Cisco | LINKSYS WAG54GS (EU) | User guide | Cisco LINKSYS WAG54GS (EU) User guide

2,4 GHz Wireless-G
802.11g
ADSL Gateway
WIRELESS
Model No.
WAG54G
User Guide
Wireless-G ADSL Gateway
Copyright and Trademarks
Specifications are subject to change without notice. Linksys is a registered trademark or trademark of Cisco
Systems, Inc. and/or its affiliates in the U.S. and certain other countries. Copyright © 2006 Cisco Systems, Inc. All
rights reserved. Other brands and product names are trademarks or registered trademarks of their respective
holders.
How to Use this Guide
Your Guide to the Wireless-G ADSL Gateway has been designed to make understanding networking with the
Gateway easier than ever. Look for the following items when reading this User Guide:
This checkmark means there is a Note of interest and
is something you should pay special attention to while
using the Gateway.
This exclamation point means there is a Caution or
Warning and is something that could damage your
property or the Gateway.
This question mark provides you with a reminder about
something you might need to do while using the Gateway.
In addition to these symbols, there are definitions for technical terms that are presented like this:
word: definition.
Also, each figure (diagram, screenshot, or other image) is provided with a figure number and description, like
this:
Figure 0-1: Sample Figure Description
Figure numbers and descriptions can also be found in the “List of Figures” section in the table of contents.
WAG54Gv3-UG-60512B BW
Wireless-G ADSL Gateway
Table of Contents
Chapter 1: Introduction
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Welcome
What’s in this User Guide?
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Chapter 2: Planning Your Network
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The Gateway’s Functions
IP Addresses
What is a VPN?
Why do I need a VPN?
Chapter 3: Getting to Know the Wireless-G ADSL Gateway
Ports and Reset Button on Side Panel
LEDs and Power Button on Side Panel
The Bottom Panel
Chapter 4: Connecting the Wireless-G ADSL Gateway
Overview
Wired Connection to a Computer
Wireless Connection to a Computer
Chapter 5: Configuring the Wireless-G ADSL Gateway
Overview
How to Access the Web-based Utility
The Setup Tab
The Wireless Tab
The Security Tab
The Access Restriction Tab
The Applications & Gaming Tab
The Administration Tab
The Status Tab
Appendix A: Troubleshooting
Common Problems and Solutions
Frequently Asked Questions
Appendix B: Wireless Security
Security Precautions
Security Threats Facing Wireless Networks
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Appendix C: Finding the MAC Address and IP Address for Your Ethernet Adapter 68
Windows 98 or Me Instructions
Windows 2000 or XP Instructions
Appendix D: Upgrading Firmware
Appendix E: Glossary
Appendix F: Specifications
Appendix G: Regulatory Information
Appendix H: Warranty Information
Appendix I: Contact Information
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List of Figures
Figure 2-1: Network
Figure 3-1: Ports and Reset Button on Side Panel
Figure 3-2: Power Button and LEDs on Side Panel
Figure 3-3: Bottom Panel with Stand in Closed Position
Figure 4-1: Connect the ADSL Line
Figure 4-2: Connect a PC
Figure 4-3: Connect the Power
Figure 4-4: Connect the ADSL Line
Figure 4-5: Connect the Power
Figure 5-1: Login Screen
Figure 5-2: Basic Setup
Figure 5-3: RFC 1483 Bridged - Dynamic IP
Figure 5-4: RFC 1483 Bridged - Static IP
Figure 5-5: RFC 1483 Routed
Figure 5-6: IPoA
Figure 5-7: RFC 2516 PPPoE
Figure 5-8: RFC 2364 PPPoA
Figure 5-9: Bridged Mode Only
Figure 5-10: Optional Settings
Figure 5-11: Advanced DHCP
Figure 5-12: DynDNS.org
Figure 5-13: TZO.com
Figure 5-14: Advanced Routing
Figure 5-15: Routing Table
Figure 5-16: PVC Routing
Figure 5-17: Basic Wireless Settings
Figure 5-18: WPA Pre-Shared Key
Figure 5-19: WPA RADIUS
Figure 5-20: WEP
Figure 5-21: Wireless Network Access
Figure 5-22: MAC Address Filter List
Figure 5-23: Wireless Client MAC List
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Figure 5-24: Advanced Wireless Settings
Figure 5-25: Firewall
Figure 5-26: Firewall Log
Figure 5-27: VPN
Figure 5-28: VPN Settings Summary
Figure 5-29: Advanced IPSec Settings
Figure 5-30: VPN Log
Figure 5-31: Internet Access
Figure 5-32: Internet Policy Summary
Figure 5-33: List of PCs
Figure 5-34: Add/Edit Service
Figure 5-35: Single Port Forwarding
Figure 5-36: Port Range Forwarding
Figure 5-37: Port Triggering
Figure 5-38: DMZ
Figure 5-39: QoS
Figure 5-40: Edit List of QoS Settings
Figure 5-41: Management
Figure 5-42: Allowed IP - IP Range
Figure 5-43: Reporting
Figure 5-44: System Log
Figure 5-45: Ping Test
Figure 5-46: Backup&Restore
Figure 5-47: Factory Defaults
Figure 5-48: Firmware Upgrade
Figure 5-49: Reboot
Figure 5-50: Gateway
Figure 5-51: Local Network
Figure 5-52: DHCP Active IP Table
Figure 5-53: ARP/RARP Table
Figure 5-54: Wireless
Figure 5-55: Networked Computers
Figure 5-56: DSL Connection
Figure C-1: IP Configuration Screen
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Figure C-2: MAC Address/Adapter Address
Figure C-3: MAC Address/Physical Address
Figure D-1: Firmware Upgrade
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Chapter 1: Introduction
Welcome
Thank you for choosing the Wireless-G ADSL Gateway. This Gateway will provide your computers with a highspeed Internet connection as well as resources, including files and printers. Since the Gateway is wireless,
Internet access can be shared over the wired network as well as the wireless broadcast at up to 11Mbps for
Wireless-B or up to 54Mbps for Wireless-G.
How does the Gateway do all of this? By connecting the Internet, as well as your computers and peripherals, to
the Gateway, then the Gateway can direct and control communications for your network.
To protect your data and privacy, the Gateway features an advanced firewall to keep out Internet intruders.
Wireless transmissions can be protected by powerful data encryption. In addition, you can safeguard your family
with parental control features such as Internet access restrictions and keyword blocking. You can configure the
Gateway’s settings through the easy-to-use, browser-based utility.
But what does all of this mean?
Networks are useful tools for sharing Internet access and computer resources. You can access one printer from
different computers and access data located on another computer’s hard drive. Networks are even used for
playing multiplayer video games. So, networks not only are useful in homes and offices, but also can be fun.
wpa (wi-fi protected access): a wireless security
protocol using TKIP (Temporal Key Integrity Protocol)
encryption, which can be used in conjunction with a
RADIUS server.
spi (stateful packet inspection) firewall: a technology
that inspects incoming packets of information before
allowing them to enter the network.
firewall: Security measures that protect the
resources of a local network from intruders.
nat (network address translation): NAT technology
translates IP addresses of a local area network to a
different IP address for the Internet.
PCs on a wired network create a LAN, or Local Area Network. They are connected with Ethernet cables, which is
why the network is called “wired.” PCs equipped with wireless cards or adapters can communicate without
cumbersome cables. By sharing the same wireless settings, within their transmission radius, they form a
wireless network. This is sometimes called a WLAN, or Wireless Local Area Network. Since the Gateway has
wireless capabilities, it can bridge your wired and wireless networks, letting them communicate with each other.
network: a series of computers or devices
connected for the purpose of data sharing,
storage, and/or transmission between users
With your networks all connected, wired, wireless, and the Internet, you can now share files and Internet
access—and even play games. All the while, the Wireless-G ADSL Gateway protects your networks from
unauthorized and unwelcome users.
lan (local area network): The computers and
networking products that make up the network in
your home or office.
Linksys recommends using the Setup CD-ROM for first-time installation of the Gateway. If you do not wish to run
the Setup Wizard on the Setup CD-ROM, then use the instructions in this Guide to help you connect the Gateway,
set it up, and configure it to bridge your different networks. These instructions should be all you need to get the
most out of the Wireless-G ADSL Gateway.
Chapter 1: Introduction
Welcome
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Wireless-G ADSL Gateway
What’s in this User Guide?
This user guide covers the steps for setting up and using the Wireless-G ADSL Gateway.
• Chapter 1: Introduction
This chapter describes applications of the Wireless-G ADSL Gateway and this User Guide.
• Chapter 2: Planning Your Network
This chapter describes the basics of networking.
• Chapter 3: Getting to Know the Wireless-G ADSL Gateway
This chapter describes the physical features of the Gateway.
• Chapter 4: Connecting the Wireless-G ADSL Gateway
This chapter instructs you on how to connect the Gateway to your network.
• Chapter 5: Configuring the Wireless-G ADSL Gateway
This chapter explains how to use the Web-based Utility to configure the settings on the Gateway.
• Appendix A: Troubleshooting
This appendix describes some problems and solutions, as well as frequently asked questions, regarding
installation and use of the Wireless-G ADSL Gateway.
• Appendix B: Wireless Security
This appendix explains the risks of wireless networking and some solutions to reduce the risks.
• Appendix C: Finding the MAC Address and IP Address for your Ethernet Adapter.
This appendix describes how to find the MAC address for your computer’s Ethernet adapter so you can use
the MAC filtering and/or MAC address cloning feature of the Gateway.
• Appendix D: Upgrading Firmware
This appendix instructs you on how to upgrade the firmware on the Gateway if you should need to do so.
• Appendix E: Glossary
This appendix gives a brief glossary of terms frequently used in networking.
• Appendix F: Specifications
This appendix provides the technical specifications for the Gateway.
• Appendix G: Warranty Information
This appendix supplies the warranty information for the Gateway.
Chapter 1: Introduction
What’s in this User Guide?
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Wireless-G ADSL Gateway
• Appendix H: Regulatory Information
This appendix supplies the regulatory information regarding the Gateway.
• Appendix I: Contact Information
This appendix provides contact information for a variety of Linksys resources, including Technical Support.
Chapter 1: Introduction
What’s in this User Guide?
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Wireless-G ADSL Gateway
Chapter 2: Planning Your Network
The Gateway’s Functions
A Gateway is a network device that connects two networks together.
In this instance, the Gateway connects your Local Area Network (LAN), or the group of computers in your home or
office, to the Internet. The Gateway processes and regulates the data that travels between these two networks.
The Gateway’s NAT feature protects your network of computers so users on the public, Internet side cannot “see”
your computers. This is how your network remains private. The Gateway protects your network by inspecting
every packet coming in through the Internet port before delivery to the appropriate computer on your network.
The Gateway inspects Internet port services like the web server, ftp server, or other Internet applications, and, if
allowed, it will forward the packet to the appropriate computer on the LAN side.
Remember that the Gateway’s ports connect to two sides. The LAN ports connect to the LAN, and the ADSL port
connects to the Internet. The LAN ports transmit data at 10/100Mbps.
IP Addresses
What’s an IP Address?
IP stands for Internet Protocol. Every device on an IP-based network, including computers, print servers, and
Gateways, requires an IP address to identify its “location,” or address, on the network. This applies to both the
Internet and LAN connections. There are two ways of assigning an IP address to your network devices. You can
assign static IP addresses or use the Gateway to assign IP addresses dynamically.
Static IP Addresses
A static IP address is a fixed IP address that you assign manually to a computer or other device on the network.
Since a static IP address remains valid until you disable it, static IP addressing ensures that the device assigned
it will always have that same IP address until you change it. Static IP addresses must be unique and are
commonly used with network devices such as server computers or print servers.
