ZyXEL Communications NBG4104 Wireless N-lite Managed Router User Manual V 2
ZyXEL Communications Corporation Wireless N-lite Managed Router V 2
User manual V.2
| Download: |  |
| Mirror Download [FCC.gov] | |
| Document ID | 1621838 |
| Application ID | oWN+5SrId00HSt0o8Is3Lw== |
| Document Description | User manual V.2 |
| Short Term Confidential | No |
| Permanent Confidential | No |
| Supercede | No |
| Document Type | User Manual |
| Display Format | Adobe Acrobat PDF - pdf |
| Filesize | 476.03kB (5950339 bits) |
| Date Submitted | 2012-01-16 00:00:00 |
| Date Available | 2012-01-17 00:00:00 |
| Creation Date | 2011-11-15 13:25:13 |
| Producing Software | Acrobat Distiller 9.4.6 (Windows) |
| Document Lastmod | 2012-01-17 09:13:03 |
| Document Title | User manual V.2 |
| Document Creator | FrameMaker 9.0 |
NBG4104
Wireless N-lite Managed Router
Default Login Details
IP Address
http://192.168.1.1
User Name
admin
Password
1234
Firmware
Version 1.0
www.zyxel.com
Edition 1, 11/2011
www.zyxel.com
Copyright © 2011
ZyXEL Communications Corporation
About This User's Guide
About This User's Guide
Intended Audience
This manual is intended for people who want to configure the NBG4104 using the Web Configurator.
Tips for Reading User’s Guides On-Screen
When reading a ZyXEL User’s Guide On-Screen, keep the following in mind:
• If you don’t already have the latest version of Adobe Reader, you can download it from http://
www.adobe.com.
• Use the PDF’s bookmarks to quickly navigate to the areas that interest you. Adobe Reader’s
bookmarks pane opens by default in all ZyXEL User’s Guide PDFs.
• If you know the page number or know vaguely which page-range you want to view, you can
enter a number in the toolbar in Reader, then press [ENTER] to jump directly to that page.
• Type [CTRL]+[F] to open the Adobe Reader search utility and enter a word or phrase. This can
help you quickly pinpoint the information you require. You can also enter text directly into the
toolbar in Reader.
• To quickly move around within a page, press the [SPACE] bar. This turns your cursor into a
“hand” with which you can grab the page and move it around freely on your screen.
• Embedded hyperlinks are actually cross-references to related text. Click them to jump to the
corresponding section of the User’s Guide PDF.
Related Documentation
• Quick Start Guide
The Quick Start Guide is designed to help you get your NBG4104 up and running right away. It
contains information on setting up your network and configuring for Internet access.
• Support Disc
Refer to the included CD for support documents.
NBG4104 User’s Guide
Document Conventions
Document Conventions
Warnings and Notes
These are how warnings and notes are shown in this User’s Guide.
Warnings tell you about things that could harm you or your device.
Note: Notes tell you other important information (for example, other things you may
need to configure or helpful tips) or recommendations.
Syntax Conventions
• The NBG4104 may be referred to as the “NBG4104”, the “device”, the “product” or the “system”
in this User’s Guide.
• Product labels, screen names, field labels and field choices are all in bold font.
• A key stroke is denoted by square brackets and uppercase text, for example, [ENTER] means the
“enter” or “return” key on your keyboard.
• “Enter” means for you to type one or more characters and then press the [ENTER] key. “Select”
or “choose” means for you to use one of the predefined choices.
• A right angle bracket ( > ) within a screen name denotes a mouse click. For example,
Maintenance > Log > Log Setting means you first click Maintenance in the navigation panel,
then the Log sub menu and finally the Log Setting tab to get to that screen.
• Units of measurement may denote the “metric” value or the “scientific” value. For example, “k”
for kilo may denote “1000” or “1024”, “M” for mega may denote “1000000” or “1048576” and so
on.
• “e.g.,” is a shorthand for “for instance”, and “i.e.,” means “that is” or “in other words”.
NBG4104 User’s Guide
Document Conventions
Icons Used in Figures
Figures in this User’s Guide may use the following generic icons. The NBG4104 icon is not an exact
representation of your device.
NBG4104
Computer
Notebook computer
Server
DSLAM
Firewall
Telephone
Switch
Router
Modem
NBG4104 User’s Guide
Safety Warnings
Safety Warnings
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Do NOT use this product near water, for example, in a wet basement or near a swimming pool.
Do NOT expose your device to dampness, dust or corrosive liquids.
Do NOT store things on the device.
Do NOT install, use, or service this device during a thunderstorm. There is a remote risk of electric shock
from lightning.
Connect ONLY suitable accessories to the device.
Do NOT open the device or unit. Opening or removing covers can expose you to dangerous high voltage
points or other risks. ONLY qualified service personnel should service or disassemble this device. Please
contact your vendor for further information.
Make sure to connect the cables to the correct ports.
Place connecting cables carefully so that no one will step on them or stumble over them.
Always disconnect all cables from this device before servicing or disassembling.
Use ONLY an appropriate power adaptor or cord for your device.
Connect the power adaptor or cord to the right supply voltage (for example, 110V AC in North America or
230V AC in Europe).
Do NOT allow anything to rest on the power adaptor or cord and do NOT place the product where anyone can
walk on the power adaptor or cord.
Do NOT use the device if the power adaptor or cord is damaged as it might cause electrocution.
If the power adaptor or cord is damaged, remove it from the power outlet.
Do NOT attempt to repair the power adaptor or cord. Contact your local vendor to order a new one.
Do not use the device outside, and make sure all the connections are indoors. There is a remote risk of
electric shock from lightning.
Do NOT obstruct the device ventilation slots, as insufficient airflow may harm your device.
Antenna Warning! This device meets ETSI and FCC certification requirements when using the included
antenna(s). Only use the included antenna(s).
If you wall mount your device, make sure that no electrical lines, gas or water pipes will be damaged.
Your product is marked with this symbol, which is known as the WEEE mark. WEEE stands for
Waste Electronics and Electrical Equipment. It means that used electrical and electronic
products should not be mixed with general waste. Used electrical and electronic equipment
should be treated separately.
NBG4104 User’s Guide
Contents Overview
Contents Overview
User’s Guide ........................................................................................................................... 15
Introduction ................................................................................................................................17
The WPS Button ........................................................................................................................20
Introducing the Web Configurator ..............................................................................................21
Monitor .......................................................................................................................................25
NBG4104 Modes ........................................................................................................................31
Router Mode ..............................................................................................................................32
Access Point Mode ....................................................................................................................38
Tutorials .....................................................................................................................................45
Technical Reference .............................................................................................................. 53
Wireless LAN .............................................................................................................................55
WAN ...........................................................................................................................................69
LAN ............................................................................................................................................81
DHCP Server .............................................................................................................................85
NAT ............................................................................................................................................89
DDNS .........................................................................................................................................95
Static Route ................................................................................................................................97
VLAN Operation .......................................................................................................................101
Interface Group ........................................................................................................................107
Firewall ..................................................................................................................................... 111
Content Filtering ....................................................................................................................... 117
Remote Management ...............................................................................................................121
Bandwidth Management ..........................................................................................................130
Universal Plug-and-Play (UPnP) ..............................................................................................136
Maintenance .............................................................................................................................143
Troubleshooting .......................................................................................................................151
NBG4104 User’s Guide
Contents Overview
NBG4104 User’s Guide
Table of Contents
Table of Contents
About This User's Guide .......................................................................................................... 3
Document Conventions ........................................................................................................... 4
Safety Warnings........................................................................................................................ 6
Contents Overview .................................................................................................................. 7
Table of Contents ..................................................................................................................... 9
Part I: User’s Guide ................................................................................15
Chapter 1
Introduction............................................................................................................................. 17
1.1 Overview ..............................................................................................................................17
1.2 Applications ..........................................................................................................................17
1.3 Ways to Manage the NBG4104 ...........................................................................................17
1.4 Good Habits for Managing the NBG4104 ............................................................................17
1.5 LEDs ....................................................................................................................................18
Chapter 2
The WPS Button...................................................................................................................... 20
2.1 Overview ..............................................................................................................................20
Chapter 3
Introducing the Web Configurator ........................................................................................ 21
3.1 Overview ..............................................................................................................................21
3.2 Accessing the Web Configurator ..........................................................................................21
3.2.1 Login Screen ..............................................................................................................22
3.2.2 Password Screen .......................................................................................................22
3.3 Resetting the NBG4104 .......................................................................................................23
3.3.1 How to Use the RESET Button ...................................................................................23
Chapter 4
Monitor..................................................................................................................................... 25
4.1 Overview ..............................................................................................................................25
4.2 What You Can Do ................................................................................................................25
4.3 The Log Screen ....................................................................................................................25
4.3.1 View Log .....................................................................................................................26
NBG4104 User’s Guide
Table of Contents
4.3.2 Log Settings ................................................................................................................26
4.4 DHCP Table .........................................................................................................................26
4.5 Packet Statistics ...................................................................................................................28
4.6 WLAN Station Status ............................................................................................................28
Chapter 5
NBG4104 Modes ..................................................................................................................... 31
5.1 Overview ..............................................................................................................................31
5.1.1 Device Modes .............................................................................................................31
Chapter 6
Router Mode............................................................................................................................ 32
6.1 Overview ..............................................................................................................................32
6.2 Router Mode Status Screen .................................................................................................33
6.2.1 Navigation Panel ........................................................................................................35
Chapter 7
Access Point Mode................................................................................................................. 38
7.1 Overview ..............................................................................................................................38
7.2 What You Can Do ................................................................................................................38
7.3 What You Need to Know ......................................................................................................38
7.3.1 Setting your NBG4104 to AP Mode ............................................................................39
7.3.2 Accessing the Web Configurator in Access Point Mode .............................................39
7.3.3 Configuring your WLAN and Maintenance Settings ...................................................39
7.4 AP Mode Status Screen .......................................................................................................40
7.5 LAN Screen ..........................................................................................................................43
Chapter 8
Tutorials ................................................................................................................................... 45
8.1 Overview ..............................................................................................................................45
8.2 Set Up a Wireless Network with WPS ..................................................................................45
8.2.1 Push Button Configuration (PBC) ...............................................................................45
8.2.2 PIN Configuration .......................................................................................................46
8.3 Configure Wireless Security without WPS ...........................................................................47
8.3.1 Configure Your Notebook ...........................................................................................49
8.4 Using Multiple SSIDs on the NBG4104 ................................................................................50
8.4.1 Configuring Security Settings of Multiple SSIDs .........................................................51
Part II: Technical Reference...................................................................53
Chapter 9
Wireless LAN........................................................................................................................... 55
10
NBG4104 User’s Guide
Table of Contents
9.1 Overview ..............................................................................................................................55
9.2 What You Can Do ................................................................................................................55
9.3 What You Should Know .......................................................................................................56
9.4 General Wireless LAN Screen ............................................................................................58
9.5 Wireless Security .................................................................................................................60
9.5.1 No Security .................................................................................................................60
9.5.2 WEP Encryption .........................................................................................................60
9.5.3 WPA-PSK/WPA2-PSK ................................................................................................62
9.6 MAC Filter ............................................................................................................................62
9.7 Wireless LAN Advanced Screen ..........................................................................................63
9.8 Quality of Service (QoS) Screen ..........................................................................................65
9.9 WPS Screen .........................................................................................................................65
9.10 WPS Station Screen ...........................................................................................................66
9.11 Scheduling Screen .............................................................................................................67
Chapter 10
WAN ......................................................................................................................................... 69
10.1 Overview ............................................................................................................................69
10.2 What You Can Do ..............................................................................................................69
10.3 What You Need To Know ...................................................................................................69
10.3.1 Configuring Your Internet Connection .......................................................................70
10.3.2 Multicast ...................................................................................................................71
10.4 Management WAN .............................................................................................................72
10.4.1 Add/Edit Internet Connection ....................................................................................73
10.4.2 Ethernet Encapsulation ............................................................................................73
10.4.3 PPPoE Encapsulation ..............................................................................................75
10.4.4 Bridge Encapsulation ................................................................................................78
10.5 Advanced WAN Screen .....................................................................................................79
Chapter 11
LAN .......................................................................................................................................... 81
11.1 Overview ............................................................................................................................81
11.2 What You Can Do ...............................................................................................................81
11.3 What You Need To Know ....................................................................................................82
11.3.1 IP Pool Setup ............................................................................................................82
11.3.2 LAN TCP/IP ..............................................................................................................82
11.3.3 IP Alias ......................................................................................................................82
11.4 LAN IP Screen ....................................................................................................................83
11.5 IP Alias Screen ...................................................................................................................83
Chapter 12
DHCP Server ........................................................................................................................... 85
12.1 Overview ............................................................................................................................85
NBG4104 User’s Guide
11
Table of Contents
12.2 What You Can Do ..............................................................................................................85
12.3 What You Need To Know ...................................................................................................85
12.4 The DHCP General Screen ................................................................................................86
12.5 The DHCP Advanced Screen ...........................................................................................87
Chapter 13
NAT........................................................................................................................................... 89
13.1 Overview ...........................................................................................................................89
13.2 What You Can Do ..............................................................................................................90
13.3 What You Need To Know ...................................................................................................90
13.4 The NAT General Screen ...................................................................................................92
13.5 The NAT Application Screen .............................................................................................92
Chapter 14
DDNS........................................................................................................................................ 95
14.1 Overview ............................................................................................................................95
14.2 What You Need To Know ...................................................................................................95
14.3 The DDNS General Screen ...............................................................................................96
Chapter 15
Static Route ............................................................................................................................. 97
15.1 Overview ...........................................................................................................................97
15.2 IP Static Route Screen ......................................................................................................98
Chapter 16
VLAN Operation .................................................................................................................... 101
16.1 Overview ..........................................................................................................................101
16.2 What You Can Do ............................................................................................................101
16.3 LAN To WAN Screen ........................................................................................................101
16.3.1 Add/Edit VLAN Rule ...............................................................................................103
16.4 WAN To LAN Screen ........................................................................................................105
Chapter 17
Interface Group ..................................................................................................................... 107
17.1 Overview ..........................................................................................................................107
17.2 The Interface Group Screen .............................................................................................107
17.2.1 Interface Group Configuration ................................................................................108
Chapter 18
Firewall .................................................................................................................................. 111
18.1 Overview
........................................................................................................................ 111
18.2 What You Can Do ............................................................................................................ 111
18.3 What You Need To Know ................................................................................................. 112
12
NBG4104 User’s Guide
Table of Contents
18.4 The Firewall General Screen
......................................................................................... 113
18.5 The Access Control Rule Screen ..................................................................................... 114
18.5.1 Access Control Rule Edit ....................................................................................... 115
18.6 The Services Screen ........................................................................................................ 116
Chapter 19
Content Filtering ................................................................................................................... 117
19.1 Overview .......................................................................................................................... 117
19.2 What You Need To Know ................................................................................................. 117
19.3 Content Filter .................................................................................................................... 118
19.4 Technical Reference ......................................................................................................... 119
19.4.1 Customizing Keyword Blocking URL Checking ...................................................... 119
Chapter 20
Remote Management............................................................................................................ 121
20.1 Overview ..........................................................................................................................121
20.2 What You Need to Know ..................................................................................................121
20.2.1 Remote Management and NAT ..............................................................................121
20.3 What You Can Do ............................................................................................................121
20.4 The WWW Screen
.........................................................................................................122
20.5 The Telnet Screen ............................................................................................................123
20.6 The FTP Screen ...............................................................................................................124
20.7 The SNMP Screen ...........................................................................................................124
20.8 The TR069 Screen ...........................................................................................................127
20.9 The Import CA Screen .....................................................................................................128
Chapter 21
Bandwidth Management....................................................................................................... 130
21.1 Overview ..........................................................................................................................130
21.2 What You Can Do ............................................................................................................130
21.3 What You Need To Know .................................................................................................130
21.4 The Bandwidth MGMT General Screen ...........................................................................131
21.5 The Bandwidth MGMT Advanced Screen ........................................................................132
21.5.1 User Defined Service Rule Configuration ..............................................................134
21.5.2 Services and Port Numbers ....................................................................................135
Chapter 22
Universal Plug-and-Play (UPnP).......................................................................................... 136
22.1 Overview ..........................................................................................................................136
22.2 What You Need to Know ..................................................................................................136
22.2.1 NAT Traversal .........................................................................................................136
22.2.2 Cautions with UPnP ................................................................................................136
22.3 UPnP Screen ...................................................................................................................137
NBG4104 User’s Guide
13
Table of Contents
22.4 Technical Reference .........................................................................................................137
22.4.1 Using UPnP in Windows XP Example ....................................................................137
22.4.2 Web Configurator Easy Access ..............................................................................140
Chapter 23
Maintenance .......................................................................................................................... 143
23.1 Overview ..........................................................................................................................143
23.2 What You Can Do ............................................................................................................143
23.3 General Screen ...............................................................................................................143
23.4 Password Screen .............................................................................................................144
23.5 Time Setting Screen .........................................................................................................145
23.6 Firmware Upgrade Screen ...............................................................................................146
23.7 Configuration Backup/Restore Screen .............................................................................147
23.8 Restart Screen .................................................................................................................148
23.9 System Operation Mode ..................................................................................................149
23.10 Sys OP Mode Screen .....................................................................................................150
Chapter 24
Troubleshooting.................................................................................................................... 151
24.1 Overview ..........................................................................................................................151
24.2 Power, Hardware Connections, and LEDs .......................................................................151
24.3 NBG4104 Access and Login ............................................................................................152
24.4 Internet Access ................................................................................................................154
24.5 Resetting the NBG4104 to Its Factory Defaults ...............................................................155
24.6 Wireless Router/AP Troubleshooting ...............................................................................155
Appendix A Product Specifications ...................................................................................... 159
24.7 Wall-mounting Instructions ...............................................................................................161
Appendix B Pop-up Windows, JavaScript and Java Permissions ....................................... 163
Appendix C IP Addresses and Subnetting........................................................................... 175
Appendix D Setting Up Your Computer’s IP Address .......................................................... 185
Appendix E Wireless LANs.................................................................................................. 213
Appendix F Common Services ............................................................................................ 227
Appendix G Legal Information ............................................................................................. 231
Index ...................................................................................................................................... 241
14
NBG4104 User’s Guide
P ART I
User’s Guide
15
16
C HAPT ER
Introduction
1.1 Overview
This chapter introduces the main features and applications of the NBG4104.
The NBG4104 extends the range of your existing wired network without additional wiring, providing
easy network access to mobile users. You can set up a wireless network with other IEEE 802.11b/g/
n compatible devices.
A range of services such as a firewall and content filtering are also available for secure Internet
computing.
1.2 Applications
Your can create the following networks using the NBG4104:
• Wired. You can connect network devices via the Ethernet ports of the NBG4104 so that they can
communicate with each other and access the Internet.
• Wireless. Wireless clients can connect to the NBG4104 to access network resources.
• WAN. Connect to a broadband modem/router for Internet access.
• WPS. Create an instant network connection with another WPS-compatible device, sharing your
network connection with it.
1.3 Ways to Manage the NBG4104
Use any of the following methods to manage the NBG4104.
• WPS (Wi-Fi Protected Setup). You can use the WPS button or the WPS section of the Web
Configurator to set up a wireless network with your ZyXEL Device.
• Web Configurator. This is recommended for everyday management of the NBG4104 using a
(supported) web browser.
1.4 Good Habits for Managing the NBG4104
Do the following things regularly to make the NBG4104 more secure and to manage the NBG4104
more effectively.
NBG4104 User’s Guide
17
Chapter 1 Introduction
• Change the password. Use a password that’s not easy to guess and that consists of different
types of characters, such as numbers and letters.
• Write down the password and put it in a safe place.
• Back up the configuration (and make sure you know how to restore it). Restoring an earlier
working configuration may be useful if the device becomes unstable or even crashes. If you
forget your password, you will have to reset the NBG4104 to its factory default settings. If you
backed up an earlier configuration file, you would not have to totally re-configure the NBG4104.
You could simply restore your last configuration.
1.5 LEDs
Figure 1 Front Panel
WPS
Power
WLAN
WAN
LAN 1-4
The following table describes the LEDs and the WPS button.
Table 1 Front panel LEDs and WPS button
LED
COLOR
Power
Green
STATUS
On
The NBG4104 is receiving power and functioning properly.
Blinking
The NBG4104 is booting up.
Off
WPS
Green
The NBG4104 is not receiving power.
On
The WPS status is configured.
Blinking
The NBG4104 is negotiating a WPS connection with a wireless
client.
Off
WAN
Green
The WPS function is disabled on the NBG4104.
On
The NBG4104’s WAN connection is ready.
Blinking
The NBG4104 is sending/receiving data through the WAN with a
10/100Mbps transmission rate.
Off
WLAN
Green
Off
18
DESCRIPTION
The WAN connection is not ready, or has failed.
On
The NBG4104 is ready, but is not sending/receiving data
through the wireless LAN.
Blinking
The NBG4104 is sending/receiving data through the wireless
LAN.
The wireless LAN is not ready or has failed.
NBG4104 User’s Guide
Chapter 1 Introduction
Table 1 Front panel LEDs and WPS button (continued)
LED
COLOR
STATUS
DESCRIPTION
LAN 1-4
Green
On
The NBG4104’s LAN connection is ready.
Blinking
The NBG4104 is sending/receiving data through the LAN with a
10/100Mbps transmission rate.
Off
NBG4104 User’s Guide
The LAN connection is not ready, or has failed.
19
C HAPT ER
The WPS Button
2.1 Overview
Your NBG4104 supports WiFi Protected Setup (WPS), which is an easy way to set up a secure
wireless network. WPS is an industry standard specification, defined by the WiFi Alliance.
WPS allows you to quickly set up a wireless network with strong security, without having to
configure security settings manually. Each WPS connection works between two devices. Both
devices must support WPS (check each device’s documentation to make sure).
Depending on the devices you have, you can either press a button (on the device itself, or in its
configuration utility) or enter a PIN (a unique Personal Identification Number that allows one device
to authenticate the other) in each of the two devices. When WPS is activated on a device, it has two
minutes to find another device that also has WPS activated. Then, the two devices connect and set
up a secure network by themselves.
For more information on using WPS, see Section 8.2 on page 45.
NBG4104 User’s Guide
20
C HAPT ER
Introducing the Web Configurator
3.1 Overview
This chapter describes how to access the NBG4104 Web Configurator and provides an overview of
its screens.
The Web Configurator is an HTML-based management interface that allows easy setup and
management of the NBG4104 via Internet browser. Use Internet Explorer 6.0 and later versions,
Mozilla Firefox 3 and later versions, or Safari 2.0 and later versions. The recommended screen
resolution is 1024 by 768 pixels.
In order to use the Web Configurator you need to allow:
• Web browser pop-up windows from your device. Web pop-up blocking is enabled by default in
Windows XP SP (Service Pack) 2.
• JavaScript (enabled by default).
• Java permissions (enabled by default).
Refer to the Troubleshooting chapter (Chapter 24 on page 151) to see how to make sure these
functions are allowed in Internet Explorer.
3.2 Accessing the Web Configurator
Make sure your NBG4104 hardware is properly connected and prepare your computer or computer
network to connect to the NBG4104 (refer to the Quick Start Guide).
Launch your web browser.
