Exchange Syntax Standard is
comprised of a private key-public certificate pair that is further encrypted with a password. Before
you import a certificate into the NWA, you should verify that you have the correct certificate.
Key distribution is simple and very secure since you can freely distribute public keys and you never
need to transmit private keys.
8.4 WWW Screen
Use this screen to configure your NWA via the World Wide Web (WWW) using a Web browser. This
lets you specify which IP addresses or computers are able to communicate with and access the
NWA.
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To change your NWA’s WWW settings, click System > WWW. The following screen shows.
Figure 47 System > WWW
The following table describes the labels in this screen.
Table 28 System > WWW
LABEL
DESCRIPTION
WWW
HTTP 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.
HTTPS Port
The HTTPS proxy server listens on port 443 by default. If you change the HTTPS proxy
server port to a different number on the NWA, for example 8443, then you must notify
people who need to access the NWA web configurator to use “https://NWA IP
Address:8443” as the URL.
Secure Access
Control
Select the interface(s) through which a computer may access the NWA using WWW and
to which the IP and MAC filtering rules you specified below are applied. Otherwise, select
Disable to allow any computer to access the NWA through any interface using WWW.
Secured Client IP
Address
A secured client is a “trusted” computer that is allowed to communicate with the NWA
using this service.
Select All to allow any computer to access the NWA using this service.
Choose Selected to just allow the computer with the IP address that you specify to
access the NWA using this service.
Secured Client
MAC Address
Select All to allow any computer to access the NWA using this service.
Apply
Click Apply to save your customized settings.
Cancel
Click Cancel to begin configuring this screen afresh.
Choose Selected to just allow the computer with the MAC address that you specify to
access the NWA using this service.
8.5 Certificates Screen
Use this screen to delete or import certificates.
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Click System > Certificates. The following screen shows.
Figure 48 System > Certificates
The following table describes the labels in this screen.
Table 29 System > Certificates
LABEL
DESCRIPTION
Import Certificate
Import
Certificate
Enter the location of a previously-saved certificate to upload to the NWA. Alternatively,
click the Browse button to locate a list.
Browse
Click this button to locate a previously-saved certificate to upload to the NWA.
Import
Click this button to upload the previously-saved certificate displayed in the Import
Certificate field to the NWA.
Delete Certificate
You can delete a
certificate
Select the certificate from the list that you want to delete.
Delete
Click this to delete the selected certificate.
8.6 Telnet Screen
Use this screen to configure your NWA for remote Telnet access. You can use Telnet to access the
NWA’s Command Line Interface (CLI).
Click System > Telnet. The following screen displays.
Figure 49 System > Telnet
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The following table describes the labels in this screen.
Table 30 System > Telnet
LABEL
DESCRIPTION
TELNET
Port
You can 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.
Secure Access
Control
Select the interface(s) through which a computer may access the NWA using Telnet and
to which the IP and MAC filtering rules you specified below are applied. Otherwise, select
Disable to allow any computer to access the NWA through any interface using Telnet.
Secured Client IP
Address
A secured client is a “trusted” computer that is allowed to communicate with the NWA
using this service.
Select All to allow any computer to access the NWA using this service.
Choose Selected to just allow the computer with the IP address that you specify to
access the NWA using this service.
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Secured Client
MAC Address
Select All to allow any computer to access the NWA using this service.
Apply
Click Apply to save your customized settings.
Cancel
Click Cancel to begin configuring this screen afresh.
Choose Selected to just allow the computer with the MAC address that you specify to
access the NWA using this service.
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8.7 SNMP Screen
Use this screen to have a manager station administrate your NWA over the network and configure
SNMP accounts on the SNMP v3 manager. A SNMP administrator/user is a SNMP manager. To
change your NWA’s SNMP settings, click System > SNMP. The following screen displays.
Figure 50 System > SNMP
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The following table describes the labels in this screen.
Table 31 System > SNMP
LABEL
DESCRIPTION
SNMP
Port
You can 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.
Secure Access
Control
Select the interface(s) through which a computer may access the NWA using SNMP and
to which the IP and MAC filtering rules you specified below are applied. Otherwise,
select Disable to allow any computer to access the NWA through any interface using
SNMP.
Secured Client IP
Address
A secured client is a “trusted” computer that is allowed to communicate with the NWA
using this service.
Select All to allow any computer to access the NWA using this service.
Choose Selected to just allow the computer with the IP address that you specify to
access the NWA using this service.
Secured Client MAC
Address
Select All to allow any computer to access the NWA using this service.
Choose Selected to just allow the computer with the MAC address that you specify to
access the NWA using this service.
SNMP Configuration
Protocol Version
Select the SNMP version for the NWA, which you allow the SNMP manager to use to
access the NWA.
The SNMP version on the NWA must match the version on the SNMP manager.
Get Community
Enter the Get Community, which is the password for the incoming Get and GetNext
requests from the management station.
Set Community
Enter the Set community, which is the password for incoming Set requests from the
management station.
Trap Community
Type the trap community, which is the password sent with each trap to the SNMP
manager.
Trap Destination
Type the IP address of the station to send your SNMP traps to.
SNMPv3 Admin
Settings
SNMPv3 Admin
Select the check box to enable the SNMP administrator account for authentication with
SNMP managers using SNMP v3.
User Name
Specify the user name of the SNMP administrator account.
Password
Enter the password for SNMP administrator authentication.
Confirm Password
Retype the password for confirmation.
Access Type
Specify the SNMP administrator’s access rights to MIBs.
Read/Write - The SNMP administrator has read and write rights, meaning that the
user can create and edit the MIBs on the NWA.
Read Only - The SNMP administrator has read rights only, meaning the user can collect
information from the NWA.
Authentication
Protocol
Select an authentication algorithm used for SNMP communication with the SNMP
administrator.
MD5 (Message Digest 5) and SHA (Secure Hash Algorithm) are hash algorithms used
to authenticate SNMP data. SHA authentication is generally considered stronger than
MD5, but is slower.
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Table 31 System > SNMP (continued)
LABEL
DESCRIPTION
Privacy Protocol
Specify the encryption method used for SNMP communication with the SNMP
administrator.
DES - Data Encryption Standard is a widely used (but breakable) method of data
encryption. It applies a 56-bit key to each 64-bit block of data.
AES - Advanced Encryption Standard is another method for data encryption that also
uses a secret key. AES applies a 128-bit key to 128-bit blocks of data.
SNMPv3 User
Settings
SNMPv3 User
Select the check box to enable the SNMP user account for authentication with SNMP
managers using SNMP v3.
User Name
Specify the user name of the SNMP user account.
Password
Enter the password for SNMP user authentication.
Confirm Password
Retype the password for confirmation.
Access Type
Specify the SNMP user’s access rights to MIBs.
Read Only - The SNMP user has read rights only, meaning the user can collect
information from the NWA.
Read/Write - The SNMP user has read and write rights, meaning that the user can
create and edit the MIBs on the NWA.
Authentication
Protocol
Select an authentication algorithm used for SNMP communication with the SNMP user.
Privacy Protocol
Specify the encryption method used for SNMP communication with the SNMP user.
MD5 (Message Digest 5) and SHA (Secure Hash Algorithm) are hash algorithms used
to authenticate SNMP data. SHA authentication is generally considered stronger than
MD5, but is slower.
DES - Data Encryption Standard is a widely used (but breakable) method of data
encryption. It applies a 56-bit key to each 64-bit block of data.
AES - Advanced Encryption Standard is another method for data encryption that also
uses a secret key. AES applies a 128-bit key to 128-bit blocks of data.
Apply
Click Apply to save your customized settings.
Cancel
Click Cancel to begin configuring this screen afresh.
8.8 FTP Screen
Use this screen to upload and download the NWA’s firmware using FTP. To use this feature, your
computer must have an FTP client.
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To change your NWA’s FTP settings, click System > FTP. The following screen displays.
Figure 51 System > FTP
The following table describes the labels in this screen.
Table 32 System > FTP
LABEL
DESCRIPTION
FTP
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.
Secure Access
Control
Select the interface(s) through which a computer may access the NWA using this service
and to which the IP and MAC filtering rules you specified below are applied. Otherwise,
select Disable to allow any computer to access the NWA through any interface using this
service.
Secured Client IP
Address
A secured client is a “trusted” computer that is allowed to communicate with the NWA
using this service.
Select All to allow any computer to access the NWA using this service.
Choose Selected to just allow the computer with the IP address that you specify to access
the NWA using this service.
Secured Client
MAC Address
Select All to allow any computer to access the NWA using this service.
Apply
Click Apply to save your customized settings.
Cancel
Click Cancel to begin configuring this screen afresh.
Choose Selected to just allow the computer with the MAC address that you specify to
access the NWAe using this service.
8.9 Technical Reference
This section provides some technical background information about the topics covered in this
chapter.
8.9.1 MIB
Managed devices in an SMNP managed network contain object variables or managed objects that
define each piece of information to be collected about a device. Examples of variables include such
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as number of packets received, node port status etc. A Management Information Base (MIB) is a
collection of managed objects.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.
8.9.2 Supported MIBs
The NWA supports MIB II that is defined in RFC-1213 and RFC-1215 as well as the proprietary
ZyXEL private MIB. The purpose of the MIBs is to let administrators collect statistical data and
monitor status and performance.
8.9.3 Private-Public Certificates
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 should look. When people know what
your signature looks 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.
Tim 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).
Tim 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.
Tim uses his private key to sign the message and sends it to Jenny.
Jenny receives the message and uses Tim’s public key to verify it. Jenny knows that the message is
from Tim, and 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).
Additionally, Jenny uses her own private key to sign a message and Tim uses Jenny’s public key to
verify the message.