Chapter 2: Planning Your Network
The Gateway’s Functions
Figure 2-1: Network
ip (internet protocol): a protocol used to send data
over a network
NOTE: Since the Gateway is a device that connects
two networks, it needs two IP addresses—one for
the LAN, and one for the Internet. In this User Guide,
you’ll see references to the “Internet IP address”
and the “LAN IP address.”
Since the Gateway uses NAT technology, the only IP
address that can be seen from the Internet for your
network is the Gateway’s Internet IP address.
However, even this Internet IP address can be
blocked, so that the Gateway and network seem
invisible to the Internet—see the Block WAN
Requests description under Security in “Chapter 5:
Configuring the Wireless-G ADSL Gateway.”
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Wireless-G ADSL Gateway
Since you use the Gateway to share your DSL Internet connection, contact your ISP to find out if they have
assigned a static IP address to your account. If so, you will need that static IP address when configuring the
Gateway. You can get that information from your ISP.
Dynamic IP Addresses
A dynamic IP address is automatically assigned to a device on the network, such as computers and print servers.
These IP addresses are called “dynamic” because they are only temporarily assigned to the computer or device.
After a certain time period, they expire and may change. If a computer logs onto the network (or the Internet) and
its dynamic IP address has expired, the DHCP server will automatically assign it a new dynamic IP address.
DHCP (Dynamic Host Configuration Protocol) Servers
Computers and other network devices using dynamic IP addressing are assigned a new IP address by a DHCP
server. The computer or network device obtaining an IP address is called the DHCP client. DHCP frees you from
having to assign IP addresses manually every time a new user is added to your network.
A DHCP server can either be a designated computer on the network or another network device, such as the
Gateway. By default, the Gateway’s DHCP Server function is enabled.
If you already have a DHCP server running on your network, you must disable one of the two DHCP servers. If you
run more than one DHCP server on your network, you will experience network errors, such as conflicting IP
addresses. To disable DHCP on the Gateway, see the DHCP section in “Chapter 5: Configuring the Wireless-G
ADSL Gateway.”
What is a VPN?
A VPN, or Virtual Private Network, is a connection between two endpoints — a VPN Gateway, for instance — in
different networks that allows private data to be sent securely over a shared or public network such as the
Internet. This establishes a private network that can send data securely between these two locations or
networks.
This is done by creating a “tunnel.” A VPN tunnel connects the two computers or networks and allows data to be
transmitted over the Internet as if it were still within those networks. Not a literal tunnel, it is a connection
secured by encrypting the data sent between the two networks.
VPNs were created as a cost-effective alternative to using a private, dedicated, leased line for a private network.
Using industry-standard encryption and authentication techniques — IPSec, short for IP Security — the VPN
creates a secure connection that, in effect, operates as if you were directly connected to your local network.
Virtual Private Networking can be used to create secure networks linking a central office with branch offices,
Chapter 2: Planning Your Network
What is a VPN?
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telecommuters, and/or professionals on the road (travelers can connect to a VPN Gateway using any computer
with VPN client software that supports IPSec, such as SSH Sentinel.)
There are two basic ways to create a VPN connection:
• VPN Gateway to VPN Gateway
• Computer (using VPN client software that supports IPSec) to VPN Gateway
The VPN Gateway creates a “tunnel” or channel between two endpoints, so that data transmissions between
them are secure. A computer with VPN client software that supports IPSec can be one of the two endpoints. Any
computer with the built-in IPSec Security Manager (Microsoft 2000 and XP) allows the VPN Gateway to create a
VPN tunnel using IPSec. Other versions of Microsoft operating systems require additional, third-party VPN client
software applications that support IPSec to be installed.
Computer (using VPN client software that supports IPSec) to VPN Gateway
The following is an example of a computer-to-VPN Gateway VPN: In her hotel room, a traveling businesswoman
dials up her ISP. Her notebook computer has VPN client software that is configured with her office's VPN settings.
She accesses the VPN client software that supports IPSec and connects to the VPN Gateway at the central office.
As VPNs utilize the Internet, distance is not a factor. Using the VPN, the businesswoman now has a secure
connection to the central office's network, as if she were physically connected.
VPN Gateway to VPN Gateway
An example of a VPN Gateway-to-VPN Gateway VPN would be as follows: At home, a telecommuter uses his VPN
Gateway for his always-on Internet connection. His Gateway is configured with his office's VPN settings. When he
connects to his office's Gateway, the two Gateways create a VPN tunnel, encrypting and decrypting data. As VPNs
utilize the Internet, distance is not a factor. Using the VPN, the telecommuter now has a secure connection to the
central office's network, as if he were physically connected.
For additional information and instructions about creating your own VPN, please visit Linksys's international Web
site at http://www.linksys.com/international/.
Why do I need a VPN?
Computer networking provides a flexibility not available when using a paper-based system. With this flexibility,
however, comes an increased risk in security. This is why firewalls were first introduced. Firewalls help to protect
data inside of a local network. But what do you do once information is sent outside of your local network, when
Chapter 2: Planning Your Network
Why do I need a VPN?
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e-mails are sent to their destination, or when you have to connect to your company's network when you are out
on the road? How is your data protected?
That is when a VPN can help. VPNs secure data moving outside of your network as if it were still within that
network.
When data is sent out across the Internet from your computer, it is always open to attacks. You may already have
a firewall, which will help protect data moving around or held within your network from being corrupted or
intercepted by entities outside of your network, but once data moves outside of your network — when you send
data to someone via email or communicate with an individual over the Internet — the firewall will no longer
protect that data.
At this point, your data becomes open to hackers using a variety of methods to steal not only the data you are
transmitting but also your network login and security data. Some of the most common methods are as follows:
1) MAC Address Spoofing
Packets transmitted over a network, either your local network or the Internet, are preceded by a packet header.
These packet headers contain both the source and destination information for that packet to transmit efficiently.
A hacker can use this information to spoof (or fake) a MAC address allowed on the network. With this spoofed
MAC address, the hacker can also intercept information meant for another user.
2) Data Sniffing
Data “sniffing” is a method used by hackers to obtain network data as it travels through unsecured networks,
such as the Internet. Tools for just this kind of activity, such as protocol analyzers and network diagnostic tools,
are often built into operating systems and allow the data to be viewed in clear text.
3) Man in the Middle Attacks
Once the hacker has either sniffed or spoofed enough information, he can perform a “man in the middle” attack.
This attack is performed, when data is being transmitted from one network to another, by rerouting the data to a
new destination. Even though the data is not received by its intended recipient, it appears that way to the person
sending the data.
These are only a few of the methods hackers use and they are always developing more. Without the security of
your VPN, your data is constantly open to such attacks as it travels over the Internet. Data travelling over the
Internet will often pass through many different servers around the world before reaching its final destination.
That's a long way to go for unsecured data and this is when a VPN serves its purpose.
Chapter 2: Planning Your Network
Why do I need a VPN?
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Chapter 3: Getting to Know the Wireless-G ADSL Gateway
Ports and Reset Button on Side Panel
The Gateway’s ports and Reset button are located on a side panel.
Figure 3-1: Ports and Reset Button on Side Panel
Line
The Line port connects to the ADSL line.
Ethernet (1-4)
The Ethernet ports connect to your computers and other network devices.
Reset Button
There are two ways to reset the Gateway's factory defaults. Either press the Reset Button, for
approximately ten seconds, or restore the defaults from the Factory Defaults screen of the
Administration tab in the Gateway’s Web-based Utility.
Power
The Power port is where you will connect the power adapter.
Chapter 3: Getting to Know the Wireless-G ADSL Gateway
Ports and Reset Button on Side Panel
IMPORTANT: Resetting the Gateway to factory
defaults will erase all of your settings
(including Internet connection, wireless, and
other settings) and replace them with the
factory defaults. Do not reset the Gateway if
you want to retain these settings.
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LEDs and Power Button on Side Panel
The Gateway's LEDs, which indicate network activity, are located on the other side panel. The Gateway’s power
button is also located on this panel.
Figure 3-2: Power Button and LEDs on Side Panel
Press the power button to turn the Gateway on or off when power is available from the power adapter.
The Gateway’s LEDs are described below.
POWER
Green. The POWER LED lights up when the Gateway is powered on.
ETHERNET (1-4) Green. The ETHERNET LED serves two purposes. If the LED is continuously lit, the Gateway is
successfully connected to a device through the LAN port. If the LED is flashing, it is an
indication of any network activity.
WIRELESS
Green. The WIRELESS LED lights up whenever there is a successful wireless connection. If the
LED is flashing, the Gateway is actively sending or receiving data to or from one of the devices
on the network.
DSL
Green. The DSL LED lights up whenever there is a successful DSL connection. The LED blinks
while the Gateway is establishing the ADSL connection.
INTERNET
Green/Red. The INTERNET LED lights up green when a connection to your Internet Service
Provider (ISP) is established, and blinks when information is passing through the connection. If
the connection is in bridge-only mode, however, the INTERNET LED does not light up. The
INTERNET LED lights up red when the connection to the ISP fails.
Chapter 3: Getting to Know the Wireless-G ADSL Gateway
LEDs and Power Button on Side Panel
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The Bottom Panel
The Gateway has a built-in stand available. If you place the Gateway flat on a surface, then you can leave the
stand in the closed position. However, if you want the Gateway to be upright, swivel the stand clockwise 90º and
position the Gateway accordingly.
Figure 3-3: Bottom Panel with Stand in
Closed Position
Chapter 3: Getting to Know the Wireless-G ADSL Gateway
The Bottom Panel
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Chapter 4: Connecting the Wireless-G ADSL Gateway
Overview
The installation technician from your ISP should have left the setup information for the modem with you after
installing your broadband connection. If not, you can call your ISP to request that data.
After you have the setup information you need for your specific type of Internet connection, you can begin
installation and setup of the Gateway.
If you want to use a computer with an Ethernet adapter to configure the Gateway, continue to “Wired Connection
to a Computer.” If you want to use a computer with a wireless adapter to configure the Gateway, continue to
“Wireless Connection to a Computer.”
Chapter 4: Connecting the Wireless-G ADSL Gateway
Overview
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Wired Connection to a Computer
1. Make sure that all of your network’s hardware is powered off, including the Gateway and all computers.
2. Connect a phone cable from the Line port on the Gateway’s side panel to the wall jack of the ADSL line. A
small device called a microfilter (not included) may be necessary between each phone and wall jack to
prevent interference. Contact your ISP if you have any questions.
IMPORTANT: For countries that have phone jacks with RJ-11 connectors, make sure to only place
the microfilters between the phone and the wall jack and not between the Gateway and the wall
jack or your ADSL will not connect.
Figure 4-1: Connect the ADSL Line
For countries that do not have phone jacks with RJ-11 connectors (e.g. France, Sweden,
Switzerland, United Kingdom, etc.), except for ISDN users, the microfilter has to be used between
the Gateway and the wall jack, because the microfilter will have the RJ-11 connector.
Annex B users (E1 and DE versions of the Gateway) must use the included special cable to connect
the Gateway to the wall jack (RJ-45 to RJ-12). If you require splitters or special jacks, please
contact your service provider.
3. Connect one end of an Ethernet network cable to one of the Ethernet ports (labeled 1-4) on the back of the
Gateway, and the other end to an Ethernet port on a computer. Repeat this step to connect more computers, a
switch, or other network devices to the Gateway.
4. Connect the power adapter to the Gateway’s Power port, plug the power adapter into a power outlet, and
press the Gateway’s power button.
NOTE: You should always plug the Gateway’s power adapter into a power strip with
surge protection.
Figure 4-2: Connect a PC
The Power LED on the front panel will light up red as soon as the Gateway is turned on. The Power LED will
next flash green for a few seconds, and then it will be solidly lit when the self-test is complete. If the LED
flashes for one minute or longer, see “Appendix A: Troubleshooting.”
5. Power on one of your computers that is connected to the Gateway.
Go to “Chapter 5: Configuring the Wireless-G ADSL Gateway.”