Type "http://192.168.1.1" as the website address.
Your computer must be in the same subnet in order to access this website address.
NBG4104 User’s Guide
21
Chapter 3 Introducing the Web Configurator
3.2.1 Login Screen
The Web Configurator initially displays the following login screen.
Figure 2 Login screen
The following table describes the labels in this screen.
Table 2 Login screen
LABEL
DESCRIPTION
User Name
Type “admin” (default) as the user name.
Password
Type “1234” (default) as the password.
Login
Click Login to enter the NBG4104’s web configurator.
3.2.2 Password Screen
You should see a screen asking you to change your password (highly recommended) as shown
next.
Figure 3 Change Password Screen
22
NBG4104 User’s Guide
Chapter 3 Introducing the Web Configurator
The following table describes the labels in this screen.
Table 3 Change Password Screen
LABEL
DESCRIPTION
New Password
Type a new password.
Retype to Confirm
Retype the password for confirmation.
Apply
Click Apply to save your changes back to the NBG4104.
Ignore
Click Ignore if you do not want to change the password this time.
Note: The management session automatically times out when the time period set in the
Administrator Inactivity Timer field expires (default five minutes; go to Chapter
23 on page 143 to change this). Simply log back into the NBG4104 if this happens.
3.3 Resetting the NBG4104
If you forget your password or IP address, or you cannot access the Web Configurator, you will need
to use the RESET button at the back of the NBG4104 to reload the factory-default configuration
file. This means that you will lose all configurations that you had previously saved, the password
will be reset to “1234” and the IP address will be reset to “192.168.1.1”.
3.3.1 How to Use the RESET Button
Make sure the power LED is on.
Press the RESET button for longer than 1 second to restart/reboot the NBG4104.
Press the RESET button for longer than 5 seconds to set the NBG4104 back to its factory-default
configurations.
NBG4104 User’s Guide
23
Chapter 3 Introducing the Web Configurator
24
NBG4104 User’s Guide
C HAPT ER
Monitor
4.1 Overview
This chapter discusses read-only information related to the device state of the NBG4104.
To access the Monitor screens, click
. Click open all to show the complete menu.
You can also click the links in the Summary table of the Status screen to view the bandwidth
consumed, packets sent/received as well as the status of clients connected to the NBG4104.
4.2 What You Can Do
• Use the Log screen to see the logs for the activity on the NBG4104 (Section 4.3 on page 25).
• Use the DHCP Table screen to view information related to your DHCP status (Section 4.4 on
page 26).
• use the Statistics screen to view port statistics and the "system up time" (Section 4.5 on page
28).
• Use the WLAN Station Status screen to view the wireless stations that are currently associated
to the NBG4104 (Section 4.6 on page 28).
4.3 The Log Screen
The Web Configurator allows you to look at all of the NBG4104’s logs in one location.
NBG4104 User’s Guide
25
Chapter 4 Monitor
4.3.1 View Log
Click Monitor > Log to open the View Log screen. You can see the logged messages for the
NBG4104. The log wraps around and deletes the old entries after it fills. Click Clear Logs to delete
all the logs. Click Refresh to renew the log screen.
Figure 4 View Log
4.3.2 Log Settings
Click Monitor > Log to open the Log Settings screen. You can configure syslog settings.
Figure 5 Log Settings
The following table describes the labels in this screen.
Table 4 Monitor > Log > Log Settings
LABEL
DESCRIPTION
Active
Select this to enable syslog logging.
Syslog Server IP
Address
Enter the server name or IP address of the syslog server that logs the selected
categories of logs.
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to begin configuring this screen afresh.
4.4 DHCP Table
DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows individual clients to
obtain TCP/IP configuration at start-up from a server. You can configure the NBG4104’s LAN as a
DHCP server or disable it. When configured as a server, the NBG4104 provides the TCP/IP
26
NBG4104 User’s Guide
Chapter 4 Monitor
configuration for the clients. If DHCP service is disabled, you must have another DHCP server on
that network, or else the computer must be manually configured.
Click the DHCP Table (Details...) hyperlink in the Status screen or Monitor > DHCP Table.
Read-only information here relates to your DHCP status. The DHCP table shows current DHCP client
information (including Host Name, IP Address, and Mac Address) of all network clients using
the NBG4104’s DHCP server.
Figure 6 Summary: DHCP Table
The following table describes the labels in this screen.
Table 5 Summary: DHCP Table
LABEL
DESCRIPTION
This is the index number of the host computer.
IP Address
This field displays the IP address relative to the # field listed above.
Host Name
This field displays the computer host name.
MAC Address
This field shows the MAC address of the computer with the name in the Host Name
field.
Every Ethernet device has a unique MAC (Media Access Control) address which uniquely
identifies a device. The MAC address is assigned at the factory and consists of six pairs
of hexadecimal characters, for example, 00:A0:C5:00:00:02.
Refresh
NBG4104 User’s Guide
Click Refresh to renew the screen.
27
Chapter 4 Monitor
4.5 Packet Statistics
Click the Packet Statistics (Details...) hyperlink in the Status screen or Monitor > Statistics.
Read-only information here includes port statistics and the "system up time". The Poll Interval(s)
field is configurable and is used for refreshing the screen.
Figure 7 Summary: Packet Statistics
The following table describes the labels in this screen.
Table 6 Summary: Packet Statistics
LABEL
DESCRIPTION
Port
This is the NBG4104’s port type.
TxPkts
This is the number of transmitted packets on this port.
RxPkts
This is the number of received packets on this port.
TxBytes
This displays the transmission speed in bytes per second on this port.
RxBytes
This displays the reception speed in bytes per second on this port.
Up Time
This is the total time the NBG4104 has been for each session.
System Up Time
This is the total time the NBG4104 has been on.
Poll Interval(s)
Enter the time interval in seconds for refreshing statistics in this field.
Set Interval
Click this button to apply the new poll interval you entered in the Poll Interval(s)
field.
Stop
Click Stop to stop refreshing statistics.
Refresh
Click Refresh to renew the screen.
4.6 WLAN Station Status
Click the WLAN Station Status (Details...) hyperlink in the Status screen or Monitor > WLAN
Station Status. View the wireless stations that are currently associated to the NBG4104 in the
Association List. Association means that a wireless client (for example, your network or computer
28
NBG4104 User’s Guide
Chapter 4 Monitor
with a wireless network card) has connected successfully to the AP (or wireless router) using the
same SSID, channel and security settings.
Figure 8 Summary: Wireless Association List
The following table describes the labels in this screen.
Table 7 Summary: Wireless Association List
LABEL
DESCRIPTION
This is the index number of an associated wireless station.
MAC Address
This field displays the MAC address of an associated wireless station.
Association Time
This field displays the time a wireless station first associated with the NBG4104’s WLAN
network.
Refresh
Click Refresh to reload the list.
NBG4104 User’s Guide
29
Chapter 4 Monitor
30
NBG4104 User’s Guide
C HAPT ER
NBG4104 Modes
5.1 Overview
This chapter introduces the operating mode of your NBG4104, or simply how the NBG4104 is being
used in the network.
5.1.1 Device Modes
These are the operating mode of the NBG4104:
• Router: This is the default device mode of the NBG4104. Use this mode to connect the local
network to another network, like the Internet. Go to Section 6.2 on page 33 to view the Status
screen in this mode.
• Access Point: Use this mode if you want to extend your network by allowing network devices to
connect to the NBG4104 wirelessly. Go to Section 7.4 on page 40 to view the Status screen in
this mode.
For more information on these modes and to change the mode of your NBG4104, refer to Chapter
23 on page 150.
Note: Choose your Device Mode carefully to avoid having to change it later.
When changing to another mode, the IP address of the NBG4104 changes. The running applications
and services of the network devices connected to the NBG4104 can be interrupted.
NBG4104 User’s Guide
31
C HAPT ER
Router Mode
6.1 Overview
The NBG4104 is set to router mode by default. Routers are used to connect the local network to
another network (for example, the Internet). In the figure below, the NBG4104 connects the local
network (LAN1 ~ LAN4) to the Internet.
Figure 9 NBG4104 Network
Modem
NBG4104 User’s Guide
32
Chapter 6 Router Mode
6.2 Router Mode Status Screen
Click
to open the status screen.
Figure 10 Status Screen: Router Mode
The following table describes the icons shown in the Status screen.
Table 8 Status Screen Icon Key: Router Mode
ICON
DESCRIPTION
Logout
Click this at any time to exit the Web Configurator.
Click this icon to view copyright and a link for related product information.
Select a number of seconds or None from the drop-down list box to refresh all screen statistics
automatically at the end of every time interval or to not refresh the screen statistics.
Click this button to refresh the status screen statistics.
Click this icon to see the Status page. The information in this screen depends on the device
mode you select.
Click this icon to see the Monitor navigation menu.
Click this icon to see the Configuration navigation menu.
Click this icon to see the Maintenance navigation menu.
NBG4104 User’s Guide
33
Chapter 6 Router Mode
The following table describes the labels shown in the Status screen.
Table 9 Status Screen: Router Mode
LABEL
DESCRIPTION
Device Information
Host Name
This is the device’s host name.
Firmware Version
This is the firmware version.
WAN Information
- MAC Address
This shows the WAN Ethernet adapter MAC Address of your device.
- IP Address
This shows the WAN port’s IP address.
- IP Subnet Mask
This shows the WAN port’s subnet mask.
- Mode
This shows the device mode to which the NBG4104 is set.
LAN Information
- MAC Address
This shows the LAN Ethernet adapter MAC Address of your device.
- IP Address
This shows the LAN port’s IP address.
- IP Subnet Mask
This shows the LAN port’s subnet mask.
- DHCP
This shows the LAN port’s DHCP role - Server or Disable.
WLAN Information
- MAC Address
This shows the wireless adapter MAC Address of your device.
- Radio
This shows the current status of the Wireless LAN - ON or OFF.
- Name (SSID)
This shows a descriptive name used to identify the NBG4104 in the wireless LAN.
- Channel
This shows the channel number which you select manually.
- Operating Channel
This shows the channel number which the NBG4104 is currently using over the wireless LAN.
- Security Mode
This shows the level of wireless security the NBG4104 is using.
- 802.11 Mode
This shows the wireless standard.
- WPS
This displays Configured when the WPS has been set up.
This displays Unconfigured if the WPS has not been set up.
Click the status to display Network > Wireless LAN > WPS screen.
System Status
Item
This column shows the type of data the NBG4104 is recording.
Data
This column shows the actual data recorded by the NBG4104.
System Up Time
This is the total time the NBG4104 has been on.
Current Date/Time
This field displays your NBG4104’s present date and time.
System Resource
- CPU Usage
This displays what percentage of the NBG4104’s processing ability is currently used. When
this percentage is close to 100%, the NBG4104 is running at full load, and the throughput is
not going to improve anymore. If you want some applications to have more throughput, you
should turn off other applications (for example, using bandwidth management.)
- Memory Usage
This shows what percentage of the heap memory the NBG4104 is using.
System Setting
- UPnP
This shows whether UPnP is enabled or not.
Interface Status
Interface
34
This displays the NBG4104 port types. The port types are: WAN, LAN and WLAN.
NBG4104 User’s Guide
Chapter 6 Router Mode
Table 9 Status Screen: Router Mode (continued)
LABEL
DESCRIPTION
Status
For the LAN and WAN ports, this field displays Down (line is down) or Up (line is up or
connected).
For the WLAN, it displays Up when the WLAN is enabled or Down when the WLAN is
disabled.
Rate
For the LAN ports, this displays the port speed and duplex setting or N/A when the line is
disconnected.
For the WAN port, it displays the port speed and duplex setting if you’re using Ethernet
encapsulation. This field displays N/A when the line is disconnected.
For the WLAN, it displays the maximum transmission rate when the WLAN is enabled and N/
A when the WLAN is disabled.
Summary
DHCP Table
Click Details... to go to the Monitor > DHCP Table screen (Section 4.4 on page 26). Use
this screen to view current DHCP client information.
Packet Statistics
Click Details... to go to the Monitor > Packet Statistics screen (Section 4.5 on page 28).
Use this screen to view port status and packet specific statistics.
WLAN Station Status
Click Details... to go to the Monitor > WLAN Station Status screen (Section 4.6 on page
28). Use this screen to view the wireless stations that are currently associated to the
NBG4104.
6.2.1 Navigation Panel
Use the sub-menus on the navigation panel to configure NBG4104 features.
Figure 11 Navigation Panel: Router Mode
NBG4104 User’s Guide
35
Chapter 6 Router Mode
The following table describes the sub-menus.
Table 10 Navigation Panel: Router Mode
LINK
TAB
Status
FUNCTION
This screen shows the NBG4104’s general device, system and interface
status information. Use this screen to access the summary statistics tables.
MONITOR
Log
Use this screen to view the list of activities recorded by your NBG4104.
DHCP Table
Use this screen to view current DHCP client information.
Statistics
Use this screen to view port status and packet specific statistics.
WLAN Station
Status
Use this screen to view the wireless stations that are currently associated
to the NBG4104.
CONFIGURATION
Networking
Wireless LAN
WAN
LAN
DHCP Server
NAT
General
Use this screen to configure wireless LAN and the level of wireless security
for the NBG4104.
MAC Filter
Use the MAC filter screen to configure the NBG4104 to block access to
devices or block the devices from accessing the NBG4104.
Advanced
This screen allows you to configure advanced wireless settings.
QoS
Use this screen to enable Wi-Fi Multimedia Quality of Service (WMM QoS).
WMM QoS allows you to prioritize wireless traffic according to the delivery
requirements of individual services.
WPS
Use this screen to configure WPS.
WPS Station
Use this screen to add a wireless station using WPS.
Scheduling
Use this screen to schedule the times the Wireless LAN is enabled.
Management
WAN
This screen allows you to configure ISP parameters, WAN IP address
assignment, DNS servers, the WAN MAC address, and VLAN settings.
Advanced
Use this screen to configure multicast and auto-subnet.
IP
Use this screen to configure LAN IP address and subnet mask.
IP Alias
Use this screen to have the NBG4104 apply IP alias to create LAN subnets.
General
Use this screen to enable the NBG4104’s DHCP server.
Advanced
Use this screen to assign IP addresses to specific individual computers
based on their MAC addresses and to have DNS servers assigned by the
DHCP server.
General
Use this screen to enable NAT.
Application
Use this screen to configure servers behind the NBG4104.
DDNS
General
Use this screen to set up dynamic DNS.
Static Route
IP Static
Route
Use this screen to configure IP static routes.
VLAN
Operation
LAN to WAN
Use this screen to configure QoS rules and actions for LAN to WAN traffic.
WAN to LAN
Use this screen to control the VLAN ID and IEEE 802.1p priority tags of
traffic sent out through individual LAN ports.
Interface
Group
Interface
Group
Use this screen to add a LAN interface or a VLAN ID to a new group.
Security
36
NBG4104 User’s Guide
Chapter 6 Router Mode
Table 10 Navigation Panel: Router Mode (continued)
LINK
TAB
FUNCTION
General
Use this screen to activate/deactivate the firewall and Anti-Dos Attack.
Access
Control Rule
This screen shows a summary of the firewall rules, and allows you to edit/
delete a firewall rule.
Services
Use this screen to configure ICMP setting of the NBG4104.
Content Filter
Use this screen to block sites containing certain keywords in the URL.
WWW
Use this screen to configure through which interface(s) and from which IP
address(es) users can use HTTP or HTTPs to manage the NBG4104.
TELNET
Use this screen to configure through which interface(s) and from which IP
address(es) users can use Telnet to manage the NBG4104.
FTP
Use this screen to configure through which interface(s) and from which IP
address(es) users can use FTP to manage the NBG4104.
SNMP
Use this screen to configure through which interface(s) and from which IP
address(es) users can use SNMP to manage the NBG4104.
TR069
Use this screen to configure the NBG4104’s TR-069 auto-configuration
settings.
Import CA
Use this screen to import CA certificates to the NBG4104.
Bandwidth
MGMT
General
Use this screen to configure a bandwidth management service type.
Advanced
Use this screen to configure bandwidth management for specific types of
applications.
UPnP
General
Use this screen to enable UPnP on the NBG4104.
General
General
Use this screen to view and change administrative settings such as system
and domain names.
Password
Password
Setup
Use this screen to change the password of your NBG4104.
Time
Time Setting
Use this screen to change your NBG4104’s time and date.
Firmware
Upgrade
Firmware
Upgrade
Use this screen to upload firmware to your NBG4104.
Backup/
Restore
Backup/
Restore
Use this screen to backup and restore the configuration or reset the factory
defaults to your NBG4104.
Reset/
Restart
Restart
This screen allows you to reboot the NBG4104 without turning the power
off.
Sys OP Mode
Sys OP Mode
This screen allows you to select whether your device acts as a Router or a
Access Point.
Firewall
Content Filter
Management
Remote
MGMT
MAINTENANCE
NBG4104 User’s Guide
37
C HAPT ER
Access Point Mode
7.1 Overview
Use your NBG4104 as an access point (AP) if you already have a router or gateway on your
network. In this mode your NBG4104 bridges a wired network (LAN) and wireless LAN (WLAN) in
the same subnet. See the figure below for an example.
Figure 12 Wireless Internet Access in Access Point Mode
WLAN
LAN
Many screens that are available in Router mode are not available in Access Point mode, such as
bandwidth management and firewall.
Note: See Chapter 8 on page 45 for an example of setting up a wireless network in
Access Point mode.
7.2 What You Can Do
• Use the Status screen to view read-only information about your NBG4104 (Section 7.4 on page
40).
• Use the LAN screen to set the IP address for your NBG4104 acting as an access point (Section
7.5 on page 43).
7.3 What You Need to Know
See Chapter 8 on page 45 for a tutorial on setting up a network with the NBG4104 as an access
point.
NBG4104 User’s Guide
38
Chapter 7 Access Point Mode
7.3.1 Setting your NBG4104 to AP Mode
Log into the Web Configurator if you haven’t already. See the Quick start Guide for instructions on
how to do this.
To use your NBG4104 as an access point, go to Maintenance > Sys OP Mode > General and
select Access Point mode.
Figure 13 Changing to Access Point mode
Note: You have to log in to the Web Configurator again when you change modes.As soon
as you do, your NBG4104 is already in Access Point mode.
7.3.2 Accessing the Web Configurator in Access Point Mode
Log in to the Web Configurator in Access Point mode, do the following:
Connect your computer to the LAN port of the NBG4104.
The default IP address of the NBG4104 is “192.168.1.2”. In this case, your computer must have an
IP address in the range between “192.168.1.3” and “192.168.1.254”.
Click Start > Run on your computer in Windows. Type “cmd” in the dialog box. Enter “ipconfig” to
show your computer’s IP address. If your computer’s IP address is not in the correct range then see
Appendix D on page 185 for information on changing your computer’s IP address.
After you’ve set your computer’s IP address, open a web browser such as Internet Explorer and
type “192.168.1.2” as the web address in your web browser.
7.3.3 Configuring your WLAN and Maintenance Settings
The configuration of wireless, bandwidth management and maintenance settings in Access Point
mode is the same as for Router Mode.
• See Chapter 9 on page 55 for information on the configuring your wireless network.
• See Chapter 23 on page 143 for information on configuring your Maintenance settings.
NBG4104 User’s Guide
39
Chapter 7 Access Point Mode
7.4 AP Mode Status Screen
Click
to open the Status screen.
Figure 14 Status Screen: Access Point Mode
The following table describes the labels shown in the Status screen.
Table 11 Status Screen: AP Mode
LABEL
DESCRIPTION
Device Information
Host Name
This is the device’s host name.
Firmware Version
This is the firmware version.
WAN Information
- MAC Address
This shows the WAN Ethernet adapter MAC Address of your device.
- IP Address
This shows the WAN port’s IP address.
- IP Subnet Mask
This shows the WAN port’s subnet mask.
- Mode
This shows the device mode to which the NBG4104 is set.
LAN Information
- MAC Address
This shows the LAN Ethernet adapter MAC Address of your device.
- IP Address
This shows the LAN port’s IP address.
- IP Subnet Mask
This shows the LAN port’s subnet mask.
- DHCP
This shows the LAN port’s DHCP role. In AP mode, this field shows None, meaning DHCP is
disabled.
WLAN Information
- MAC Address
This shows the wireless adapter MAC Address of your device.
- Radio
This shows the current status of the Wireless LAN - ON or OFF.
40
NBG4104 User’s Guide
Chapter 7 Access Point Mode
Table 11 Status Screen: AP Mode (continued)
LABEL
DESCRIPTION
- Name (SSID)
This shows a descriptive name used to identify the NBG4104 in the wireless LAN.
- Channel
This shows the channel number which you select manually.
- Operating Channel
This shows the channel number which the NBG4104 is currently using over the wireless LAN.
- Security Mode
This shows the level of wireless security the NBG4104 is using.
- 802.11 Mode
This shows the wireless standard.
- WPS
This displays Configured when the WPS has been set up.
This displays Unconfigured if the WPS has not been set up.
Click the status to display Network > Wireless LAN > WPS screen.
System Status
Item
This column shows the type of data the NBG4104 is recording.
Data
This column shows the actual data recorded by the NBG4104.
System Up Time
This is the total time the NBG4104 has been on.
Current Date/Time
This field displays your NBG4104’s present date and time.
System Resource
- CPU Usage
This displays what percentage of the NBG4104’s processing ability is currently used. When
this percentage is close to 100%, the NBG4104 is running at full load, and the throughput is
not going to improve anymore. If you want some applications to have more throughput, you
should turn off other applications (for example, using bandwidth management.)
- Memory Usage
This shows what percentage of the heap memory the NBG4104 is using.
System Setting
- UPnP
This shows whether UPnP is enabled or not.
Interface Status
Interface
This displays the NBG4104 port types. The port types are: WAN, LAN and WLAN.
Status
For the LAN and WAN ports, this field displays Down (line is down) or Up (line is up or
connected).
For the WLAN, it displays Up when the WLAN is enabled or Down when the WLAN is
disabled.
Rate
For the LAN ports, this displays the port speed and duplex setting or N/A when the line is
disconnected.
For the WAN port, it displays the port speed and duplex setting if you’re using Ethernet
encapsulation. This field displays N/A when the line is disconnected.
For the WLAN, it displays the maximum transmission rate when the WLAN is enabled and N/
A when the WLAN is disabled.
Summary
Packet Statistics
Click Details... to go to the Monitor > Packet Statistics screen (Section 4.5 on page 28).
Use this screen to view port status and packet specific statistics.
WLAN Station Status
Click Details... to go to the Monitor > WLAN Station Status screen (Section 4.6 on page
28). Use this screen to view the wireless stations that are currently associated to the
NBG4104.
NBG4104 User’s Guide
41
Chapter 7 Access Point Mode
7.4.0.1 Navigation Panel
Use the menu in the navigation panel to configure NBG4104 features in Access Point mode.
The following screen and table show the features you can configure in Access Point mode.
Figure 15 Menu: Access Point Mode
The following table describes the sub-menus.
Table 12 Navigation Panel: AP Mode
LINK
TAB
Status
FUNCTION
This screen shows the NBG4104’s general device, system and interface
status information. Use this screen to access the summary statistics tables.
MONITOR
Log
Use this screen to view the list of activities recorded by your NBG4104.
Statistics
Use this screen to view port status and packet specific statistics.