8.9.4 Certification 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
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certification authorities. You can use the NWA to generate certification requests that contain
identifying information and public keys and then send the certification requests to a certification
authority.
8.9.5 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.
Browse to where you have the certificate saved on your computer.
Make sure that the certificate has a “.cer” or “.crt” file name extension.
Figure 52 Certificates on Your Computer
Double-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 53 Certificate Details
104
Use 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 according to your
situation. Possible examples would be over the telephone or through an HTTPS connection.
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Log Settings
9.1 Overview
This chapter provides information on viewing and generating logs on your NWA.
Logs are files that contain recorded network activity over a set period. They are used by
administrators to monitor the health of the system(s) they are managing. Logs enable
administrators to effectively monitor events, errors, progress, etc. so that when network problems
or system failures occur, the cause or origin can be traced. Logs are also essential for auditing and
keeping track of changes made by users.
Figure 54
Accessing Logs in the Network
The figure above illustrates three ways to access logs. The user (U) can access logs directly from
the NWA (A) via the Web configurator. Logs can also be located in an external log server (B). An
email server (C) can also send harvested logs to the user’s email account.
9.2 What You Can Do in this Chapter
Use the Log Settings screen to configure where and when the NWA will send the logs, and which
logs it will send (Section 9.4 on page 106). Use the Monitor > Logs screen to display all logs or
logs for a certain category.
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9.3 What You Need To Know
Alerts and Logs
An alert is a type of log that warrants more serious attention. Some categories such as System
Error consist of both logs and alerts. You can differentiate them by their color in the Monitor >
Logs screen. Alerts are displayed in red and logs are displayed in black.
Receiving Logs via E-mail
If you want to receive logs in your e-mail account, you need to have the necessary details ready,
such as the Server Name or Simple Mail Transfer Protocol (SMTP) Address of your e-mail account.
Ensure that you have a valid e-mail address.
Enabling Syslog Logging
To enable Syslog Logging, obtain your Syslog server’s IP address (or server name).
9.4 Log Settings Screen
Use this screen to configure to where and when the NWA is to send the logs and which logs and/or
immediate alerts it is to send.
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To change your NWA’s log settings, click Configuration > Log Settings. The screen appears as
shown.
Figure 55 Log Settings
The following table describes the labels in this screen.
Table 33 Log Settings
LABEL
DESCRIPTION
E-mail Log Settings
Mail Server
Enter the server name or the IP address of the mail server for the e-mail addresses
specified below. If this field is left blank, logs and alert messages will not be sent via
e-mail.
Mail Subject
Type a title that you want to be in the subject line of the log e-mail message that the
NWA sends.
Send Log to
Logs are sent to the e-mail address specified in this field. If this field is left blank, logs
will not be sent via e-mail.
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Table 33 Log Settings (continued)
LABEL
DESCRIPTION
SMTP Authentication
SMTP (Simple Mail Transfer Protocol) is the message-exchange standard for the
Internet. Select the check box to activate SMTP authentication. If mail server
authentication is needed but this feature is disabled, you will not receive the e-mail
logs.
If you use SMTP authentication, the mail receiver should be the owner of the SMTP
account.
User Name
If your e-mail account requires SMTP authentication, enter the user name here.
Password
Enter the password associated with the above user name.
Syslog Logging
Syslog logging sends a log to an external syslog server used to store logs.
Syslog Logging
Select the check box to enable syslog logging.
Syslog Server IP
Address
Enter the IP address of the syslog server that will log the selected categories of logs.
Syslog Port
Number
Enter the port number of the syslog server that will log the selected categories of
logs.
Send Log
Log Schedule
This drop-down menu is used to configure the frequency of log messages being sent
as E-mail:
•
•
•
•
•
When Log is Full
Hourly
Daily
Weekly
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.
Clear log after
sending mail
Select the check box to clear all logs after logs and alert messages are sent via email.
Log Category
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System
Maintenance
Click this to receive logs related to system maintenance.
System Error
Click this to receive logs related to system errors.
802.1x
Click this to receive logs related to the 802.1x mode.
Wireless
Click this to receive logs related to the wireless function.
Email Log Now
Select the categories of alerts for which you want the NWA to immediately send email alerts.
Apply
Click Apply to save your customized settings.
Cancel
Click Cancel to begin configuring this screen afresh.
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Maintenance
10.1 Overview
This chapter describes the maintenance screens. It discusses how you can upload new firmware,
manage configuration and restart your NWA without turning it off and on.
This chapter provides information and instructions on how to identify and manage your NWA over
the network.
Figure 56 NWA Setup
In the figure above, the NWA connects to a Domain Name Server (DNS) server to avail of a domain
name. It also connects to a Network Time Protocol (NTP) server to set the time on the device.
10.2 What You Can Do in this Chapter
• Use the General screen to specify the system name (see Section 10.4 on page 110).
• Use the Password screen to manage the password for your NWA (see Section 10.5 on page
111).
• Use the Time screen to change your NWA’s time and date. This screen allows you to configure
the NWA’s time based on your local time zone (see Section 10.6 on page 112).
• Use the Firmware Upgrade screen to upload the latest firmware for your NWA (see Section
10.7 on page 113).
• Use the Configuration File screen to view information related to factory defaults, backup
configuration, and restoring configuration (see Section 10.8 on page 114).
• Use the Restart screen to reboot the NWA without turning the power off (see Section 10.9 on
page 116).
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10.3 What You Need To Know
You can find the firmware for your device at www.zyxel.com. It is a file that uses the system project
code with a "*.bin" extension, for example "V100AAEO0.bin". The upload process uses HTTP
(Hypertext Transfer Protocol) and may take up to two minutes. After a successful upload, the
system will reboot.
10.4 General Screen
Use the General screen to identify your NWA over the network. Click Maintenance > General.
The following screen displays.
Figure 57 Maintenance > General
The following table describes the labels in this screen.
Table 34 Maintenance > General
LABEL
DESCRIPTION
System Settings
System Name
Type a descriptive name to identify the NWA in the Ethernet network.
This name can be up to 15 alphanumeric characters long. Spaces are not allowed, but
dashes "-" are accepted.
110
Apply
Click Apply to save your changes.
Cancel
Click Cancel to reload the previous configuration for this screen.
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10.5 Password Screen
Use this screen to control access to your NWA by assigning a password to it. Click Maintenance >
Password. The following screen displays.
Figure 58 Maintenance > Password
The following table describes the labels in this screen.
Table 35 Maintenance > Password
LABEL
DESCRIPTIONS
Current Password
Type in your existing system password.
New Password
Type your new system password. Note that as you type a password, the screen
displays a dot (.) for each character you type.
Retype to Confirm
Retype your new system password for confirmation.
Apply
Click Apply to save your changes.
Cancel
Click Cancel to reload the previous configuration for this screen.
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10.6 Time Screen
Use this screen to change your NWA’s time and date, click Maintenance > Time. The following
screen displays.
Figure 59 Maintenance > Time
The following table describes the labels in this screen.
Table 36 Maintenance > Time
LABEL
DESCRIPTION
Current Time and Date
Current Time
This field displays the time of your NWA.
Each time you reload this page, the NWA synchronizes the time with the time server
(if configured).
When you disable NTP Client Update, you can manually enter the new time in this
field and then click Apply.
Current Date
This field displays the last updated date from the time server.
When you disable NTP Client Update, you can manually enter the new date in this
field and then click Apply.
Time and Date Setup
NTP Client Update
Select this to have the NWA get the time and date from the time server you
specified below.
NTP server
Select this option to use the predefined list of Network Time Protocol (NTP) servers.
Select an NTP server from the drop-list box.
Manual IP
Select this option to enter the IP address or URL of your time server. Check with
your ISP/network administrator if you are unsure of this information.
Time Zone Setup
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Table 36 Maintenance > Time (continued)
LABEL
DESCRIPTION
Time Zone
Choose the time zone of your location. This will set the time difference between
your time zone and Greenwich Mean Time (GMT).
Adjust for Daylight
Saving Time
Daylight saving is a period from late spring to early fall when many countries set
their clocks ahead of normal local time by one hour to give more daytime light in the
evening.
Select this option if you use Daylight Saving Time.
Start Date
Configure the day and time when Daylight Saving Time starts if you selected Enable
Daylight Saving. The at fields uses the 24 hour format. For example:
Daylight Saving Time starts in most parts of the United States on the second
Sunday of March. Each time zone in the United States starts using Daylight Saving
Time at 2 A.M. local time. So in the United States you would select Second,
Sunday, March and type 2 in the at field.
In the European Union on the last Sunday of March. All of the time zones in the
European Union start using Daylight Saving at the same time (1 A.M. GMT or UTC).
Therefore you should select Last, Sunday, March. The time you type in the at field
depends on your time zone. In Germany for instance, you will type 2 because
Germany’s time zone is one hour ahead of GMT or UTC (GMT +1).
End Date
Configure the day and time when Daylight Saving Time starts if you selected Enable
Daylight Saving. The at fields uses the 24 hour format. For example:
Daylight Saving Time starts in most parts of the United States on the second
Sunday of March. Each time zone in the United States starts using Daylight Saving
Time at 2 A.M. local time. So in the United States you would select First, Sunday,
November and type 2 in the at field.
In the European Union on the last Sunday of March. All of the time zones in the
European Union start using Daylight Saving at the same time (1 A.M. GMT or UTC).
Therefore you should select Last, Sunday, October. The time you type in the at
field depends on your time zone. In Germany for instance, you will type 2 because
Germany’s time zone is one hour ahead of GMT or UTC (GMT +1).
Apply
Click Apply to save your changes.