Figure 4-3: Connect the Power
Chapter 4: Connecting the Wireless-G ADSL Gateway
Wired Connection to a Computer
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Wireless Connection to a Computer
If you want to use a wireless connection to access the Gateway, follow these instructions:
1. Make sure that all of your network’s hardware is powered off, including the Gateway and all computers.
2. Connect a phone cable from the Line port on the Gateway’s back panel to the wall jack of the ADSL line. A
small device called a microfilter (not included) may be necessary between each phone and wall jack to
prevent interference. Contact your ISP if you have any questions.
IMPORTANT: For countries that have phone jacks with RJ-11 connectors, make sure you only place
the microfilters between the phone and the wall jack and not between the Gateway and the wall jack
or your ADSL will not connect.
Figure 4-4: Connect the ADSL Line
For countries that do not have phone jacks with RJ-11 connectors (e.g. France, Sweden, Switzerland,
United Kingdom, etc.), except for ISDN users, the microfilter has to be used between the Gateway and
the wall jack, because the microfilter will have the RJ-11 connector.
Annex B users (E1 and DE versions of the Gateway) must use the included special cable to connect
the Gateway to the wall jack (RJ-45 to RJ-12). If you require splitters or special jacks, please contact
your service provider.
3. Connect the power adapter to the Power port, plug the power adapter into a power outlet, and press the
Gateway’s power button.
The Power LED on the front panel will light up red as soon as the Gateway is turned on. The Power LED will
next flash green for a few seconds, and then it will be solidly lit when the self-test is complete. If the LED
flashes for one minute or longer, see “Appendix A: Troubleshooting.”
4. Power on one of the computers on your wireless network(s).
5. For initial access to the Gateway through a wireless connection, make sure the computer’s wireless adapter
has its SSID set to linksys (the Gateway’s default setting), and its wireless security is disabled. After you have
accessed the Gateway, you can change the Gateway and this computer’s adapter settings to match your usual
network settings.
Figure 4-5: Connect the Power
Go to “Chapter 5: Configuring the Wireless-G ADSL Gateway.”
NOTE: You should always change the SSID from its
default, linksys, and enable wireless security.
Chapter 4: Connecting the Wireless-G ADSL Gateway
Wireless Connection to a Computer
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Chapter 5: Configuring the Wireless-G ADSL Gateway
Overview
Follow the steps in this chapter and use the Gateway’s Web-based utility to configure the Gateway. This chapter
will describe each web page in the Utility and each page’s key functions. The utility can be accessed via your Web
browser through use of a computer connected to the Gateway. For a basic network setup, most users only have to
use the following screens of the Utility:
HAVE YOU: Enabled TCP/IP on your
computers? Computers communicate over the
network with this protocol. Refer to Windows
Help for more information on TCP/IP.
• Basic Setup. On the Basic Setup screen, enter the settings provided by your ISP.
• Management. Click the Administration tab and then the Management tab. The Gateway’s default username
and password is admin. To secure the Gateway, change the Password from its default.
NOTE: For added security, you should change
the password through the Administration tab.
There are seven main tabs: Setup, Wireless, Security, Access Restriction, Applications & Gaming, Administration,
and Status. Additional tabs will be available after you click one of the main tabs.
Setup
• Basic Setup. Enter the Internet connection and network settings on this screen.
• DDNS. Use this screen to enable and configure the Dynamic Domain Name System (DDNS) feature.
• Advanced Routing. On this screen, you can alter NAT and routing configurations.
Wireless
• Basic Wireless Settings. You can choose your wireless network settings on this screen.
• Wireless Security. Configure your wireless security settings on this screen.
• Wireless Access. This screen lets you control access to your wireless network.
• Advanced Wireless Settings. On this screen you can access the advanced wireless network settings.
Security
• Firewall. Use this screen to disable or enable the firewall, set up filters, and block WAN requests.
• VPN. On this screen you can control VPN passthrough and set up IPSec VPN tunnels.
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Access Restriction
• Internet Access. This screen allows you to control the Internet usage and traffic on your local network.
Applications & Gaming
vpn (virtual private network): a security
measure to protect data as it leaves one
network and goes to another over the Internet.
• Single Port Forwarding. Use this screen to set up common services or applications that require forwarding on
a single port.
• Port Range Forwarding. To set up public services or other specialized Internet applications that require
forwarding on a range of ports, use this screen.
• Port Triggering. To set up triggered ranges and forwarded ranges for Internet applications, click this tab.
• DMZ. To allow one local computer to be exposed to the Internet for use of special-purpose services, use this
screen.
• QoS. Use Quality of Service (QoS) to assign different priority levels to different types of data transmissions.
Administration
• Management. On this screen, alter Gateway access, Simple Network Management Protocol (SNMP), Universal
Plug and Play (UPnP), IGMP-Proxy (IGMP stands for Internet Group Multicast Protocol), and wireless
management settings.
• Reporting. If you want to view or save activity logs, click this tab.
• Diagnostics. Use this screen to run a Ping test.
• Backup&Restore. On this screen, you can back up or restore the Gateway’s configuration.
• Factory Defaults. If you want to restore the Gateway’s factory default settings, use this screen.
• Firmware Upgrade. Click this tab if you want to upgrade the Gateway’s firmware.
• Reboot. If you need to do a hard or soft reboot of the Gateway, use this screen.
Status
• Gateway. This screen provides status information about the Gateway.
• Local Network. This provides status information about the local network.
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• Wireless. This screen provides status information about the wireless network.
• DSL Connection. This screen provides status information about the DSL connection.
How to Access the Web-based Utility
To access the web-based utility, launch Internet Explorer or Netscape Navigator, and enter the Gateway’s default
IP address, 192.168.1.1, in the Address field. Then press Enter.
Figure 5-1: Login Screen
A login screen will appear (Windows 2000 users will see a similar screen). Enter admin (the default user name) in
the User Name field, and enter admin (the default password) in the Password field. Then click the OK button.
The Setup Tab
The Basic Setup Tab
The first screen that appears is the Basic Setup tab. This tab allows you to change the Gateway's general
settings. Change these settings as described here and click the Save Settings button to save your changes, or
click the Cancel Changes button to cancel your changes.
Internet Setup
• PVC Connection. If your ADSL account provides more than one permanent virtual circuit (PVC), you can have
multiple, simultaneous, independent WAN connections. PVC 1 is selected and enabled by default. When you
are ready to configure another PVC, select its number here and click the Enable Now box to enable it.
• Internet Connection Type. The Gateway supports six Encapsulation methods: RFC 1483 Bridged, RFC 1483
Routed, IPoA, RFC 2516 PPPoE, RFC 2364 PPPoA, and Bridged Mode Only. Select the appropriate type of
encapsulation from the drop-down menu. Each Basic Setup screen and available features will differ
depending on what type of encapsulation you select.
• VC Settings. You will configure your Virtual Circuit (VC) settings in this section.
• Multiplexing: Select LLC or VC, depending on your ISP.
• QoS Type: Select from the drop-down menu: UBR (Unspecific Bit Rate) for applications that are non-timesensitive, such as e-mail; CBR (Continuous Bit Rate) to specify fixed bandwidth for voice or data traffic; or
VBR (Variable Bit Rate) for bursty traffic and bandwidth-sharing with other applications.
Figure 5-2: Basic Setup
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• Pcr Rate: For the Peak Cell Rate, divide the DSL line rate by 424 to get the maximum rate the sender can
send cells. Enter the rate in the field (if required by your service provider).
• Scr Rate: The Sustain Cell Rate sets the average cell rate that can be transmitted. The SCR value is
normally less than the PCR value. Enter the rate in the field (if required by your service provider).
• Autodetect: Select Enable to have the settings automatically entered, or select Disable to enter the
values manually.
• Virtual Circuit: These fields consist of two items: VPI (Virtual Path Identifier) and VCI (Virtual Channel
Identifier). Your ISP will provide the correct settings to use here for each of your PVCs.
• DSL Modulation: Your ISP can tell you if you should leave this control set to MultiMode or set it to T1.413,
G.dmt, G.lite, ADSL2, or ADSL2+.
• IP Settings. Follow the instructions in the section for your type of encapsulation.
RFC 1483 Bridged
Dynamic IP
IP Settings. Select Obtain an IP Address Automatically if your ISP says you are connecting through a dynamic
IP address.
Figure 5-3: RFC 1483 Bridged - Dynamic IP
Static IP
If you are required to use a permanent (static) IP address to connect to the Internet, then select Use the
following IP Address.
• Internet IP Address. This is the Gateway’s IP address, when seen from the WAN, or the Internet. Your ISP
will provide you with the IP Address you need to specify here.
• Subnet Mask. This is the Gateway’s Subnet Mask. Your ISP will provide you with the Subnet Mask.
• Gateway. Your ISP will provide you with the default Gateway Address, which is the ISP server’s IP address.
• Primary DNS (Required) and Secondary DNS (Optional). Your ISP will provide you with at least one DNS
(Domain Name System) Server IP Address.
• PPPoE Session. Enable this function if it is required by your ISP. PPPoE settings will appear. See “RFC 2516
PPPoE” for explanations of these settings.
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The Setup Tab
Figure 5-4: RFC 1483 Bridged - Static IP
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RFC 1483 Routed
If you are required to use RFC 1483 Routed, then select RFC 1483 Routed.
• Internet IP Address. This is the Gateway’s IP address, when seen from the WAN, or the Internet. Your ISP
will provide you with the IP Address you need to specify here.
• Subnet Mask. This is the Gateway’s Subnet Mask. Your ISP will provide you with the Subnet Mask.
• Gateway. Your ISP will provide you with the default Gateway Address, which is the ISP server’s IP address.
• Primary DNS (Required) and Secondary DNS (Optional). Your ISP will provide you with at least one DNS
(Domain Name System) Server IP Address.
Figure 5-5: RFC 1483 Routed
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IPoA
If you are required to use Internet Protocol over Asynchronous Transfer Mode, select IPoA. The related
settings are the same as for RFC 1483 Routed (see above).
RFC 2516 PPPoE
Some DSL-based ISPs use PPPoE (Point-to-Point Protocol over Ethernet) to establish Internet connections.
Check with your ISP to see if they use PPPoE. If they do, you will have to enable PPPoE.
• Service Name. If a service name is required, enter the name of your PPPoE service in this field.
• User Name and Password. Enter the User Name and Password provided by your ISP.
• Connect on Demand: Max Idle Time. You can configure the Gateway to disconnect the Internet connection
after it has been inactive for a specified period of time (Max Idle Time). If your Internet connection has
been terminated due to inactivity, Connect on Demand enables the Gateway to automatically re-establish
your connection as soon as you attempt to access the Internet again. To use this option, click the Connect
on Demand radio button. In the Max Idle Time field, enter the number of minutes you want to have
elapsed before your Internet connection terminates.
Figure 5-6: IPoA
• Keep Alive: Redial Period. If you select this option, the Gateway will periodically check your Internet
connection. If you are disconnected, then the Gateway will automatically re-establish your connection. To
use this option, click the Keep Alive radio button. In the Redial Period field, specify how often you want
the Gateway to check the Internet connection. The default Redial Period is 20 seconds.
• Second PPPoE. If your DSL account allows multiple simultaneous PPPoE streams, enable this option and
enter the required information.
Figure 5-7: RFC 2516 PPPoE
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RFC 2364 PPPoA
Some DSL-based ISPs use PPPoA (Point-to-Point Protocol over ATM) to establish Internet connections. If you
are connected to the Internet through a DSL line, check with your ISP to see if they use PPPoA. If they do, you
will have to enable PPPoA.
• User Name and Password. Enter the User Name and Password provided by your ISP.
• Connect on Demand: Max Idle Time. You can configure the Gateway to disconnect the Internet connection
after it has been inactive for a specified period of time (Max Idle Time). If your Internet connection has
been terminated due to inactivity, Connect on Demand enables the Gateway to automatically re-establish
your connection as soon as you attempt to access the Internet again. To use this option, click the Connect
on Demand radio button. In the Max Idle Time field, enter the number of minutes you want to have
elapsed before your Internet connection terminates.
