Wireless Cable Modem Gateway CG2003D
User Manual
350 East Plumeria Drive
San Jose, CA 95134
USA
January 2011
202-10773-01
v1.0
Wireless Cable Modem Gateway CG2003D User Manual
©2011 NETGEAR, Inc. All rights reserved.
No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated
into any language in any form or by any means without the written permission of NETGEAR, Inc.
Technical Support
Thank you for choosing NETGEAR. To register your product, get the latest product updates, or get support online,
visit us at http://support.netgear.com.
Phone (US & Canada only): 1-888-NETGEAR
Phone (Other Countries): See Support information card.
Trademarks
NETGEAR, the NETGEAR logo, ReadyNAS, ProSafe, Smart Wizard, Auto Uplink, X-RAID2, and NeoTV are
trademarks or registered trademarks of NETGEAR, Inc. Microsoft, Windows, Windows NT, and Vista are
registered trademarks of Microsoft Corporation. Other brand and product names are registered trademarks or
trademarks of their respective holders.
Statement of Conditions
To improve internal design, operational function, and/or reliability, NETGEAR reserves the right to make changes
to the products described in this document without notice. NETGEAR does not assume any liability that may occur
due to the use, or application of, the product(s) or circuit layout(s) described herein.
2 |
Contents
Chapter 1 Connecting the Gateway to the Internet
Chapter 2 Wireless Settings
Unpack your Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Gateway Stand. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Label. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
What You Need Before You Begin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Cabling the Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Log in to the Gateway. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Basic Cable Network Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Wireless Adapter Compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Security Basics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Disable SSID Broadcast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Restrict Access by MAC Address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Wireless Security Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Add Clients (Computers or Devices) to Your Network . . . . . . . . . . . . . . . .13
Manual Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Wi-Fi Protected Setup (WPS) Method . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Wireless Settings Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Consider Every Device on Your Network . . . . . . . . . . . . . . . . . . . . . . . .15
View or Change Wireless Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Set up Access Control by MAC Address . . . . . . . . . . . . . . . . . . . . . . . .16
Change the WPA Security Option and Pre-Shared Key. . . . . . . . . . . . . 18
Set WEP Encryption and Passphrase . . . . . . . . . . . . . . . . . . . . . . . . . .19
Wireless Guest Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Wireless Guest Network Screen Fields . . . . . . . . . . . . . . . . . . . . . . . . .21
Set up Wi-Fi Multimedia . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Chapter 3 Content Filtering and Firewall Rules
Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Block HTTP Traffic by Keywords or Domains . . . . . . . . . . . . . . . . . . . . . .25
Block Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Port Forwarding and Port Blocking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Set Up Port Blocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Set Up Port Forwarding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Set up Port Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Contents | 3
Wireless Cable Modem Gateway CG2003D User Manual
Chapter 4 Managing Your Network
Gateway Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Connection Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Change Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Reset to Factory Default Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Back Up and Restore Your Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Run the Diagnostic Ping Utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Chapter 5 Advanced Settings
Dynamic DNS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Set Up a DMZ Host . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
LAN IP Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Reserve an IP Address for DHCP Use. . . . . . . . . . . . . . . . . . . . . . . . . . 43
Set up Remote Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Remote Management After a Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
URL to Connect to The Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Universal Plug and Play (UPnP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Chapter 6 Troubleshooting
Using LEDs to Troubleshoot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Cannot Log in to the Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Troubleshooting the Internet Connection . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Troubleshooting a TCP/IP Network Using a Ping Utility. . . . . . . . . . . . . . . 49
Test the LAN Path to Your Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Test the Path from Your PC to a Remote Device. . . . . . . . . . . . . . . . . . 50
Appendix A Technical Specifications and Factory Default Settings
Technical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Factory Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Appendix B Related Documents
Appendix C Notification of Compliance
Index
4 | Contents
1. Connecting the Gateway to the Internet
This chapter describes how to set up the Wireless Cable Modem Gateway on your Local Area
Network (LAN), connect to the Internet, and perform basic configuration.
Unpack your Gateway
The product package should contain the following items:
• Wireless Cable Modem Gateway CG2003D
• AC power adapter
• Category 5 (CAT5) Ethernet cable
• Stand
If any parts are incorrect, missing, or damaged, contact your NETGEAR dealer. Keep the
carton and original packing materials, in case you need to return the product for repair.