Cancel
Click Cancel to reload the previous configuration for this screen.
10.7 Firmware Upgrade Screen
Use this screen to upload a firmware to your NWA. Click Maintenance > Firmware Upgrade.
Follow the instructions in this section to upload firmware to your NWA.
Figure 60 Maintenance > Firmware Upgrade
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The following table describes the labels in this screen.
Table 37 Maintenance > Firmware Upgrade
LABEL
DESCRIPTION
File Path
Type in the location of the file you want to upload in this field or click Browse... to find
it.
Browse...
Click Browse... to find the .bin file you want to upload. Remember that you must
decompress compressed (.zip) files before you can upload them.
Upload
Click Upload to begin the upload process. This process may take up to two minutes.
Do not turn off the NWA while firmware upload is in progress!
Figure 61 Firmware Upload In Process
The NWA automatically restarts in this time causing a temporary network disconnect. In some
operating systems, you may see the following icon on your desktop.
Figure 62 Network Temporarily Disconnected
After the upload was finished, log in again and check your new firmware version in the Dashboard
screen.
10.8 Configuration File Screen
Use this screen to backup, restore and reset the configuration of your NWA.
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Click Maintenance > Configuration File. The screen appears as shown next.
Figure 63 Maintenance > Configuration File
10.8.1 Backup Configuration
Backup configuration allows you to back up (save) the NWA’s current configuration to a file on your
computer. Once your NWA is configured and functioning properly, it is highly recommended that
you back up your configuration file before making configuration changes. The backup configuration
file will be useful in case you need to return to your previous settings.
Click Backup to save the NWA’s current configuration to your computer.
10.8.2 Restore Configuration
Restore configuration allows you to upload a new or previously saved configuration file from your
computer to your NWA.
Table 38 Restore Configuration
LABEL
DESCRIPTION
File Path
Type in the location of the file you want to upload in this field or click Browse to find it.
Browse...
Click Browse... to find the file you want to upload. Remember that you must
decompress compressed (.ZIP) files before you can upload them.
Upload
Click Upload to begin the upload process.
Do not turn off the NWA while configuration file upload is in progress.
You must then wait one minute before logging into the NWA again.
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The NWA automatically restarts in this time causing a temporary network disconnect. In some
operating systems, you may see the following icon on your desktop.
Figure 64 Network Temporarily Disconnected
If you uploaded the default configuration file you may need to change the IP address of your
computer to be in the same subnet as that of the default NWA IP address (192.168.1.2). See
Appendix A on page 122 for details on how to set up your computer’s IP address.
10.8.3 Back to Factory Defaults
Pressing the Reset button in this section clears all user-entered configuration information and
returns the NWA to its factory defaults as shown on the screen. The following screen will appear.
Figure 65 Reset Message
You can also press the RESET button to reset your NWA to its factory default settings. Refer to
Section 2.3 on page 20 for more information.
10.9 Restart Screen
Use this screen to reboot the NWA without turning the power off.
Click Maintenance > Restart. The following screen displays.
Figure 66 Maintenance > Restart
Click Restart to have the NWA reboot. This does not affect the NWA's configuration.
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11
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
• NWA Access and Login
• Internet Access
• Wireless LAN
11.1 Power, Hardware Connections, and LEDs
The NWA does not turn on. None of the LEDs turn on.
Make sure you are using the power adaptor or cord included with the NWA.
Make sure the power adaptor or cord is connected to the NWA and plugged in to an appropriate
power source. Make sure the power source is turned on.
Disconnect and re-connect the power adaptor or cord to the NWA.
If the problem continues, contact the vendor.
One of the LEDs does not behave as expected.
Make sure you understand the normal behavior of the LED. See Section 1.7 on page 16.
Check the hardware connections. See the Quick Start Guide.
Inspect your cables for damage. Contact the vendor to replace any damaged cables.
Disconnect and re-connect the power adaptor to the NWA.
If the problem continues, contact the vendor.
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11.2 NWA Access and Login
I forgot the IP address for the NWA.
The default IP address is 192.168.1.2.
If the NWA is working as a DHCP client and receives an IP address from a DHCP server, check the
DHCP server for the NWA’s IP address.
If you configured a static IP address and have forgotten it, you have to reset the device to its
factory defaults. See Section 2.3 on page 20.
I forgot the password.
The default password is 1234.
If this does not work, you have to reset the device to its factory defaults. See Section 2.3 on page
20.
I cannot see or access the Login screen in the web configurator.
Make sure you are using the correct IP address.
• The default IP address is 192.168.1.2.
• If you changed the IP address (Section 7.6 on page 90), 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 NWA.
Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick
Start Guide and Section 1.7 on page 16.
Make sure your Internet browser does not block pop-up windows and has JavaScript and Java
enabled. See Section 11.1 on page 117.
Make sure your computer is in the same subnet as the NWA. (If you know that there are routers
between your computer and the NWA, skip this step.)
• If there is no DHCP server on your network, make sure your computer’s IP address is in the
same subnet as the NWA.
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Reset the device to its factory defaults, and try to access the NWA with the default IP address. See
Chapter 2 on page 20.
If the problem continues, contact the network administrator or vendor, or try one of the advanced
suggestions.
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Advanced Suggestions
• Try to access the NWA using another service, such as Telnet. If you can access the NWA, check
the remote management settings to find out why the NWA 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 NWA.
Make sure you have entered the user name and password correctly. The default user name is
admin and default password is 1234. This fields are case-sensitive, so make sure [Caps Lock] is
not on.
Disconnect and re-connect the power adaptor or cord to the NWA.
If this does not work, you have to reset the device to its factory defaults. See Section 2.3 on page
20.
I cannot use FTP to upload new firmware.
See the troubleshooting suggestions for I cannot see or access the Login screen in the web
configurator. Ignore the suggestions about your browser.
11.3 Internet Access
I cannot access the Internet through the NWA.
Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick
Start Guide and Section 11.1 on page 117.
Make sure your NWA is connected to a networking device that provides Internet access.
Make sure your computer is set to obtain a dynamic IP address or has an IP address which is in the
same subnet as the broadband modem or router.
If you are trying to access the Internet wirelessly, make sure the wireless settings on the wireless
client are the same as the settings on the AP.
Disconnect all the cables from your device, and follow the directions in the Quick Start Guide again.
If the problem continues, contact your ISP.
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I cannot access the Internet anymore. I had access to the Internet (with the NWA), but my
Internet connection is not available anymore.
Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick
Start Guide and Section 1.7 on page 16.
Reboot the NWA.
If the problem continues, contact your ISP or network administrator.
The Internet connection is slow or intermittent.
There might be a lot of traffic on the network. Look at the LEDs, and check Section 1.7 on page 16.
If the NWA is sending or receiving a lot of information, try closing some programs that use the
Internet, especially peer-to-peer applications.
Check the signal strength. If the signal is weak, try moving the NWA (in wireless client mode) closer
to the AP (if possible), and look around to see if there are any devices that might be interfering with
the wireless network (microwaves, other wireless networks, and so on).
Reboot the NWA.
If the problem continues, contact the network administrator or vendor, or try one of the advanced
suggestions.
Advanced Suggestions
• Check the settings for QoS. If it is disabled, you might consider activating it.
11.4 Wireless LAN
I cannot access the NWA or ping any computer from the WLAN.
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Make sure the wireless LAN is enabled on the NWA.
Make sure the wireless adapter on the wireless station is working properly.
Make sure the wireless adapter installed on your computer is IEEE 802.11 compatible and supports
the same wireless standard as the NWA.
Make sure your computer (with a wireless adapter installed) is within the transmission range of the
NWA.
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Check that both the NWA and your wireless client are using the same wireless and wireless security
settings.
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A PPENDIX
Setting Up Your Computer’s IP Address
Note: Your specific NWA may not support all of the operating systems described in this
appendix. See the product specifications for more information about which
operating systems are supported.
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 page 122
• Windows Vista on page 126
• Windows 7 on page 130
• Mac OS X: 10.3 and 10.4 on page 134
• Mac OS X: 10.5 and 10.6 on page 137
• Linux: Ubuntu 8 (GNOME) on page 140
• Linux: openSUSE 10.3 (KDE) on page 144
Windows XP/NT/2000
The following example uses the default Windows XP display theme but can also apply to Windows
2000 and Windows NT.
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Click Start > Control Panel.
In the Control Panel, click the Network Connections icon.
Right-click Local Area Connection and then select Properties.
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On the General tab, select Internet Protocol (TCP/IP) and then click Properties.
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The Internet Protocol TCP/IP Properties window opens.
Select 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 Alternate DNS
server, if that information was provided.
Click OK to close the Internet Protocol (TCP/IP) Properties window.
Click OK to close the Local Area Connection Properties window.
Verifying Settings
Click Start > All Programs > Accessories > Command Prompt.
In 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.
126
Click Start > Control Panel.
In the Control Panel, click the Network and Internet icon.
Click the Network and Sharing Center icon.
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Click Manage network connections.
Right-click Local Area Connection and then select Properties.
Note: During this procedure, click Continue whenever Windows displays a screen saying
that it needs your permission to continue.
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Select Internet Protocol Version 4 (TCP/IPv4) and then select Properties.
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The Internet Protocol Version 4 (TCP/IPv4) Properties window opens.
Select 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 Alternate DNS
server, if that information was provided.Click Advanced.
Click OK to close the Internet Protocol (TCP/IP) Properties window.
10 Click OK to close the Local Area Connection Properties window.
Verifying Settings
Click Start > All Programs > Accessories > Command Prompt.
In 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 7
This section shows screens from Windows 7 Enterprise.
130
Click Start > Control Panel.
In the Control Panel, click View network status and tasks under the Network and Internet
category.