Figure 5-8: RFC 2364 PPPoA
• Keep Alive: Redial Period. If you select this option, the Gateway will periodically check your Internet
connection. If you are disconnected, then the Gateway will automatically re-establish your connection. To
use this option, click the Keep Alive radio button. In the Redial Period field, specify how often you want
the Gateway to check the Internet connection. The default Redial Period is 20 seconds.
Bridged Mode Only
If you are using your Gateway as a bridge, which makes the Gateway act like a stand-alone modem, select
Bridged Mode Only. All NAT and routing settings are disabled in this mode.
Figure 5-9: Bridged Mode Only
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Optional Settings (required by some ISPs)
• Host Name and Domain Name. These fields allow you to supply a host and domain name for the Gateway.
Some ISPs require these names as identification. You may have to check with your ISP to see if your
broadband Internet service has been configured with a host and domain name. In most cases, you can leave
these fields blank.
• MTU and Size. The MTU (Maximum Transmission Unit) setting specifies the largest packet size permitted for
network transmission. Select Manual and enter the value desired in the Size field. It is recommended that
you leave this value in the 1200 to 1500 range. By default, MTU is configured automatically.
Network Setup
• Router IP. The values for the Gateway’s Local IP Address and Subnet Mask are shown here. In most cases,
keeping the default values will work.
• Local IP Address. The default value is 192.168.1.1.
• Subnet Mask. The default value is 255.255.255.0.
• Network Address Server Settings (DHCP). Configure the Gateway’s Dynamic Host Configuration Protocol
(DHCP) settings in this section.
Figure 5-10: Optional Settings
• Local DHCP Server. A Dynamic Host Configuration Protocol (DHCP) server automatically assigns an IP
address to each computer on your network for you. Unless you already have one, it is highly
recommended that you leave the Gateway enabled as a DHCP server. You can also use the Gateway in
DHCP Relay mode.
• DHCP Relay Server. If you enable the DHCP Relay mode for the Local DHCP Server setting, enter the IP
address for the DHCP server in the fields provided.
• Advanced. To have the DHCP server reserve certain IP addresses for certain machines, click Advanced,
enter each machine’s MAC address or host name along with the desired IP address, and enable the entry.
• AutoDetect LAN DHCP Server. To automatically detect the network DHCP server, select Enable.
• Starting IP Address. Enter a value for the DHCP server to start with when issuing IP addresses. This value
must be 192.168.1. 2 or greater, because the default IP address for the Gateway is 192.168.1.1.
• Maximum Number of DHCP Users. Enter the maximum number of users/clients that can obtain an IP
address. The number will vary depending on the starting IP address entered.
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The Setup Tab
Figure 5-11: Advanced DHCP
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• Client Lease Time. The Client Lease Time is the amount of time a computer will be allowed connection to
the Gateway with its current dynamic IP address. Enter the amount of time, in minutes, that the computer
will be “leased” this dynamic IP address.
• Static DNS 1-3. The Domain Name System (DNS) is how the Internet translates domain or website names
into Internet addresses or URLs. Your ISP will provide you with at least one DNS Server IP Address. You
can enter up to three DNS Server IP Addresses here. The Gateway will use these for quicker access to
functioning DNS servers.
• WINS. The Windows Internet Naming Service (WINS) converts NetBIOS names to IP addresses. If you use a
WINS server, enter that server’s IP address here. Otherwise, leave this field blank.
• Time Setting. Select the appropriate time zone. You can change the interval between Network Time Protocol
(NTP) requests (normally 3600 seconds). If desired, check the Automatically adjust clock for daylight
saving changes checkbox. To use a specific NTP server, select Manual and enter the server address.
When finished making your changes on this tab, click the Save Settings button to save these changes, or click
the Cancel Changes button to undo your changes.
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The DDNS Tab
The Gateway offers a Dynamic Domain Name System (DDNS) feature. DDNS lets you assign a fixed host and
domain name to a dynamic Internet IP address. It is useful when you are hosting your own website, FTP server, or
other server behind the Gateway.
Before you can use this feature, you need to sign up for DDNS service at DynDNS.org or TZO.com.
DDNS
DDNS Service. If your DDNS service is provided by DynDNS.org, then select DynDNS.org from the drop-down
menu. If your DDNS service is provided by TZO.com, then select TZO.com from the drop-down menu.To disable
DDNS Service, select Disabled.
Figure 5-12: DynDNS.org
DynDNS.org
• User Name, Password, and Host Name. Enter the User Name, Password, and Host Name of the account you
set up with DynDNS.org.
• Internet IP Address. The Gateway’s current Internet IP Address is displayed here. Because it is dynamic, it will
change.
• Status. The status of the DDNS service connection is displayed here.
TZO.com
• E-mail Address, Password, and Domain Name. Enter the E-mail Address, Password, and Domain Name of the
account you set up with TZO.
• Internet IP Address. The Gateway’s current Internet IP Address is displayed here. Because it is dynamic, this
will change.
• Status. The status of the DDNS service connection is displayed here.
When finished making your changes on this tab, click the Save Settings button to save these changes, or click
the Cancel Changes button to undo your changes.
Figure 5-13: TZO.com
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The Advanced Routing Tab
The Advanced Routing screen allows you to configure NAT (Network Address Translation), dynamic routing, static
routing, and PVC routing settings.
Advanced Routing
• Operating Mode. In this section, you can disable or enable the Network Address Translation (NAT) feature.
• NAT. NAT is a security feature that is enabled by default. It enables the Gateway to translate IP addresses
of your LAN to a different IP address for the Internet. To disable NAT, click the Disable button.
• Dynamic Routing. If you have one or more other gateways or routers on your network, you may need to enable
dynamic routing, static routing, or both. In dynamic routing, the Gateway learns routes to other networks by
periodically communicating with other gateways and routers using RIP, the Routing Information Protocol.
Dynamic routing lets the Gateway automatically adjust to changes in the network’s layout.
• RIP. If you have multiple routers, you may want to use RIP so the routers can exchange routing information
with each other. To use RIP, select the Enabled radio button. Otherwise, keep the default, Disabled.
Figure 5-14: Advanced Routing
• Transmit RIP Version. To transmit RIP messages, select the protocol you want: RIP1, RIP1-Compatible
(RIP1 broadcasts and RIP2 multicasts), or RIP2. If you don’t want to transmit RIP messages, select
Disable.
• Receive RIP Version. To receive RIP messages, select the protocol you want: RIP1 or RIP2. If you don’t
want to receive RIP messages, select Disable.
• Static Routing. For static routing, you input fixed routes to other networks by hand. This can be done to
ensure that information travels by the most efficient path, or to avoid the overhead of RIP. To create a static
route, change the following settings:
• Select set number. Select the number of the static route from the drop-down menu. The Gateway
supports up to 20 static route entries. If you need to delete a route, then select the entry and click the
Delete This Entry button.
• Destination IP Address. The Destination IP Address is the IP address of the remote network or host that
will be reached through the static route. Note that a network address almost always ends in 0, and a host
address never ends in 0.
• Subnet Mask. Enter the Subnet Mask (also known as the Network Mask), which determines which portion
of an IP address is the network portion, and which portion is the host portion.
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• Gateway. Enter the IP address of the gateway device that allows for contact between the Gateway and the
remote network or host.
• Hop Count. Hop Count is the number of hops to each node until the destination is reached (16 hops
maximum). Enter the Hop Count in the field provided.
• Show Routing Table. Click the Show Routing Table button to open a screen displaying how data is routed
through your local network. For each route, the Destination LAN IP address, Subnet Mask, Gateway, and
Interface are displayed. Click the Refresh button to update the information. Click the Close button to return to
the previous screen.
Figure 5-15: Routing Table
• PVC Routing Policy. If you have two or more PVCs, click the PVC Routing Setting button to configure which
outgoing traffic will be routed over which PVC. A window titled PVC Selection Table will appear. Open the
Please select Active Connection list and specify the PVC for which you will select traffic. Traffic can be
selected on the basis of the following criteria, alone or in any combination:
• Destination (IP address and address mask)
• Source (IP address and address mask, or MAC address)
• Transport protocol (TCP, UDP, or All)
• Destination port and/or source port (if protocol is set to TCP or UDP)
• Presence of a specified IEEE 802.1D user priority marker
• IEEE 802.3 Type/Length value (the value in the 13th and 14th octets of an Ethernet frame)
Figure 5-16: PVC Routing
• Presence of a specified IEEE 802.1Q virtual LAN (VLAN) ID
• Packet length between specified minimum and maximum numbers of octets
• Presence of a specified DSCP (Diffserv Code Point) value (one kind of QoS marker)
To enable the selection criteria on one row of the table, click that row’s Apply box so a check appears in it. To
disable the row’s criteria, click the box to clear it. When you have finished making changes in this window,
click the Save button to save the changes, or click the Cancel button to undo your changes. Then click Close.
You will be returned to the Advanced Routing panel.
When finished making changes in the Advanced Routing panel, click the Save Settings button to save these
changes, or click the Cancel Changes button to undo your changes.
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The Wireless Tab
The Basic Wireless Settings Tab
This screen allows you to choose your wireless network mode and wireless security.
Wireless Network
• Wireless Network Mode. If you have both 802.11g and 802.11b devices in your network, then keep the default
setting, Mixed. If you have only 802.11g devices, select G-Only. If you have only 802.11b devices, select
B-Only. If you want to disable wireless networking, select Disable.
• Wireless Network Name (SSID). Enter the name for your wireless network into the field. The SSID is the
network name shared among all devices in a wireless network. It must be identical for all devices in the
wireless network. It is case-sensitive and must not exceed 32 alphanumeric characters, which may be any
keyboard character. Linksys recommends that you change the default SSID (linksys) to a unique name of your
choice.
Figure 5-17: Basic Wireless Settings
• Wireless Channel. Select the appropriate channel from the list provided to correspond with your network
settings. All devices in your wireless network must use the same channel in order to function correctly.
Wireless clients (computers and other devices that can use a wireless network) will automatically detect the
wireless channel of the Gateway.
• Wireless SSID Broadcast. The Gateway normally broadcasts its SSID periodically so wireless clients in the
area can more easily detect the network and associate with it. To broadcast the Gateway's SSID, keep the
default setting, Enable. If you do not want to broadcast the Gateway's SSID, then select Disable.
When finished making your changes on this tab, click the Save Settings button to save these changes, or click
the Cancel Changes button to undo your changes.
The Wireless Security Tab
The Wireless Security settings configure the security of your wireless network. There are three wireless security
options supported by the Gateway: WPA Pre-Shared Key, WPA RADIUS and WEP. (WPA stands for Wi-Fi Protected
Access, which is a security standard stronger than WEP encryption. WEP stands for Wired Equivalent Privacy.
RADIUS stands for Remote Authentication Dial-in User Service.) These are briefly discussed here. For detailed
instructions on configuring wireless security for the Gateway, turn to “Appendix B: Wireless Security.” If you want
to disable wireless security, select Disable from the drop-down menu for Security Mode.
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WPA Pre-Shared Key
WPA Pre-Shared Key is also known as WPA PSK or WPA Personal. Enter a WPA Pre-Shared Key of 8-32
characters. Then enter a Group Key Renewal period, which instructs the Gateway how often it should
generate new encryption keys.
WPA RADIUS
This option, also known as WPA Enterprise, requires that a RADIUS server be connected to the network. Enter
the RADIUS server’s IP address. If the server is not using the usual RADIUS port number (1812), enter the port
number it is using. Then enter the shared key used by the RADIUS server. If you wish, you can change the Key
Renewal Timeout setting (default 3600 seconds, or one hour), which instructs the Gateway how often it
should generate new encryption keys.