WLAN Station
Status
Use this screen to view the wireless stations that are currently associated
to the NBG4104.
CONFIGURATION
Networking
Wireless LAN
LAN
VLAN
Operation
42
General
Use this screen to configure wireless LAN and the level of wireless security
for the NBG4104.
MAC Filter
Use the MAC filter screen to configure the NBG4104 to block access to
devices or block the devices from accessing the NBG4104.
Advanced
This screen allows you to configure advanced wireless settings.
QoS
Use this screen to enable Wi-Fi Multimedia Quality of Service (WMM QoS).
WMM QoS allows you to prioritize wireless traffic according to the delivery
requirements of individual services.
WPS
Use this screen to configure WPS.
WPS Station
Use this screen to add a wireless station using WPS.
Scheduling
Use this screen to schedule the times the Wireless LAN is enabled.
IP
Use this screen to configure LAN IP address and subnet mask.
IP Alias
Use this screen to have the NBG4104 apply IP alias to create LAN subnets.
LAN to WAN
Use this screen to configure QoS rules and actions for LAN to WAN traffic.
WAN to LAN
Use this screen to control the VLAN ID and IEEE 802.1p priority tags of
traffic sent out through individual LAN ports.
NBG4104 User’s Guide
Chapter 7 Access Point Mode
Table 12 Navigation Panel: AP Mode (continued)
LINK
TAB
FUNCTION
Interface
Group
Use this screen to add a LAN interface or a VLAN ID to a new group.
WWW
Use this screen to configure through which interface(s) and from which IP
address(es) users can use HTTP or HTTPs to manage the NBG4104.
TELNET
Use this screen to configure through which interface(s) and from which IP
address(es) users can use Telnet to manage the NBG4104.
FTP
Use this screen to configure through which interface(s) and from which IP
address(es) users can use FTP to manage the NBG4104.
SNMP
Use this screen to configure through which interface(s) and from which IP
address(es) users can use SNMP to manage the NBG4104.
TR069
Use this screen to configure the NBG4104’s TR-069 auto-configuration
settings.
Import CA
Use this screen to import CA certificates to the NBG4104.
General
General
Use this screen to view and change administrative settings such as system
and domain names.
Password
Password
Setup
Use this screen to change the password of your NBG4104.
Time
Time Setting
Use this screen to change your NBG4104’s time and date.
Firmware
Upgrade
Firmware
Upgrade
Use this screen to upload firmware to your NBG4104.
Backup/
Restore
Backup/
Restore
Use this screen to backup and restore the configuration or reset the factory
defaults to your NBG4104.
Reset/
Restart
Restart
This screen allows you to reboot the NBG4104 without turning the power
off.
Sys OP Mode
Sys OP Mode
This screen allows you to select whether your device acts as a Router or a
Access Point.
Interface
Group
Management
Remote
MGMT
MAINTENANCE
7.5 LAN Screen
Use this section to configure your LAN settings while in Access Point mode.
Click Configuration > Networking > LAN to see the screen below.
Note: If you change the IP address of the NBG4104 in the screen below, you will need to
log into the NBG4104 again using the new IP address.
Figure 16 Configuration > Networking > LAN > IP
NBG4104 User’s Guide
43
Chapter 7 Access Point Mode
The table below describes the labels in the screen.
Table 13 Configuration > Networking > LAN > IP
44
LABEL
DESCRIPTION
IP Address
Type the IP address in dotted decimal notation. The default setting is 192.168.1.2. If
you change the IP address you will have to log in again with the new IP address.
IP Subnet Mask
The subnet mask specifies the network number portion of an IP address. Your NBG4104
will automatically calculate the subnet mask based on the IP address that you assign.
Unless you are implementing subnetting, use the subnet mask computed by the
NBG4104.
Apply
Click Apply to save your changes to the NBG4104.
Reset
Click Reset to reload the previous configuration for this screen.
NBG4104 User’s Guide
C HAPT ER
Tutorials
8.1 Overview
This chapter provides tutorials for setting up your NBG4104.
• Set Up a Wireless Network with WPS
• Configure Wireless Security without WPS
• Using Multiple SSIDs on the NBG4104
8.2 Set Up a Wireless Network with WPS
This section gives you an example of how to set up wireless network using WPS. This example uses
the NBG4104 as the AP and NWD210N as the wireless client which connects to a notebook.
Note: The wireless client must be a WPS-aware device (for example, a WPS USB adapter
or PCI card).
There are two WPS methods for creating a secure connection. This tutorial shows you how to do
both.
• Push Button Configuration (PBC) - create a secure wireless network simply by pressing a
button. See Section 8.2.1 on page 45.This is the easier method.
• PIN Configuration - create a secure wireless network simply by entering a wireless client's PIN
(Personal Identification Number) in the NBG4104’s interface. See Section 8.2.2 on page 46. This
is the more secure method, since one device can authenticate the other.
8.2.1 Push Button Configuration (PBC)
Make sure that your NBG4104 is turned on. Make sure the device is placed within range of your
computer.
Make sure that you have installed the wireless client (this example uses the NWD210N) driver and
utility in your notebook.
In the wireless client utility, find the WPS settings. Enable WPS and press the WPS button (Start or
WPS button)
Log into NBG4104’s Web Configurator and press the Push Button in the Configuration >
Networking > Wireless LAN > WPS Station screen.
NBG4104 User’s Guide
45
Chapter 8 Tutorials
Note: Your NBG4104 has a WPS button located on its back panel, as well as a WPS button
in its configuration utility. Both buttons have exactly the same function; you can
use one or the other.
Note: It doesn’t matter which button is pressed first. You must press the second button
within two minutes of pressing the first one.
The NBG4104 sends the proper configuration settings to the wireless client. This may take up to
two minutes. Then the wireless client is able to communicate with the NBG4104 securely.
The following figure shows you an example to set up wireless network and security by pressing a
button on both NBG4104 and wireless client (the NWD210N in this example).
Figure 17 Example WPS Process: PBC Method
Wireless Client
Access Point
WITHIN 2 MINUTES
SECURITY INFO
COMMUNICATION
8.2.2 PIN Configuration
When you use the PIN configuration method, you need to use both NBG4104’s configuration
interface and the client’s utilities.
46
Launch your wireless client’s configuration utility. Go to the WPS settings and select the PIN method
to get a PIN number.
Enter the PIN number to the PIN field in the Configuration > Networking > Wireless LAN >
WPS Station screen on the NBG4104.
NBG4104 User’s Guide
Chapter 8 Tutorials
Click Start buttons (or button next to the PIN field) on both the wireless client utility screen and the
NBG4104’s WPS Station screen within two minutes.
The NBG4104 authenticates the wireless client and sends the proper configuration settings to the
wireless client. This may take up to two minutes. Then the wireless client is able to communicate
with the NBG4104 securely.
The following figure shows you the example to set up wireless network and security on NBG4104
and wireless client (ex. NWD210N in this example) by using PIN method.
Figure 18 Example WPS Process: PIN Method
Wireless Client
Access Point
WITHIN 2 MINUTES
8.3 Configure Wireless Security without WPS
This example shows you how to configure wireless security settings with the following parameters
on your NBG4104.
SSID
SSID_Example
Channel
Security
WPA-PSK
(Pre-Shared Key: ThisismyWPA-PSKpre-sharedkey)
Follow the steps below to configure the wireless settings on your NBG4104.
NBG4104 User’s Guide
47
Chapter 8 Tutorials
The instructions require that your hardware is connected (see the Quick Start Guide) and you are
logged into the Web Configurator through your LAN connection (see Section 3.2 on page 21).
48
Open the Configuration > Networking > Wireless LAN > General screen in the NBG4104’s
Web Configurator.
In the Wireless Setup section, select the Wireless LAN checkbox.
Enter SSID_Example as the SSID and select Channel-06 as the channel.
Click Apply to save your SSID settings.
In the same screen, go to the Security section and set security mode to WPA-PSK and enter
ThisismyWPA-PSKpre-sharedkey in the Pre-Shared Key field. Click Apply.l
Open the Status screen. Verify your wireless and wireless security settings under Device
Information and check if the WLAN connection is up under Interface Status.
NBG4104 User’s Guide
Chapter 8 Tutorials
8.3.1 Configure Your Notebook
Note: We use the ZyXEL M-302 wireless adapter utility screens as an example for the
wireless client. The screens may vary for different models.
The NBG4104 supports IEEE 802.11b, IEEE 802.11g and IEEE 802.11n wireless clients. Make sure
that your notebook or computer’s wireless adapter supports one of these standards.
Wireless adapters come with software sometimes called a “utility” that you install on your
computer. See your wireless adapter’s User’s Guide for information on how to do that.
After you’ve installed the utility, open it. If you cannot see your utility’s icon on your screen, go to
Start > Programs and click on your utility in the list of programs that appears. The utility displays
a list of APs within range, as shown in the example screen below.
Select SSID_Example3 and click Connect.
Select WPA-PSK and type the security key in the following screen. Click Next.
NBG4104 User’s Guide
49
Chapter 8 Tutorials
The Confirm Save window appears. Check your settings and click Save to continue.
Check the status of your wireless connection in the screen below. If your wireless connection is
weak or you have no connection, see Chapter 24 Troubleshooting section of this User’s Guide.
If your connection is successful, open your Internet browser and enter http://www.zyxel.com or the
URL of any other web site in the address bar. If you are able to access the web site, your wireless
connection is successfully configured.
8.4 Using Multiple SSIDs on the NBG4104
You can configure more than one SSID on a NBG4104 when it is operating in access point or
universal repeater mode. This allows you to configure multiple independent wireless networks on
the NBG4104 as if there were multiple APs (virtual APs). Each virtual AP has its own SSID, wireless
security type and MAC filtering settings. That is, each SSID on the NBG4104 represents a different
access point/wireless network to wireless clients in the network.
Clients can associate only with the SSIDs for which they have the correct security settings. Clients
using different SSIDs can access the Internet and the wired network behind the NBG4104 (such as
a printer). You can allow communication between wireless clients of different SSIDs in the
Configuration > Network > Wireless LAN > General screen. See Section 9.4 on page 58 for
more information.
50
NBG4104 User’s Guide
Chapter 8 Tutorials
For example, you may set up three wireless networks (A, B and C) in your office. A is for workers,
B is for guests and C is specific to a VoIP device in the meeting room.
SSID_Worker
SSID_VoIP
SSID_Guest
8.4.1 Configuring Security Settings of Multiple SSIDs
This example shows you how to configure the SSIDs with the following parameters on your
NBG4104 (in access point mode).
SSID
SECURITY TYPE
KEY
MAC FILTERING
SSID_Worker
WPA2-PSK
DoNotStealMyWirelessNet
work
Disable
WPA Compatible
SSID_Guest
Static WEP 128bit
keyexample123
Disable
SSID_VoIP
WPA-PSK
VoIPOnly12345678
Allow
00:A0:C5:01:23:45
Connect your computer to the LAN port of the NBG4104 using an Ethernet cable.
The default IP address of the NBG4104 is “192.168.1.2”. In this case, your computer must have an
IP address in the range between “192.168.1.3” and “192.168.1.254”.
Click Start > Run on your computer in Windows. Type “cmd” in the dialog box. Enter “ipconfig” to
show your computer’s IP address. If your computer’s IP address is not in the correct range then see
Appendix D on page 185 for information on changing your computer’s IP address.
After you’ve set your computer’s IP address, open a web browser such as Internet Explorer and
type “http://192.168.1.2” as the web address in your web browser.
Enter “1234” (default) as the password and click Login.
Type a new password and retype it to confirm, then click Apply. Otherwise, click Ignore.
NBG4104 User’s Guide
51
Chapter 8 Tutorials
52
Go to Configuration > Networking > Wireless LAN > General. In the Wireless Setup section,
enable and enter the SSIDs as the parameters above. Click Apply to save the SSID settings.
Then go to the Security section to configure security settings for each SSID. Select SSID_Worker
from the SSID drop-down list. Select WPA2-PSK as the Security Mode. Enter the Pass Phrase.
Click Apply. Repeat this step and setup security settings for other SSIDs according to the
parameters above.
Click the MAC Filter tab to configure MAC filtering for the SSID_VoIP wireless network. Select
SSID_VoIP from the SSID drop-down list and select Allow in the Policy field. Enter the VoIP
device’s MAC address in the Add a station Mac Address field and click Apply to allow only the
VoIP device to associate with the NBG4104 using this SSID.
NBG4104 User’s Guide
P ART II
Technical Reference
53
54
C HAPT ER
Wireless LAN
9.1 Overview
This chapter discusses how to configure the wireless network settings in your NBG4104. See the
appendices for more detailed information about wireless networks.
The following figure provides an example of a wireless network.
Figure 19 Example of a Wireless Network
The wireless network is the part in the blue circle. In this wireless network, devices A and B are
called wireless clients. The wireless clients use the access point (AP) to interact with other devices
(such as the printer) or with the Internet. Your NBG4104 is the AP.
9.2 What You Can Do
• Use the General screen to enter the SSID, select the channel, and configure wireless security
(Section 9.4 on page 58).
• Use the MAC Filter screen to allow or deny wireless stations based on their MAC addresses from
connecting to the NBG4104 (Section 9.6 on page 62).
• Use the Advanced screen to allow intra-BSS networking and set the RTS/CTS Threshold (Section
9.7 on page 63).
• Use the QoS screen to ensure Quality of Service (QoS) in your wireless network (Section 9.8 on
page 65).
NBG4104 User’s Guide
55
Chapter 9 Wireless LAN
• Use the WPS screen to quickly set up a wireless network with strong security, without having to
configure security settings manually (Section 9.9 on page 65).
• Use the WPS Station screen to add a wireless station using WPS (Section 9.10 on page 66).
• Use the Scheduling screen to set the times your wireless LAN is turned on and off (Section 9.11
on page 67).
9.3 What You Should Know
Every wireless network must follow these basic guidelines.
• Every wireless client in the same wireless network must use the same SSID.
The SSID is the name of the wireless network. It stands for Service Set IDentity.
• If two wireless networks overlap, they should use different channels.
Like radio stations or television channels, each wireless network uses a specific channel, or
frequency, to send and receive information.
• Every wireless client in the same wireless network must use security compatible with the AP.
Security stops unauthorized devices from using the wireless network. It can also protect the
information that is sent in the wireless network.
Wireless Security Overview
The following sections introduce different types of wireless security you can set up in the wireless
network.
SSID
Normally, the AP acts like a beacon and regularly broadcasts the SSID in the area. You can hide the
SSID instead, in which case the AP 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 devices to
get the SSID. In addition, unauthorized devices can still see the information that is sent in the
wireless network.
MAC Address Filter
Every wireless client has a unique identification number, called a MAC address.1 A MAC address is
usually written using twelve hexadecimal characters2; for example, 00A0C5000002 or
00:A0:C5:00:00:02. To get the MAC address for each wireless client, see the appropriate User’s
Guide or other documentation.
You can use the MAC address filter to tell the AP which wireless clients are allowed or not allowed to
use the wireless network. If a wireless client is allowed to use the wireless network, it still has to
56
1.
Some wireless devices, such as scanners, can detect wireless networks but cannot use wireless networks. These kinds
of wireless devices might not have MAC addresses.
2.
Hexadecimal characters are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, and F.
NBG4104 User’s Guide
Chapter 9 Wireless LAN
have the correct settings (SSID, channel, and security). If a wireless client is not allowed to use the
wireless network, it does not matter if it has the correct settings.
This type of security does not protect the information that is sent in the wireless network.
Furthermore, there are ways for unauthorized devices to get the MAC address of an authorized
wireless client. Then, they can use that MAC address to use the wireless network.
User Authentication
You can make every user log in to the wireless network before they can use it. This is called user
authentication. However, every wireless client in the wireless network has to support IEEE 802.1x
to do this.
For wireless networks, there are two typical places to store the user names and passwords for each
user.
• In the AP: this feature is called a local user database or a local database.
• In a RADIUS server: this is a server used in businesses more than in homes.
If your AP does not provide a local user database and if you do not have a RADIUS server, you
cannot set up user names and passwords for your users.
Unauthorized 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.
Local user databases also have an additional limitation that is explained in the next section.
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.
The types of encryption you can choose depend on the type of user authentication. (See page 57
for information about this.)
Table 14 Types of Encryption for Each Type of Authentication
Weakest
NO AUTHENTICATION
RADIUS SERVER
No Security
WPA
Static WEP
WPA-PSK
Strongest
WPA2-PSK
WPA2
For example, if the wireless network has a RADIUS server, you can choose WPA or WPA2. If users
do not log in to the wireless network, you can choose no encryption, Static WEP, WPA-PSK, or
WPA2-PSK.
Usually, you should set up the strongest encryption that every wireless client in the wireless
network supports. For example, suppose the AP does not have a local user database, and you do
not have a RADIUS server. Therefore, there is no user authentication. Suppose the wireless network
NBG4104 User’s Guide
57
Chapter 9 Wireless LAN
has two wireless clients. Device A only supports WEP, and device B supports WEP and WPA.
Therefore, you should set up Static WEP in the wireless network.
Note: It is recommended that wireless networks use WPA-PSK, WPA, or stronger
encryption. IEEE 802.1x and WEP encryption are better than none at all, but it is
still possible for unauthorized devices to figure out the original information pretty
quickly.
Note: It is not possible to use WPA-PSK, WPA or stronger encryption with a local user
database. In this case, it is better to set up stronger encryption with no
authentication than to set up weaker encryption with the local user database.
When you select WPA2-PSK in your NBG4104, you can also select an option (WPA Compatible)
to support WPA as well. In this case, if some wireless clients support WPA and some support WPA2,
you should set up WPA2-PSK (depending on the type of wireless network login) and select the
WPA Compatible option in the NBG4104.
Many types of encryption use a key to protect the information in the wireless network. The longer
the key, the stronger the encryption. Every wireless client in the wireless network must have the
same key.
WPS
WiFi Protected Setup (WPS) is an industry standard specification, defined by the WiFi Alliance. WPS
allows you to quickly set up a wireless network with strong security, without having to configure
security settings manually. Depending on the devices in your network, you can either press a
button (on the device itself, or in its configuration utility) or enter a PIN (Personal Identification
Number) in the devices. Then, they connect and set up a secure network by themselves. See how
to set up a secure wireless network using WPS in the Section 8.2 on page 45.
9.4 General Wireless LAN Screen
Use this screen to configure the SSID of the wireless LAN and configure the wireless security mode.
The screen varies depending on what you select in the Security Mode field.
Note: If you are configuring the NBG4104 from a computer connected to the wireless LAN
and you change the NBG4104’s SSID, channel 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 NBG4104’s new settings.
58
NBG4104 User’s Guide
Chapter 9 Wireless LAN
Click Configuration > Networking > Wireless LAN to open the General screen.
Figure 20 Configuration > Networking > Wireless LAN > General
The following table describes the general wireless LAN labels in this screen.
Table 15 Configuration > Networking > Wireless LAN > General
LABEL
DESCRIPTION
Wireless LAN
This shows whether the wireless LAN is ON or OFF. You can enable or disable the
wireless LAN by using the WLAN switch located on the back panel of the NBG4104.
Network
Name(SSID)
The SSID (Service Set IDentity) identifies the Service Set with which a wireless client is
associated. Enter a descriptive name (up to 32 printable characters found on a typical
English language keyboard) for the wireless LAN.
Enable
Select this to activate the wireless network.
Network
Name(SSID 1~3)
You can configure up to four SSIDs to enable multiple BSSs (Basic Service Sets) on the
NBG4104. This allows you to use one access point to provide several BSSs
simultaneously. You can then assign varying security types to different SSIDs. Wireless
clients can use different SSIDs to associate with the same access point.
Hide SSID
Select this check box to hide the SSID in the outgoing beacon frame so a station cannot
obtain the SSID through scanning using a site survey tool.
Channel Selection
This option is only available if Auto Channel Selection is disabled.
Note: According to the FCC regulation, users can only select the channels 1-11 for
802.11b/g/n-HT20 and 3-9 channels for 802.11n-HT40 mode. The other channels
that out of the permission above will be disabled from the channel selection.
Operating Channel
This displays the channel the NBG4104 is currently using.
SSID
Select a wireless LAN for which to configure security settings. The security settings only
apply to the selected wireless LAN.
Security Mode
Choose the security mode from the drop-down list box. See Section 9.5 on page 60 for
more information on wireless security settings.
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to reload the previous configuration for this screen.
See the rest of this chapter for information on the other labels in this screen.
NBG4104 User’s Guide
59
Chapter 9 Wireless LAN
9.5 Wireless Security
Use this part of the General screen to select the wireless security mode. Click Network >
Wireless LAN to open the General screen. The screen varies depending on what you select in the
Security Mode field.
9.5.1 No Security
Select No Security to allow wireless clients to communicate with the access points without any
data encryption.
Note: If you do not enable any wireless security on your NBG4104, your network is
accessible to any wireless networking device that is within range.
Figure 21 Wireless LAN > General: Security: No Security
The following table describes the labels in this screen.
Table 16 Wireless LAN > General: Security: No Security
LABEL
DESCRIPTION
SSID
Select a wireless LAN for which to configure security settings. The security settings only
apply to the selected wireless LAN.
Security Mode
Choose No Security from the drop-down list box.
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to reload the previous configuration for this screen.
9.5.2 WEP Encryption
WEP encryption scrambles the data transmitted between the wireless stations and the access points
to keep network communications private. It encrypts unicast and multicast communications in a
network. Both the wireless stations and the access points must use the same WEP key.
Your NBG4104 allows you to configure up to four 64-bit or 128-bit WEP keys but only one key can
be enabled at any one time.
60
NBG4104 User’s Guide
Chapter 9 Wireless LAN
Select Static WEP from the Security Mode list.
Figure 22 Wireless LAN > General: Security: Static WEP
The following table describes the wireless LAN security labels in this screen.
Table 17 Wireless LAN > General: Security: Static WEP
LABEL
DESCRIPTION
SSID
Select a wireless LAN for which to configure security settings. The security settings only
apply to the selected wireless LAN.
Security Mode
Select Static WEP to enable data encryption.
Default Key
Select a WEP Key as your default key.
WEP Key 1 to Key 4
The WEP keys are used to encrypt data. Both the NBG4104 and the wireless stations
must use the same WEP key for data transmission.
Select ASCII to enter ASCII characters or select Hex to enter hexadecimal characters
as WEP key.
You must configure at least one key, only one key can be activated at any one time.
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to reload the previous configuration for this screen.
NBG4104 User’s Guide
61
Chapter 9 Wireless LAN
9.5.3 WPA-PSK/WPA2-PSK
Select WPA-PSK or WPA2-PSK from the Security Mode list.
Figure 23 Wireless LAN > General: Security: WPA-PSK/WPA2-PSK
The following table describes the labels in this screen.
Table 18 Wireless LAN > General: Security: WPA-PSK/WPA2-PSK
LABEL
DESCRIPTION
SSID
Select a wireless LAN for which to configure security settings. The security settings only
apply to the selected wireless LAN.
Security Mode
Select WPA-PSK or WPA2-PSK to enable data encryption.
WPA Compatible
This field appears when you choose WPA2-PSK as the Security Mode.
Check this field to allow wireless devices using WPA-PSK security mode to connect to
your NBG4104.