1
Gateway Stand
You can place the gateway vertically or horizontally.
To place the gateway vertically, attach the stand to
the bottom of the gateway, and place it on a flat
surface, as shown.
Chapter 1. Connecting the Gateway to the Internet | 5
Figure 1. Vertical position with stand
Wireless Cable Modem Gateway CG2003D User Manual
Front Panel
The front panel of the Wireless Cable Modem Gateway contains status LEDs.
WPS
button
Figure 2. Front view
You can use the LEDs to verify connections.The following table lists and describes each LED
on the front panel of the gateway.
Table 1. LED Descriptions
LED Description
Power
Downstream
Link
Upstream
Link
Cable Link
LAN
(local area
network)
• On: Power is supplied to the gateway, and the gateway has completed its initialization.
• Off: Power is not supplied to the gateway.
• On: The gateway completed its downstream scan.
• Blink: The gateway has just powered up or it is performing a downstream scan.
• Off: The gateway’s self-test and initialization is complete but it has not completed the
downstream scan.
• On: The gateway has completed its upstream ranging operation.
• Blink: The gateway has just powered up or it is getting upstream configuration information.
• Off: The gateway’s self-test and initialization is complete but it has not completed the
upstream scan.
• On (green): Configuration by your cable service provider is complete.
• Blink: Both downstream and upstream links are established, but the configuration is not done.
• Off: Configuration of the cable interface is in progress. The downstream and upstream links
have not been established yet.
• On (green): The port has detected link with a 100 Mbps device.
• Blink (green): Data is being transmitted or received at 100 Mbps.
• On (yellow): The Local port has detected link with a 10 Mbps device.
• Blink (yellow): Data is being transmitted or received at 10 Mbps.
• Off: No link is detected on this port.
Wireless
• On: The wireless access point is operating normally.
• Blink: Data is being transmitted or received on the wireless interface.
• Blink in a fast pattern: The gateway attempts to establish a connection to a wireless client
through Wi-Fi Protected Setup (WPS).
• Off: The wireless access point is disabled.
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Rear Panel
The rear panel of the gateway contains the connections identified below:
coaxial cable
4 Ethernet LAN ports
Figure 3. Rear view
AC power adapter
input
Label
The label on the bottom of the gateway shows the gateway’s factory reset button, its default
wireless settings, MAC address, and serial number.
Default wireless settings
Reset to Factory Defaults button
MAC address
Serial number
Figure 4. Label on gateway bottom
What You Need Before You Begin
• A computer with an Ethernet port to connect to the gateway while you set it up. The
computer has to be set up to use DHCP. For help with DHCP configuration, see the link to
the online document ITCP/IP Networking Basics in Appendix B.
• Active Data Over Cable Internet service provided by cable modem account.
• The Internet Service Provider (ISP) configuration information for your cable modem
account.
Chapter 1. Connecting the Gateway to the Internet | 7
Wireless Cable Modem Gateway CG2003D User Manual
Cabling the Gateway
1. Using the coaxial cable provided by your cable company, connect the gateway cable
port (A) to your cable line splitter or outlet.
A
Figure 5. Gateway coaxial cable connection
2. Use the Ethernet cable that shipped with your gateway to connect a LAN port (B) to the
Ethernet adapter in your computer.
B
Figure 6. Gateway Ethernet cable connection
3. Connect the power adapter to the gateway, and plug it into an outlet.
4. Wait about 30 seconds for the lights to stop blinking, and then verify the following:
The power LED is lit.
The cable link LED is solid green, indicating a link has been established to the
cable network.
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Log in to the Gateway
You can log in to the gateway to view or change its settings. You can use an Ethernet cable to
connect the computer to the gateway, or you can connect wirelessly.
1. Using the computer that you first used to access your cable modem Internet service,
type http://192.168.0.1 in the address field of your Internet browser. A login window
opens.
2. Log in to the gateway.
There are two methods to log in:
• For superuser access, enter MSO for the user name and changeme for the
password. Both are case-sensitive.