Figure 5-18: WPA Pre-Shared Key
WEP
WEP is a basic encryption method that is not as secure as WPA. WEP lets you use from one to four 64-bit
encryption keys or a single 128-bit encryption key (64-bit WEP is sometimes referred to as 40-bit WEP). All
devices on the wireless network must use exactly the same key or keys. Select the desired key length from
the WEP Encryption drop-down list box.
When you use multiple keys, they must be ordered identically (that is, placed in the same numbered “slots”)
on each device. The Gateway can decrypt transmissions encrypted with any one of the keys. Use the Default
Transmit Key control to indicate which key the Gateway should use to encrypt its own transmissions.
Figure 5-19: WPA RADIUS
When you use a single key, it must be entered or generated in the Key 1 box, and the Default Transmit Key
control must be set to Key 1.
Keys must be set using “hex” (hexadecimal, that is, base 16) numeric notation. The hex digits are the
numerals 0 through 9 and the letters A through F. Settings in hex notation are not case-sensitive.
If you need to set the Gateway to communicate with devices using WEP keys set in so-called ASCII (plain-text)
format, consult a hexadecimal ASCII chart to find the hex values of the characters. To give an example of such
a conversion, a key consisting of the string GHIJK in ASCII format would be 4748494a4b in hex format. (Two
hex digits are required for every character of a key in ASCII format.)
You can generate keys by typing an alphanumeric passphrase up to 32 characters long and clicking the
Generate button. The passphrase setting is case-sensitive, although the resulting key settings are not. The
same passphrase will generate the same keys on all Linksys products, but not on non-Linksys products with
a Passphrase function. Copy generated keys manually to use them on such products.
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The Wireless Tab
Figure 5-20: WEP
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You can also input the key or keys manually, by typing in the key input boxes. 64-bit keys must be made up of
exactly 10 hex digits, while a 128-bit key must be made up of exactly 26 hex digits.
When finished making your changes on this tab, click the Save Settings button to save these changes, or click
the Cancel Changes button to undo your changes. For detailed instructions on configuring wireless security for
the Gateway, turn to “Appendix B: Wireless Security.”
The Wireless Access Tab
Wireless Network Access
Wireless Network Access. Select Allow All you want all computers to have access to the wireless network. To
restrict access to the network, select Restrict Access, and then select Prevent to block access for the
designated computers or Permit only to permit access for the designated computers. Click the Edit MAC
Address Access List button, and the Mac Address Filter List screen will appear.
Enter the MAC addresses of the computers you want to designate. To see a list of MAC addresses for wireless
computers or clients, click the Wireless Client MAC List button.
Figure 5-21: Wireless Network Access
The Wireless Client MAC List screen will list computers, their IP addresses, and their MAC addresses. Click the
Refresh button to get the most up-to-date information. To add a specific computer to the Mac Address Filter List,
click the Enable MAC Filter checkbox and then the Update Filter List button. Click the Close button to return to
the Wireless Client MAC List screen.
On the Wireless Client MAC List screen, click the Save Settings button to save this list, or click the Cancel
Changes button to remove your entries.
When finished making your changes on this tab, click the Save Settings button to save these changes, or click
the Cancel Changes button to undo your changes.
Figure 5-22: MAC Address Filter List
Figure 5-23: Wireless Client MAC List
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The Advanced Wireless Settings Tab
Advanced Wireless
On this screen you can access the advanced wireless features, including Authentication Type, Control TX Rate,
Beacon Interval, DTIM Interval, Fragmentation Threshold, and RTS Threshold.
• Authentication Type. The default is set to Auto, which allows either Open System or Shared Key
authentication to be used. For Open System authentication, the sender and the recipient do not use a WEP
key for authentication but can use WEP for data encryption. For Shared Key authentication, the sender and
recipient use a WEP key for both authentication and data encryption. To only allow Shared Key authentication,
select Shared Key. It is recommended that this option be left in the default (Auto) mode, because some
clients cannot be configured for Shared Key.
• Control Tx Rates The default transmission rate is Auto. The rate should be set depending on the speed of your
wireless network. Select from a range of transmission speeds, or keep the default setting, Auto, to have the
Gateway automatically use the fastest possible data rate and enable the Auto-Fallback feature. Auto-Fallback
will negotiate the best possible connection speed between the Gateway and a wireless client.
Figure 5-24: Advanced Wireless Settings
• Beacon Interval. The default value is 100. The Beacon Interval value indicates the frequency interval of the
beacon. A beacon is a packet broadcast by the Gateway to synchronize the wireless network.
• DTIM Interval. The default value is 1. This value indicates the interval of the Delivery Traffic Indication
Message (DTIM). A DTIM field is a countdown field informing clients of the next window for listening to
broadcast and multicast messages. When the Gateway has buffered broadcast or multicast messages for
associated clients, it sends the next DTIM with a DTIM Interval value. Its clients hear the beacons and awaken
to receive the broadcast and multicast messages.
• Fragmentation Threshold. This value should remain at its default setting of 2346. It specifies the maximum
size for a packet before data is fragmented into multiple packets. If you experience a high packet error rate,
you may slightly increase the Fragmentation Threshold. Setting the Fragmentation Threshold too low may
result in poor network performance. Only minor modifications of this value are recommended.
• RTS Threshold. This value should remain at its default setting of 2347. If you encounter inconsistent data
flow, only minor modifications are recommended. If a network packet is smaller than the preset RTS
threshold size, the RTS/CTS mechanism will not be enabled. The Gateway sends Request to Send (RTS)
frames to a particular receiving station and negotiates the sending of a data frame. After receiving an RTS, the
wireless station responds with a Clear to Send (CTS) frame to acknowledge the right to begin transmission.
When finished making your changes on this tab, click the Save Settings button to save these changes, or click
the Cancel Changes button to undo your changes.
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The Security Tab
The Security tab gives you access to firewall and VPN (virtual private network) settings.
The Firewall Tab
This panel shows firewall and filter settings. Use these features to enhance the security of your network.
Firewall
You can enable or disable the firewall, select filters to block specific Internet data types, and block anonymous
Internet requests.
To use the firewall, click Enable. If you do not want to use the firewall, click Disable.
Additional Filters
• Filter Proxy. Use of WAN proxy servers may compromise the Gateway's security. Denying Filter Proxy will
disable access to any WAN proxy servers. To enable proxy filtering, click the checkbox.
• Filter Cookies. A cookie is data stored on your computer and used by Internet sites when you interact with
them. To enable cookie filtering, click the checkbox.
Figure 5-25: Firewall
• Filter Java Applets. Java is a programming language for websites. If you deny Java Applets, you run the risk
of not having access to Internet sites created using this programming language. To enable Java Applet
filtering, click the checkbox.
• Filter ActiveX. ActiveX is a programming language for websites. If you deny ActiveX, you run the risk of not
having access to Internet sites created using this programming language. To enable ActiveX filtering, click the
checkbox.
Block WAN Requests
• Block Anonymous Internet Requests. This keeps your network from being “pinged” or detected and
reinforces your network security by hiding your network ports, so it is more difficult for intruders to discover
your network. Select Block Anonymous Internet Requests to block anonymous Internet requests or deselect it to allow anonymous Internet requests.
If you want to see activity logs for your security measures, then click the View Logs button. Click the Clear
button to clear the log information. Click the pageRefresh button to refresh the information. Click the Previous
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Figure 5-26: Firewall Log
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Page button to go to the previous page of information. Click the Next Page button to move to the next page of
information.
When finished making your changes on this tab, click the Save Settings button to save these changes, or click
the Cancel Changes button to undo your changes.
The VPN Tab
This panel shows VPN (virtual private network) settings. You can disable or enable passthrough for four kinds of
VPNs. You can also set up IPSec (Internet Protocol Security) VPN tunnels for secure remote access.
VPN Passthrough
Virtual Private Networking (VPN) is a security measure that basically creates a secure connection between two
remote locations. Configure these settings so the Gateway will permit VPN tunnels to pass through.
• IPSec Passthrough. Internet Protocol Security (IPSec) is a suite of protocols used to implement secure
exchange of packets at the IP layer. To allow IPSec Passthrough, click the Enable button. To disable IPSec
Passthrough, click the Disable button.
• PPPoE Passthrough. PPPoE Passthrough allows your PC(s) to use the PPPoE client software provided by your
ISP. Some ISPs may request that you use this feature on the Gateway. To allow PPPoE Passthrough, click the
Enable button. To disable PPPoE Passthrough, click the Disable button.
• PPTP Passthrough. Point-to-Point Tunneling Protocol Passthrough is the method used to enable VPN sessions
to a Windows NT 4.0 or 2000 server. To allow PPTP Passthrough, click the Enable button. To disable PPTP
Passthrough, click the Disable button.
• L2TP Passthrough. Layering 2 Tunneling Protocol Passthrough is an extension of the Point-to-Point Tunneling
Protocol (PPTP) used to enable the operation of a VPN over the Internet.To allow L2TP Passthrough, click the
Enable button. To disable L2TP Passthrough, click the Disable button.
IPSec VPN Tunnel
Use this section of the VPN panel to set up, enable, and disable secure IPSec tunnels between the Gateway and
remote IPSec gateways and clients. Note that you must have a working ADSL connection to complete the settings
in this section.
Figure 5-27: VPN
• Select Tunnel Entry: You can enable up to five IPSec tunnels. Each has a number and a name. Use this
control to select the one you want to enable, disable, edit, or delete.
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• Delete: Click this button to delete the selected tunnel.
• Summary: Click this button to see a summary of your IPSec settings and the tunnels’ status.
• IPSec VPN Tunnel: Click Enabled to enable the selected tunnel, or Disabled to disable it.
Figure 5-28: VPN Settings Summary
• Tunnel Name: Click and type in this box to give the selected tunnel a name. A name is required, but is only
for your reference and need not match the name used at the remote gateway or client.
• Local Secure Group: To give an entire local network access to the tunnel, select Subnet and enter the network
address and mask. To give a particular host access to the tunnel, select IP Address and enter the host’s
address and mask.
• Local Security Gateway: If you have multiple PVCs, open this list and select the PVC you wish to use for the
VPN tunnel.
• Remote Secure Group: Use this control to specify the remote device or devices that will be granted access to
the tunnel. This can be the public IP address of a network or host; the IP address and mask of a remote
subnet; Host, that is, identical to the Remote Security Gateway setting; or Any, which allows any device with
permission from the remote security gateway to access the tunnel.
• Remote Security Gateway: Use the controls in this section to specify the remote endpoint of the IPSec tunnel,
whether it will be a gateway or a client. Select IP Address or FQDN (fully qualified domain name) and input
the correct address or name; or select Any, which allows any machine with the correct IPSec settings to act
as the remote endpoint of the tunnel.
• Encryption: To have communication through the tunnel encrypted, select DES (Data Encryption Standard)
or 3DES (Triple DES). To leave communication unencryped, select Disable.
• Authentication: Authentication verifies the identity of the remote machine and the integrity of the data
received. Set this control to MD5 (Message Digest 5) or SHA (Secure Hash Algorithm). SHA is newer, and
generally considered more secure, than MD5.
• Key Management: A key is a string of letters and/or numbers that is used for authentication or encryption. Key
management can be automatic (performed by IKE, the Internet Key Exchange protocol) or manual.
• To use automatic key management, select Auto.(IKE), enter the pre-shared key and the key lifetime, and
enable or disable PFS (perfect forward secrecy). The key should be a string of 8 to 23 characters
representing no dictionary word or numeric pattern. PFS enhances security by enabling automatic rekeying. The settings must exactly match those at the remote end of the tunnel.
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• To use manual key management, select Manual, enter authentication and encryption keys (these must be
identical to those entered at the remote end), and enter inbound and outbound SPIs (security parameter
indexes). The SPIs must be exactly complementary to those entered at the remote end.
When you select automatic key management, an Advanced Settings button appears. Click this button if there are
special requirements for this IPSec tunnel. The Advanced IPSec VPN Tunnel Setup window will appear. (Help for
this window can be displayed by clicking More on the right side of the VPN panel.)