WPA Algorithms
Select the encryption type (TKIP, AES, or TKIP or AES) for data encryption.
Select TKIP if your wireless clients can all use TKIP.
Select AES if your wireless clients can all use AES.
Select TKIP or AES to allow the wireless clients to use either TKIP or AES.
Pass Phrase
WPA-PSK/WPA2-PSK uses a simple common password for authentication.
Type a pass phrase from 8 to 63 case-sensitive keyboard characters.
Key Renewal
Interval
The is the rate at which the AP sends a new group key out to all clients.
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to reload the previous configuration for this screen.
9.6 MAC Filter
The MAC filter screen allows you to configure the NBG4104 to give exclusive access to devices
(Allow) or exclude devices from accessing the NBG4104 (Deny). Every Ethernet device has a unique
MAC (Media Access Control) address. The MAC address is assigned at the factory and consists of six
62
NBG4104 User’s Guide
Chapter 9 Wireless LAN
pairs of hexadecimal characters, for example, 00:A0:C5:00:00:02. You need to know the MAC
address of the devices to configure this screen.
To change your NBG4104’s MAC filter settings, click Configuration > Networking > Wireless
LAN > MAC Filter. The screen appears as shown.
Figure 24 Configuration > Networking > Wireless LAN > MAC Filter
The following table describes the labels in this menu.
Table 19 Configuration > Networking > Wireless LAN > MAC Filter
LABEL
DESCRIPTION
SSID
Select the SSID for which you want to configure MAC filtering.
Policy
Define the filter action for the list of MAC addresses in the MAC Address table.
Select Disable to deactivate the MAC filtering rule you configure below.
Select Allow to permit access to the NBG4104, MAC addresses not listed will be denied
access to the NBG4104.
Select Reject to block access to the NBG4104, MAC addresses not listed will be allowed
to access the NBG4104
Add a station Mac
Address
Enter the MAC addresses of the wireless station that are allowed or denied access to
the NBG4104 in these address fields. Enter the MAC addresses in a valid MAC address
format, that is, six hexadecimal character pairs, for example, 12:34:56:78:9a:bc. Click
Add.
Delete
Click the delete icon to remove the MAC address from the list.
MAC Address
This is the MAC address of the wireless station that are allowed or denied access to the
NBG4104.
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to reload the previous configuration for this screen.
9.7 Wireless LAN Advanced Screen
Use this screen to allow wireless advanced features, such as the output power, RTS/CTS Threshold
and high-throughput physical mode settings.
NBG4104 User’s Guide
63
Chapter 9 Wireless LAN
Click Configuration > Networking > Wireless LAN > Advanced. The screen appears as shown.
Figure 25 Configuration > Networking > Wireless LAN > Advanced
The following table describes the labels in this screen.
Table 20 Configuration > Networking > Wireless LAN > Advanced
LABEL
DESCRIPTION
RTS/CTS Threshold
Data with its frame size larger than this value will perform the RTS (Request To Send)/
CTS (Clear To Send) handshake.
Enter a value between 256 and 2432.
Fragmentation
Threshold
The threshold (number of bytes) for the fragmentation boundary for directed messages.
It is the maximum data fragment size that can be sent. Enter an even number between
256 and 2346.
Enable Intra-BSS
Traffic
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 disabled, wireless client A and B can still access the
wired network but cannot communicate with each other.
Output Power
Set the output power of the NBG4104 in this field. If there is a high density of APs in an
area, decrease the output power of the NBG4104 to reduce interference with other APs.
Select one of the following 100%, 90%, 75%, 50%, 25% or 10%. See the product
specifications for more information on your NBG4104’s output power.
HT (High Throughput) Physical Mode - Use the fields below to configure the 802.11 wireless environment of
your NBG4104.
Channel Bandwidth
Select the channel bandwidth you want to use for your wireless network.
It is recommended that you select 20/40 (20/40 MHz).
Select 20 MHz if you want to lessen radio interference with other wireless devices in
your neighborhood.
Guard Interval
Select Auto to increase data throughput. However, this may make data transfer more
prone to errors.
Select Long to prioritize data integrity. This may be because your wireless network is
busy and congested or the NBG4104 is located in an environment prone to radio
interference.
64
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to reload the previous configuration for this screen.
NBG4104 User’s Guide
Chapter 9 Wireless LAN
9.8 Quality of Service (QoS) Screen
The QoS screen allows you to automatically give a service (such as VoIP and video) a priority level.
Click Configuration > Networking > Wireless LAN > QoS. The following screen appears.
Figure 26 Configuration > Networking > Wireless LAN > QoS
The following table describes the labels in this screen.
Table 21 Configuration > Networking > Wireless LAN > QoS
LABEL
DESCRIPTION
Enable WMM QoS
Check this to have the NBG4104 automatically give a service a priority level according
to the ToS value in the IP header of packets it sends. WMM QoS (Wifi MultiMedia Quality
of Service) gives high priority to voice and video, which makes them run more
smoothly.
Apply
Click Apply to save your changes to the NBG4104.
Reset
Click Reset to reload the previous configuration for this screen.
9.9 WPS Screen
Use this screen to enable/disable WPS, view or generate a new PIN number and check current WPS
status. To open this screen, click Configuration > Networking > Wireless LAN > WPS tab.
Note: With WPS, wireless clients can only connect to the wireless network using the first
SSID on the NBG4104.
Figure 27 Configuration > Networking > Wireless LAN > WPS
NBG4104 User’s Guide
65
Chapter 9 Wireless LAN
The following table describes the labels in this screen.
Table 22 Configuration > Networking > Wireless LAN > WPS
LABEL
DESCRIPTION
Enable WPS
Select this to enable the WPS feature.
PIN Number
This displays a PIN number last time system generated. Click Generate to generate a
new PIN number.
Status
This displays Configured when the NBG4104 has connected to a wireless network
using WPS or when Enable WPS is selected and wireless or wireless security settings
have been changed. The current wireless and wireless security settings also appear in
the screen.
This displays Unconfigured if WPS is disabled and there are no wireless or wireless
security changes on the NBG4104 or you click Release_Configuration to remove the
configured wireless and wireless security settings.
Release
Configuration
This button is only available when the WPS status displays Configured.
802.11 Mode
This is the 802.11 mode used. Only compliant WLAN devices can associate with the
NBG4104.
SSID
This is the name of the wireless network (the NBG4104’s first SSID).
Security
This is the type of wireless security employed by the network.
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to reload the previous configuration for this screen.
Click this button to remove all configured wireless and wireless security settings for
WPS connections on the NBG4104.
9.10 WPS Station Screen
Use this screen when you want to add a wireless station using WPS. To open this screen, click
Configuration > Networking > Wireless LAN > WPS Station tab.
Note: After you click Push Button on this screen, you have to press a similar button in
the wireless station utility within 2 minutes. To add the second wireless station, you
have to press these buttons on both device and the wireless station again after the
first 2 minutes.
Figure 28 Configuration > Wireless LAN > WPS Station
66
NBG4104 User’s Guide
Chapter 9 Wireless LAN
The following table describes the labels in this screen.
Table 23 Configuration > Networking > Wireless LAN > WPS Station
LABEL
DESCRIPTION
Push Button
Use this button when you use the PBC (Push Button Configuration) method to configure
wireless stations’s wireless settings.
Click this to start WPS-aware wireless station scanning and the wireless security
information synchronization.
Or input station’s
PIN number
Use this button when you use the PIN Configuration method to configure wireless
station’s wireless settings.
Type the same PIN number generated in the wireless station’s utility. Then click Start
to associate to each other and perform the wireless security information
synchronization.
9.11 Scheduling Screen
Use this screen to set the times your wireless LAN is turned on and off. Wireless LAN scheduling is
disabled by default. The wireless LAN can be scheduled to turn on or off on certain days and at
certain times. To open this screen, click Configuration > Networking > Wireless LAN >
Scheduling tab.
Figure 29 Configuration > Networking > Wireless LAN > Scheduling
NBG4104 User’s Guide
67
Chapter 9 Wireless LAN
The following table describes the labels in this screen.
Table 24 Configuration > Networking > Wireless LAN > Scheduling
68
LABEL
DESCRIPTION
Enable Wireless LAN
Scheduling
Select this to enable Wireless LAN scheduling.
WLAN Status
Select On or Off to specify whether the Wireless LAN is turned on or off. This field
works in conjunction with the Day and For the following times fields.
Day
Select Everyday or the specific days to turn the Wireless LAN on or off. If you select
Everyday you can not select any specific days. This field works in conjunction with the
For the following times field.
At the following
times (24-Hour
Format)
Select a begin time using the first set of hour and minute (min) drop down boxes and
select an end time using the second set of hour and minute (min) drop down boxes. If
you have chosen On earlier for the WLAN Status the Wireless LAN will turn on between
the two times you enter in these fields. If you have chosen Off earlier for the WLAN
Status the Wireless LAN will turn off between the two times you enter in these fields.
Apply
Click Apply to save your changes back to the NBG4104.
NBG4104 User’s Guide
C HAPTER
10
WAN
10.1 Overview
This chapter discusses the NBG4104’s WAN screens. Use these screens to configure your NBG4104
for Internet access.
A WAN (Wide Area Network) connection is an outside connection to another network or the
Internet. It connects your private networks such as a LAN (Local Area Network) and other
networks, so that a computer in one location can communicate with computers in other locations.
Figure 30 LAN and WAN
LAN
WAN
10.2 What You Can Do
• Use the Management WAN screen to enter your ISP information and set how the computer
acquires its IP, DNS and WAN MAC addresses (Section 10.4 on page 72).
• Use the Advanced screen to enable multicasting and auto-IP-change (Section 10.5 on page 79).
10.3 What You Need To Know
The information in this section can help you configure the screens for your WAN connection, as well
as enable/disable some advanced features of your NBG4104.
NBG4104 User’s Guide
69
Chapter 10 WAN
10.3.1 Configuring Your Internet Connection
Encapsulation Method
Encapsulation is used to include data from an upper layer protocol into a lower layer protocol. To set
up a WAN connection to the Internet, you need to use the same encapsulation method used by your
ISP (Internet Service Provider). If your ISP offers a dial-up Internet connection using PPPoE (PPP
over Ethernet) or PPTP (Point-to-Point Tunneling Protocol), they should also provide a username
and password (and service name) for user authentication.
WAN IP Address
The WAN IP address is an IP address for the NBG4104, which makes it accessible from an outside
network. It is used by the NBG4104 to communicate with other devices in other networks. It can be
static (fixed) or dynamically assigned by the ISP each time the NBG4104 tries to access the
Internet.
If your ISP assigns you a static WAN IP address, they should also assign you the subnet mask and
DNS server IP address(es) (and a gateway IP address if you use the Ethernet or ENET ENCAP
encapsulation method).
DNS Server Address Assignment
Use Domain Name System (DNS) to map a domain name to its corresponding IP address and vice
versa, for instance, the IP address of www.zyxel.com is 204.217.0.2. The DNS server is extremely
important because without it, you must know the IP address of a computer before you can access
it.
The NBG4104 can get the DNS server addresses in the following ways.
The ISP tells you the DNS server addresses, usually in the form of an information sheet, when you
sign up. If your ISP gives you DNS server addresses, manually enter them in the DNS server fields.
If your ISP dynamically assigns the DNS server IP addresses (along with the NBG4104’s WAN IP
address), set the DNS server fields to get the DNS server address from the ISP.
WAN MAC Address
The MAC address screen allows users to configure the WAN port's MAC address by either using the
factory default or cloning the MAC address from a computer on your LAN. Choose Factory Default
to select the factory assigned default MAC Address.
Otherwise, click Clone the computer's MAC address - IP Address and enter the IP address of
the computer on the LAN whose MAC you are cloning. Once it is successfully configured, the
address will be copied to configuration file. It is recommended that you clone the MAC address prior
to hooking up the WAN Port.
Maximum Transmission Unit
A maximum transmission unit (MTU) is the largest size packet or frame, specified in octets (eightbit bytes) that can be sent in a packet- or frame-based network. The Transmission Control Protocol
70
NBG4104 User’s Guide
Chapter 10 WAN
(TCP) uses the MTU to determine the maximum size of each packet in any transmission. Too large
an MTU size may mean retransmissions if the packet encounters a router that can't handle that
large a packet. Too small an MTU size means relatively more header overhead and more
acknowledgements that have to be sent and handled.
10.3.2 Multicast
Traditionally, IP packets are transmitted in one of either two ways - Unicast (1 sender - 1 recipient)
or Broadcast (1 sender - everybody on the network). Multicast delivers IP packets to a group of
hosts on the network - not everybody and not just 1.
Figure 31 Multicast Example
Server
In the multicast example above, systems A and D comprise one multicast group. In multicasting,
the server only needs to send one data stream and this is delivered to systems A and D.
IGMP (Internet Group Multicast Protocol) is a network-layer protocol used to establish membership
in a multicast group - it is not used to carry user data. The NBG4104 supports both IGMP version 1
(IGMP-v1) and IGMP version 2 (IGMP-v2).
At start up, the NBG4104 queries all directly connected networks to gather group membership.
After that, the NBG4104 periodically updates this information. IP multicasting can be enabled/
disabled on the NBG4104 LAN and/or WAN interfaces in the Web Configurator (LAN; WAN). Select
None to disable IP multicasting on these interfaces.
Auto-IP-Change
When the NBG4104 gets a WAN IP address which is in the same subnet as the LAN IP address
192.168.1.1, Auto-IP-Change allows the NBG4104 to change its LAN IP address to 10.0.0.1
automatically. If the NBG4104’s original LAN IP address is 10.0.0.1 and the WAN IP address is in
NBG4104 User’s Guide
71
Chapter 10 WAN
the same subnet, such as 10.0.0.3, the NBG4104 switches to use 192.168.1.1 as its LAN IP
address.
Figure 32 Auto-IP-Change
LAN
192.168.1.1
WAN
192.168.1.23
10.0.0.1
Auto-IP-Change only works under the following conditions:
• The NBG4104 must be in Router Mode (see Chapter 23 on page 150 for more information) for
Auto-IP-Change to become active.
• The NBG4104 is set to receive a dynamic WAN IP address using the Ethernet or PPPoE connection
type.
10.4 Management WAN
Use this screen to view, change, or add your NBG4104’s Internet access settings. Click
Configuration > Networking > WAN. The following screen opens.
Figure 33 Configuration > Networking > Management WAN
The following table describes the labels in this screen.
Table 25 Configuration > Networking > Management WAN
72
LABEL
DESCRIPTION
Add New WAN Entry
Click this to create a new WAN interface entry.
This is the index number of the connection.
Default
Select the WAN interface that you want to configure as default.
Name
This is the service name of the connection.
Interface
This is the interface of the connection.
NBG4104 User’s Guide
Chapter 10 WAN
Table 25 Configuration > Networking > Management WAN (continued)
LABEL
DESCRIPTION
Type
This shows the type of interface used by this connection.
VLAN ID
This indicates the VLAN ID number assigned to traffic sent through this connection.
IP Address
This is the WAN IP address used by this connection.
Status
This shows the status of the connection.
Modify
Click the Edit icon to configure the connection.
Click the Delete icon to delete this connection from the NBG4104. A window displays
asking you to confirm that you want to delete the connection.
10.4.1 Add/Edit Internet Connection
Click the Add New WAN Entry in the Configuration > WAN screen or the Edit icon next to the
connection you want to configure. Use this screen to configure a WAN connection. The screen varies
depending on the encapsulation you select.
10.4.2 Ethernet Encapsulation
This screen displays when you select Ethernet encapsulation.
Figure 34 Internet Connection: Ethernet Encapsulation
NBG4104 User’s Guide
73
Chapter 10 WAN
The following table describes the labels in this screen.
Table 26 Internet Connection: Ethernet Encapsulation
LABEL
DESCRIPTION
ISP Parameters for Internet Access
Name
Enter a service name of the connection.
Encapsulation
You must choose the Ethernet option when the WAN port is used as a regular Ethernet.
WAN IP Address Assignment
Get automatically
from ISP (Default)
Select this option If your ISP did not assign you a fixed IP address. This is the default
selection.
Use Fixed IP
Address
Select this option If the ISP assigned a fixed IP address.
IP Address
Enter your WAN IP address in this field if you selected Use Fixed IP Address.
IP Subnet Mask
Enter the IP Subnet Mask in this field.
Gateway IP
Address
Enter a Gateway IP Address (if your ISP gave you one) in this field.
MTU Size
Enter the MTU (Maximum Transfer Unit) size for this traffic.
WAN DNS Assignment
First DNS Server
Second DNS Server
If you select Get automatically from ISP (Default) in the WAN IP Address
Assignment section, this field will automatically be set to From ISP. The field to the
right displays the (read-only) DNS server IP address that the ISP assigns.
If you select Use Fixed IP Address in the WAN IP Address Assignment section,
this field will automatically be set to User-Defined. Enter the DNS server's IP address
in the field to the right.
WAN MAC Address
The MAC address section allows users to configure the WAN port's MAC address by
either using the NBG4104’s MAC address, copying the MAC address from a computer on
your LAN or manually entering a MAC address.
Factory default
Select Factory default to use the factory assigned default MAC Address.
Clone the
computer’s MAC
address - IP
Address
Select Clone the computer's MAC address - IP Address and enter the IP address of
the computer on the LAN whose MAC you are cloning.
Set WAN MAC
Address
Select this option and enter the MAC address you want to use.
Apply
Click Apply to save your changes back to the NBG4104.
VLAN Settings
Enable VLAN
Select this to add the VLAN tag (specified in the VLAN ID field below) to the outgoing
traffic through this connection.
Ignore WAN VLAN
ID when tag frame
receive from LAN
side
Select this to ignore VLAN ID tagging if the tag frame is from the LAN.
VLAN ID
Type the VLAN ID number (from 1 to 4094) for traffic through this connection.
802.1P
IEEE 802.1p defines up to 8 separate traffic types by inserting a tag into a MAC-layer
frame that contains bits to define class of service.
Select the IEEE 802.1p priority level (from 0 to 7) to add to traffic through this
connection. The greater the number, the higher the priority level.
74
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to reload the previous configuration for this screen.
Cancel
Click Cancel to begin configuring this screen afresh.
NBG4104 User’s Guide
Chapter 10 WAN
10.4.3 PPPoE Encapsulation
The NBG4104 supports PPPoE (Point-to-Point Protocol over Ethernet). PPPoE is an IETF standard
(RFC 2516) specifying how a personal computer (PC) interacts with a broadband modem (DSL,
cable, wireless, etc.) connection. The PPP over Ethernet option is for a dial-up connection using
PPPoE.
For the service provider, PPPoE offers an access and authentication method that works with existing
access control systems (for example Radius).
One of the benefits of PPPoE is the ability to let you access one of multiple network services, a
function known as dynamic service selection. This enables the service provider to easily create and
offer new IP services for individuals.
Operationally, PPPoE saves significant effort for both you and the ISP or carrier, as it requires no
specific configuration of the broadband modem at the customer site.
By implementing PPPoE directly on the NBG4104 (rather than individual computers), the computers
on the LAN do not need PPPoE software installed, since the NBG4104 does that part of the task.
Furthermore, with NAT, all of the LANs’ computers will have access.
NBG4104 User’s Guide
75
Chapter 10 WAN
This screen displays when you select PPP over Ethernet encapsulation.
Figure 35 Internet Connection: PPP over Ethernet Encapsulation
The following table describes the labels in this screen.
Table 27 Internet Connection: PPP over Ethernet Encapsulation
LABEL
DESCRIPTION
ISP Parameters for Internet Access
76
Encapsulation
Select PPP over Ethernet if you connect to your Internet via dial-up.
Service Name
Type the name of your PPPoE service here.
User Name
Type the user name given to you by your ISP.
Password
Type the password associated with the user name above.
NBG4104 User’s Guide
Chapter 10 WAN
Table 27 Internet Connection: PPP over Ethernet Encapsulation (continued)
LABEL
DESCRIPTION
Retype to Confirm
Type your password again to make sure that you have entered is correctly.
PPPoE Passthrough
In addition to the NBG4104’s built-in PPPoE client, you can enable PPPoE pass through
to allow up to ten hosts on the LAN to use PPPoE client software on their computers to
connect to the ISP via the NBG4104. Each host can have a separate account and a
public WAN IP address.
PPPoE pass through is an alternative to NAT for application where NAT is not
appropriate.
Disable PPPoE pass through if you do not need to allow hosts on the LAN to use PPPoE
client software on their computers to connect to the ISP.
MTU Size
Enter the Maximum Transmission Unit (MTU) or the largest packet size per frame that
your NBG4104 can receive and process.
Nailed-Up
Connection
Select Nailed-Up Connection if you do not want the connection to time out.
Idle Timeout (sec)
This value specifies the time in minutes that elapses before the router automatically
disconnects from the PPPoE server.
WAN IP Address Assignment
Get automatically
from ISP
Select this option If your ISP did not assign you a fixed IP address. This is the default
selection.
Use Fixed IP
Address
Select this option If the ISP assigned a fixed IP address.
IP Address
Enter the static IP address provided by your ISP.
IP Subnet Mask
Enter the subnet mask provided by your ISP.
Gateway IP
Address
Enter the gateway IP address provided by your ISP.
WAN DNS Assignment
First DNS Server
Second DNS Server
Select From ISP if your ISP dynamically assigns DNS server information (and the
NBG4104's WAN IP address). The field to the right displays the (read-only) DNS server
IP address that the ISP assigns.
Select User-Defined if you have the IP address of a DNS server. Enter the DNS
server's IP address in the field to the right. If you chose User-Defined, but leave the
IP address set to 0.0.0.0, User-Defined changes to None after you click Apply. If you
set a second choice to User-Defined, and enter the same IP address, the second
User-Defined changes to None after you click Apply.
Select None if you do not want to configure DNS servers. If you do not configure a DNS
server, you must know the IP address of a computer in order to access it.
WAN MAC Address
The MAC address section allows users to configure the WAN port's MAC address by
using the NBG4104’s MAC address, copying the MAC address from a computer on your
LAN or manually entering a MAC address.
Factory default
Select Factory default to use the factory assigned default MAC Address.
Clone the
computer’s MAC
address - IP
Address
Select Clone the computer's MAC address - IP Address and enter the IP address of
the computer on the LAN whose MAC you are cloning.
Set WAN MAC
Address
Select this option and enter the MAC address you want to use.
VLAN Settings
Enable VLAN
NBG4104 User’s Guide
Select this to add the VLAN tag (specified in the VLAN ID field below) to the outgoing
traffic through this connection.
77
Chapter 10 WAN
Table 27 Internet Connection: PPP over Ethernet Encapsulation (continued)
LABEL
DESCRIPTION
Ignore WAN VLAN
ID when tag frame
receive from LAN
side
Select this to ignore VLAN ID tagging if the tag frame is from the LAN.
VLAN ID
Type the VLAN ID number (from 1 to 4094) for traffic through this connection.
802.1P
IEEE 802.1p defines up to 8 separate traffic types by inserting a tag into a MAC-layer
frame that contains bits to define class of service.
Select the IEEE 802.1p priority level (from 0 to 7) to add to traffic through this
connection. The greater the number, the higher the priority level.
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to reload the previous configuration for this screen.
Cancel
Click Cancel to begin configuring this screen afresh.
10.4.4 Bridge Encapsulation
This screen displays when you select Bridge encapsulation.