• To access the gateway features except for content filtering, enter admin for the
user name and password for the password, both in lower case letters.
When you connect to the gateway, the Gateway Status screen displays.
For more information about this screen, see Gateway Status on page 33.
Chapter 1. Connecting the Gateway to the Internet | 9
Wireless Cable Modem Gateway CG2003D User Manual
If you do not see the login prompt:
1. Check the LEDs on the gateway front panel to make sure that the gateway is plugged
into an electrical outlet, its power is on, and the Ethernet cable between your computer
and the gateway is connected to a LAN port.
2. If you connected the Ethernet cable and quickly launched your browser and typed in the
router URL, your computer might need a minute or two to recognize the LAN connection.
Relaunch your browser and try again.
3. If you are having trouble accessing the gateway wirelessly, NETGEAR recommends that
during setup you use an Ethernet cable to connect your computer so that you can log in to
the gateway.
Note: If you cannot connect to the gateway, check the Internet Protocol
(TCP/IP) properties in the Network Connections section of your PC
Control Panel. They should be set to obtain both IP and DNS server
addresses automatically. See your computer documentation or
follow the links in Related Documents on page 146 for assistance.
Basic Cable Network Settings
To configure the cable network settings, in the main menu, under Setup, select Basic
Settings. The Basic Settings screen displays.
The default setting is for DHCP. Click Apply to save your settings. After you connect to the
Internet, the network configuration settings on this screen match the cable network settings.
10 | Chapter 1. Connecting the Gateway to the Internet
2. Wireless Settings
For a wireless connection, you need to set up your wireless computer or device to use the
gateway’s SSID, also called the wireless network name, and wireless security settings.
NETGEAR strongly recommends that you use wireless security.
This chapter includes:
• Wireless Adapter Compatibility on this page
• Security Basics on page 12
• Add Clients (Computers or Devices) to Your Network on page 13
• Wireless Settings Screen on page 14
• Wireless Guest Networks on page 20
• Set up Wi-Fi Multimedia on page 21
Wireless Adapter Compatibility
2
A wireless adapter is the wireless radio in your PC or laptop that lets the PC or laptop
connect to a wireless network. Most PCs and laptops come with an adapter already installed,
but if it is outdated or slow, you can purchase a USB adapter to plug into a USB port.
Make sure the wireless adapter in each computer in your wireless network supports the
same security settings as the gateway.
Note: If you connect devices to your gateway using WPS as described in
Wi-Fi Protected Setup (WPS) Method on page 13, those devices
assume the security settings of the gateway.
Chapter 2. Wireless Settings | 11
Wireless Cable Modem Gateway CG2003D User Manual
Security Basics
Unlike wired network data, wireless data transmissions extend beyond your walls and can be
received by any device with a compatible wireless adapter (radio). For this reason, it is very
important to maintain the preset security and understand the other security features available
to you. Besides the preset security settings described above, your gateway has the security
features described here and in
• Disable SSID broadcast
• Restrict access by MAC address
• Wireless security options
Disable SSID Broadcast
By default, the gateway broadcasts its Wi-Fi network name (SSID) so devices can find it. If
you change this setting to not allow the broadcast, wireless devices will not find your gateway
unless they are configured with the same SSID. See
page 16 for the procedure.
Chapter 4, Content Filtering Settings.
Wireless Access Point Settings on
Turning off SSID broadcast nullifies the wireless network discovery feature of some products
such as Windows XP, but the data is still exposed to a determined snoop using specialized
test equipment like wireless sniffers. If you allow the broadcast, be sure to keep wireless
security enabled.
Restrict Access by MAC Address
You can enhance your network security by allowing access to only specific PCs based on
their Media Access Control (MAC) addresses. You can restrict access to only trusted PCs so
that unknown PCs cannot wirelessly connect to the gateway.The Wireless Station MAC
address filtering adds additional security protection to the wireless security option that you
have in force. Access List determines which wireless hardware devices are allowed to
connect to the gateway by MAC address. See
the procedure.