Click Change adapter settings.
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Double click Local Area Connection and then select Properties.
Note: During this procedure, click Continue whenever Windows displays a screen saying
that it needs your permission to continue.
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Select Internet Protocol Version 4 (TCP/IPv4) and then select Properties.
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The Internet Protocol Version 4 (TCP/IPv4) Properties window opens.
Select 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 Alternate DNS
server, if that information was provided. Click Advanced if you want to configure advanced
settings for IP, DNS and WINS.
Click OK to close the Internet Protocol (TCP/IP) Properties window.
Click OK to close the Local Area Connection Properties window.
Verifying Settings
Click Start > All Programs > Accessories > Command Prompt.
In the Command Prompt window, type "ipconfig" and then press [ENTER].
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The IP settings are displayed as follows.
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.
134
Click Apple > System Preferences.
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In the System Preferences window, click the Network icon.
When the Network preferences pane opens, select Built-in Ethernet from the network
connection type list, and then click Configure.
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For dynamically assigned settings, select Using DHCP from the Configure IPv4 list in the TCP/IP
tab.
For 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.
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Click Apply Now 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 67 Mac OS X 10.4: Network Utility
Mac OS X: 10.5 and 10.6
The screens in this section are from Mac OS X 10.5 but can also apply to 10.6.
Click Apple > System Preferences.
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138
In System Preferences, click the Network icon.
When the Network preferences pane opens, select Ethernet from the list of available connection
types.
From the Configure list, select Using DHCP for dynamically assigned settings.
For statically assigned settings, do the following:
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• From the Configure list, select Manually.
• In the IP Address field, enter your IP address.
• In the Subnet Mask field, enter your subnet mask.
• In the Router field, enter the IP address of your NWA.
Click 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 68 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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Click System > Administration > Network.
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When 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.
In the Authenticate window, enter your admin account name and password then click the
Authenticate button.
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In the Network Settings window, select the connection that you want to configure, then click
Properties.
The Properties dialog box opens.
• 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.
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Click OK to save the changes and close the Properties dialog box and return to the Network
Settings screen.
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If 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.
Click the Close button to apply the changes.
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Verifying Settings
Check your TCP/IP properties by clicking System > Administration > Network Tools, and then
selecting the appropriate Network device from the Devices tab. The Interface Statistics
column shows data if your connection is working properly.
Figure 69 Ubuntu 8: Network Tools
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:
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Click K Menu > Computer > Administrator Settings (YaST).
When the Run as Root - KDE su dialog opens, enter the admin password and click OK.
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146
When the YaST Control Center window opens, select Network Devices and then click the
Network Card icon.
When the Network Settings window opens, click the Overview tab, select the appropriate
connection Name from the list, and then click the Configure button.
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When the Network Card Setup window opens, click the Address tab
Figure 70 openSUSE 10.3: Network Card Setup
Select 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.
Click Next to save the changes and close the Network Card Setup window.
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If 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.
Click Finish to save your settings and close the window.
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 71 openSUSE 10.3: KNetwork Manager
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When the Connection Status - KNetwork Manager window opens, click the Statistics tab to
see if your connection is working properly.
Figure 72 openSUSE: Connection Status - KNetwork Manager
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A PPENDIX
Pop-up Windows, JavaScript and Java
Permissions
In order to use the web configurator you need to allow:
• Web browser pop-up windows from your device.
• JavaScript (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
In Internet Explorer, select Tools, Pop-up Blocker and then select Turn Off Pop-up Blocker.
Figure 73 Pop-up Blocker
You can also check if pop-up blocking is disabled in the Pop-up Blocker section in the Privacy tab.
In Internet Explorer, select Tools, Internet Options, Privacy.
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Clear 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 74 Internet Options: Privacy
Click 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.
In Internet Explorer, select Tools, Internet Options and then the Privacy tab.
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Select Settings…to open the Pop-up Blocker Settings screen.
Figure 75 Internet Options: Privacy
152
Type 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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Click Add to move the IP address to the list of Allowed sites.
Figure 76 Pop-up Blocker Settings
Click Close to return to the Privacy screen.
Click Apply to save this setting.
JavaScript
If pages of the web configurator do not display properly in Internet Explorer, check that JavaScript
are allowed.
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In Internet Explorer, click Tools, Internet Options and then the Security tab.
Figure 77 Internet Options: Security
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Click the Custom Level... button.
Scroll down to Scripting.
Under Active scripting make sure that Enable is selected (the default).
Under Scripting of Java applets make sure that Enable is selected (the default).
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Click OK to close the window.
Figure 78 Security Settings - Java Scripting
Java Permissions
From Internet Explorer, click Tools, Internet Options and then the Security tab.
Click the Custom Level... button.
Scroll down to Microsoft VM.
Under Java permissions make sure that a safety level is selected.
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Click OK to close the window.
Figure 79 Security Settings - Java
JAVA (Sun)
156
From Internet Explorer, click Tools, Internet Options and then the Advanced tab.
Make sure that Use Java 2 for  under Java (Sun) is selected.
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Click OK to close the window.
Figure 80 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, Javascript and pop-ups in one screen. Click Tools, then click Options in the
screen that appears.
Figure 81 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 82 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 83 Opera: Allowing Pop-Ups
Enabling Java
From Opera, click Tools, then Preferences. In the Advanced tab, select Content from the leftside menu. Select the check boxes as shown in the following screen.
Figure 84 Opera: Enabling Java
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To customize JavaScript behavior in the Opera browser, click JavaScript Options.
Figure 85 Opera: JavaScript Options
Select the items you want Opera’s JavaScript to apply.
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A PPENDIX
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 86 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 39 Subnet Masks
1ST OCTET: 2ND
OCTET:
(192)
(168)
3RD
OCTET:
4TH OCTET
(1)
(2)
IP Address (Binary)
11000000
10101000
00000001
00000010
Subnet Mask (Binary)
11111111
11111111
11111111
00000000
Network Number
11000000
10101000
00000001
Host ID
00000010
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.
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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.
Table 40 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
255.255.255.248
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 41 Maximum Host Numbers
SUBNET MASK
HOST ID SIZE
MAXIMUM NUMBER OF HOSTS
24
8 bits
255.0.0.0
24 bits
16 bits
255.255.0.0
16 bits
216 – 2
24 bits
29 bits
255.255.255.0
255.255.255.24
8 bits
3 bits
–2
16777214
65534
254
2 –2
2 –2
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.
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The following table shows some possible subnet masks using both notations.
Table 42 Alternative Subnet Mask Notation
SUBNET MASK
ALTERNATIVE
NOTATION
LAST OCTET
(BINARY)
LAST OCTET
(DECIMAL)
255.255.255.0
/24
0000 0000
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
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.
The following figure shows the company network before subnetting.
Figure 87 Subnetting Example: Before Subnetting
You can “borrow” one of the host ID bits to divide the network 192.168.1.0 into two separate subnetworks. 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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Appendix C IP Addresses and Subnetting
The following figure shows the company network after subnetting. There are now two subnetworks, A and B.
Figure 88 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.
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 43 Subnet 1
IP/SUBNET MASK
NETWORK NUMBER
LAST OCTET BIT
VALUE
IP Address (Decimal)
192.168.1.
IP Address (Binary)
11000000.10101000.00000001.
00000000
Subnet Mask (Binary)
11111111.11111111.11111111.
11000000
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Table 43 Subnet 1 (continued)
IP/SUBNET MASK
NETWORK NUMBER
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
LAST OCTET BIT
VALUE
Table 44 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 45 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 46 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
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
Example: Eight Subnets
Similarly, use a 27-bit mask to create eight subnets (000, 001, 010, 011, 100, 101, 110 and 111).
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The following table shows IP address last octet values for each subnet.
Table 47 Eight Subnets
SUBNET
SUBNET
ADDRESS
FIRST ADDRESS
LAST
ADDRESS
BROADCAST
ADDRESS
30
31
32
33
62
63
64
65
94
95
96
97
126
127
128
129
158
159
160
161
190
191
192
193
222
223
224
225
254
255
Subnet Planning
The following table is a summary for subnet planning on a network with a 24-bit network number.
Table 48 24-bit Network Number Subnet Planning
NO. “BORROWED”
HOST BITS
SUBNET MASK
NO. SUBNETS
NO. HOSTS PER
SUBNET
255.255.255.128 (/25)
126
255.255.255.192 (/26)
62
255.255.255.224 (/27)
30
255.255.255.240 (/28)
16
14
255.255.255.248 (/29)
32
255.255.255.252 (/30)
64
255.255.255.254 (/31)
128
The following table is a summary for subnet planning on a network with a 16-bit network number.
Table 49 16-bit Network Number Subnet Planning
NO. “BORROWED”
HOST BITS
SUBNET MASK
NO. SUBNETS
NO. HOSTS PER
SUBNET
255.255.128.0 (/17)
32766
255.255.192.0 (/18)
16382
255.255.224.0 (/19)
8190
255.255.240.0 (/20)
16
4094
255.255.248.0 (/21)
32
2046
255.255.252.0 (/22)
64
1022
255.255.254.0 (/23)
128
510
255.255.255.0 (/24)
256
254
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
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Appendix C IP Addresses and Subnetting
Table 49 16-bit Network Number Subnet Planning (continued)
NO. “BORROWED”
HOST BITS
SUBNET MASK
NO. SUBNETS
NO. HOSTS PER
SUBNET
13
255.255.255.248 (/29)
8192
14
255.255.255.252 (/30)
16384
15
255.255.255.254 (/31)
32768
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 NWA.
Once you have decided on the network number, pick an IP address for your NWA 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 NWA 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 NWA 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
• 172.16.0.0
— 10.255.255.255
— 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.