In this window you can set parameters for IKE phases 1 and 2, and other settings. Phase 1 is when the two ends
negotiate parameters for key exchange; phase 2 is when they negotiate parameters for data exchange.
• Operation mode: Key exchange parameters can be negotiated in Main mode, which is more secure, or
Aggressive mode, which is quicker. The Gateway will accept requests in either mode, but some gateways
and clients will accept requests only in the mode specified by the user.
• Proposal 1: A proposal is a set of parameters that the initiator sends and the responder examines for
acceptability. You can specify encryption and authentication algorithms, Diffie-Hellman group, and key
lifetime for the first proposal.
• Phase 2 Proposal: Select the desired Diffie-Hellman group, 768-bit or 1024-bit.
• Other Settings
NAT Traversal: Enable this feature if the machine or machines being accessed through the tunnel stand
behind a NAT (Network Address Translation) server.
NetBIOS broadcast: Enable this feature if the local network does not include a WINS server and the remote
machine or machines will need to find local machines by their NetBIOS (Windows Networking) names.
Anti-replay: Packets sent through an IPSec tunnel contain sequencing numbers to let the receiver detect if
a substitution has occurred. You can enable this function for greater security.
Figure 5-29: Advanced IPSec Settings
Keep-alive: This feature, enabled by default, makes the Gateway check the tunnel connection periodically
and attempt to re-establish it if it goes down.
If IKE failed . . . : IKE failure may signify an unwanted intrusion attempt. You can set a limit on the number
of consecutive failed requests that the Gateway will allow from the same IP address, and the amount of
time that the Gateway will ignore further requests from that address.
When finished making changes in this panel, click the Save Settings button to save your changes, or click
Cancel Changes to undo the changes. Use the VPN panel’s Connect and View Logs buttons to test the tunnel.
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Figure 5-30: VPN Log
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The Access Restriction Tab
The Internet Access Tab
The Internet Access screen allows you to block or allow specific kinds of Internet usage. You can set up Internet
access policies for specific computers and block websites by URL address or keyword.
Internet Access Policy. Access can be managed by a policy. Use the settings on this screen to establish an
access policy (after the Save Settings button is clicked). Selecting a policy from the drop-down menu will
display that policy’s settings. To delete a policy, select that policy’s number and click the Delete button. To view
all the policies, click the Summary button. (Policies can be deleted from the Summary screen by selecting the
policy or policies and clicking the Delete button. To return to the Internet Access screen, click the Close button.)
Status. Policies are disabled by default. To enable a policy, select the policy number from the drop-down menu,
and click the radio button beside Enable.
To create an Internet Access policy:
1. Select a number from the Internet Access Policy drop-down menu.
2. To enable this policy, click the radio button beside Enable.
3. Enter a Policy Name in the field provided.
Figure 5-31: Internet Access
Figure 5-32: Internet Policy Summary
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4. Click the Edit List of PCs button to select which PCs will be affected by the policy. The List of PCs screen will
appear. You can select a PC by MAC Address or IP Address, and you can enter a range of IP Addresses to
select a group of PCs. You can also make the policy apply for particular WAN IP addresses. After making your
changes, click the Save Settings button to apply your changes or Cancel Changes to cancel your changes.
5. Click the appropriate option, Deny or Allow, depending on whether you want to block or allow Internet access
for the PCs you listed on the List of PCs screen.
6. Decide which days and what times you want this policy to be enforced. Select the individual days during
which the policy will be in effect, or select Everyday. Then enter a range of hours and minutes during which
the policy will be in effect, or select 24 Hours.
7. If you want to block websites with specific URL addresses, enter each URL in a separate field next to Website
Blocking by URL Address.
8. If you want to block websites using specific keywords, enter each keyword in a separate field next to Website
Blocking by Keyword.
9. You can filter access to various services accessed over the Internet, such as FTP or telnet, by selecting
services from the drop-down menus next to Blocked Services.
Then enter the range of ports you want to filter.
If the service you want to block is not listed or you want to edit a service’s settings, then click the Add/Edit
Service button. Then the Port Services screen will appear.
To add a service, enter the service’s name in the Service Name field. Select its protocol from the Protocol
drop-down menu, and enter its range in the Port Range fields. Then click the Add button.
Figure 5-33: List of PCs
To modify a service, select it from the list on the right. Change its name, protocol setting, or port range. Then
click the Modify button.
To delete a service, select it from the list on the right. Then click the Delete button.
When you are finished making changes on the Port Services screen, click the Apply button to save changes.
If you want to cancel your changes, click the Cancel button. To close the Port Services screen and return to
the Access Restrictions screen, click the Close button.
10. Click the Save Settings button to save the policy’s settings. To undo the policy’s settings, click the Cancel
Changes button.
Figure 5-34: Add/Edit Service
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The Applications & Gaming Tab
The Single Port Forwarding Tab
Single Port Forwarding
Use the Single Port Forwarding screen when you want to open a specific port so users on the Internet can see the
servers behind the Gateway (such servers may include FTP or e-mail servers). When users send this type of
request to your network via the Internet, the Gateway will forward those requests to the appropriate computer.
Any computer whose port is being forwarded should have its DHCP client function disabled and should have a
new static IP address assigned to it because its IP address may change when using the DHCP function.
• PVC Connection Select. If the service requests you wish to configure will be coming in over a PVC other than
PVC 1, select the correct PVC from this list.
• Port Map List. In this section you will customize the port service for your applications.
• Application. Enter the name of the application in the field provided.
• External Port and Internal Port. Enter the External and Internal Port numbers.
• Protocol. Select the protocol you wish to use for each application: TCP or UDP.
Figure 5-35: Single Port Forwarding
• IP Address. Enter the IP Address of the appropriate computer.
• Enabled. Click Enabled to enable forwarding for the chosen application.
When finished making your changes on this tab, click the Save Settings button to save these changes, or click
the Cancel Changes button to undo your changes.
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The Port Range Forwarding Tab
The Port Range Forwarding screen sets up public services on your network, such as web servers, ftp servers, email servers, or other specialized Internet applications. (Specialized Internet applications are any applications
that use Internet access to perform functions such as videoconferencing or online gaming. Some Internet
applications may not require any forwarding.)
When users send this type of request to your network via the Internet, the Gateway will forward those requests to
the appropriate computer. Any computer whose port is being forwarded should have its DHCP client function
disabled and should have a new static IP address assigned to it because its IP address may change when using
the DHCP function.
• Application. Enter the name of the application in the field provided.
• Start and End. Enter the starting and ending numbers of the port range you wish to forward.
• Protocol. Select the protocol you wish to use for each application: TCP, UDP, or Both.
Figure 5-36: Port Range Forwarding
• IP Address. Enter the IP Address of the appropriate computer.
• Enable. Click the Enable checkbox to enable forwarding for the chosen application.
When finished making your changes on this tab, click the Save Settings button to save these changes, or click
the Cancel Changes button to undo your changes.
The Port Triggering Tab
Port Triggering is used for special applications that can request a port to be opened on demand. For this feature,
the Gateway will watch outgoing data for specific port numbers. The Gateway will remember the IP address of the
computer that sends a transmission requesting data, so that when the requested data returns through the
Gateway, the data is pulled back to the proper computer by way of IP address and port mapping rules.
• Application. Enter the name you wish to give each application.
• Triggered Range. Enter the starting and ending port numbers of the Triggered Range.
• Forwarded Range. Enter the starting and ending port numbers of the Forwarded Range.
• Enable. Click the Enable checkbox to enable port triggering for the chosen application.
When finished making your changes on this tab, click the Save Settings button to save these changes, or click
the Cancel Changes button to undo your changes.
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Figure 5-37: Port Triggering
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The DMZ Tab
The DMZ screen allows one local user to be exposed to the Internet for use of a special-purpose service such as
Internet gaming and videoconferencing through DMZ Hosting. DMZ hosting forwards all the ports for one
computer at the same time, which differs from Port Range Forwarding, which can only forward a maximum of 10
ranges of ports.
• DMZ Hosting. This feature allows one local user to be exposed to the Internet for use of a special-purpose
service such as Internet gaming and videoconferencing. To use this feature, select Enable. To disable DMZ,
select Disable.
Figure 5-38: DMZ
• DMZ Host IP Address. To expose one computer, enter the computer’s IP address. To get the IP address of a
computer, refer to “Appendix C: Finding the MAC Address and IP Address for Your Ethernet Adapter.”
When finished making your changes on this tab, click the Save Settings button to save these changes, or click
the Cancel Changes button to undo your changes.
The QoS Tab
QoS
Quality of Service (QoS) ensures better service to high-priority types of network traffic, which may involve
demanding, real-time applications, such as Internet phone calls or videoconferencing.
Enabled/Disabled. To use QoS, select Enable. Otherwise, keep the default, Disable.
PVC QoS Priority
PVC-based QoS assigns different levels of priority, or precedence, to different permanent virtual circuits. This is
useful when you have, for example, one PVC set up for traditional Internet services (Web browsing, e-mail, and
the like) and another PVC set up to carry time-sensitive data such as VoIP or IPTV streams. Giving the second PVC
a higher QoS level helps ensure the best possible voice or picture quality.
Figure 5-39: QoS
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Edit list of QoS Settings
In addition to PVC-based QoS, you can assign different levels of priority to different packets based on information
in the packets. To do this, click the Edit list of QoS Settings button. A window titled QoS Function will appear.
This window lets you set the priority for packets selected by any of the following criteria, alone or in combination:
• Destination (IP address and address mask, fully qualified domain name, or MAC address)
• Source (IP address and address mask, or MAC address)
• Transport protocol (TCP, UDP, or All)
• Destination port and/or source port (if protocol is set to TCP or UDP)
Figure 5-40: Edit List of QoS Settings
• Ethernet Type value (the value in the 13th and 14th octets of an Ethernet frame)
• Triggering of a particular application layer gateway (FTP, TFTP, H.323, IRC, MMS, GRE, PPTP, or SIP)
• Presence of a specified IEEE 802.1D user priority marker
• Presence of a specified IEEE 802.1Q virtual LAN (VLAN) ID
• Packet length between specified minimum and maximum numbers of octets.
Fragment packets’ size of AF and BE traffic to be equal to the size of EF traffic: Enable this option and input a
packet size to have large Assured Forwarding (medium priority) and Best Effort (low priority) packets fragmented
so they will not uduly delay Expedited Forwarding (high priority) packets. The value you enter should be from 68
to 1492.
When you have finished making changes in this window, click the Save button to save the changes, or click the
Cancel button to undo your changes. Then click Close. You will be returned to the QoS panel. Click the Save
Settings button to save your changes, or click the Cancel Changes button to undo your changes.
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The Administration Tab
The Management Tab
The Management screen allows you to change the Gateway’s access settings as well as configure the SNMP
(Simple Network Management Protocol), UPnP (Universal Plug and Play), IGMP (Internet Group Multicast
Protocol)-Proxy, and WLAN management features.
Gateway Access
Local Gateway Access. To ensure the Gateway’s security, you will be asked for your password when you access
the Gateway’s Web-based Utility. The default username and password is admin.
• Gateway Username. Enter the default username, admin. It is recommended that you change the default
username to one of your choice.
• Gateway Password. It is recommended that you change the default password, admin, to one of your choice.
• Re-enter to confirm. Re-enter the Gateway’s new Password to confirm it.
Remote Gateway Access. This feature allows you to access the Gateway from a remote location, via the Internet.
• Remote Management. This feature allows you to manage the Gateway from a remote location via the Internet.
To enable Remote Management, click Enable.
IMPORTANT: Enabling remote management allows anyone with your password to configure the
Gateway from somewhere else on the Internet.
• Remote Username. The default username for remove management is tech. It is recommended that you
change the remote username to one of your own choosing.
• Remote Password. The default remote password is admin. It is recommended that you change this to a
password of your own choosing.