Figure 36 Internet Connection: Bridge Encapsulation
The following table describes the labels in this screen.
Table 28 Internet Connection: Bridge Encapsulation
LABEL
DESCRIPTION
ISP Parameters for Internet Access
Name
Enter a service name of the connection.
Encapsulation
Select Bridge when your ISP provides you more than one IP address and you want the
connected computers to get individual IP address from ISP’s DHCP server directly. If
you select Bridge, you cannot use routing functions, such as DHCP server.
VLAN Settings
Enable VLAN
78
Select this to add the VLAN tag (specified in the VLAN ID field below) to the outgoing
traffic through this connection.
NBG4104 User’s Guide
Chapter 10 WAN
Table 28 Internet Connection: Bridge Encapsulation (continued)
LABEL
DESCRIPTION
Ignore WAN VLAN
ID when tag frame
receive from LAN
side
Select this to ignore VLAN ID tagging if the tag frame is from the LAN.
VLAN ID
Type the VLAN ID number (from 1 to 4094) for traffic through this connection.
802.1P
IEEE 802.1p defines up to 8 separate traffic types by inserting a tag into a MAC-layer
frame that contains bits to define class of service.
Select the IEEE 802.1p priority level (from 0 to 7) to add to traffic through this
connection. The greater the number, the higher the priority level.
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to reload the previous configuration for this screen.
Cancel
Click Cancel to begin configuring this screen afresh.
10.5 Advanced WAN Screen
Use this screen to enable Multicast and enable Auto-IP-Change mode.
To change your NBG4104’s advanced WAN settings, click Configuration > Networking > WAN >
Advanced. The screen appears as shown.
Figure 37 Configuration > Networking > WAN > Advanced
The following table describes the labels in this screen.
Table 29 Configuration > Networking > WAN > Advanced
LABEL
DESCRIPTION
Multicast Setup
Multicast
Check this to enable multicasting. This applies to traffic routed from the WAN to the
LAN.
Leaving this blank may cause incoming traffic to be dropped or sent to all connected
network devices.
Auto-Subnet Configuration
NBG4104 User’s Guide
79
Chapter 10 WAN
Table 29 Configuration > Networking > WAN > Advanced (continued)
LABEL
DESCRIPTION
None
Select this option to have the NBG4104 do nothing when it gets a WAN IP address in
the range of 192.168.x.y (where x and y are from zero to nine) or in the same subnet
as the LAN IP address.
Enable Auto-IPChange mode
Select this option to have the NBG4104 change its LAN IP address to 10.0.0.1 or
192.168.1.1 accordingly when the NBG4104 gets a dynamic WAN IP address in the
same subnet as the LAN IP address 192.168.1.1 or 10.0.0.1.
The NAT, DHCP server and firewall functions on the NBG4104 are still available in this
mode.
80
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to begin configuring this screen afresh.
NBG4104 User’s Guide
C HAPTER
11
LAN
11.1 Overview
This chapter describes how to configure LAN settings.
A Local Area Network (LAN) is a shared communication system to which many computers are
attached. A LAN is a computer network limited to the immediate area, usually the same building or
floor of a building. The LAN screens can help you configure a LAN DHCP server, manage IP
addresses, and partition your physical network into logical networks.
Figure 38 LAN Example
WLAN
LAN
firewall
The LAN screens can help you manage IP addresses.
11.2 What You Can Do
• Use the IP screen to change the IP address for your NBG4104 (Section 11.4 on page 83).
• Use the IP Alias screen to have the NBG4104 apply IP alias to create LAN subnets (Section 11.5
on page 83).
NBG4104 User’s Guide
81
Chapter 11 LAN
11.3 What You Need To Know
The actual physical connection determines whether the NBG4104 ports are LAN or WAN ports.
There are two separate IP networks, one inside the LAN network and the other outside the WAN
network as shown next.
Figure 39 LAN and WAN IP Addresses
The LAN parameters of the NBG4104 are preset in the factory with the following values:
• IP address of 192.168.1.1 with subnet mask of 255.255.255.0 (24 bits)
• DHCP server enabled with 32 client IP addresses starting from 192.168.1.33.
These parameters should work for the majority of installations. If your ISP gives you explicit DNS
server address(es), read the embedded Web Configurator help regarding what fields need to be
configured.
11.3.1 IP Pool Setup
The NBG4104 is pre-configured with a pool of 32 IP addresses starting from 192.168.1.33 to
192.168.1.64. This configuration leaves 31 IP addresses (excluding the NBG4104 itself) in the
lower range (192.168.1.2 to 192.168.1.32) for other server computers, for instance, servers for
mail, T, web, etc., that you may have.
11.3.2 LAN TCP/IP
The NBG4104 has built-in DHCP server capability that assigns IP addresses and DNS servers to
systems that support DHCP client capability.
11.3.3 IP Alias
IP alias allows you to partition a physical network into different logical networks over the same
Ethernet interface. The NBG4104 supports three logical LAN interfaces via its single physical
Ethernet interface with the NBG4104 itself as the gateway for each LAN network.
82
NBG4104 User’s Guide
Chapter 11 LAN
11.4 LAN IP Screen
Use this screen to change the IP address for your NBG4104. Click Configuration > Networking >
LAN > IP.
Figure 40 Configuration > Networking > LAN > IP
The following table describes the labels in this screen.
Table 30 Configuration > Networking > LAN > IP
LABEL
DESCRIPTION
IP Address
Type the IP address of your NBG4104 in dotted decimal notation.
IP Subnet Mask
The subnet mask specifies the network number portion of an IP address. Your NBG4104
will automatically calculate the subnet mask based on the IP address that you assign.
Unless you are implementing subnetting, use the subnet mask computed by the
NBG4104.
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to begin configuring this screen afresh.
11.5 IP Alias Screen
Use this screen to have the NBG4104 apply IP alias to create LAN subnets. Click Configuration >
Networking > LAN > IP Alias.
Figure 41 Configuration > Networking > LAN > IP Alias
NBG4104 User’s Guide
83
Chapter 11 LAN
The following table describes the labels in this screen.
Table 31 Configuration > Networking > LAN > IP Alias
84
LABEL
DESCRIPTION
Enable IP Alias
Check this to enable IP alias.
IP Address
Type the IP alias address of your NBG4104 in dotted decimal notation.
IP Subnet Mask
The subnet mask specifies the network number portion of an IP address. Your NBG4104
will automatically calculate the subnet mask based on the IP address that you assign.
Unless you are implementing subnetting, use the subnet mask computed by the
NBG4104.
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to begin configuring this screen afresh.
NBG4104 User’s Guide
C HAPTER
12
DHCP Server
12.1 Overview
DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows individual clients to
obtain TCP/IP configuration at start-up from a server. You can configure the NBG4104’s LAN as a
DHCP server or disable it. When configured as a server, the NBG4104 provides the TCP/IP
configuration for the clients. If DHCP service is disabled, you must have another DHCP server on
your LAN, or else the computer must be manually configured.
12.2 What You Can Do
• Use the General screen to enable the DHCP server (Section 12.4 on page 86).
• Use the Advanced screen to assign IP addresses on the LAN to specific individual computers
based on their MAC Addresses (Section 12.5 on page 87).
12.3 What You Need To Know
The following terms and concepts may help as you read through this chapter.
MAC Addresses
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. Find out the MAC addresses of your network devices if you intend to add them
to the DHCP Client List screen.
NBG4104 User’s Guide
85
Chapter 12 DHCP Server
12.4 The DHCP General Screen
Use this screen to enable the DHCP server. Click Configuration > Networking > DHCP Server.
The General screen displays.
Figure 42 Configuration > Networking > DHCP Server > General
The following table describes the labels in this screen.
Table 32 Configuration > Networking > DHCP Server > General
LABEL
DESCRIPTION
Enable DHCP Server
Select the checkbox to enable DHCP for LAN.
DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows individual
clients (computers) to obtain TCP/IP configuration at startup from a server. Leave the
Enable DHCP Server check box selected unless your ISP instructs you to do
otherwise. Clear it to disable the NBG4104 acting as a DHCP server. When configured
as a server, the NBG4104 provides TCP/IP configuration for the clients. If not, DHCP
service is disabled and you must have another DHCP server on your LAN, or else the
computers must be manually configured. When set as a server, fill in the following four
fields.
86
IP Pool Starting
Address
This field specifies the first of the contiguous addresses in the IP address pool for LAN.
Pool Size
This field specifies the size, or count of the IP address pool for LAN.
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to begin configuring this screen afresh.
NBG4104 User’s Guide
Chapter 12 DHCP Server
12.5 The DHCP Advanced Screen
This screen allows you to assign IP addresses on the LAN to specific individual computers based on
their MAC addresses. You can also use this screen to configure the DNS server information that the
NBG4104 sends to the DHCP clients.
To change your NBG4104’s static DHCP settings, click Configuration > Networking > DHCP
Server > Advanced. The following screen displays.
Figure 43 Configuration > Networking > DHCP Server > Advanced
The following table describes the labels in this screen.
Table 33 Configuration > Networking > DHCP Server > Advanced
LABEL
DESCRIPTION
Static DHCP Table
This is the index number of the static IP table entry (row).
MAC Address
Type the MAC address (with colons) of a computer on your LAN.
IP Address
Type the LAN IP address of a computer on your LAN.
DNS Server
DNS Servers
Assigned by DHCP
Server
NBG4104 User’s Guide
The NBG4104 passes a DNS (Domain Name System) server IP address (in the order
you specify here) to the DHCP clients. The NBG4104 only passes this information to the
LAN DHCP clients when you select the Enable DHCP Server check box. When you
clear the Enable DHCP Server check box, DHCP service is disabled and you must have
another DHCP sever on your LAN, or else the computers must have their DNS server
addresses manually configured.
87
Chapter 12 DHCP Server
Table 33 Configuration > Networking > DHCP Server > Advanced (continued)
LABEL
DESCRIPTION
First DNS Server
Select From ISP if your ISP dynamically assigns DNS server information (and the
NBG4104's WAN IP address). The field to the right displays the (read-only) DNS server
IP address that the ISP assigns.
Second DNS Server
Select User-Defined if you have the IP address of a DNS server. Enter the DNS
server's IP address in the field to the right. If you chose User-Defined, but leave the
IP address set to 0.0.0.0, User-Defined changes to None after you click Apply. If you
set a second choice to User-Defined, and enter the same IP address, the second
User-Defined changes to None after you click Apply.
Select DNS Relay to have the NBG4104 act as a DNS proxy. The NBG4104's LAN IP
address displays in the field to the right (read-only). The NBG4104 tells the DHCP
clients on the LAN that the NBG4104 itself is the DNS server. When a computer on the
LAN sends a DNS query to the NBG4104, the NBG4104 forwards the query to the
NBG4104's system DNS server (configured in the WAN > Internet Connection
screen) and relays the response back to the computer. You can only select DNS Relay
for one of the three servers; if you select DNS Relay for a second or third DNS server,
that choice changes to None after you click Apply.
Select None if you do not want to configure DNS servers. If you do not configure a DNS
server, you must know the IP address of a computer in order to access it.
88
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to begin configuring this screen afresh.
NBG4104 User’s Guide
C HAPTER
13
NAT
13.1 Overview
NAT (Network Address Translation - NAT, RFC 1631) is the translation of the IP address of a host in
a packet. For example, the source address of an outgoing packet, used within one network is
changed to a different IP address known within another network.
The figure below is a simple illustration of a NAT network. You want to assign ports 21-25 to one,
Telnet and SMTP server (A in the example), port 80 to another (B in the example) and assign a
default server IP address of 192.168.1.35 to a third (C in the example).
You assign the LAN IP addresses to the devices (A to D) connected to your NBG4104. The ISP
assigns the WAN IP address. The NAT network appears as a single host on the Internet. All traffic
coming from A to D going out to the Internet use the IP address of the NBG4104, which is
192.168.1.1.
Figure 44 NAT Example
A: 192.168.1.33
LAN
, Telnet, SNMP
Ports 21 to 25
WAN
192.168.1.1
B: 192.168.1.34
Port 80
IP address
assigned by ISP
C: 192.168.1.35
This chapter discusses how to configure NAT on the NBG4104.
Note: You must create a firewall rule in addition to setting up NAT, to allow traffic from
the WAN to be forwarded through the NBG4104.
NBG4104 User’s Guide
89
Chapter 13 NAT
13.2 What You Can Do
• Use the General screen to enable NAT and set a default server (Section 13.4 on page 92).
• Use the Application screen to change your NBG4104’s port forwarding settings (Section 13.5 on
page 92).
13.3 What You Need To Know
The following terms and concepts may help as you read through this chapter.
Inside/Outside
This denotes where a host is located relative to the NBG4104, for example, the computers of your
subscribers are the inside hosts, while the web servers on the Internet are the outside hosts.
Global/Local
This denotes the IP address of a host in a packet as the packet traverses a router, for example, the
local address refers to the IP address of a host when the packet is in the local network, while the
global address refers to the IP address of the host when the same packet is traveling in the WAN
side.
Note: Inside/outside refers to the location of a host, while global/local refers to the IP
address of a host used in a packet.
An inside local address (ILA) is the IP address of an inside host in a packet when the packet is still
in the local network, while an inside global address (IGA) is the IP address of the same inside host
when the packet is on the WAN side. The following table summarizes this information.
Table 34 NAT Definitions
ITEM
DESCRIPTION
Inside
This refers to the host on the LAN.
Outside
This refers to the host on the WAN.
Local
This refers to the packet address (source or
destination) as the packet travels on the LAN.
Global
This refers to the packet address (source or
destination) as the packet travels on the WAN.
Note: NAT never changes the IP address (either local or global) of an outside host.
What NAT Does
In the simplest form, NAT changes the source IP address in a packet received from a subscriber
(the inside local address) to another (the inside global address) before forwarding the packet to the
WAN side. When the response comes back, NAT translates the destination address (the inside
90
NBG4104 User’s Guide
Chapter 13 NAT
global address) back to the inside local address before forwarding it to the original inside host. Note
that the IP address (either local or global) of an outside host is never changed.
The global IP addresses for the inside hosts can be either static or dynamically assigned by the ISP.
In addition, you can designate servers, for example, a web server and a telnet server, on your local
network and make them accessible to the outside world. If you do not define any servers, NAT
offers the additional benefit of firewall protection. With no servers defined, your NBG4104 filters out
all incoming inquiries, thus preventing intruders from probing your network. For more information
on IP address translation, refer to RFC 1631, The IP Network Address Translator (NAT).
How NAT Works
Each packet has two addresses – a source address and a destination address. For outgoing packets,
the ILA (Inside Local Address) is the source address on the LAN, and the IGA (Inside Global
Address) is the source address on the WAN. For incoming packets, the ILA is the destination
address on the LAN, and the IGA is the destination address on the WAN. NAT maps private (local)
IP addresses to globally unique ones required for communication with hosts on other networks. It
replaces the original IP source address in each packet and then forwards it to the Internet. The
NBG4104 keeps track of the original addresses and port numbers so incoming reply packets can
have their original values restored. The following figure illustrates this.
Figure 45 How NAT Works
NBG4104 User’s Guide
91
Chapter 13 NAT
13.4 The NAT General Screen
Use this screen to enable NAT and set a default server. Click Configuration > Networking > NAT
to open the General screen.
Figure 46 Configuration > Networking > NAT > General
The following table describes the labels in this screen.
Table 35 Configuration > Networking > NAT > General
LABEL
DESCRIPTION
NAT Setup
Enable Network
Address Translation
Network Address Translation (NAT) allows the translation of an Internet protocol
address used within one network (for example a private IP address used in a local
network) to a different IP address known within another network (for example a public
IP address used on the Internet).
Select the check box to enable NAT.
Default Server Setup
Server IP Address
In addition to the servers for specified services, NAT supports a default server. A
default server receives packets from ports that are not specified in the Application
screen.
If you do not assign a Default Server IP address, the NBG4104 discards all packets
received for ports that are not specified in the Application screen or remote
management.
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to begin configuring this screen afresh.
13.5 The NAT Application Screen
This screen allows you to define the local servers to which the incoming services will be forwarded.
To change your NBG4104’s NAT application settings, click Configuration > Networking > NAT >
Application. The screen appears as shown.
Note: If you do not assign a Default Server IP address in the NAT > General screen,
the NBG4104 discards all packets received for ports that are not specified in this
screen or remote management.
92
NBG4104 User’s Guide
Chapter 13 NAT
Refer to Appendix F on page 227 for port numbers commonly used for particular services.
Figure 47 Configuration > Networking > NAT > Application
The following table describes the labels in this screen.
Table 36 Configuration > Networking > NAT > Application
LABEL
DESCRIPTION
Add Application Rule
Service Name
Select User-Defined and type a name (of up to 31 printable characters) to identify this
rule in the first field next to Service Name. Otherwise, select a predefined service in
the second field next to Service Name. The predefined service name and port
number(s) will display in the Service Name and Port fields.
Local Port Range
Enter the start and end port(s) to be forwarded.
Public Port Range
Protocol
Select the protocol supported by this service. Choices are TCP/UDP, TCP, or UDP.
Server IP Address
Type the inside IP address of the server that receives packets from the port(s) specified
in the Port field.
Application Rules Summary
This is the number of an individual port forwarding server entry.
Name
This field displays a name to identify this rule.
Local Start Port/End
Port
This is the first and last internal port number that identifies a service.
Public Start Port/
End Port
This is the first and last external port number that identifies a service.
Protocol
This is the protocol used by this service.
Server IP Address
This field displays the inside IP address of the server.
Modify
Click the Edit icon to display and modify an existing rule setting in the fields under Add
Application Rule.
Click the Remove icon to delete a rule.
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to begin configuring this screen afresh.
NBG4104 User’s Guide
93
Chapter 13 NAT
94
NBG4104 User’s Guide
C HAPTER
14
DDNS
14.1 Overview
DDNS services let you use a domain name with a dynamic IP address.
14.2 What You Need To Know
The following terms and concepts may help as you read through this chapter.
What is DDNS?
DDNS, or Dynamic DNS, allows you to update your current dynamic IP address with one or many
dynamic DNS services so that anyone can contact you (in NetMeeting, CU-SeeMe, etc.). You can
also access your server or Web site on your own computer using a domain name (for instance
myhost.dhs.org, where myhost is a name of your choice) that will never change instead of using an
IP address that changes each time you reconnect. Your friends or relatives will always be able to
call you even if they don't know your IP address.
DynDNS Wildcard
Enabling the wildcard feature for your host causes *.yourhost.dyndns.org to be aliased to the same
IP address as yourhost.dyndns.org. This feature is useful if you want to be able to use, for example,
www.yourhost.dyndns.org and still reach your hostname.
Note: If you have a private WAN IP address, then you cannot use Dynamic DNS. You
must have a public WAN IP address.
NBG4104 User’s Guide
95
Chapter 14 DDNS
14.3 The DDNS General Screen
To change your NBG4104’s DDNS, click Configuration > Networking > DDNS. The General
screen appears as shown.
Figure 48 Configuration > Networking > DDNS > General
The following table describes the labels in this screen.
Table 37 Configuration > Networking > DDNS > General
LABEL
DESCRIPTION
Dynamic DNS Setup
96
Enable Dynamic
DNS
Select this check box to use dynamic DNS.
Service Provider
Select the name of your Dynamic DNS service provider.
Dynamic DNS Type
Select the type of service that you are registered for from your Dynamic DNS service
provider.
Host Name
Enter a host names in the field provided. You can specify up to two host names in the
field separated by a comma (",").
User Name
Enter your user name.
Password
Enter the password assigned to you.
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to begin configuring this screen afresh.
NBG4104 User’s Guide
C HAPTER
15
Static Route
15.1 Overview
This chapter shows you how to configure static routes for your NBG4104.
Each remote node specifies only the network to which the gateway is directly connected, and the
NBG4104 has no knowledge of the networks beyond. For instance, the NBG4104 knows about
network N2 in the following figure through remote node Router 1. However, the NBG4104 is unable
to route a packet to network N3 because it doesn't know that there is a route through the same
remote node Router 1 (via gateway Router 2). The static routes are for you to tell the NBG4104
about the networks beyond the remote nodes.
Figure 49 Example of Static Routing Topology
NBG4104 User’s Guide
97
Chapter 15 Static Route
15.2 IP Static Route Screen
Click Configuration > Networking > Static Route to open the IP Static Route screen.
Figure 50 Configuration > Networking > Static Route > IP Static Route
The following table describes the labels in this screen.
Table 38 Configuration > Networking > Static Route > IP Static Route
LABEL
DESCRIPTION
Static Routing Settings
Route Name
Enter a the name that describes or identifies this route.
Destination IP
Address
Enter the IP network address of the final destination.
IP Subnet Netmask
This is the subnet to which the route’s final destination belongs.
Gateway IP Address
Enter the IP address of the gateway.
Metric
Assign a number to identify the route.
Interface
Select the interface through which the traffic is routed.
Add Rule
Click this to add the IP static route.
Application Rules Summary
98
No.
This is the number of an individual static route.
Active
The rules are always on and this is indicated by the icon.
Name
This is the name that describes or identifies this route.
Destination
This parameter specifies the IP network address of the final destination. Routing is
always based on network number.
Gateway
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 or WAN port. The gateway helps forward packets
to their destinations.
Metric
This is the number assigned to the route.
Interface
This is the interface through which the traffic is routed.
NBG4104 User’s Guide
Chapter 15 Static Route
Table 38 Configuration > Networking > Static Route > IP Static Route (continued)
LABEL
DESCRIPTION
Delete
Click the Delete icon to remove a static route from the NBG4104. A window displays
asking you to confirm that you want to delete the route.
Reset
Click Reset to begin configuring this screen afresh.
NBG4104 User’s Guide
99
Chapter 15 Static Route
100
NBG4104 User’s Guide
C HAPTER
16
VLAN Operation
16.1 Overview
Use these screens to configure the VLAN ID and IEEE 802.1p priority tags for LAN to WAN and WAN
to LAN traffic.
16.2 What You Can Do
• Use the LAN To WAN screen to control the VLAN ID and IEEE 802.1p priority tags of traffic sent
from individual LAN ports (Section 16.3 on page 101).
• Use the WAN To LAN screen to control the VLAN ID and IEEE 802.1p priority tags of traffic sent
to individual LAN ports (Section 16.4 on page 105).
16.3 LAN To WAN Screen
Click Co figuration > Networking > VLAN Operation to open the LAN To WAN screen. Use this
screen to control the VLAN ID and IEEE 802.1p priority tags of traffic sent from individual LAN
ports.
Figure 51 Configuration > Networking > VLAN Operation > LAN To WAN
The following table describes the labels in this screen.
Table 39 Configuration > Networking > VLAN Operation > LAN To WAN
LABEL
DESCRIPTION
Current Settings
Add
Click this to create a new classifier.
Class
NBG4104 User’s Guide
101
Chapter 16 VLAN Operation
Table 39 Configuration > Networking > VLAN Operation > LAN To WAN (continued)
LABEL
DESCRIPTION
This is the index number of the entry.
Active
This field displays whether the classifier is active or not. A yellow bulb signifies that this
classifier is active. A gray bulb signifies that this classifier is not active.
Class Name
This is the name of the classifier.