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A PPENDIX
IPv6
Overview
IPv6 (Internet Protocol version 6), is designed to enhance IP address size and features. The
increase in IPv6 address size to 128 bits (from the 32-bit IPv4 address) allows up to 3.4 x 1038 IP
addresses.
IPv6 Addressing
The 128-bit IPv6 address is written as eight 16-bit hexadecimal blocks separated by colons (:). This
is an example IPv6 address 2001:0db8:1a2b:0015:0000:0000:1a2f:0000.
IPv6 addresses can be abbreviated in two ways:
• Leading zeros in a block can be omitted. So 2001:0db8:1a2b:0015:0000:0000:1a2f:0000 can
be written as 2001:db8:1a2b:15:0:0:1a2f:0.
• Any number of consecutive blocks of zeros can be replaced by a double colon. A double colon can
only appear once in an IPv6 address. So 2001:0db8:0000:0000:1a2f:0000:0000:0015 can be
written as 2001:0db8::1a2f:0000:0000:0015, 2001:0db8:0000:0000:1a2f::0015,
2001:db8::1a2f:0:0:15 or 2001:db8:0:0:1a2f::15.
Prefix and Prefix Length
Similar to an IPv4 subnet mask, IPv6 uses an address prefix to represent the network address. An
IPv6 prefix length specifies how many most significant bits (start from the left) in the address
compose the network address. The prefix length is written as “/x” where x is a number. For
example,
2001:db8:1a2b:15::1a2f:0/32
means that the first 32 bits (2001:db8) is the subnet prefix.
Link-local Address
A link-local address uniquely identifies a device on the local network (the LAN). It is similar to a
“private IP address” in IPv4. You can have the same link-local address on multiple interfaces on a
device. A link-local unicast address has a predefined prefix of fe80::/10. The link-local unicast
address format is as follows.
Table 50 Link-local Unicast Address Format
1111 1110 10
Interface ID
10 bits
54 bits
64 bits
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Global Address
A global address uniquely identifies a device on the Internet. It is similar to a “public IP address” in
IPv4. A global unicast address starts with a 2 or 3.
Unspecified Address
An unspecified address (0:0:0:0:0:0:0:0 or ::) is used as the source address when a device does
not have its own address. It is similar to “0.0.0.0” in IPv4.
Loopback Address
A loopback address (0:0:0:0:0:0:0:1 or ::1) allows a host to send packets to itself. It is similar to
“127.0.0.1” in IPv4.
Multicast Address
In IPv6, multicast addresses provide the same functionality as IPv4 broadcast addresses.
Broadcasting is not supported in IPv6. A multicast address allows a host to send packets to all hosts
in a multicast group.
Multicast scope allows you to determine the size of the multicast group. A multicast address has a
predefined prefix of ff00::/8. The following table describes some of the predefined multicast
addresses.
Table 51 Predefined Multicast Address
MULTICAST ADDRESS
DESCRIPTION
FF01:0:0:0:0:0:0:1
All hosts on a local node.
FF01:0:0:0:0:0:0:2
All routers on a local node.
FF02:0:0:0:0:0:0:1
All hosts on a local connected link.
FF02:0:0:0:0:0:0:2
All routers on a local connected link.
FF05:0:0:0:0:0:0:2
All routers on a local site.
FF05:0:0:0:0:0:1:3
All DHCP severs on a local site.
The following table describes the multicast addresses which are reserved and can not be assigned
to a multicast group.
Table 52 Reserved Multicast Address
MULTICAST ADDRESS
FF00:0:0:0:0:0:0:0
FF01:0:0:0:0:0:0:0
FF02:0:0:0:0:0:0:0
FF03:0:0:0:0:0:0:0
FF04:0:0:0:0:0:0:0
FF05:0:0:0:0:0:0:0
FF06:0:0:0:0:0:0:0
FF07:0:0:0:0:0:0:0
FF08:0:0:0:0:0:0:0
FF09:0:0:0:0:0:0:0
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Table 52 Reserved Multicast Address (continued)
MULTICAST ADDRESS
FF0A:0:0:0:0:0:0:0
FF0B:0:0:0:0:0:0:0
FF0C:0:0:0:0:0:0:0
FF0D:0:0:0:0:0:0:0
FF0E:0:0:0:0:0:0:0
FF0F:0:0:0:0:0:0:0
Subnet Masking
Both an IPv6 address and IPv6 subnet mask compose of 128-bit binary digits, which are divided
into eight 16-bit blocks and written in hexadecimal notation. Hexadecimal uses four bits for each
character (1 ~ 10, A ~ F). Each block’s 16 bits are then represented by four hexadecimal
characters. For example, FFFF:FFFF:FFFF:FFFF:FC00:0000:0000:0000.
Interface ID
In IPv6, an interface ID is a 64-bit identifier. It identifies a physical interface (for example, an
Ethernet port) or a virtual interface (for example, the management IP address for a VLAN). One
interface should have a unique interface ID.
EUI-64
The EUI-64 (Extended Unique Identifier) defined by the IEEE (Institute of Electrical and Electronics
Engineers) is an interface ID format designed to adapt with IPv6. It is derived from the 48-bit (6byte) Ethernet MAC address as shown next. EUI-64 inserts the hex digits fffe between the third and
fourth bytes of the MAC address and complements the seventh bit of the first byte of the MAC
address. See the following example.
Table 53
MAC
00
: 13
: 49
: 12
: 34
: 56
: 13
: 49
: FF
: FE
: 12
: 34
Table 54
EUI-64
02
: 56
Stateless Autoconfiguration
With stateless autoconfiguration in IPv6, addresses can be uniquely and automatically generated.
Unlike DHCPv6 (Dynamic Host Configuration Protocol version six) which is used in IPv6 stateful
autoconfiguration, the owner and status of addresses don’t need to be maintained by a DHCP
server. Every IPv6 device is able to generate its own and unique IP address automatically when
IPv6 is initiated on its interface. It combines the prefix and the interface ID (generated from its own
Ethernet MAC address, see Interface ID and EUI-64) to form a complete IPv6 address.
When IPv6 is enabled on a device, its interface automatically generates a link-local address
(beginning with fe80).
When the interface is connected to a network with a router and the NWA is set to automatically
obtain an IPv6 network prefix from the router for the interface, it generates 1another address which
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Appendix D IPv6
combines its interface ID and global and subnet information advertised from the router. This is a
routable global IP address.
DHCPv6
The Dynamic Host Configuration Protocol for IPv6 (DHCPv6, RFC 3315) is a server-client protocol
that allows a DHCP server to assign and pass IPv6 network addresses, prefixes and other
configuration information to DHCP clients. DHCPv6 servers and clients exchange DHCP messages
using UDP.
Each DHCP client and server has a unique DHCP Unique IDentifier (DUID), which is used for
identification when they are exchanging DHCPv6 messages. The DUID is generated from the MAC
address, time, vendor assigned ID and/or the vendor's private enterprise number registered with
the IANA. It should not change over time even after you reboot the device.
Identity Association
An Identity Association (IA) is a collection of addresses assigned to a DHCP client, through which
the server and client can manage a set of related IP addresses. Each IA must be associated with
exactly one interface. The DHCP client uses the IA assigned to an interface to obtain configuration
from a DHCP server for that interface. Each IA consists of a unique IAID and associated IP
information.
The IA type is the type of address in the IA. Each IA holds one type of address. IA_NA means an
identity association for non-temporary addresses and IA_TA is an identity association for temporary
addresses. An IA_NA option contains the T1 and T2 fields, but an IA_TA option does not. The
DHCPv6 server uses T1 and T2 to control the time at which the client contacts with the server to
extend the lifetimes on any addresses in the IA_NA before the lifetimes expire. After T1, the client
sends the server (S1) (from which the addresses in the IA_NA were obtained) a Renew message. If
the time T2 is reached and the server does not respond, the client sends a Rebind message to any
available server (S2). For an IA_TA, the client may send a Renew or Rebind message at the client's
discretion.
T2
T1
Renew Renew
to S1
to S1
Renew Renew
to S1
to S1
Renew
to S1
Renew
to S1
Rebind
to S2
Rebind
to S2
DHCP Relay Agent
A DHCP relay agent is on the same network as the DHCP clients and helps forward messages
between the DHCP server and clients. When a client cannot use its link-local address and a wellknown multicast address to locate a DHCP server on its network, it then needs a DHCP relay agent
to send a message to a DHCP server that is not attached to the same network.
The DHCP relay agent can add the remote identification (remote-ID) option and the interface-ID
option to the Relay-Forward DHCPv6 messages. The remote-ID option carries a user-defined string,
1.
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Appendix D IPv6
such as the system name. The interface-ID option provides slot number, port information and the
VLAN ID to the DHCPv6 server. The remote-ID option (if any) is stripped from the Relay-Reply
messages before the relay agent sends the packets to the clients. The DHCP server copies the
interface-ID option from the Relay-Forward message into the Relay-Reply message and sends it to
the relay agent. The interface-ID should not change even after the relay agent restarts.
Prefix Delegation
Prefix delegation enables an IPv6 router to use the IPv6 prefix (network address) received from the
ISP (or a connected uplink router) for its LAN. The NWA uses the received IPv6 prefix (for example,
2001:db2::/48) to generate its LAN IP address. Through sending Router Advertisements (RAs)
regularly by multicast, the NWA passes the IPv6 prefix information to its LAN hosts. The hosts then
can use the prefix to generate their IPv6 addresses.
ICMPv6
Internet Control Message Protocol for IPv6 (ICMPv6 or ICMP for IPv6) is defined in RFC 4443.