Advanced Wireless Settings on page 79 for
Wireless Security Options
A security option is the type of security protocol applied to your wireless network. The
security protocol encrypts data transmissions and ensures that only trusted devices receive
authorization to connect to your network. There are several types of encryption: Wi-Fi
Protected Access II (WPA2), WPA, and Wired Equivalent Privacy (WEP). WPA2 is the most
recent, and is recommended if your equipment supports it. WPA has several options
including pre-shared key (PSK) encryption and 802.1x encryption for enterprises. Note that it
is also possible to disable wireless security. NETGEAR does not recommend this. You can
view or change the wireless security options in the Wireless Settings screen. See
Settings Screen on page 14.
Wireless
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Wireless Cable Modem Gateway CG2003D User Manual
Add Clients (Computers or Devices) to Your Network
Choose either the manual or the WPS method to add wireless computers or devices to your
wireless network.
Manual Method
1. Open the software that manages your wireless connections on the wireless device
(laptop computer, gaming device, iPhone) that you want to connect to your gateway.
This software scans for all wireless networks in your area.
2. Look for your network and select it. If you did not change the name of your network during
the setup process, look for the default Wi-Fi network name (SSID) and select it. The default
Wi-Fi network name (SSID) is located on the product label on the bottom of the gateway.
3. Enter the gateway passphrase and click Connect. The default gateway passphrase is
located on the product label on the bottom of the gateway.
4. Repeat steps 1–3 to add other wireless devices.
Wi-Fi Protected Setup (WPS) Method
Wi-Fi Protected Setup (WPS) is a standard that lets you easily join a secure wireless network
with WPA or WPA2 wireless security. The gateway automatically sets security for each
computer or device that uses WPS to join the wireless network. To use WPS, make sure that
your wireless devices are Wi-Fi certified and support WPS. NETGEAR products that use
WPS call it Push 'N' Connect
Note: If the wireless network name (SSID) changes each time you add a
WPS client, the Keep Existing Wireless Settings check box on the
Advanced Wireless Settings screen has been cleared. See WPS
Settings on page 80 for more information about this setting.
You can use a WPS button or the gateway interface method to add wireless computers and
devices to your wireless network.
WPS Button Method
1. Press the WPS button on the gateway front panel .
2. Within 2 minutes, press the WPS button on your wireless computer or device, or follow the
WPS instructions that came with the computer. The device is now connected to your
gateway.
3. Repeat steps 1 and 2 to add other WPS wireless computers or devices.
1
.
1. For a list of other Wi-Fi-certified products available from NETGEAR, go to http://www.wi-fi.org.
Chapter 2. Wireless Settings | 13
Wireless Cable Modem Gateway CG2003D User Manual
Gateway Interface Method
1. Select Add WPS Client at the top of the gateway menus.
2. Click Next. The following screen lets you select the method for adding the WPS client.
WPS Push button method
3. Select either Push Button or PIN Number. With either method, the gateway tries to
communicate with the computer or wireless device, set the wireless security for wireless
device, and allow it to join the wireless network.
The PIN method displays this screen so you can enter the client security PIN number:
WPS PIN method
While the gateway attempts to connect, the WPS LED on the front of the gateway blinks
green. When the gateway establishes a WPS connection, the LED is solid green and the
gateway WPS screen displays a confirmation message.
4. Repeat to add another WPS client to your network.
Wireless Settings Screen
The Wireless Settings screen lets you view or change the wireless network settings. If you
change the settings, note the new settings and save them in a secure location.
Note: If you use a wireless computer to change the wireless network name
(SSID) or security options, you are disconnected when you click
Apply. To avoid this problem, use a computer with a wired
connection to access the gateway.
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Consider Every Device on Your Network
Before you begin, check the following:
• Every wireless computer has to be set up to get an IP address by DHCP from the
gateway as described in Use Standard TCP/IP Properties for DHCP on page 18.
• To join your wireless network, each computer or wireless adapter has to be compatible
with the wireless mode (bandwidth/data rate) of the gateway. Check that each wireless
computer or device supports the mode you want to use.
• The security option on each wireless device in the network has to match the gateway. For
example, if you use WPA2 or WPA, you need to use the pre-shared key from each
wireless computer in order for it to join the wireless network.