Classification
Criteria
This shows criteria specified in this classifier, for example the interface from which
traffic of this class should come and the source MAC address of traffic that matches this
classifier.
VLAN Operation
This shows the VLAN operation used for this classifier.
802.1P Mark
This is the IEEE 802.1p priority level assigned to traffic of this classifier.
VLAN ID Tag
This is the VLAN ID number assigned to traffic of this classifier.
Modify
Click the Edit icon to display and modify an existing classifier setting.
Click the Remove icon to delete a classifier.
102
NBG4104 User’s Guide
Chapter 16 VLAN Operation
16.3.1 Add/Edit VLAN Rule
Click Add in the LAN to WAN screen or the Edit icon next to a classifier to open the following
screen.
Figure 52 LAN To WAN > Add/Edit
The following table describes the labels in this screen.
Table 40 LAN To WAN: Add/Edit
LABEL
DESCRIPTION
Class configuration
Active
Select this to enable this classifier.
Class Name
Enter a descriptive name of up to 15 printable English keyboard characters, not
including spaces.
Classification Order
Select an existing number for where you want to put this classifier to move the classifier
to the number you selected after clicking Apply.
Select Last to put this rule in the back of the classifier list.
Criteria configuration
Basic
NBG4104 User’s Guide
103
Chapter 16 VLAN Operation
Table 40 LAN To WAN: Add/Edit (continued)
LABEL
DESCRIPTION
From Interface
If you want to classify the traffic by an ingress interface, select an interface from the
From Interface drop-down list box.
Ether Type
Select a predefined application to configure a class for the matched traffic.
If you select IP, you also need to configure source or destination MAC address, IP
address, DHCP options, DSCP value or the protocol type.
If you select 802.1Q, you can configure an 802.1p priority level.
Source
Address
Select the check box and enter the source IP address in dotted decimal notation. A
blank source IP address means any source IP address.
Subnet Mask
Enter the source subnet mask.
Port Range
If you select TCP or UDP in the IP Protocol field, select the check box and enter the
port number(s) of the source.
MAC
Select the check box and enter the source MAC address of the packet.
MAC Mask
Type the mask for the specified MAC address to determine which bits a packet’s MAC
address should match.
Enter “f” for each bit of the specified source MAC address that the traffic’s MAC address
should match. Enter “0” for the bit(s) of the matched traffic’s MAC address, which can
be of any hexadecimal character(s). For example, if you set the MAC address to
00:13:49:00:00:00 and the mask to ff:ff:ff:00:00:00, a packet with a MAC address of
00:13:49:12:34:56 matches this criteria.
Exclude
Select this option to exclude the packets that match the specified criteria from this
classifier.
Destination
Address
Select the check box and enter the source IP address in dotted decimal notation. A
blank source IP address means any source IP address.
Subnet Mask
Enter the source subnet mask.
Port Range
If you select TCP or UDP in the IP Protocol field, select the check box and enter the
port number(s) of the source.
MAC
Select the check box and enter the source MAC address of the packet.
MAC Mask
Type the mask for the specified MAC address to determine which bits a packet’s MAC
address should match.
Enter “f” for each bit of the specified source MAC address that the traffic’s MAC address
should match. Enter “0” for the bit(s) of the matched traffic’s MAC address, which can
be of any hexadecimal character(s). For example, if you set the MAC address to
00:13:49:00:00:00 and the mask to ff:ff:ff:00:00:00, a packet with a MAC address of
00:13:49:12:34:56 matches this criteria.
Exclude
Select this option to exclude the packets that match the specified criteria from this
classifier.
Others
IP Protocol
This field is available only when you select IP in the Ether Type field.
Select this option and select the protocol (service type) from TCP, UDP, ICMP or IGMP.
If you select User defined, enter the protocol (service type) number.
DSCP
This field is available only when you select IP in the Ether Type field.
Select this option and specify a DSCP (DiffServ Code Point) number between 0 and 63
in the field provided.
VLAN tag
104
NBG4104 User’s Guide
Chapter 16 VLAN Operation
Table 40 LAN To WAN: Add/Edit (continued)
LABEL
VLAN Operation
DESCRIPTION
If you select Add, the NBG4104 treat all matched traffic untagged and add a second
VLAN ID.
If you select Remark VLAN ID, enter a VLAN ID number in the VLAN ID field below
with which the NBG4104 replaces the VLAN ID of the frames.
If you select Remark 1P, select a priority level from the 802.1P Mark field below with
which the NBG4104 replaces the IEEE 802.1p priority field in the packets.
If you select Remark VLAN ID and 1P, select a priority level from the 802.1P Mark
field and enter a VLAN ID number in the VLAN ID field below.
If you select Remove, the NBG4104 deletes the VLAN ID of the frames before
forwarding them out.
802.1P Mark
Select a priority level with which the NBG4104 replaces the IEEE 802.1p priority field in
the packets.
If you select Unchange, the NBG4104 keep the 802.1p priority field in the packets.
VLAN ID
Enter a VLAN ID number with which the NBG4104 replaces the VLAN ID of the frames.
Cancel
Click Cancel to exit this screen without saving.
Apply
Click Apply to save your changes.
Reset
Click Reset to begin configuring this screen afresh.
16.4 WAN To LAN Screen
Click Configuration > Networking > VLAN Operation > WAN To LAN to open this screen. Use
this screen to control the VLAN ID and IEEE 802.1p priority tags of traffic sent to individual LAN
ports.
Figure 53 Configuration > Networking > VLAN Operation > WAN To LAN
NBG4104 User’s Guide
105
Chapter 16 VLAN Operation
The following table describes the labels in this screen.
Table 41 Configuration > Networking > VLAN Operation > WAN To LAN
LABEL
DESCRIPTION
Lan Port
These represent the NBG4104’s LAN ports.
TAG Operation
Select what you want the NBG4104 to do to the IEEE 802.1q VLAN ID and priority tags
of downstream traffic before sending it out through this LAN port.
•
•
•
•
•
•
106
Unchange - Don’t do anything to the traffic’s VLAN ID and priority tags.
Add - Add VLAN ID and priority tags to untagged traffic.
Remark VLAN ID - Change the value of the outer VLAN ID.
Remark 1P - Change the value of the priority tags.
Remark VLAN ID and 1P - Change the value of the outer VLAN ID and priority
tags.
Remove - Delete one tag from tagged traffic. If the frame has double tags, this
removes the outer tag. This does not affect untagged traffic.
802.1P Mark
Use this option to set what to do for the IEEE 802.1p priority tags when you add or
remark the tags for a LAN port’s downstream traffic. Either select Unchange to not
modify the traffic’s priority tags or select an priority from 0 to 7 to use. The larger the
number, the higher the priority.
VLAN ID
If you will add or remark tags for this LAN port’s downstream traffic, specify the VLAN
ID (from 0 to 4094) to use here.
Apply
Click Apply to save your changes.
Reset
Click Reset to begin configuring this screen afresh.
NBG4104 User’s Guide
C HAPTER
17
Interface Group
17.1 Overview
By default, all LAN and WAN interfaces on the NBG4104 are in the same group and can
communicate with each other. You can create multiple groups to have the NBG4104 assign the IP
addresses in different domains to different groups. Each group acts as an independent network on
the NBG4104.
17.2 The Interface Group Screen
You can manually add a LAN interface or a VLAN ID to a new group. Click Configuration >
Networking > Interface Group to open the following screen.
Figure 54 Configuration > Networking > Interface Group
The following table describes the fields in this screen.
Table 42 Configuration > Networking > Interface Group
LABEL
DESCRIPTION
Add
Click this to add a new interface grouping rule.
You must configure a WAN connection before you can add a new interface grouping
rule. See Chapter 10 on page 69 for more information.
Name
This shows the descriptive name of the group.
LAN Interfaces
This shows the LAN interfaces in the group.
VLAN
This shows the VLAN ID configured in the group.
NBG4104 User’s Guide
107
Chapter 17 Interface Group
Table 42 Configuration > Networking > Interface Group (continued)
LABEL
DESCRIPTION
WAN Interfaces
This shows the WAN interfaces in the group.
Modify
Select the Delete icon to delete the group from the NBG4104.
17.2.1 Interface Group Configuration
Click the Add button in the Interface Group screen to open the following screen. Use this screen
to create a new interface group.
Note: An interface can belong to a group only.
Figure 55 Interface Grouping Configuration
The following table describes the fields in this screen.
Table 43 Interface Grouping Configuration
108
LABEL
DESCRIPTION
Group Name
Enter a name to identify this group.
WAN Interfaces
used in the
grouping
Select the WAN interface this group uses. The group can have up to one PTM interface
and up to one ATM interface.
NBG4104 User’s Guide
Chapter 17 Interface Group
Table 43 Interface Grouping Configuration (continued)
LABEL
DESCRIPTION
Grouped LAN
Interfaces
Select a LAN or WAN interface in Available LAN Interfaces and use the left-facing
arrow to move it to the Grouped LAN Interfaces to add the interface to this group.
Available LAN
Interfaces
To remove a LAN or WAN interface from the Grouped LAN Interfaces, select it and
click the right-facing arrow.
Grouped VLAN
Enter a VLAN ID in the VLAN ID field and use the left-facing arrow to move it to the
Grouped VLAN to add it to a VLAN group.
To remove a VLAN ID from the Grouped VLAN, select it and click the right-facing
arrow.
Apply
Click Apply to save your changes.
Cancel
Click Cancel to begin configuring this screen afresh.
NBG4104 User’s Guide
109
Chapter 17 Interface Group
110
NBG4104 User’s Guide
C HAPTER
18
Firewall
18.1 Overview
Use these screens to enable and configure the firewall that protects your NBG4104 and your LAN
from unwanted or malicious traffic.
Enable the firewall to protect your LAN computers from attacks by hackers on the Internet and
control access between the LAN and WAN. By default the firewall:
• allows traffic that originates from your LAN computers to go to all of the networks.
• blocks traffic that originates on the other networks from going to the LAN.
The following figure illustrates the default firewall action. User A can initiate an IM (Instant
Messaging) session from the LAN to the WAN (1). Return traffic for this session is also allowed (2).
However other traffic initiated from the WAN is blocked (3 and 4).
Figure 56 Default Firewall Action
WAN
LAN
18.2 What You Can Do
• Use the General screen to enable or disable the NBG4104’s firewall (Section 18.4 on page 113).
• Use the Access Control Rule screen to view the configured access control rules and edit or
remove a rule (Section 18.5.1 on page 115).
• Use the Services screen to configure the NBG4104’s ICMP settings (Section 18.6 on page 116).
NBG4104 User’s Guide
111
Chapter 18 Firewall
18.3 What You Need To Know
The following terms and concepts may help as you read through this chapter.
What is a Firewall?
Originally, the term “firewall” referred to a construction technique designed to prevent the spread of
fire from one room to another. The networking term "firewall" is a system or group of systems that
enforces an access-control policy between two networks. It may also be defined as a mechanism
used to protect a trusted network from a network that is not trusted. Of course, firewalls cannot
solve every security problem. A firewall is one of the mechanisms used to establish a network
security perimeter in support of a network security policy. It should never be the only mechanism or
method employed. For a firewall to guard effectively, you must design and deploy it appropriately.
This requires integrating the firewall into a broad information-security policy. In addition, specific
policies must be implemented within the firewall itself.
Stateful Inspection Firewall
Stateful inspection firewalls restrict access by screening data packets against defined access rules.
They make access control decisions based on IP address and protocol. They also "inspect" the
session data to assure the integrity of the connection and to adapt to dynamic protocols. These
firewalls generally provide the best speed and transparency; however, they may lack the granular
application level access control or caching that some proxies support. Firewalls, of one type or
another, have become an integral part of standard security solutions for enterprises.
About the NBG4104 Firewall
The NBG4104’s firewall feature physically separates the LAN and the WAN and acts as a secure
gateway for all data passing between the networks.
It is a stateful inspection firewall and is designed to protect against Denial of Service attacks when
activated (click the General tab under Firewall and then click the Enable Firewall check box).
The NBG4104's purpose is to allow a private Local Area Network (LAN) to be securely connected to
the Internet. The NBG4104 can be used to prevent theft, destruction and modification of data, as
well as log events, which may be important to the security of your network.
The NBG4104 is installed between the LAN and a broadband modem connecting to the Internet.
This allows it to act as a secure gateway for all data passing between the Internet and the LAN.
The NBG4104 has one Ethernet WAN port and four Ethernet LAN ports, which are used to physically
separate the network into two areas.The WAN (Wide Area Network) port attaches to the broadband
(cable or DSL) modem to the Internet.
The LAN (Local Area Network) port attaches to a network of computers, which needs security from
the outside world. These computers will have access to Internet services such as e-mail, and the
World Wide Web. However, "inbound access" is not allowed (by default) unless the remote host is
authorized to use a specific service.
Guidelines For Enhancing Security With Your Firewall
112
Change the default password via Web Configurator.
NBG4104 User’s Guide
Chapter 18 Firewall
Think about access control before you connect to the network in any way, including attaching a
modem to the port.
Limit who can access your router.
Don't enable any local service (such as NTP) that you don't use. Any enabled service could present
a potential security risk. A determined hacker might be able to find creative ways to misuse the
enabled services to access the firewall or the network.
For local services that are enabled, protect against misuse. Protect by configuring the services to
communicate only with specific peers, and protect by configuring rules to block packets for the
services at specific interfaces.
Protect against IP spoofing by making sure the firewall is active.
Keep the firewall in a secured (locked) room.
18.4 The Firewall General Screen
Use this screen to enable or disable the NBG4104’s firewall, and set up firewall logs. Click
Configuration > Security > Firewall to open the General screen.
Figure 57 Configuration > Security > Firewall > General l
The following table describes the labels in this screen.
Table 44 Configuration > Security > Firewall > General
LABEL
DESCRIPTION
Enable Firewall
Select this check box to activate the firewall. The NBG4104 performs access control and
protects against Denial of Service (DoS) attacks when the firewall is activated.
Enable Anti-DoS
Attack
Select this check box to activate the Anti-Dos Attack function.
Apply
Click Apply to save the settings.
Reset
Click Reset to start configuring this screen again.
NBG4104 User’s Guide
113
Chapter 18 Firewall
18.5 The Access Control Rule Screen
Click Configuration > Security > Firewall > Access Control Rule to display the following
screen. This screen displays a list of the configured access control rules.
Figure 58 Configuration > Security > Firewall > Access Control Rule
The following table describes the labels in this screen.
Table 45 Configuration > Security > Firewall > Access Control Rule
LABEL
DESCRIPTION
Application Rules Summary
Packet Direction
Select the direction of traffic (WAN to LAN or WAN to WAN) to which this rule
applies.
Firewall Rule
This is your firewall rule number. The ordering of your rules is important as rules are
applied in turn.
Name
This displays the name of the rule.
Source MAC
This is the source MAC address of the rule.
Dest IP
This column displays the destination addresses to which this firewall rule applies.
Source IP
This column displays the source addresses to which this firewall rule applies.
Protocol
This displays the IP port that defines your customized port.
Dest. Port Range
This column displays the port number or the range of port numbers of the destination.
Source Port Range
This column displays the port number or the range of port numbers of the source.
Action
This field displays whether the rule silently discards packets (Drop) or allows the
passage of packets (Allow).
Delete
Click the Edit icon to display and modify an existing firewall rule setting.
Click the Remove icon to delete a firewall rule.
114
NBG4104 User’s Guide
Chapter 18 Firewall
Table 45 Configuration > Security > Firewall > Access Control Rule (continued)
LABEL
DESCRIPTION
Apply
Click Apply to save the settings.
Reset
Click Reset to start configuring this screen again.
18.5.1 Access Control Rule Edit
Click the Edit icon next to a firewall rule in the Access Control Rule screen. The following screen
is displayed. You can use this screen to modify a rule.
Figure 59 Access Control Rule: Edit
The following table describes the labels in this screen.
Table 46 Access Control Rule: Edit
LABEL
DESCRIPTION
Rule Name
Enter a descriptive name for the rule.
Source MAC
Enter the source MAC address of the rule.
Dest IP
Enter the destination addresses to which this rule applies.
Source IP
Enter the source addresses to which this rule applies.
Protocol Type
Choose the IP port (TCP, UDP, or ICMP) that defines your customized port from the
drop-down list box.
If you do not want to configure the IP port, select None.
Dest. Port Range
Enter the port number or the range of port numbers of the destination.
Source Port Range
Enter the port number or the range of port numbers of the source.
Action
Select the action for the rule:
•
•
Drop: silently discards packets.
Allow: allows the passage of packets.
Apply
Click Apply to save the settings.
Reset
Click Reset to start configuring this screen again.
See Appendix F on page 227 for commonly used services and port numbers.
NBG4104 User’s Guide
115
Chapter 18 Firewall
18.6 The Services Screen
If an outside user attempts to probe an unsupported port on your NBG4104, an ICMP response
packet is automatically returned. This allows the outside user to know the NBG4104 exists. Use this
screen to prevent the ICMP response packet from being sent. This keeps outsiders from discovering
your NBG4104 when unsupported ports are probed.
Click Configuration > Security > Firewall > Services to display the following screen.
Figure 60 Configuration > Security > Firewall > Services
The following table describes the labels in this screen.
Table 47 Configuration > Security > Firewall > Services
116
LABEL
DESCRIPTION
ICMP
Internet Control Message Protocol is a message control and error-reporting protocol
between a host server and a gateway to the Internet. ICMP uses Internet Protocol (IP)
datagrams, but the messages are processed by the TCP/IP software and directly
apparent to the application user.
Respond to Ping on
The NBG4104 will not respond to any incoming Ping requests when Disable is selected.
Select LAN to reply to incoming LAN Ping requests. Select WAN to reply to incoming
WAN Ping requests. Otherwise select LAN & WAN to reply to all incoming LAN and
WAN Ping requests.
Apply
Click Apply to save the settings.
Reset
Click Reset to start configuring this screen again.
NBG4104 User’s Guide
C HAPTER
19
Content Filtering
19.1 Overview
This chapter provides a brief overview of content filtering using the embedded web GUI.
Internet content filtering allows you to create and enforce Internet access policies tailored to your
needs. Content filtering is the ability to block certain web features or specific URL keywords.
19.2 What You Need To Know
The following terms and concepts may help as you read through this chapter.
Content Filtering Profiles
Content filtering allows you to block certain web features, such as cookies, and/or block access to
specific web sites. For example, you can configure one policy that blocks John Doe’s access to arts
and entertainment web pages.
A content filtering profile conveniently stores your custom settings for the following features.
Keyword Blocking URL Checking
The NBG4104 checks the URL’s domain name (or IP address) and file path separately when
performing keyword blocking.
The URL’s domain name or IP address is the characters that come before the first slash in the URL.
For example, with the URL www.zyxel.com.tw/news/pressroom.php, the domain name is
www.zyxel.com.tw.
The file path is the characters that come after the first slash in the URL. For example, with the URL
www.zyxel.com.tw/news/pressroom.php, the file path is news/pressroom.php.
Since the NBG4104 checks the URL’s domain name (or IP address) and file path separately, it will
not find items that go across the two. For example, with the URL www.zyxel.com.tw/news/
pressroom.php, the NBG4104 would find “tw” in the domain name (www.zyxel.com.tw). It would
also find “news” in the file path (news/pressroom.php) but it would not find “tw/news”.
NBG4104 User’s Guide
117
Chapter 19 Content Filtering
19.3 Content Filter
Use this screen to restrict web features, add keywords for blocking and designate a trusted
computer. Click Configuration > Security > Content Filter to open the Content Filter screen.
Figure 61 Configuration > Security > Content Filter
The following table describes the labels in this screen.
Table 48 Configuration > Security > Content Filter
LABEL
DESCRIPTION
Trusted Computer
IP Address
To enable this feature, type an IP address of any one of the computers in your network
that you want to have as a trusted computer. This allows the trusted computer to have
full access to all features that are configured to be blocked by content filtering.
Leave this field blank to have no trusted computers.
Restrict Web
Features
118
Select the box(es) to restrict a feature. When you download a page containing a
restricted feature, that part of the web page will appear blank or grayed out.
ActiveX
A tool for building dynamic and active Web pages and distributed object applications.
When you visit an ActiveX Web site, ActiveX controls are downloaded to your browser,
where they remain in case you visit the site again.
Java
A programming language and development environment for building downloadable Web
components or Internet and intranet business applications of all kinds.
Cookies
Used by Web servers to track usage and provide service based on ID.
Web Proxy
A server that acts as an intermediary between a user and the Internet to provide
security, administrative control, and caching service. When a proxy server is located on
the WAN it is possible for LAN users to circumvent content filtering by pointing to this
proxy server.
NBG4104 User’s Guide
Chapter 19 Content Filtering
Table 48 Configuration > Security > Content Filter (continued)
LABEL
DESCRIPTION
Enable URL
Keyword Blocking
The NBG4104 can block Web sites with URLs that contain certain keywords in the
domain name or IP address. For example, if the keyword "bad" was enabled, all sites
containing this keyword in the domain name or IP address will be blocked, e.g., URL
http://www.website.com/bad.html would be blocked. Select this check box to enable
this feature.
Keyword
Type a keyword in this field. You may use any character (up to 64 characters).
Wildcards are not allowed. You can also enter a numerical IP address.
Add
Click Add after you have typed a keyword.
Repeat this procedure to add other keywords. Up to 64 keywords are allowed.
When you try to access a web page containing a keyword, you will get a message
telling you that the content filter is blocking this request.
Keyword List
This list displays the keywords already added.
Delete
Highlight a keyword in the lower box and click Delete to remove it. The keyword
disappears from the text box after you click Apply.
Clear All
Click this button to remove all of the listed keywords.
Apply
Click Apply to save your changes.
Reset
Click Reset to begin configuring this screen afresh
19.4 Technical Reference
The following section contains additional technical information about the NBG4104 features
described in this chapter.
19.4.1 Customizing Keyword Blocking URL Checking
You can use commands to set how much of a website’s URL the content filter is to check for
keyword blocking. See the appendices for information on how to access and use the command
interpreter.
Domain Name or IP Address URL Checking
By default, the NBG4104 checks the URL’s domain name or IP address when performing keyword
blocking.
This means that the NBG4104 checks the characters that come before the first slash in the URL.
For example, with the URL www.zyxel.com.tw/news/pressroom.php, content filtering only searches
for keywords within www.zyxel.com.tw.
Full Path URL Checking
Full path URL checking has the NBG4104 check the characters that come before the last slash in the
URL.
For example, with the URL www.zyxel.com.tw/news/pressroom.php, full path URL checking
searches for keywords within www.zyxel.com.tw/news/.
NBG4104 User’s Guide
119
Chapter 19 Content Filtering
Use the ip urlfilter customize actionFlags 6 [disable | enable] command to extend (or
not extend) the keyword blocking search to include the URL's full path.
File Name URL Checking
Filename URL checking has the NBG4104 check all of the characters in the URL.
For example, filename URL checking searches for keywords within the URL www.zyxel.com.tw/
news/pressroom.php.
Use the ip urlfilter customize actionFlags 8 [disable | enable] command to extend (or
not extend) the keyword blocking search to include the URL's complete filename.
120
NBG4104 User’s Guide
C HAPTER
20
Remote Management
20.1 Overview
This chapter provides information on the Remote Management screens.