ICMPv6 has a preceding Next Header value of 58, which is different from the value used to identify
ICMP for IPv4. ICMPv6 is an integral part of IPv6. IPv6 nodes use ICMPv6 to report errors
encountered in packet processing and perform other diagnostic functions, such as "ping".
Neighbor Discovery Protocol (NDP)
The Neighbor Discovery Protocol (NDP) is a protocol used to discover other IPv6 devices and track
neighbor’s reachability in a network. An IPv6 device uses the following ICMPv6 messages types:
• Neighbor solicitation: A request from a host to determine a neighbor’s link-layer address (MAC
address) and detect if the neighbor is still reachable. A neighbor being “reachable” means it
responds to a neighbor solicitation message (from the host) with a neighbor advertisement
message.
• Neighbor advertisement: A response from a node to announce its link-layer address.
• Router solicitation: A request from a host to locate a router that can act as the default router and
forward packets.
• Router advertisement: A response to a router solicitation or a periodical multicast advertisement
from a router to advertise its presence and other parameters.
IPv6 Cache
An IPv6 host is required to have a neighbor cache, destination cache, prefix list and default router
list. The NWA maintains and updates its IPv6 caches constantly using the information from
response messages. In IPv6, the NWA configures a link-local address automatically, and then sends
a neighbor solicitation message to check if the address is unique. If there is an address to be
resolved or verified, the NWA also sends out a neighbor solicitation message. When the NWA
receives a neighbor advertisement in response, it stores the neighbor’s link-layer address in the
neighbor cache. When the NWA uses a router solicitation message to query for a router and
receives a router advertisement message, it adds the router’s information to the neighbor cache,
prefix list and destination cache. The NWA creates an entry in the default router list cache if the
router can be used as a default router.
When the NWA needs to send a packet, it first consults the destination cache to determine the next
hop. If there is no matching entry in the destination cache, the NWA uses the prefix list to
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Appendix D IPv6
determine whether the destination address is on-link and can be reached directly without passing
through a router. If the address is onlink, the address is considered as the next hop. Otherwise, the
NWA determines the next-hop from the default router list or routing table. Once the next hop IP
address is known, the NWA looks into the neighbor cache to get the link-layer address and sends
the packet when the neighbor is reachable. If the NWA cannot find an entry in the neighbor cache
or the state for the neighbor is not reachable, it starts the address resolution process. This helps
reduce the number of IPv6 solicitation and advertisement messages.
Multicast Listener Discovery
The Multicast Listener Discovery (MLD) protocol (defined in RFC 2710) is derived from IPv4's
Internet Group Management Protocol version 2 (IGMPv2). MLD uses ICMPv6 message types, rather
than IGMP message types. MLDv1 is equivalent to IGMPv2 and MLDv2 is equivalent to IGMPv3.
MLD allows an IPv6 switch or router to discover the presence of MLD listeners who wish to receive
multicast packets and the IP addresses of multicast groups the hosts want to join on its network.
MLD snooping and MLD proxy are analogous to IGMP snooping and IGMP proxy in IPv4.
MLD filtering controls which multicast groups a port can join.
MLD Messages
A multicast router or switch periodically sends general queries to MLD hosts to update the multicast
forwarding table. When an MLD host wants to join a multicast group, it sends an MLD Report
message for that address.
An MLD Done message is equivalent to an IGMP Leave message. When an MLD host wants to leave
a multicast group, it can send a Done message to the router or switch. The router or switch then
sends a group-specific query to the port on which the Done message is received to determine if
other devices connected to this port should remain in the group.
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Appendix D IPv6
Example - Enabling IPv6 on Windows XP/2003/Vista
By default, Windows XP and Windows 2003 support IPv6. This example shows you how to use the
ipv6 install command on Windows XP/2003 to enable IPv6. This also displays how to use the
ipconfig command to see auto-generated IP addresses.
C:\>ipv6 install
Installing...
Succeeded.
C:\>ipconfig
Windows IP Configuration
Ethernet adapter Local Area Connection:
Connection-specific
IP Address. . . . .
Subnet Mask . . . .
IP Address. . . . .
Default Gateway . .
DNS
. .
. .
. .
. .
Suffix
. . . .
. . . .
. . . .
. . . .
10.1.1.46
255.255.255.0
fe80::2d0:59ff:feb8:103c%4
10.1.1.254
IPv6 is installed and enabled by default in Windows Vista. Use the ipconfig command to check
your automatic configured IPv6 address as well. You should see at least one IPv6 address available
for the interface on your computer.
Example - Enabling DHCPv6 on Windows XP
Windows XP does not support DHCPv6. If your network uses DHCPv6 for IP address assignment,
you have to additionally install a DHCPv6 client software on your Windows XP. (Note: If you use
static IP addresses or Router Advertisement for IPv6 address assignment in your network, ignore
this section.)
This example uses Dibbler as the DHCPv6 client. To enable DHCPv6 client on your computer:
Install Dibbler and select the DHCPv6 client option on your computer.
After the installation is complete, select Start > All Programs > Dibbler-DHCPv6 > Client
Install as service.
Select Start > Control Panel > Administrative Tools > Services.
Double click Dibbler - a DHCPv6 client.
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Click Start and then OK.
Now your computer can obtain an IPv6 address from a DHCPv6 server.
Example - Enabling IPv6 on Windows 7
Windows 7 supports IPv6 by default. DHCPv6 is also enabled when you enable IPv6 on a Windows 7
computer.
To enable IPv6 in Windows 7:
176
Select Control Panel > Network and Sharing Center > Local Area Connection.
Select the Internet Protocol Version 6 (TCP/IPv6) checkbox to enable it.
Click OK to save the change.
NWA1000 Series User’s Guide
Appendix D IPv6
Click Close to exit the Local Area Connection Status screen.
Select Start > All Programs > Accessories > Command Prompt.
Use the ipconfig command to check your dynamic IPv6 address. This example shows a global
address (2001:b021:2d::1000) obtained from a DHCP server.
C:\>ipconfig
Windows IP Configuration
Ethernet adapter Local Area Connection:
Connection-specific DNS
IPv6 Address. . . . . .
Link-local IPv6 Address
IPv4 Address. . . . . .
Subnet Mask . . . . . .
Default Gateway . . . .
NWA1000 Series User’s Guide
Suffix
. . . .
. . . .
. . . .
. . . .
. . . .
2001:b021:2d::1000
fe80::25d8:dcab:c80a:5189%11
172.16.100.61
255.255.255.0
fe80::213:49ff:feaa:7125%11
172.16.100.254
177
A PPENDIX
Wireless LANs
Wireless LAN Topologies
This section discusses ad-hoc and infrastructure wireless LAN topologies.
Ad-hoc Wireless LAN Configuration
The simplest WLAN configuration is an independent (Ad-hoc) WLAN that connects a set of
computers with wireless adapters (A, B, C). Any time two or more wireless adapters are within
range of each other, they can set up an independent network, which is commonly referred to as an
ad-hoc network or Independent Basic Service Set (IBSS). The following diagram shows an example
of notebook computers using wireless adapters to form an ad-hoc wireless LAN.
Figure 89 Peer-to-Peer Communication in an Ad-hoc Network
BSS
A Basic Service Set (BSS) exists when all communications between wireless clients or between a
wireless client and a wired network client go through one access point (AP).
Intra-BSS traffic is traffic between wireless clients in the BSS. When Intra-BSS is enabled, wireless
client A and B can access the wired network and communicate with each other. When Intra-BSS is
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Appendix E Wireless LANs
disabled, wireless client A and B can still access the wired network but cannot communicate with
each other.
Figure 90 Basic Service Set
ESS
An Extended Service Set (ESS) consists of a series of overlapping BSSs, each containing an access
point, with each access point connected together by a wired network. This wired connection
between APs is called a Distribution System (DS).
This type of wireless LAN topology is called an Infrastructure WLAN. The Access Points not only
provide communication with the wired network but also mediate wireless network traffic in the
immediate neighborhood.
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Appendix E Wireless LANs
An ESSID (ESS IDentification) uniquely identifies each ESS. All access points and their associated
wireless clients within the same ESS must have the same ESSID in order to communicate.
Figure 91 Infrastructure WLAN
Channel
A channel is the radio frequency(ies) used by wireless devices to transmit and receive data.
Channels available depend on your geographical area. You may have a choice of channels (for your
region) so you should use a channel different from an adjacent AP (access point) to reduce
interference. Interference occurs when radio signals from different access points overlap causing
interference and degrading performance.
Adjacent channels partially overlap however. To avoid interference due to overlap, your AP should
be on a channel at least five channels away from a channel that an adjacent AP is using. For
example, if your region has 11 channels and an adjacent AP is using channel 1, then you need to
select a channel between 6 or 11.
RTS/CTS
A hidden node occurs when two stations are within range of the same access point, but are not
within range of each other. The following figure illustrates a hidden node. Both stations (STA) are
within range of the access point (AP) or wireless gateway, but out-of-range of each other, so they
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cannot "hear" each other, that is they do not know if the channel is currently being used. Therefore,
they are considered hidden from each other.
Figure 92
RTS/CTS
When station A sends data to the AP, it might not know that the station B is already using the
channel. If these two stations send data at the same time, collisions may occur when both sets of
data arrive at the AP at the same time, resulting in a loss of messages for both stations.
RTS/CTS is designed to prevent collisions due to hidden nodes. An RTS/CTS defines the biggest
size data frame you can send before an RTS (Request To Send)/CTS (Clear to Send) handshake is
invoked.