• Re-enter to confirm. Re-enter the new remote password to confirm it.
• Management Port. Enter the port number you will use to remotely access the Gateway.
Figure 5-41: Management
• Allowed IP. Specify the IP address(es) allowed to remotely manage the Gateway. To allow all IP addresses with
no restrictions, select All. To specify a single IP address, select IP address and enter the IP address in the
Figure 5-42: Allowed IP - IP Range
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fields provided. To specify a range of IP addresses, select IP range and enter the range of IP addresses in the
fields provided.
• Use https. Clear this check box if you do not want to use HTTPS encryption on remote management links.
Remote Upgrade. This feature allows the Gateway’s firmware to be upgraded remotely by a TFTP server. To
enable Remote Upgrade, click Enable.
SNMP
SNMP is a popular network monitoring and management protocol. To enable SNMP, click Enabled. To disable
SNMP, click Disabled.
If enabled, then specify the IP address(es) allowed to have SNMP access. Select All to allow all IP addresses with
no restrictions, IPaddr to specify a single IP address, or IP range to specify a range of IP addresses.
• Device Name. Enter the name of the Gateway.
• SNMP v1/v2: Get Community. Enter the password that allows read-only access to the Gateway’s SNMP
information.
• Set Community. Enter the password that allows read/write access to the Gateway’s SNMP information.
• SNMP V3. Click Enable if you wish to manage the Gateway using SNMP version 3.
• Rw User. Enter a name for the user who will have read/write access to the Gateway’s settings. The default
name is v3rwuser.
• Authentication protocol and password. Select an authentication protocol and enter a password. It is
recommended that the password be at least eight characters long.
• Privacy protocol and password. To enable encryption of SNMP version 3 communications, select CBC-DES
and enter a password. If encryption is not desired, select None.
• Trap Management: Trap to. Enter the IP address of the remote host computer that will receive the trap
messages.
UPnP
UPnP allows Windows Me and XP to automatically configure the Gateway for various Internet applications, such
as gaming and videoconferencing.
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• UPnP. To enable UPnP, click Enable. Otherwise, click Disable.
• Please select a PVC connection to bind. Select the number of the PVC over which the applications requiring
UPnP will run.
IGMP-Proxy
If your multimedia application or device is not working properly behind the Gateway, then you can enable IGMPProxy to allow multicast traffic through the Gateway.
• PVC Available. Select the number of the PVC over which you wish IGMP-Proxy to work.
• IGMP Proxy. To use this feature, select Enable. Otherwise, select Disable.
IGMP-Snooping
The multicast packets used by some multimedia applications are treated as broadcast packets and sent to all of
the Gateway’s LAN ports. If this results in too much traffic going to ports over which the application is not being
used, you can enable IGMP snooping to ensure correct routing of multicast traffic.
• IGMP Snooping. To use this feature, select Enable. Otherwise, select Disable.
TRO64
• TR-064. To use this feature, select Enable. Otherwise, select Disable.
WLAN
• Management via WLAN. This feature allows the Gateway to be managed by a wireless computer on the local
network when it logs into the Gateway’s Web-based Utility.
Telnet
• Telnet. A terminal emulation protocol commonly used on Internet and TCP/IP-based networks. It allows a user
at a terminal or computer to log onto a remote device and run a program. To use this feature, select Enable.
Otherwise, select Disable.
When finished making your changes on this tab, click the Save Settings button to save these changes, or click
the Cancel Changes button to undo your changes.
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The Reporting Tab
The Reporting screen provides you with a log of all incoming and outgoing URLs or IP addresses for your Internet
connection. It also provides logs for VPN and firewall events.
Reporting
• Log. To enable log reporting, click Enable.
• Logviewer IP Address. Enter the IP Address of the computer that will receive logs. You will need Logviewer
software to view these logs. This free software is available for download from www.linksys.com.
Email Alerts
• E-Mail Alerts. To enable E-Mail Alerts, click Enable.
Figure 5-43: Reporting
• Denial of Service Thresholds. Enter the number of Denial of Service attacks that will trigger an e-mail alert.
• SMTP Mail Server. Enter the IP address of the SMTP server.
• E-Mail Address for Alert Logs. Enter the e-mail address that will receive alert logs.
• Return E-Mail address. Enter the return address for the e-mail alerts.
To view the logs, click the View Logs button. A new screen will appear. From the drop-down menu, you can
select which log you want to view. Click the Clear button to clear the log information. Click the pageRefresh
button to refresh the information. Click the Previous Page button to go to the previous page of information. Click
the Next Page button to move to the next page of information.
Figure 5-44: System Log
When finished making your changes on this tab, click the Save Settings button to save these changes, or click
the Cancel Changes button to undo your changes.
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The Diagnostics Tab
Ping Test
Ping Test Parameters
• Ping Target IP. Enter the IP address that you want to ping. This can be either a local (LAN) IP or an Internet
(WAN) IP address.
• Ping Size. Enter the size of the packet.
• Number of Pings. Enter the number of times that you want to ping.
• Ping Interval. Enter the ping interval (how often the target IP address will be pinged) in milliseconds.
Figure 5-45: Ping Test
• Ping Timeout. Enter the ping timeout (how long before the ping test times out) in milliseconds.
Click the Start Test button to start the Ping Test.Ping Result. The results of the ping test will be shown here.
When finished making your changes on this tab, click the Save Settings button to save these changes, or click
the Cancel Changes button to undo your changes.
The Backup&Restore Tab
The Backup&Restore tab allows you to back up and restore the Gateway’s configuration file.
Backup Configuration
To back up the Gateway’s configuration file, click the Backup button. Then follow the on-screen instructions.
Restore Configuration
To restore the Gateway’s configuration file, click the Browse button. Then follow the on-screen instructions to
locate the file. After you have selected the file, click the Restore button.
Figure 5-46: Backup&Restore
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The Factory Defaults Tab
Restore Factory Defaults. If you wish to restore the Gateway to its factory default settings and lose all your
settings, click Yes.
To begin the restore process, click the Save Settings button to save these changes, or click the Cancel Changes
button to undo your changes.
The Firmware Upgrade Tab
Figure 5-47: Factory Defaults
The Gateway allows you to upgrade firmware from the LAN (Local Area Network) side of the Gateway.
Upgrade from LAN
To upgrade the Gateway’s firmware from the LAN:
1. Download the Gateway’s firmware upgrade file from www.linksys.com.
1. Extract the file on your computer.
1. Click the Browse button to find the firmware upgrade file.
2. Double-click the firmware file that you have downloaded and extracted.
3. Click the Upgrade button, and follow the on-screen instructions.
Figure 5-48: Firmware Upgrade
To cancel the firmware upgrade, click the Cancel Upgrade button.
The Reboot Tab
This screen allows you to do a soft or hard reboot of the Gateway. In most cases you should use the hard reboot.
The soft reboot is similar to restarting your computer without physically powering down the computer.
Reboot
Reboot Mode. To reboot your Gateway, select Hard or Soft. Choose Hard to power cycle the Gateway or Soft. to
restart it without a power cycle.
Figure 5-49: Reboot
To begin the reboot process, click the Save Settings button. When a screen appears asking you if you really want
to reboot the Gateway, click OK.
Click the Cancel Changes button if you want to cancel the reboot.
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The Status Tab
The Gateway Tab
This screen displays information about the Gateway and its Internet connection.
Gateway Information
This section displays the Gateway’s Firmware Version, MAC Address, and (if an NTP server has been contacted)
Current Time.
Internet Connection
This section shows the following information: the Connection, Login Type, Interface, IP Address, Subnet Mask,
Default Gateway, DNS 1, 2, and 3 server IP addresses, and WINS address. Depending on the login type, other
information about the connection may also appear.
Connect and Disconnect buttons appear when an ADSL connection is available. Use these buttons to bring the
connection up or down.
Figure 5-50: Gateway
Click the Refresh button if you want to refresh the displayed information.
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The Local Network Tab
The Local Network information that is displayed is the local Mac Address, IP Address, Subnet Mask, DHCP Server,
Start IP Address, and End IP Address. To view the DHCP Clients Table, click the DHCP Client Table button. To view
the ARP/RARP Table, click the ARP/RARP Table button.
DHCP Clients Table. The DHCP Active IP Table shows the current DHCP Client data. You will see the computer
name, IP address, MAC address, and expiration time of the dynamic IP address for the wireless clients using the
DHCP server. (This data is stored in temporary memory and changes periodically.) Click the Refresh button if you
want to refresh the displayed information. To delete a client from the DHCP server, select the client, and then click
the Delete button. Click the Close button to return to the Local Network screen.
ARP/RARP Table. The ARP/RARP Table shows the current data for the local network clients that have sent an ARP
request to the Gateway. You will see their IP addresses and MAC addresses. (This data is stored in temporary
memory and changes periodically.) An ARP request is a request sent by the Gateway asking clients with IP
addresses for their MAC addresses, so the Gateway can map IP addresses to MAC addresses. RARP is the reverse
of ARP. Click the Refresh button if you want to refresh the displayed information. Click the Close button to return
to the Local Network screen.
Figure 5-51: Local Network
Click the Refresh button if you want to refresh the displayed information.
Figure 5-52: DHCP Active IP Table
Figure 5-53: ARP/RARP Table
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The Wireless Tab
The Wireless network information that is displayed is the Wireless Firmware Version, MAC Address, Mode, SSID,
DHCP Server, Channel, and Encryption Function.
Click the Wireless Clients Connected button to view a list of the wireless clients connected to the Gateway,
along with their computer names, IP addresses, and MAC addresses. Click the Refresh button if you want to
refresh the displayed information. Click the Close button to return to the Wireless screen.
Click the Refresh button if you want to refresh the displayed information.
Figure 5-54: Wireless
Figure 5-55: Networked Computers
Chapter 5: Configuring the Wireless-G ADSL Gateway
The Status Tab
48
Wireless-G ADSL Gateway
The DSL Connection Tab
This screen shows information about the DSL connection and the PVC connection.
DSL Status
This section shows the following: DSL Status, DSL Modulation Mode, DSL Path Mode, Downstream Rate,
Upstream Rate, Downstream Margin, Upstream Margin, Downstream Line Attenuation, Upstream Line
Attenuation, Downstream Transmit Power, and Upstream Transmit Power.
PVC Connection
Connection: To view information about a particular PVC, select that PVC’s number from this list.
This section displays the following information: Encapsulation, Multiplexing, QoS, Pcr Rate, Scr Rate, Autodetect,
VPI, VCI, Enable status, and PVC Status.
Click the Refresh button if you want to refresh the displayed information.
Figure 5-56: DSL Connection
Chapter 5: Configuring the Wireless-G ADSL Gateway
The Status Tab
49
Wireless-G ADSL Gateway
Appendix A: Troubleshooting
This appendix consists of two parts: “Common Problems and Solutions” and “Frequently Asked Questions.”
Provided are possible solutions to problems that may occur during the installation and operation of the Gateway.
Read the descriptions below to help you solve your problems. If you can’t find an answer here, check the Linksys
international website at www.linksys.com/international.
Common Problems and Solutions
1. I need to set a static IP address on a computer.
You can assign a static IP address to a computer by performing the following steps:
• For Windows 98 and Me:
1. Click Start, Settings, and Control Panel. Double-click Network.
2. In The following network components are installed box, select the TCP/IP-> associated with your
Ethernet adapter. If you only have one Ethernet adapter installed, you will only see one TCP/IP line
with no association to an Ethernet adapter. Highlight it and click the Properties button.
3. In the TCP/IP properties window, select the IP address tab, and select Specify an IP address. Enter a
unique IP address that is not used by any other computer on the network connected to the Gateway.
Make sure that each IP address is unique for each computer or network device.
4. Click the Gateway tab, and in the New Gateway prompt, enter 192.168.1.1, which is the default IP
address of the Gateway. Click the Add button to accept the entry.