Remote Management allows you to manage your NBG4104 from a remote location through the
following interfaces:
• LAN and WAN
• LAN only
Note: The NBG4104 is managed using the Web Configurator.
20.2 What You Need to Know
Remote management over LAN or WAN will not work when:
The IP address in the Secured Client IP Address field (Section 20.4 on page 122) does not match
the client IP address. If it does not match, the NBG4104 will disconnect the session immediately.
There is already another remote management session. You may only have one remote
management session running at one time.
There is a firewall rule that blocks it.
20.2.1 Remote Management and NAT
When NAT is enabled:
• Use the NBG4104’s WAN IP address when configuring from the WAN.
• Use the NBG4104’s LAN IP address when configuring from the LAN.
20.3 What You Can Do
• Use the WWW screen to configure through which interface(s) and from which IP address(es)
users can use HTTP or HTTPs to manage the NBG4104 (Section 20.4 on page 122).
• Use the Telnet screen to configure through which interface(s) and from which IP address(es)
users can use Telnet to manage the NBG4104 (Section 20.5 on page 123).
NBG4104 User’s Guide
121
Chapter 20 Remote Management
• Use the FTP screen to configure through which interface(s) and from which IP address(es) users
can use to access the NBG4104 (Section 20.6 on page 124).
• Your NBG4104 can act as an SNMP agent, which allows a manager station to manage and
monitor the NBG4104 through the network. Use the SNMP screen to configure SNMP settings.
You can also specify from which IP addresses the access can come (Section 20.7 on page 124).
• Use the TR069 screen to configure the NBG4104’s TR-069 auto-configuration settings (Section
20.8 on page 127).
• Use the Import CA screen to import CA certificates to the NBG4104 (Section 20.9 on page 128).
20.4 The WWW Screen
To change your NBG4104’s remote management settings, click Configuration > Management >
Remote MGMT to open the WWW screen.
Figure 62 Configuration > Management > Remote MGMT > WWW
The following table describes the labels in this screen.
Table 49 Configuration > Management > Remote MGMT > WWW
LABEL
DESCRIPTION
HTTPS
Server Port
You may change the server port number for a HTTPS service if needed. However you
must use the same port number in order to use that service for remote management.
Server Access
Select the interface(s) through which a computer may access the NBG4104 using this
HTTPS service.
Secured Client IP
Address
Select All to allow all computers to access the NBG4104.
Otherwise, check Selected and specify the IP address of the computer that can access
the NBG4104.
HTTP
122
Server Port
You may change the server port number for a HTTP service if needed. However you
must use the same port number in order to use that service for remote management.
Server Access
Select the interface(s) through which a computer may access the NBG4104 using this
HTTP service.
NBG4104 User’s Guide
Chapter 20 Remote Management
Table 49 Configuration > Management > Remote MGMT > WWW (continued)
LABEL
DESCRIPTION
Secured Client IP
Address
Select All to allow all computers to access the NBG4104.
Apply
Click Apply to save your customized settings and exit this screen.
Reset
Click Reset to begin configuring this screen afresh.
Otherwise, check Selected and specify the IP address of the computer that can access
the NBG4104.
20.5 The Telnet Screen
You can use Telnet to access the NBG4104’s command line interface. Specify which interfaces allow
Telnet access and from which IP address the access can come.
Click Configuration > Management > Remote MGMT > Telnet to display the screen as shown.
Figure 63 Configuration > Management > Remote MGMT > Telnet
The following table describes the labels in this screen.
Table 50 Configuration > Management > Remote MGMT > Telnet
LABEL
DESCRIPTION
TELNET
Server 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.
Server Access
Select the interface(s) through which a computer may access the NBG4104 using this
service.
Secured Client IP
Address
Select All to allow all computers to access the NBG4104.
Apply
Click Apply to save your customized settings and exit this screen.
Reset
Click Reset to begin configuring this screen afresh.
NBG4104 User’s Guide
Otherwise, check Selected and specify the IP address of the computer that can access
the NBG4104.
123
Chapter 20 Remote Management
20.6 The FTP Screen
Use this screen to specify which interfaces allow access and from which IP address the access can
come. To change your NBG4604’s settings, click Configuration > Management > Remote
MGMT > to display the screen as shown.
Figure 64 Configuration > Management > Remote MGMT > FTP
The following table describes the labels in this screen.
Table 51 Configuration > Management > Remote MGMT > FTP
LABEL
DESCRIPTION
Server 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.
Server Access
Select the interface(s) through which a computer may access the NBG4104 using this
service.
Secured Client IP
Address
Select All to allow all computers to access the NBG4104.
Apply
Click Apply to save your customized settings and exit this screen.
Reset
Click Reset to begin configuring this screen afresh.
Otherwise, check Selected and specify the IP address of the computer that can access
the NBG4104.
20.7 The SNMP Screen
Simple Network Management Protocol is a protocol used for exchanging management information
between network devices. Your NBG4104 supports SNMP agent functionality, which allows a
manager station to manage and monitor the NBG4104 through the network. The NBG4104
124
NBG4104 User’s Guide
Chapter 20 Remote Management
supports SNMP version one (SNMPv1) and version two (SNMPv2c). The next figure illustrates an
SNMP management operation.
Figure 65 SNMP Management Model
An 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 NBG4104). 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.
The managed devices contain object variables/managed objects that define each piece of
information to be collected about a device. Examples of variables include such as number of
packets received, node port status etc. A Management Information Base (MIB) is a collection of
managed objects. SNMP allows a manager and agents to communicate for the purpose of accessing
these objects.
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.
NBG4104 User’s Guide
125
Chapter 20 Remote Management
To change your NBG4104’s SNMP settings, click Configuration > Management > Remote MGMT
> SNMP to display the screen as shown.
Figure 66 Configuration > Management > Remote MGMT > SNMP
The following table describes the labels in this screen.
Table 52 Configuration > Management > Remote MGMT > SNMP
LABEL
DESCRIPTION
SNMP Settings
Server Port
The SNMP agent listens on port 161 by default. If you change the SNMP server port to a
different number on the NBG4104, for example 8161, then you must notify people who
need to access the NBG4104 SNMP agent to use the same port.
Server Access
Select the interface(s) through which a computer may access the NBG4104 using this
service.
Secured Client IP
Address
Select All to allow all computers to access the NBG4104.
Otherwise, check Selected and specify the IP address of the computer that can access
the NBG4104.
SNMP Settings
Enable SNMP
Select this to enable SNMP on this device.
Get Community
Enter the SNMP get community information here.
Set Community
Enter the SNMP set community information here.
System Location
Enter the SNMP system location.
System Contact
Enter the SNMP system contact.
Trap Settings
126
Trap Settings
Select this to enable trap settings on this device.
Trap Manager IP
Type the IP address of the station to send your SNMP traps to.
Trap Community
Type the trap community, which is the password sent with each trap to the SNMP
manager. The default is public and allows all requests.
NBG4104 User’s Guide
Chapter 20 Remote Management
Table 52 Configuration > Management > Remote MGMT > SNMP (continued)
LABEL
DESCRIPTION
Apply
Click Apply to save your customized settings and exit this screen.
Reset
Click Reset to begin configuring this screen afresh.
20.8 The TR069 Screen
TR-069 defines how Customer Premise Equipment (CPE), for example your ZyXEL Device, can be
managed over the WAN by an Auto Configuration Server (ACS). TR-069 is based on sending
Remote Procedure Calls (RPCs) between an ACS and a client device. RPCs are sent in Extensible
Markup Language (XML) format over HTTP or HTTPS.
An administrator can use an ACS to remotely set up the NBG4104, modify settings, perform
firmware upgrades as well as monitor and diagnose the NBG4104. You have to enable the device to
be managed by the ACS and specify the ACS IP address or domain name and username and
password.
Click Configuration > Management > Remote MGMT > TR069 to display the screen as shown.
Use this screen to configure your NBG4104 to be managed by an ACS.
Figure 67 Configuration > Management > Remote MGMT > TR069
The following table describes the labels in this screen.
Table 53 Configuration > Management > Remote MGMT > TR069
LABEL
DESCRIPTION
TR069 Client
Inform
Select Enable for the NBG4104 to send periodic inform via TR-069 on the WAN.
Otherwise, select Disable.
Inform Interval
Enter the time interval (in seconds) at which the NBG4104 sends information to the
auto-configuration server.
ACS URL
Enter the URL or IP address of the auto-configuration server.
ACS Username
Enter the TR-069 user name for authentication with the auto-configuration server.
ACS Password
Enter the TR-069 password for authentication with the auto-configuration server.
NBG4104 User’s Guide
127
Chapter 20 Remote Management
Table 53 Configuration > Management > Remote MGMT > TR069 (continued)
LABEL
DESCRIPTION
Connection Request
Username
Enter the connection request user name.
Connection Request
Password
Enter the connection request password.
Apply
Click Apply to save your customized settings and exit this screen.
Reset
Click Reset to begin configuring this screen afresh.
When the ACS makes a connection request to the NBG4104, this user name is used to
authenticate the ACS.
When the ACS makes a connection request to the NBG4104, this password is used to
authenticate the ACS.
20.9 The Import CA Screen
The NBG4104 can use certificates (also called digital IDs) to authenticate users. Certificates are
based on public-private key pairs. A certificate contains the certificate owner’s identity and public
key. Certificates provide a way to exchange public keys for use in authentication.
Click Configuration > Management > Remote MGMT > Import CA to open the following. You
can view or import a certificate in this screen.
Figure 68 Configuration > Management > Remote MGMT > Import CA
128
NBG4104 User’s Guide
Chapter 20 Remote Management
The following table describes the labels in this screen.
Table 54 Configuration > Management > Remote MGMT > Import CA
LABEL
DESCRIPTION
Import CA
Certificate
You can view the details of a certificate that is already imported.
Apply
Click Apply to save your customized settings and exit this screen.
Reset
Click Reset to begin configuring this screen afresh.
NBG4104 User’s Guide
If you want to change it, you can delete the old certificate and copy the new certificate
of a certification authority that you trust and paste it in the space between BEGIN
CERTIFICATE and END CERTIFICATE.
129
C HAPTER
21
Bandwidth Management
21.1 Overview
This chapter contains information about configuring bandwidth management and editing rules.
ZyXEL’s Bandwidth Management allows you to specify bandwidth management rules based on an
application.
In the figure below, uplink traffic goes from the LAN device (A) to the WAN device (B). Bandwidth
management is applied before sending the packets out to the WAN.
Figure 69 Bandwidth Management
Uplink
Bandwidth
MGMT
You can allocate specific amounts of bandwidth capacity (bandwidth budgets) to individual
applications (like VoIP, Web, and E-mail for example).
21.2 What You Can Do
• Use the General screen to enable bandwidth management and assign uplink limits (Section 21.4
on page 131).
• Use the Advanced screen to configure bandwidth management rules for the pre-defined services
and applications (Section 21.5 on page 132).
21.3 What You Need To Know
The following terms and concepts may help as you read through this chapter.
NBG4104 User’s Guide
130
Chapter 21 Bandwidth Management
Bandwidth Limiting
You can limit an application’s uplink bandwidth. This limit keeps the traffic from using up too much
of the out-going interface’s bandwidth. This way you can make sure there is bandwidth for other
applications. Use the following guidelines:
• The sum of the bandwidth allotments that apply to the WAN interface (LAN to WAN, WLAN to
WAN) must be less than or equal to the Uplink value that you configure in the Bandwidth
Management General screen.
21.4 The Bandwidth MGMT General Screen
Use this screen to enable bandwidth management and assign uplink limits. You can use either one
of the following types:
• Priority Queue. Enable bandwidth management to give uplink traffic that matches a bandwidth
rule priority over traffic that does not match a bandwidth rule. (This type does not apply to
downlink traffic.)
• Bandwidth Allocation. Enabling bandwidth management also allows you to control the
maximum or minimum amounts of bandwidth that can be used by traffic that matches a
bandwidth rule.
Note: You cannot apply both bandwidth management types at the same time.
Click Configuration > Management > Bandwidth MGMT to open the bandwidth management
General screen.
Figure 70 Configuration > Management > Bandwidth MGMT > General
NBG4104 User’s Guide
131
Chapter 21 Bandwidth Management
The following table describes the labels in this screen.
Table 55 Configuration > Management > Bandwidth MGMT > General
LABEL
DESCRIPTION
Service Management
Bandwidth
Management
Type
This field allows you to have NBG4104 apply bandwidth management.
Select Disable if you do not want to use this feature.
Select Priority Queue to allocate bandwidth based on the pre-defined priority assigned to
an application. Refer to Section 21.5 on page 132.
Select Bandwidth Allocation allocate specific amounts of bandwidth to specific protocols
on an IP or IP range. Refer to Section 21.5 on page 132.
Total Bandwidth
Upstream
Select the total amount of bandwidth (from 32kbps to 100mbps) that you want to dedicate
to upstream traffic.
Apply
Click Apply to save your customized settings.
Reset
Click Reset to begin configuring this screen afresh.
21.5 The Bandwidth MGMT Advanced Screen
Use this screen to configure bandwidth managements rule for specific protocols on an IP or IP
range.
Note: This screen contains the Priority Queue and Bandwidth Allocation tables.
Though both tables are described in this section, you can only apply the rules in one
table. Fill out the table of the Bandwidth Management Type you selected in the
Bandwidth MGMT General screen.
132
NBG4104 User’s Guide
Chapter 21 Bandwidth Management
Click Configuration > Management > Bandwidth MGMT > Advanced to open the bandwidth
management Advanced screen.
Figure 71 Configuration > Management > Bandwidth MGMT > Advanced
The following table describes the labels in this screen.
Table 56 Configuration > Management > Bandwidth MGMT > Advanced
LABEL
DESCRIPTION
Priority Queue
This is the number of an individual bandwidth management rule.
Enable
A yellow bulb indicates this rule is active. A gray bulb indicates it is disabled.
Service Name
Enter the name of the service.
You can also enter the name (up to 10 keyboard characters) of a service you want to add in
the priority queue (for example, Messenger).
Priority
NBG4104 User’s Guide
Select a priority from the drop down list box. Choose from 1 to 4 (1 is the highest).
133
Chapter 21 Bandwidth Management
Table 56 Configuration > Management > Bandwidth MGMT > Advanced (continued)
LABEL
DESCRIPTION
Specific Port
Select the port/s assigned to the service.
You can also specify the port/s to services to which you want to allocate bandwidth. Choose
either TCP&UDP, TCP or UDP in the drop-down menu and enter the port or range of ports
in the provided boxes.
Note: If you are entering a specific port and not a range of ports, you can either leave the
second port field blank or enter the same port number again.
Bandwidth
Allocation
Use this table to allocate specific amounts of bandwidth to specific protocols on an IP or IP
range.
This is the number of an individual bandwidth management rule.
Enable
A yellow bulb indicates this rule is active. A gray bulb indicates it is disabled.
LAN IP Range
This displays the range of IP addresses for which the bandwidth management rule applies.
Port Range
This displays the range of ports for which the bandwidth management rule applies.
Rate Limit
This is the maximum or minimum bandwidth allowed (refer to the field above) for the rule in
bits per second.
Modify
Click the Edit icon to open the Bandwidth Allocation Edit screen. Modify an existing rule
or create a new rule in this screen. See Section 21.5.1 on page 134 for more information.
Click the Delete icon to delete a rule.
Apply
Click Apply to save your customized settings.
Reset
Click Reset to begin configuring this screen afresh.
21.5.1 User Defined Service Rule Configuration
If you want to edit a bandwidth management rule for specific protocols on an IP or IP range, click
the Edit icon in the Bandwidth Allocation table of the Advanced screen. The following screen
displays.
Figure 72 Advanced: Bandwidth Allocation Edit
The following table describes the labels in this screen.
Table 57 Advanced: Bandwidth Allocation Edit
134
LABEL
DESCRIPTION
Active
Select this check box to turn on this bandwidth management rule.
LAN IP Range
Specify the range of IP addresses for which the bandwidth management rule applies.
Protocol
Select the protocol (TCP&UDP, TCP, or UDP) for which the bandwidth management rule
applies.
NBG4104 User’s Guide
Chapter 21 Bandwidth Management
Table 57 Advanced: Bandwidth Allocation Edit (continued)
LABEL
DESCRIPTION
Port Range
Enter the range of ports for which the bandwidth management rule applies.
Max Rate (bps)
Select the maximum bandwidth allowed for the rule in bits per second from the drop-list.
Otherwise, select User Defined and enter the rate manually.
Apply
Click Apply to save your customized settings.
Reset
Click Reset to reload the previous configuration for this screen.
Cancel
Click Cancel to begin configuring this screen afresh.
21.5.2 Services and Port Numbers
See Appendix F on page 227 for commonly used services and port numbers.
NBG4104 User’s Guide
135
C HAPTER
22
Universal Plug-and-Play (UPnP)
22.1 Overview
This chapter introduces the UPnP feature in the web configurator.
Universal Plug and Play (UPnP) is a distributed, open networking standard that uses TCP/IP for
simple peer-to-peer network connectivity between devices. A UPnP device can dynamically join a
network, obtain an IP address, convey its capabilities and learn about other devices on the network.
In turn, a device can leave a network smoothly and automatically when it is no longer in use.
22.2 What You Need to Know
UPnP hardware is identified as an icon in the Network Connections folder (Windows XP). Each UPnP
compatible device installed on your network will appear as a separate icon. Selecting the icon of a
UPnP device will allow you to access the information and properties of that device.
22.2.1 NAT Traversal
UPnP NAT traversal automates the process of allowing an application to operate through NAT. UPnP
network devices can automatically configure network addressing, announce their presence in the
network to other UPnP devices and enable exchange of simple product and service descriptions.
NAT traversal allows the following:
• Dynamic port mapping
• Learning public IP addresses
• Assigning lease times to mappings
Windows Messenger is an example of an application that supports NAT traversal and UPnP.
See the NAT chapter for more information on NAT.
22.2.2 Cautions with UPnP
The automated nature of NAT traversal applications in establishing their own services and opening
firewall ports may present network security issues. Network information and configuration may also
be obtained and modified by users in some network environments.
When a UPnP device joins a network, it announces its presence with a multicast message. For
security reasons, the NBG4104 allows multicast messages on the LAN only.
NBG4104 User’s Guide
136
Chapter 22 Universal Plug-and-Play (UPnP)
All UPnP-enabled devices may communicate freely with each other without additional configuration.
Disable UPnP if this is not your intention.
22.3 UPnP Screen
Use this screen to enable UPnP on your NBG4104.
Click Configuration > Management > UPnP to display the screen shown next.
Figure 73 Configuration > Management > UPnP
The following table describes the fields in this screen.
Table 58 Configuration > Management > UPnP
LABEL
DESCRIPTION
Enable the
Universal Plug
and Play
(UPnP) Feature
Select this check box to activate UPnP. Be aware that anyone could use a UPnP application to
open the web configurator's login screen without entering the NBG4104's IP address
(although you must still enter the password to access the web configurator).
Apply
Click Apply to save the setting to the NBG4104.
Reset
Click Reset to return to the previously saved settings.
22.4 Technical Reference
The sections show examples of using UPnP.
22.4.1 Using UPnP in Windows XP Example
This section shows you how to use the UPnP feature in Windows XP. You must already have UPnP
installed in Windows XP and UPnP activated on the NBG4104.
Make sure the computer is connected to a LAN port of the NBG4104. Turn on your computer and
the NBG4104.
22.4.1.1 Auto-discover Your UPnP-enabled Network Device
Click start and Control Panel. Double-click Network Connections. An icon displays under
Internet Gateway.
NBG4104 User’s Guide
137
Chapter 22 Universal Plug-and-Play (UPnP)
Right-click the icon and select Properties.
Figure 74 Network Connections
In the Internet Connection Properties window, click Settings to see the port mappings there
were automatically created.
Figure 75 Internet Connection Properties
138
NBG4104 User’s Guide
Chapter 22 Universal Plug-and-Play (UPnP)
You may edit or delete the port mappings or click Add to manually add port mappings.
Figure 76 Internet Connection Properties: Advanced Settings
Figure 77 Internet Connection Properties: Advanced Settings: Add
Note: When the UPnP-enabled device is disconnected from your computer, all port
mappings will be deleted automatically.
Select Show icon in notification area when connected option and click OK. An icon displays in
the system tray.
Figure 78 System Tray Icon
NBG4104 User’s Guide
139
Chapter 22 Universal Plug-and-Play (UPnP)
Double-click on the icon to display your current Internet connection status.
Figure 79 Internet Connection Status
22.4.2 Web Configurator Easy Access
With UPnP, you can access the web-based configurator on the NBG4104 without finding out the IP
address of the NBG4104 first. This comes helpful if you do not know the IP address of the
NBG4104.
Follow the steps below to access the web configurator.
140
Click Start and then Control Panel.
Double-click Network Connections.
NBG4104 User’s Guide
Chapter 22 Universal Plug-and-Play (UPnP)
Select My Network Places under Other Places.
Figure 80 Network Connections
An icon with the description for each UPnP-enabled device displays under Local Network.
Right-click on the icon for your NBG4104 and select Invoke. The web configurator login screen
displays.
Figure 81 Network Connections: My Network Places
NBG4104 User’s Guide
141
Chapter 22 Universal Plug-and-Play (UPnP)
Right-click on the icon for your NBG4104 and select Properties. A properties window displays with
basic information about the NBG4104.
Figure 82 Network Connections: My Network Places: Properties: Example
142
NBG4104 User’s Guide
C HAPTER
23
Maintenance
23.1 Overview
This chapter provides information on the Maintenance screens.
23.2 What You Can Do
• Use the General screen to set the timeout period of the management session (Section 23.3 on
page 143).
• Use the Password screen to change your NBG4104’s system password (Section 23.4 on page
144).
• Use the Time screen to change your NBG4104’s time and date (Section 23.5 on page 145).
• Use the Firmware Upgrade screen to upload firmware to your NBG4104 (Section 23.6 on page
146).
• Use the Backup/Restore screen to view information related to factory defaults, backup
configuration, and restoring configuration (Section 23.8 on page 148).
• Use the Restart screen to reboot the NBG4104 without turning the power off (Section 23.8 on
page 148).
• Use the Sys OP Mode screen to select how you want to use your NBG4104 (Section 23.10 on
page 150).
23.3 General Screen
Use this screen to set the management session timeout period. Click Maintenance > General.
The following screen displays.
Figure 83 Maintenance > General
NBG4104 User’s Guide
143
Chapter 23 Maintenance
The following table describes the labels in this screen.
Table 59 Maintenance > General
LABEL
DESCRIPTION
System Name
System Name is a unique name to identify the NBG4104 in an Ethernet network.
Domain Name
Enter the domain name you want to give to the NBG4104.
Administrator
Inactivity Timer
Type how many minutes a management session can be left idle before the session times
out. The default is 5 minutes. After it times out you have to log in with your password again.
Very long idle timeouts may have security risks. A value of "0" means a management
session never times out, no matter how long it has been left idle (not recommended).
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to begin configuring this screen afresh.
23.4 Password Screen
It is strongly recommended that you change your NBG4104's password.
If you forget your NBG4104's password (or IP address), you will need to reset the device. See
Section 23.8 on page 148 for details.
Click Maintenance > Password. The screen appears as shown.
Figure 84 Maintenance > Password
The following table describes the labels in this screen.