When a data frame exceeds the RTS/CTS value you set (between 0 to 2432 bytes), the station
that wants to transmit this frame must first send an RTS (Request To Send) message to the AP for
permission to send it. The AP then responds with a CTS (Clear to Send) message to all other
stations within its range to notify them to defer their transmission. It also reserves and confirms
with the requesting station the time frame for the requested transmission.
Stations can send frames smaller than the specified RTS/CTS directly to the AP without the RTS
(Request To Send)/CTS (Clear to Send) handshake.
You should only configure RTS/CTS if the possibility of hidden nodes exists on your network and
the "cost" of resending large frames is more than the extra network overhead involved in the RTS
(Request To Send)/CTS (Clear to Send) handshake.
Note: Enabling the RTS Threshold causes redundant network overhead that could
negatively affect the throughput performance instead of providing a remedy.
Preamble Type
Preamble is used to signal that data is coming to the receiver. Short and long refer to the length of
the synchronization field in a packet.
Short preamble increases performance as less time sending preamble means more time for sending
data. All IEEE 802.11 compliant wireless adapters support long preamble, but not all support short
preamble.
Use long preamble if you are unsure what preamble mode other wireless devices on the network
support, and to provide more reliable communications in busy wireless networks.
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Appendix E Wireless LANs
Use short preamble if you are sure all wireless devices on the network support it, and to provide
more efficient communications.
Use the dynamic setting to automatically use short preamble when all wireless devices on the
network support it, otherwise the NWA uses long preamble.
Note: The wireless devices MUST use the same preamble mode in order to communicate.
Wireless LAN Standards
The IEEE 802.11b wireless access standard was first published in 1999. IEEE 802.11b has a
maximum data rate of 11 Mbps and uses the 2.4 GHz band.
IEEE 802.11g also works in the 2.4 GHz band and is fully compatible with the IEEE 802.11b
standard. This means an IEEE 802.11b adapter can interface directly with an IEEE 802.11g access
point (and vice versa) at 11 Mbps or lower depending on range. IEEE 802.11g has several
intermediate rate steps between the maximum and minimum data rates (54 Mbps and 1 Mbps
respectively).
IEEE 802.11a has a data rate of up to 54 Mbps using the 5 GHz band. IEEE 802.11a is not
interoperable with IEEE 802.11b or IEEE 802.11g.
IEEE 802.11n can operate both in the 2.4 GHz and 5 GHz bands and is backward compatible with
the IEEE 802.11a, IEEE 802.11b, and IEEE 802.11g standards. It improves network throughput and
increases the maximum raw data rate from 54 Mbps to 300 Mbps by using multiple-input multipleoutput (MIMO), a channel width of 40 MHz, frame aggregation and short guard interval.
Table 55 Wireless LAN Standards Comparison Table
WIRELESS LAN
STANDARD
MAXIMUM NET
DATA RATE
FREQUENCY
BAND
COMPATIBILITY
IEEE 802.11b
11 Mbps
2.4 GHz
IEEE 802.11g
IEEE 802.11n
IEEE 802.11g
54 Mbps
2.4 GHz
IEEE 802.11b
IEEE 802.11n
IEEE 802.11a
54 Mbps
5 GHz
IEEE 802.11n
IEEE 802.11n
300 Mbps
2.4 GHz, 5 GHz
IEEE 802.11b
IEEE 802.11g
IEEE 802.11a
Wireless Security Overview
Wireless security is vital to your network to protect wireless communication between wireless
clients, access points and the wired network.
Wireless security methods available on the NWA are data encryption, wireless client authentication,
restricting access by device MAC address and hiding the NWA identity.
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Appendix E Wireless LANs
The following figure shows the relative effectiveness of these wireless security methods available on
your NWA.
Table 56 Wireless Security Levels
SECURITY
LEVEL
Least
Secure
SECURITY TYPE
Unique SSID (Default)
Unique SSID with Hide SSID Enabled
MAC Address Filtering
WEP Encryption
IEEE802.1x EAP with RADIUS Server Authentication
Most Secure
WPA2
Note: You must enable the same wireless security settings on the NWA and on all wireless
clients that you want to associate with it.
IEEE 802.1x
In June 2001, the IEEE 802.1x standard was designed to extend the features of IEEE 802.11 to
support extended authentication as well as providing additional accounting and control features. It
is supported by Windows XP and a number of network devices. Some advantages of IEEE 802.1x
are:
• User based identification that allows for roaming.
• Support for RADIUS (Remote Authentication Dial In User Service, RFC 2138, 2139) for
centralized user profile and accounting management on a network RADIUS server.
• Support for EAP (Extensible Authentication Protocol, RFC 2486) that allows additional
authentication methods to be deployed with no changes to the access point or the wireless
clients.
RADIUS
RADIUS is based on a client-server model that supports authentication, authorization and
accounting. The access point 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 AP acts as a message relay between the
wireless client and the network RADIUS server.
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Appendix E Wireless LANs
Types of RADIUS Messages
The following types of RADIUS messages are exchanged between the access point and the RADIUS
server for user authentication:
• Access-Request
Sent by an access point 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 access point
sends a proper response from the user and then sends another Access-Request message.
The following types of RADIUS messages are exchanged between the access point and the RADIUS
server for user accounting:
• Accounting-Request
Sent by the access point 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 the network. In addition to the
shared key, password information exchanged is also encrypted to protect the network from
unauthorized access.
Types of EAP Authentication
This section discusses some popular authentication types: EAP-MD5, EAP-TLS, EAP-TTLS, PEAP and
LEAP. Your wireless LAN device may not support all authentication types.
EAP (Extensible Authentication Protocol) is an authentication protocol that runs on top of the IEEE
802.1x transport mechanism in order to support multiple types of user authentication. By using EAP
to interact with an EAP-compatible RADIUS server, an access point helps a wireless station and a
RADIUS server perform authentication.
The type of authentication you use depends on the RADIUS server and an intermediary AP(s) that
supports IEEE 802.1x.
For EAP-TLS authentication type, you must first have a wired connection to the network and obtain
the certificate(s) from a certificate authority (CA). A certificate (also called digital IDs) can be used
to authenticate users and a CA issues certificates and guarantees the identity of each certificate
owner.
EAP-MD5 (Message-Digest Algorithm 5)
MD5 authentication is the simplest one-way authentication method. The authentication server
sends a challenge to the wireless client. The wireless client ‘proves’ that it knows the password by
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Appendix E Wireless LANs
encrypting the password with the challenge and sends back the information. Password is not sent in
plain text.
However, MD5 authentication has some weaknesses. Since the authentication server needs to get
the plaintext passwords, the passwords must be stored. Thus someone other than the
authentication server may access the password file. In addition, it is possible to impersonate an
authentication server as MD5 authentication method does not perform mutual authentication.
Finally, MD5 authentication method does not support data encryption with dynamic session key. You
must configure WEP encryption keys for data encryption.
EAP-TLS (Transport Layer Security)
With EAP-TLS, digital certifications are needed by both the server and the wireless clients for
mutual authentication. The server presents a certificate to the client. After validating the identity of
the server, the client sends a different certificate to the server. The exchange of certificates is done
in the open before a secured tunnel is created. This makes user identity vulnerable to passive
attacks. A digital certificate is an electronic ID card that authenticates the sender’s identity.
However, to implement EAP-TLS, you need a Certificate Authority (CA) to handle certificates, which
imposes a management overhead.
EAP-TTLS (Tunneled Transport Layer Service)
EAP-TTLS is an extension of the EAP-TLS authentication that uses certificates for only the serverside authentications to establish a secure connection. 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.
PEAP (Protected EAP)
Like EAP-TTLS, server-side certificate authentication is used to establish a secure connection, then
use simple username and password methods through the secured connection to authenticate the
clients, thus hiding client identity. However, PEAP only supports EAP methods, such as EAP-MD5,
EAP-MSCHAPv2 and EAP-GTC (EAP-Generic Token Card), for client authentication. EAP-GTC is
implemented only by Cisco.
LEAP
LEAP (Lightweight Extensible Authentication Protocol) is a Cisco implementation of IEEE 802.1x.
Dynamic WEP Key Exchange
The AP maps a unique key that is generated with the RADIUS server. This key expires when the
wireless connection times out, disconnects or reauthentication times out. A new WEP key is
generated each time reauthentication is performed.
If this feature is enabled, it is not necessary to configure a default encryption key in the wireless
security configuration screen. You may still configure and store keys, but they will not be used while
dynamic WEP is enabled.
Note: EAP-MD5 cannot be used with Dynamic WEP Key Exchange
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Appendix E Wireless LANs
For added security, certificate-based authentications (EAP-TLS, EAP-TTLS and PEAP) use dynamic
keys for data encryption. They are often deployed in corporate environments, but for public
deployment, a simple user name and password pair is more practical. The following table is a
comparison of the features of authentication types.
Table 57 Comparison of EAP Authentication Types
EAP-MD5
EAP-TLS
EAP-TTLS
PEAP
LEAP
Mutual Authentication
No
Yes
Yes
Yes
Yes
Certificate – Client
No
Yes
Optional
Optional
No
Certificate – Server
No
Yes
Yes
Yes
No
Dynamic Key Exchange
No
Yes
Yes
Yes
Yes
Credential Integrity
None
Strong
Strong
Strong
Moderate
Deployment Difficulty
Easy
Hard
Moderate
Moderate
Moderate
Client Identity Protection
No
No
Yes
Yes
No
WPA2
WPA2 (IEEE 802.11i) is a wireless security standard that defines stronger encryption,
authentication and key management.
Key differences between WPA2 and WEP are improved data encryption and user authentication.
If both an AP and the wireless clients support WPA2 and you have an external RADIUS server, use
WPA2 for stronger data encryption. If you don't have an external RADIUS server, you should use
WPA2-PSK (WPA2-Pre-Shared Key) that only requires a single (identical) password entered into
each access point, wireless gateway and wireless client. As long as the passwords match, a wireless
client will be granted access to a WLAN.