View or Change Wireless Settings
To view or change the wireless settings:
1. Select Setup > Wireless Settings. The Wireless Settings screen displays.
2. If you make changes, you have to click Apply for them to take effect.
Chapter 2. Wireless Settings | 15
Wireless Cable Modem Gateway CG2003D User Manual
The following sections describe the fields in the Wireless Settings screen.
Wireless Network
• Name (SSID). The SSID is also known as the wireless network name. Enter a
32-character (maximum) name in this field. This field is case-sensitive. The default SSID
is randomly generated, and there is typically no need to change it. If you want to set up
guest networks, NETGEAR does recommend that you customize the default guest
network names (SSIDs).
• Channel. The wireless channel used by the gateway: 1 through 13. Do not change the
channel unless you experience interference (shown by lost connections or slow data
transfers). If this happens, experiment with different channels to see which is the best.
Wireless Access Point Settings
• Enable. When this check box is not selected, the wireless signal in the gateway so it can
accept wireless clients. When not enabled, the gateway accepts wired clients only. This
check box is selected by default.
• Allow Broadcast of Name (SSID). This setting allows the gateway to broadcasts its
SSID so wireless stations can see this wireless name (SSID) in its scanned network list.
This check box is selected by default. To turn off the SSID broadcast, clear the Allow
Broadcast of Name (SSID) check box and click Apply.
Wireless Card Access List
By default, any wireless PC that is configured with the correct SSID and network password is
allowed to join your wireless network. For increased security, you can restrict access to the
wireless network to only allow specific PCs based on their MAC addresses.
Set up Access Control by MAC Address
When you enable access control, the access point only accepts connections from clients on the
selected access control list. This provides an additional layer of security
To restrict access based on MAC addresses:
1. In the Wireless Settings screen, select the Turn Access Control On check box.
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2. Click the Setup Access List button to display the Wireless Card Access List screen.
By default, the Access List table is empty. You need to add wireless devices here so that
they will have access to the wireless network when the list is enabled.
3. Adjust the access list as needed for your network. You can add devices to the access list
using either of the following methods:
• If the computer is in the Connected Wireless Devices table, click the radio button of
that computer to capture its MAC address. Then click Add.
• Enter the MAC address of the device in the Add Access Filter fields. The MAC
address can usually be found on the bottom of the wireless device. Then click Add
Note: If no device name displays when you enter the MAC address, you
can type a descriptive name for the computer that you are adding.
4. Click Apply to save these settings. Now, only devices in the Access List table are allowed to
wirelessly connect to the gateway.
.
Security Options Settings
The Security Options section of the Wireless Settings screen lets you change the security
option and passphrase. The primary network for your gateway is already set up with WPA2
and WPA security. NETGEAR recommends that you set up wireless security for each guest
network that you plan to use.For information about changing these settings, see the following
section, Change the WPA Security Option and Pre-Shared Key on page 18and Set WEP
Encryption and Passphrase on page 19.
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Wireless Cable Modem Gateway CG2003D User Manual
Change the WPA Security Option and Pre-Shared Key
1. In the Security Options section, select the WPA option that you want.
2. Enter the pre-shared key that you want to use. The pre-shared key acts as a password to
access your wireless network. It is a text string from 8 to 63 characters.
3. Click Apply.
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Set WEP Encryption and Passphrase
1. In the Security Options section of the Wireless Settings screen, select the WEP radio
button that you want.
2. Enter the four data encryption keys either manually or automatically. These values have to
be identical on all computers and access points in your network.
• Automatic. Enter a word or group of printable characters in the Passphrase field and
click Generate. The four key fields are automatically populated.
• Manual. The number of hexadecimal digits that you enter depends on the encryption
strength setting:
- For 64-bit WEP, enter 10 hexadecimal digits (any combination of 0–9, a–f, or
A–F).
- For 128-bit WEP, enter 26 hexadecimal digits (any combination of 0–9, a–f, or
A–F).
3. Select the radio button for the key you want to make active.
Make sure you understand how to set up the WEP key settings in your wireless
computers or adapters. Wireless adapter configuration utilities such as the one in
Windows XP allow one key entry, which has to match the default key you set in the
gateway.
4. Click Apply.
Chapter 2. Wireless Settings | 19
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