Table 60 Maintenance > Password
144
LABEL
DESCRIPTION
Old Password
Type the default password or the existing password you use to access the system in this
field.
New Password
Type your new system password (up to 30 characters). Note that as you type a password,
the screen displays an asterisk (*) for each character you type.
Retype to
Confirm
Type the new password again in this field.
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to begin configuring this screen afresh.
NBG4104 User’s Guide
Chapter 23 Maintenance
23.5 Time Setting Screen
Use this screen to configure the NBG4104’s time based on your local time zone. To change your
NBG4104’s time and date, click Maintenance > Time. The screen appears as shown.
Figure 85 Maintenance > Time
The following table describes the labels in this screen.
Table 61 Maintenance > Time
LABEL
DESCRIPTION
Current Time and Date
Current Time
This field displays the time of your NBG4104.
Each time you reload this page, the NBG4104 synchronizes the time with the time server.
Current Date
This field displays the date of your NBG4104.
Each time you reload this page, the NBG4104 synchronizes the date with the time server.
Current Time and Date
Manual
Select this radio button to enter the time and date manually. If you configure a new time
and date, Time Zone and Daylight Saving at the same time, the new time and date you
entered has priority and the Time Zone and Daylight Saving settings do not affect it.
New Time
This field displays the last updated time from the time server or the last time configured
manually.
(hh:mm:ss)
When you select Manual, enter the new time in this field and then click Apply.
New Date
(yyyy/mm/dd)
This field displays the last updated date from the time server or the last date configured
manually.
When you select Manual, enter the new date in this field and then click Apply.
Get from Time
Server
NBG4104 User’s Guide
Select this radio button to have the NBG4104 get the time and date from the time server
you specified below.
145
Chapter 23 Maintenance
Table 61 Maintenance > Time (continued)
LABEL
DESCRIPTION
Auto
Select Auto to have the NBG4104 automatically search for an available time server and
synchronize the date and time with the time server after you click Apply.
User Defined
Time Server
Address
Select User Defined Time Server Address and enter the IP address or URL (up to 20
extended ASCII characters in length) of your time server. Check with your ISP/network
administrator if you are unsure of this information.
Time Zone Setup
Time Zone
Choose the time zone of your location. This will set the time difference between your time
zone and Greenwich Mean Time (GMT).
Apply
Click Apply to save your changes back to the NBG4104.
Reset
Click Reset to begin configuring this screen afresh.
23.6 Firmware Upgrade Screen
Find firmware at www.zyxel.com in a file that (usually) uses the system model name with a “*.bin”
extension, e.g., “NBG4104.bin”. The upload process uses HTTP (Hypertext Transfer Protocol) and
may take up to two minutes. After a successful upload, the system will reboot.
Click Maintenance > Firmware Upgrade. Follow the instructions in this screen to upload
firmware to your NBG4104.
Figure 86 Maintenance > Firmware Upgrade
The following table describes the labels in this screen.
Table 62 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.
Note: Do not turn off the NBG4104 while firmware upload is in progress!
After you see the Firmware Upload In Process screen, wait two minutes before logging into the
NBG4104 again.
146
NBG4104 User’s Guide
Chapter 23 Maintenance
The NBG4104 automatically restarts in this time causing a temporary network disconnect. In some
operating systems, you may see the following icon on your desktop.
Figure 87 Network Temporarily Disconnected
After two minutes, log in again and check your new firmware version in the Status screen.
If the upload was not successful, an error message appears. Click Return to go back to the
Firmware Upgrade screen.
23.7 Configuration Backup/Restore Screen
Backup configuration allows you to back up (save) the NBG4104’s current configuration to a file on
your computer. Once your NBG4104 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.
Restore configuration allows you to upload a new or previously saved configuration file from your
computer to your NBG4104.
Click Maintenance > Backup/Restore. Information related to factory defaults, backup
configuration, and restoring configuration appears as shown next.
Figure 88 Maintenance > Backup/Restore
NBG4104 User’s Guide
147
Chapter 23 Maintenance
The following table describes the labels in this screen.
Table 63 Maintenance > Backup/Restore
LABEL
DESCRIPTION
Backup
Click Backup to save the NBG4104’s current configuration to your computer.
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.
Note: Do not turn off the NBG4104 while configuration file upload is in progress.
After you see a “configuration upload successful” screen, you must then wait one minute
before logging into the NBG4104 again. The NBG4104 automatically restarts in this time
causing a temporary network disconnect.
If you see an error screen, click Back to return to the Backup/Restore screen.
Reset
Pressing the Reset button in this section clears all user-entered configuration
information and returns the NBG4104 to its factory defaults.
You can also press the RESET button on the rear panel to reset the factory defaults of your
NBG4104. Refer to the chapter about introducing the Web Configurator for more information
on the RESET button.
Note: 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 NBG4104
IP address (192.168.1.2). See Appendix D on page 185 for details on how to set up
your computer’s IP address.
23.8 Restart Screen
System restart allows you to reboot the NBG4104 without turning the power off.
Click Maintenance > Restart to open the following screen.
Figure 89 Maintenance > Restart
Click Restart to have the NBG4104 reboot. This does not affect the NBG4104's configuration.
148
NBG4104 User’s Guide
Chapter 23 Maintenance
23.9 System Operation Mode
The Sys OP Mode (System Operation Mode) function lets you configure your NBG4104 as an
router or access point. You can choose between Router and Access Point Mode depending on
your network topology and the features you require from your device.
The following describes the device modes available in your NBG4104.
Router
A router connects your local network with another network, such as the Internet. The router has
two IP addresses, the LAN IP address and the WAN IP address.
Figure 90 LAN and WAN IP Addresses in Router Mode
Access Point
An access point enabled all ethernet ports to be bridged together and be in the same subnet. To
connect to the Internet, another device, such as a router, is required.
Figure 91 Access Point Mode
NBG4104 User’s Guide
149
Chapter 23 Maintenance
23.10 Sys OP Mode Screen
Use this screen to select how you want to use your NBG4104.
Figure 92 Maintenance > Sys OP Mode
The following table describes the labels in the Sys OP Mode screen.
Table 64 Maintenance > Sys OP Mode
LABEL
DESCRIPTION
System Operation Mode
Router Mode
Select Router Mode if your device routes traffic between a local network and another
network such as the Internet. This mode offers services such as a firewall or bandwidth
management.
You can configure the IP address settings on your WAN port. Contact your ISP or system
administrator for more information on appropriate settings.
Access Point
Select Access Point Mode if your device bridges traffic between clients on the same
network.
•
•
•
•
In Access Point Mode, all Ethernet ports have the same IP address.
All ports on the rear panel of the device are LAN ports, including the port labeled WAN.
There is no WAN port.
The DHCP server on your device is disabled.
The IP address of the device on the local network is set to 192.168.1.2.
Apply
Click Apply to save your settings.
Reset
Click Reset to return your settings to the default (Router).
Note: If you select the incorrect System Operation Mode you may not be able to connect
to the Internet.
150
NBG4104 User’s Guide
C HAPTER
24
Troubleshooting
24.1 Overview
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
• NBG4104 Access and Login
• Internet Access
• Resetting the NBG4104 to Its Factory Defaults
• Wireless Router/AP Troubleshooting
24.2 Power, Hardware Connections, and LEDs
The NBG4104 does not turn on. None of the LEDs turn on.
Make sure you are using the power adaptor or cord included with the NBG4104.
Make sure the power adaptor or cord is connected to the NBG4104 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 NBG4104.
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 1.5 on page 18.
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 NBG4104.
If the problem continues, contact the vendor.
NBG4104 User’s Guide
151
Chapter 24 Troubleshooting
24.3 NBG4104 Access and Login
I don’t know the IP address of my NBG4104.
The default IP address is 192.168.1.1.
If you changed the IP address and have forgotten it, you might get the IP address of the NBG4104
by looking up the IP address of the default gateway for your computer. To do this in most Windows
computers, click Start > Run, enter cmd, and then enter ipconfig. The IP address of the Default
Gateway might be the IP address of the NBG4104 (it depends on the network), so enter this IP
address in your Internet browser.Set your device to Router Mode, login (see the Quick Start Guide
for instructions) and go to the Device Information table in the Status screen. Your NBG4104’s IP
address is available in the Device Information table.
• If the DHCP setting under LAN information is None, your device has a fixed IP address.
• If the DHCP setting under LAN information is Client, then your device receives an IP
address from a DHCP server on the network.
If your NBG4104 is a DHCP client, you can find your IP address from the DHCP server. This
information is only available from the DHCP server which allocates IP addresses on your network.
Find this information directly from the DHCP server or contact your system administrator for more
information.
Reset your NBG4104 to change all settings back to their default. This means your current settings
are lost. See Section 24.5 on page 155 in the Troubleshooting for information on resetting your
NBG4104.
I forgot the username and password.
The default username is admin and password is 1234.
If this does not work, you have to reset the device to its factory defaults. See Section 24.5 on page
155.
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 192.168.1.1.
• If you changed the IP address (Section 11.4 on page 83), use the new IP address.
• If you changed the IP address and have forgotten it, see the troubleshooting suggestions for I
don’t know the IP address of my NBG4104.
152
NBG4104 User’s Guide
Chapter 24 Troubleshooting
Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick
Start Guide.
Make sure your Internet browser does not block pop-up windows and has JavaScript and Java
enabled. See Appendix B on page 163.
Make sure your computer is in the same subnet as the NBG4104. (If you know that there are
routers between your computer and the NBG4104, skip this step.)
• If there is a DHCP server on your network, make sure your computer is using a dynamic IP
address. See Section 11.4 on page 83.
• If there is no DHCP server on your network, make sure your computer’s IP address is in the
same subnet as the NBG4104. See Section 11.4 on page 83.
Reset the device to its factory defaults, and try to access the NBG4104 with the default IP address.
See Section 3.3.1 on page 23.
If the problem continues, contact the network administrator or vendor, or try one of the advanced
suggestions.
Advanced Suggestions
• Try to access the NBG4104 using another service, such as Telnet. If you can access the
NBG4104, check the remote management settings and firewall rules to find out why the
NBG4104 does not respond to HTTP.
• If your computer is connected to the WAN port or 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 NBG4104.
Make sure you have entered the password correctly. The default password is 1234. This field is
case-sensitive, so make sure [Caps Lock] is not on.
You cannot log in to the Web Configurator while someone is using Telnet to access the NBG4104.
Log out of the NBG4104 in the other session, or ask the person who is logged in to log out.
This can happen when you fail to log out properly from your last session. Try logging in again after
5 minutes.
Disconnect and re-connect the power adaptor or cord to the NBG4104.
If this does not work, you have to reset the device to its factory defaults. See Section 24.5 on page
155.
NBG4104 User’s Guide
153
Chapter 24 Troubleshooting
24.4 Internet Access
I cannot access the Internet.
Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick
Start Guide.
If you are trying to access the Internet wirelessly, make sure the wireless settings in the wireless
client are the same as the settings in the AP.
Disconnect all the cables from your device, and follow the directions in the Quick Start Guide again.
Go to Maintenance > Sys OP Mode. Check your Configuration Mode setting.
• Select Router Mode if your device routes traffic between a local network and another network
such as the Internet.
• Select Access Point if your device bridges traffic between clients on the same network.
If the problem continues, contact your ISP.
I cannot access the Internet anymore. I had access to the Internet (with the NBG4104), 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 1.5 on page 18.
Reboot the NBG4104.
If the problem continues, contact your ISP.
The Internet connection is slow or intermittent.
154
There might be a lot of traffic on the network. Look at the LEDs, and check Section 1.5 on page 18.
If the NBG4104 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 strength is low, try moving the NBG4104 closer to the AP if
possible, and look around to see if there are any devices that might be interfering with the wireless
network (for example, microwaves, other wireless networks, and so on).
Reboot the NBG4104.
If the problem continues, contact the network administrator or vendor, or try one of the advanced
suggestions.
NBG4104 User’s Guide
Chapter 24 Troubleshooting
24.5 Resetting the NBG4104 to Its Factory Defaults
If you reset the NBG4104, you lose all of the changes you have made. The NBG4104 re-loads its
default settings, and the password resets to 1234. You have to make all of your changes again.
You will lose all of your changes when you push the RESET button.
To reset the NBG4104:
Make sure the power LED is on.
Press the RESET button for longer than 1 second to restart/reboot the NBG4104.
Press the RESET button for longer than five seconds to set the NBG4104 back to its factory-default
configurations.
If the NBG4104 restarts automatically, wait for the NBG4104 to finish restarting, and log in to the
Web Configurator. The password is 1234.
If the NBG4104 does not restart automatically, disconnect and reconnect the NBG4104’s power.
Then, follow the directions above again.
24.6 Wireless Router/AP Troubleshooting
I cannot access the NBG4104 or ping any computer from the WLAN (wireless AP or router).
Make sure the wireless LAN is enabled on the NBG4104.
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 NBG4104.
Make sure your computer (with a wireless adapter installed) is within the transmission range of the
NBG4104.
Check that both the NBG4104 and your wireless station are using the same wireless and wireless
security settings.
Make sure traffic between the WLAN and the LAN is not blocked by the firewall on the NBG4104.
Make sure you allow the NBG4104 to be remotely accessed through the WLAN interface. Check
your remote management settings.
• See the chapter on Wireless LAN in the User’s Guide for more information.
NBG4104 User’s Guide
155
Chapter 24 Troubleshooting
I set up URL keyword blocking, but I can still access a website that should be blocked.
Make sure that you select the Enable URL Keyword Blocking check box in the Content Filtering
screen. Make sure that the keywords that you type are listed in the Keyword List.
If a keyword that is listed in the Keyword List is not blocked when it is found in a URL, customize
the keyword blocking using commands. See the Customizing Keyword Blocking URL Checking
section in the Content Filtering chapter.
I can access the Internet, but I cannot open my network folders.
Make sure your account has access rights to the folder you are trying to open.
I cannot access the Web Configurator after I switched to AP mode.
When you change from router mode to AP mode, your computer must have an IP address in the
range between “192.168.1.3” and “192.168.1.254”.
Refer to Appendix D on page 185 for instructions on how to change your computer’s IP address.
What factors may cause intermittent or unstabled wireless connection? How can I solve this
problem?
The following factors may cause interference:
• Obstacles: walls, ceilings, furniture, and so on.
• Building Materials: metal doors, aluminum studs.
• Electrical devices: microwaves, monitors, electric motors, cordless phones, and other wireless
devices.
To optimize the speed and quality of your wireless connection, you can:
• Move your wireless device closer to the AP if the signal strength is low.
• Reduce wireless interference that may be caused by other wireless networks or surrounding
wireless electronics such as cordless phones.
• Place the AP where there are minimum obstacles (such as walls and ceilings) between the AP and
the wireless client.
• Reduce the number of wireless clients connecting to the same AP simultaneously, or add
additional APs if necessary.
• Try closing some programs that use the Internet, especially peer-to-peer applications. If the
wireless client is sending or receiving a lot of information, it may have too many programs open
that use the Internet.
156
NBG4104 User’s Guide
Chapter 24 Troubleshooting
• Position the antenna for best reception. If the AP is placed on a table or floor, point the antenna
upwards. If the AP is placed at a high position, point the antenna downwards. Try pointing the
antenna in different directions and check which provides the strongest signal to the wireless
clients.
NBG4104 User’s Guide
157
Chapter 24 Troubleshooting
158
NBG4104 User’s Guide
A PPENDIX
Product Specifications
The following tables summarize the NBG4104’s hardware and firmware features.
Table 65 Hardware Features
Dimensions
162 mm (W) x 115 mm (D) x 33 mm (H)
Weight
205g (0.45 lb.)
SDRAM
32 MB
Flash Memory
8 MB
Power Specification
Input: 100~240 AC, 50~60 Hz
Output: 12 V DC 0.5A
Ethernet ports
Auto-negotiating: 10 Mbps, 100 Mbps in either half-duplex or full-duplex mode.
Auto-crossover: Use either crossover or straight-through Ethernet cables.
Built-in Switch
The NBG4104 can support speeds from 10 Mbps to 100 Mbps and you can connect
multiple computers or servers (for example, game servers) in your network to the
NBG4104.
LEDs
Power, WPS, WAN, WLAN, LAN1-4
Reset button
The reset button is built into the rear panel. Use this button to restore the
NBG4104 to its factory default settings. Press for longer than 1 second to restart
the device. Press for more than 5 seconds to restore to factory default settings.
WPS button
Press the WPS on two WPS enabled devices within 120 seconds for a securityenabled wireless connection.
Antenna
The NBG4104 is equipped with one 2dBi (2.4GHz) detachable antenna to provide
clear radio transmission and reception on the wireless network.
Operation Environment
Temperature: 0º C ~ 40º C
Humidity: 20% ~ 85% Non-Condensing
Storage Environment
Temperature: -20º C ~ 60º C
Humidity: 20% ~ 90% Non-Condensing
Table 66 Firmware Features
FEATURE
DESCRIPTION
Default LAN IP Address
192.168.1.1 (router)
192.168.1.2. (AP)
Default LAN Subnet
Mask
255.255.255.0 (24 bits)
Default User Name
admin
Default Password
1234
DHCP Pool
192.168.1.33 to 192.168.1.64
Wireless Interface
Wireless LAN
Default Wireless SSID
ZyXEL
NBG4104 User’s Guide
159
Appendix A Product Specifications
Table 66 Firmware Features (continued)
FEATURE
DESCRIPTION
Device Management
Use the Web Configurator to easily configure the rich range of features on the
NBG4104.
Wireless Functionality
Allows IEEE 802.11b, IEEE 802.11g and/or IEEE 802.11n wireless clients to connect
to the NBG4104 wirelessly. Enable wireless security (WPA(2)-PSK) and/or MAC
filtering to protect your wireless network.
Note: The NBG4104 may be prone to RF (Radio Frequency) interference from other
2.4 GHz devices such as microwave ovens, wireless phones, Bluetooth
enabled devices, and other wireless LANs.
Firmware Upgrade
Download new firmware (when available) from the ZyXEL web site and use the Web
Configurator to put it on the NBG4104.
Note: Only upload firmware for your specific model!
160
Configuration Backup &
Restoration
Make a copy of the NBG4104’s configuration and put it back on the NBG4104 later if
you decide you want to revert back to an earlier configuration.
Network Address
Translation (NAT)
Each computer on your network must have its own unique IP address. Use NAT to
convert a single public IP address to multiple private IP addresses for the
computers on your network.
Firewall
You can configure firewall on the NBG4104 for secure Internet access. When the
firewall is on, by default, all incoming traffic from the Internet to your network is
blocked unless it is initiated from your network. This means that probes from the
outside to your network are not allowed, but you can safely browse the Internet
and download files for example.
Content Filter
The NBG4104 blocks web sites with URLs that contain keywords that you specify.
Bandwidth Management
You can efficiently manage traffic on your network by reserving bandwidth and
giving priority to certain types of traffic and/or to particular computers.
Remote Management
This allows you to decide whether a service (HTTP traffic for example) from a
computer on a network (LAN or WAN for example) can access the NBG4104.
Wireless LAN Scheduler
You can schedule the times the Wireless LAN is enabled/disabled.
Time and Date
Get the current time and date from an external server when you turn on your
NBG4104. You can also set the time manually. These dates and times are then used
in logs.
Port Forwarding
If you have a server (mail or web server for example) on your network, then use
this feature to let people access it from the Internet.
DHCP (Dynamic Host
Configuration Protocol)
Use this feature to have the NBG4104 assign IP addresses, an IP default gateway
and DNS servers to computers on your network.
Dynamic DNS Support
With Dynamic DNS (Domain Name System) support, you can use a fixed URL,
www.zyxel.com for example, with a dynamic IP address. You must register for this
service with a Dynamic DNS service provider.
IP Multicast
IP Multicast is used to send traffic to a specific group of computers. The NBG4104
supports versions 1 and 2 of IGMP (Internet Group Management Protocol) used to
join multicast groups (see RFC 2236).
Logging
Use logs for troubleshooting. You can view logs in the Web Configurator.
PPPoE
PPPoE mimics a dial-up Internet access connection.
Universal Plug and Play
(UPnP)
The NBG4104 can communicate with other UPnP enabled devices in a network.
NBG4104 User’s Guide
Appendix A Product Specifications
24.7 Wall-mounting Instructions
Complete the following steps to hang your NBG4104 on a wall.
Select a position free of obstructions on a sturdy wall.
Drill two holes for the screws.
Be careful to avoid damaging pipes or cables located inside the wall
when drilling holes for the screws.
Do not insert the screws all the way into the wall. Leave a small gap of about 0.5 cm between the
heads of the screws and the wall.
Make sure the screws are snugly fastened to the wall. They need to hold the weight of the NBG4104
with the connection cables.
Align the holes on the back of the NBG4104 with the screws on the wall. Hang the NBG4104 on the
screws.
Figure 93 Wall-mounting Example
The following are dimensions of an M4 tap screw and masonry plug used for wall mounting. All
measurements are in millimeters (mm).
Figure 94 Masonry Plug and M4 Tap Screw
NBG4104 User’s Guide
161
Appendix A Product Specifications
162
NBG4104 User’s Guide
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 95 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.
NBG4104 User’s Guide
163
Appendix B Pop-up Windows, JavaScript and Java Permissions
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 96 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.
164
In Internet Explorer, select Tools, Internet Options and then the Privacy tab.
NBG4104 User’s Guide
Appendix B Pop-up Windows, JavaScript and Java Permissions
Select Settings…to open the Pop-up Blocker Settings screen.
Figure 97 Internet Options: Privacy
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.
NBG4104 User’s Guide
165
Appendix B Pop-up Windows, JavaScript and Java Permissions
Click Add to move the IP address to the list of Allowed sites.
Figure 98 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.
166
NBG4104 User’s Guide
Appendix B Pop-up Windows, JavaScript and Java Permissions
In Internet Explorer, click Tools, Internet Options and then the Security tab.
Figure 99 Internet Options: Security
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).
NBG4104 User’s Guide
167
Appendix B Pop-up Windows, JavaScript and Java Permissions
Click OK to close the window.
Figure 100 Security Settings - Java Scripting
Java Permissions
168
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.
NBG4104 User’s Guide
Appendix B Pop-up Windows, JavaScript and Java Permissions
Click OK to close the window.
Figure 101 Security Settings - Java
JAVA (Sun)
From Internet Explorer, click Tools, Internet Options and then the Advanced tab.
Make sure that Use Java 2 for Source Exif Data:
File Type : PDF File Type Extension : pdf MIME Type : application/pdf PDF Version : 1.6 Linearized : Yes Encryption : Standard V2.3 (128-bit) User Access : Print, Annotate, Fill forms, Extract, Print high-res Page Mode : UseOutlines XMP Toolkit : 3.1-702 Create Date : 2011:11:15 13:25:13Z Creator Tool : FrameMaker 9.0 Modify Date : 2012:01:17 09:13:03+08:00 Metadata Date : 2012:01:17 09:13:03+08:00 Producer : Acrobat Distiller 9.4.6 (Windows) Format : application/pdf Title : Creator : . Document ID : uuid:dfcaabc4-7f61-410e-90ef-156ea5044588 Instance ID : uuid:2eef215c-dd8e-4c8b-9189-06197c474ef5 Page Count : 246 Page Layout : OneColumnEXIF Metadata provided by EXIF.tools