Select WEP only when the AP and/or wireless clients do not support WPA2. WEP is less secure than
WPA2.
Encryption
WPA2 uses TKIP when required for compatibility reasons, but offers stronger encryption than TKIP
with Advanced Encryption Standard (AES) in the Counter mode with Cipher block chaining Message
authentication code Protocol (CCMP).
TKIP uses 128-bit keys that are dynamically generated and distributed by the authentication server.
AES (Advanced Encryption Standard) is a block cipher that uses a 256-bit mathematical algorithm
called Rijndael. They both include a per-packet key mixing function, a Message Integrity Check
(MIC) named Michael, an extended initialization vector (IV) with sequencing rules, and a re-keying
mechanism.
WPA2 regularly change and rotate the encryption keys so that the same encryption key is never
used twice.
The RADIUS server distributes a Pairwise Master Key (PMK) key to the AP that then sets up a key
hierarchy and management system, using the PMK to dynamically generate unique data encryption
keys to encrypt every data packet that is wirelessly communicated between the AP and the wireless
clients. This all happens in the background automatically.
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The Message Integrity Check (MIC) is designed to prevent an attacker from capturing data packets,
altering them and resending them. The MIC provides a strong mathematical function in which the
receiver and the transmitter each compute and then compare the MIC. If they do not match, it is
assumed that the data has been tampered with and the packet is dropped.
By generating unique data encryption keys for every data packet and by creating an integrity
checking mechanism (MIC), with TKIP and AES it is more difficult to decrypt data on a Wi-Fi
network than WEP and difficult for an intruder to break into the network.
The encryption mechanisms used for WPA2 and WPA2-PSK are the same. The only difference
between the two is that WPA2-PSK uses a simple common password, instead of user-specific
credentials. The common-password approach makes WPA2-PSK susceptible to brute-force
password-guessing attacks but it’s still an improvement over WEP as it employs a consistent,
single, alphanumeric password to derive a PMK which is used to generate unique temporal
encryption keys. This prevent all wireless devices sharing the same encryption keys. (a weakness of
WEP)
User Authentication
WPA2 apply IEEE 802.1x and Extensible Authentication Protocol (EAP) to authenticate wireless
clients using an external RADIUS database. WPA2 reduces the number of key exchange messages
from six to four (CCMP 4-way handshake) and shortens the time required to connect to a network.
These two features are optional and may not be supported in all wireless devices.
Key caching allows a wireless client to store the PMK it derived through a successful authentication
with an AP. The wireless client uses the PMK when it tries to connect to the same AP and does not
need to go with the authentication process again.
Pre-authentication enables fast roaming by allowing the wireless client (already connecting to an
AP) to perform IEEE 802.1x authentication with another AP before connecting to it.
Wireless Client WPA2 Supplicants
A wireless client supplicant is the software that runs on an operating system instructing the wireless
client how to use WPA2. At the time of writing, the most widely available supplicant is the WPA2
patch for Windows XP, Funk Software's Odyssey client.
The Windows XP patch is a free download that adds WPA2 capability to Windows XP's built-in "Zero
Configuration" wireless client. However, you must run Windows XP to use it.
WPA2 with RADIUS Application Example
To set up WPA2, you need the IP address of the RADIUS server, its port number (default is 1812),
and the RADIUS shared secret. A WPA2 application example with an external RADIUS server looks
as follows. "A" is the RADIUS server. "DS" is the distribution system.
The AP passes the wireless client's authentication request to the RADIUS server.
The RADIUS server then checks the user's identification against its database and grants or denies
network access accordingly.
A 256-bit Pairwise Master Key (PMK) is derived from the authentication process by the RADIUS
server and the client.
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Appendix E Wireless LANs
The RADIUS server distributes the PMK to the AP. The AP then sets up a key hierarchy and
management system, using the PMK to dynamically generate unique data encryption keys. The
keys are used to encrypt every data packet that is wirelessly communicated between the AP and
the wireless clients.
Figure 93 WPA2 with RADIUS Application Example
WPA2-PSK Application Example
A WPA2-PSK application looks as follows.
188
First enter identical passwords into the AP and all wireless clients. The Pre-Shared Key (PSK) must
consist of between 8 and 63 ASCII characters or 64 hexadecimal characters (including spaces and
symbols).
The AP checks each wireless client's password and allows it to join the network only if the password
matches.
The AP and wireless clients generate a common PMK (Pairwise Master Key). The key itself is not
sent over the network, but is derived from the PSK and the SSID.
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Appendix E Wireless LANs
The AP and wireless clients use the TKIP or AES encryption process, the PMK and information
exchanged in a handshake to create temporal encryption keys. They use these keys to encrypt data
exchanged between them.
Figure 94 WPA2-PSK Authentication
Security Parameters Summary
Refer to this table to see what other security parameters you should configure for each
authentication method or key management protocol type. MAC address filters are not dependent on
how you configure these security features.
Table 58 Wireless Security Relational Matrix
AUTHENTICATION
ENCRYPTIO
METHOD/ KEY
MANAGEMENT PROTOCOL N METHOD
ENTER
MANUAL KEY
IEEE 802.1X
Open
No
Disable
None
Enable without Dynamic WEP Key
Open
Shared
WEP
WEP
No
Enable with Dynamic WEP Key
Yes
Enable without Dynamic WEP Key
Yes
Disable
No
Enable with Dynamic WEP Key
Yes
Enable without Dynamic WEP Key
Yes
Disable
WPA2
TKIP/AES
No
Enable
WPA2-PSK
TKIP/AES
Yes
Disable
Antenna Overview
An antenna couples RF signals onto air. A transmitter within a wireless device sends an RF signal to
the antenna, which propagates the signal through the air. The antenna also operates in reverse by
capturing RF signals from the air.
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Appendix E Wireless LANs
Positioning the antennas properly increases the range and coverage area of a wireless LAN.
Antenna Characteristics
Frequency
An antenna in the frequency of 2.4GHz or 5GHz is needed to communicate efficiently in a wireless
LAN
Radiation Pattern
A radiation pattern is a diagram that allows you to visualize the shape of the antenna’s coverage
area.
Antenna Gain
Antenna gain, measured in dB (decibel), is the increase in coverage within the RF beam width.
Higher antenna gain improves the range of the signal for better communications.
For an indoor site, each 1 dB increase in antenna gain results in a range increase of approximately
2.5%. For an unobstructed outdoor site, each 1dB increase in gain results in a range increase of
approximately 5%. Actual results may vary depending on the network environment.
Antenna gain is sometimes specified in dBi, which is how much the antenna increases the signal
power compared to using an isotropic antenna. An isotropic antenna is a theoretical perfect antenna
that sends out radio signals equally well in all directions. dBi represents the true gain that the
antenna provides.
Types of Antennas for WLAN
There are two types of antennas used for wireless LAN applications.
• Omni-directional antennas send the RF signal out in all directions on a horizontal plane. The
coverage area is torus-shaped (like a donut) which makes these antennas ideal for a room
environment. With a wide coverage area, it is possible to make circular overlapping coverage
areas with multiple access points.
• Directional antennas concentrate the RF signal in a beam, like a flashlight does with the light
from its bulb. The angle of the beam determines the width of the coverage pattern. Angles
typically range from 20 degrees (very directional) to 120 degrees (less directional). Directional
antennas are ideal for hallways and outdoor point-to-point applications.
Positioning Antennas
In general, antennas should be mounted as high as practically possible and free of obstructions. In
point-to–point application, position both antennas at the same height and in a direct line of sight to
each other to attain the best performance.
For omni-directional antennas mounted on a table, desk, and so on, point the antenna up. For
omni-directional antennas mounted on a wall or ceiling, point the antenna down. For a single AP
application, place omni-directional antennas as close to the center of the coverage area as possible.
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For directional antennas, point the antenna in the direction of the desired coverage area.
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Index
Bridge Mode 61
BSS 52
Channel 53
ESS 52
Intra-BSS Traffic 84
Operating Mode 52
Preamble 84
Roaming 85
RTS/CTS Threshold 84
SSID 52
Wireless Client Mode 64
Wireless Mode 53
WMM QoS 84
User Authentication 54
Virtual Local Area Network 89
VLAN 89
introduction 89
VoIP 11, 72
WLAN
interference 180
security parameters 189
WMM 72
warranty 199
note 199
WMM QoS 84
WEP 54
WPA2 54, 186
key caching 187
pre-authentication 187
user authentication 187
vs WPA2-PSK 187
wireless client supplicant 187
with RADIUS application example 187
WEP key encrypting 86
WPA2-MIX 54
Wi-Fi Multimedia QoS 85
WPA2-Pre-Shared Key 186
Wired Equivalent Privacy 54
WPA2-PSK 186
application example 188
WDS 13
Web Configurator 18
password 19
requirements 18
supported browsers 18
Wireless Client 41
wireless client WPA2 supplicants 187
WPA2-PSK-MIX 54
Wireless Distribution System (WDS) 13
Wireless Mode 53
Wireless Mode, Choosing the
Access Point 28
Bridge 28
Wireless Client 28
Wireless Security 15
how to improve 15
Levels 54
wireless security 11, 182
Wireless Security Screen
WEP 74
WPA2-PSK, WPA2-PSK-MIX 77
ZyXEL Device
Ethernet parameters 87
good habits 15
Introduction 9
managing 14
resetting 20, 116
Security Features 15
Wireless Settings Screen 51
Access Point Mode 57
Antenna 85
AP + Bridge Mode 64
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Author                          : ZT01948

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