5. Click the DNS tab, and make sure the DNS Enabled option is selected. Enter the Host and Domain
names (e.g., John for Host and home for Domain). Enter the DNS entry provided by your ISP. If your
ISP has not provided the DNS IP address, contact your ISP to get that information or go to its website
for the information.
6. Click the OK button in the TCP/IP properties window, and click Close or the OK button for the Network
window.
7. Restart the computer when asked.
• For Windows 2000:
1. Click Start, Settings, and Control Panel. Double-click Network and Dial-Up Connections.
2. Right-click the Local Area Connection that is associated with the Ethernet adapter you are using, and
select the Properties option.
3. In the Components checked are used by this connection box, highlight Internet Protocol (TCP/IP), and
click the Properties button. Select Use the following IP address option.
4. Enter a unique IP address that is not used by any other computer on the network connected to the
Gateway.
5. Enter the Subnet Mask, 255.255.255.0.
6. Enter the Default Gateway, 192.168.1.1 (Gateway’s default IP address).
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Wireless-G ADSL Gateway
7. Toward the bottom of the window, select Use the following DNS server addresses, and enter the
Preferred DNS server and Alternative DNS server (provided by your ISP). Contact your ISP or go on its
website to find the information.
8. Click the OK button in the Internet Protocol (TCP/IP) Properties window, and click the OK button in the
Local Area Connection Properties window.
9. Restart the computer if asked.
• For Windows XP:
The following instructions assume you are running Windows XP with the default interface. If you are using
the Classic interface (where the icons and menus look like previous Windows versions), please follow the
instructions for Windows 2000.
1. Click Start and Control Panel.
2. Click the Network and Internet Connections icon and then the Network Connections icon.
3. Right-click the Local Area Connection that is associated with the Ethernet adapter you are using,
and select the Properties option.
4. In the This connection uses the following items box, highlight Internet Protocol (TCP/IP). Click
the Properties button.
5. Enter a unique IP address that is not used by any other computer on the network connected to the
Gateway.
6. Enter the Subnet Mask, 255.255.255.0.
7. Enter the Default Gateway, 192.168.1.1 (Gateway’s default IP address).
8. Toward the bottom of the window, select Use the following DNS server addresses, and enter the
Preferred DNS server and Alternative DNS server (provided by your ISP). Contact your ISP or go on its
website to find the information.
9. Click the OK button in the Internet Protocol (TCP/IP) Properties window. Click the OK button in the
Local Area Connection Properties window.
2. I want to test my Internet connection.
A. Check your TCP/IP settings.
For Windows 98, Me, 2000, and XP:
• Refer to Windows Help for details. Make sure Obtain IP address automatically is selected in the settings.
For Windows NT 4.0:
• Click Start, Settings, and Control Panel. Double-click the Network icon.
• Click the Protocol tab, and double-click on TCP/IP Protocol.
• When the window appears, make sure you have selected the correct Adapter for your Ethernet adapter
and set it for Obtain an IP address from a DHCP server.
• Click the OK button in the TCP/IP Protocol Properties window, and click the Close button in the Network
window.
• Restart the computer if asked.
B. Open a command prompt.
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For Windows 98 and Me:
• Click Start and Run. In the Open field, type in command. Press the Enter key or click the OK button.
For Windows NT, 2000, and XP:
• Click Start and Run. In the Open field, type cmd. Press the Enter key or click the OK button. In the
command prompt, type ping 192.168.1.1 and press the Enter key.
• If you get a reply, the computer is communicating with the Gateway.
• If you do NOT get a reply, please check the cable, and make sure Obtain an IP address automatically is
selected in the TCP/IP settings for your Ethernet adapter.
C. In the command prompt, type ping followed by your Internet or WAN IP address and press the Enter key.
The Internet or WAN IP Address can be found on the Status screen of the Gateway’s web-based utility. For
example, if your Internet or WAN IP address is 1.2.3.4, you would enter ping 1.2.3.4 and press the Enter
key.
• If you get a reply, the computer is connected to the Gateway.
• If you do NOT get a reply, try the ping command from a different computer to verify that your original
computer is not the cause of the problem.
D. In the command prompt, type ping www.yahoo.com and press the Enter key.
• If you get a reply, the computer is connected to the Internet. If you cannot open a webpage, try the ping
command from a different computer to verify that your original computer is not the cause of the problem.
• If you do NOT get a reply, there may be a problem with the connection. Try the ping command from a
different computer to verify that your original computer is not the cause of the problem.
3. I am not getting an IP address on the Internet with my Internet connection.
• Refer to “Problem #2, I want to test my Internet connection” to verify that you have connectivity.
1. Make sure you are using the right Internet connection settings. Contact your ISP to see if your Internet
connection type is RFC 1483 Bridged, RFC 1483 Routed, RFC 2516 PPPoE, or RFC 2364 PPPoA. Please
refer to the Setup section of “Chapter 5: Configuring the Wireless-G ADSL Gateway” for details on
Internet connection settings.
2. Make sure you have the right cable. Check to see if the Gateway column has a solidly lit ADSL LED.
3. Make sure the cable connecting from your Gateway’s ADSL port is connected to the wall jack of the
ADSL service line. Verify that the Status page of the Gateway’s web-based utility shows a valid IP
address from your ISP.
4. Turn off the computer and Gateway. Wait 30 seconds, and then turn on the Gateway, and computer.
Check the Status tab of the Gateway’s web-based utility to see if you get an IP address.
4. I am not able to access the Setup page of the Gateway’s web-based utility.
• Refer to “Problem #2, I want to test my Internet connection” to verify that your computer is properly
connected to the Gateway.
1. Refer to “Appendix C: Finding the MAC Address and IP address for Your Ethernet Adapter” to verify
that your computer has an IP Address, Subnet Mask, Gateway, and DNS.
2. Set a static IP address on your system; refer to “Problem #1: I need to set a static IP address.”
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3. Refer to “Problem #10: I am a PPPoE user, and I need to remove the proxy settings or the dial-up popup window.”
5. I can’t get my Virtual Private Network (VPN) working through the Gateway.
Access the Gateway’s web interface by going to http://192.168.1.1 or the IP address of the Gateway, and go
to the Security tab. Make sure you have IPsec passthrough and/or PPTP pass-through enabled.
• VPNs that use IPSec with the ESP (Encapsulation Security Payload known as protocol 50) authentication
will work fine. At least one IPSec session will work through the Gateway; however, simultaneous IPSec
sessions may be possible, depending on the specifics of your VPNs.
• VPNs that use IPSec and AH (Authentication Header known as protocol 51) are incompatible with the
Gateway. AH has limitations due to occasional incompatibility with the NAT standard.
• Change the IP address for the Gateway to another subnet to avoid a conflict between the VPN IP address
and your local IP address. For example, if your VPN server assigns an IP address 192.168.1.X (X is a
number from 1 to 254) and your local LAN IP address is 192.168.1.X (X is the same number used in the
VPN IP address), the Gateway will have difficulties routing information to the right location. If you change
the Gateway’s IP address to 192.168.2.1, that should solve the problem. Change the Gateway’s IP address
through the Setup tab of the web interface.
• If you assigned a static IP address to any computer or network device on the network, you need to change
its IP address accordingly to 192.168.2.Y (Y being any number from 1 to 254). Note that each IP address
must be unique within the network.
• Your VPN may require port 500/UDP packets to be passed to the computer that is connecting to the IPSec
server. Refer to “Problem #7, I need to set up online game hosting or use other Internet applications” for
details.
• Check the Linksys international website for more information at www.linksys.com/international.
6. I need to set up a server behind my Gateway and make it available to the public.
To use a server like a web, ftp, or mail server, you need to know the respective port numbers they are using.
For example, port 80 (HTTP) is used for web; port 21 (FTP) is used for FTP, and port 25 (SMTP outgoing) and
port 110 (POP3 incoming) are used for the mail server. You can get more information by viewing the
documentation provided with the server you installed.
• Follow these steps to set up port forwarding through the Gateway’s web-based utility. We will be setting
up web, ftp, and mail servers.
1. Access the Gateway’s web-based utility by going to http://192.168.1.1 or the IP address of the
Gateway. Go to the Applications and Gaming => Port Range Forwarding tab.
2. Enter any name you want to use for the Customized Application.
3. Enter the External Port range of the service you are using. For example, if you have a web server, you
would enter the range 80 to 80.
4. Check the protocol you will be using, TCP and/or UDP.
5. Enter the IP address of the computer or network device that you want the port server to go to. For
example, if the web server’s Ethernet adapter IP address is 192.168.1.100, you would enter 100 in the
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field provided. Check “Appendix C: Finding the MAC Address and IP Address for Your Ethernet
Adapter” for details on getting an IP address.
6. Check the Enable option for the port services you want to use. Consider the example below:
Customized Application
Web server
FTP server
SMTP (outgoing)
POP3 (incoming)
External Port
80 to 80
21 to 21
25 to 25
110 to 110
TCP
X
X
X
X
UDP
IP Address
192.168.1.100
192.168.1.101
192.168.1.102
192.168.1.102
Enable
X
X
X
X
When you have completed the configuration, click the Save Settings button.
7. I need to set up online game hosting or use other Internet applications.
If you want to play online games or use Internet applications, most will work without doing any port
forwarding or DMZ hosting. There may be cases when you want to host an online game or Internet
application. This would require you to set up the Gateway to deliver incoming packets or data to a specific
computer. This also applies to the Internet applications you are using. The best way to get the information on
what port services to use is to go to the website of the online game or application you want to use. Follow
these steps to set up online game hosting or use a certain Internet application:
1. Access the Gateway’s web interface by going to http://192.168.1.1 or the IP address of the Gateway.
Go to the Applications and Gaming => Port Range Forwarding tab.
2. Enter any name you want to use for the Customized Application.
3. Enter the External Port range of the service you are using. For example, if you want to host Unreal
Tournament (UT), you would enter the range 7777 to 27900.
4. Check the protocol you will be using, TCP and/or UDP.
5. Enter the IP address of the computer or network device that you want the port server to go to. For
example, if the web server’s Ethernet adapter IP address is 192.168.1.100, you would enter 100 in the
field provided. Check “Appendix C: Finding the MAC Address and IP Address for Your Ethernet
Adapter” for details on getting an IP address.
6. Check the Enable option for the port services you want to use. Consider the example below:
Customized Application
UT
Halflife
PC Anywhere
VPN IPSEC
External Port
7777 to 27900
27015 to 27015
5631 to 5631
500 to 500
TCP
X
X
UDP
X
X
X
X
IP Address
192.168.1.100
192.168.1.105
192.168.1.102
192.168.1.100
Enable
X
X
X
X
When you have completed the configuration, click the Save Settings button.
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Common Problems and Solutions
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Wireless-G ADSL Gateway
8. I can’t get the Internet game, server, or application to work.
If you are having difficulties getting any Internet game, server, or application to function properly, consider
exposing one computer to the Internet using DeMilitarized Zone (DMZ) hosting. This option is available when
an application requires too many ports or when you are not sure which port services to use. Make sure you
disable all the forwarding entries if you want to successfully use DMZ hosting, since forwarding has priority
over DMZ hosting. (In other words, data that enters the Gateway will be checked first by the forwarding
settings. If the port number that the data enters from does not have port forwarding, then the Gateway will
send the data to whichever computer or network device you set for DMZ hosting.)
• Follow these steps to set DMZ hosting:
1. Access the Gateway’s web-based utility by going to http://192.168.1.1 or the IP address of the
Gateway. Go to the Applications and Gaming => DMZ tab. Click Enabled and enter the IP of the
computer.
2. Check the Port Forwarding pages and disable or remove the entries you have entered for forwarding.
Keep this information in case you want to use it at a later time.
• Once completed with the configuration, click the Save Settings button.
9. I forgot my password, or the password prompt always appears when I am saving settings to the
Gateway.
• Reset the Gateway to factory default by pressing the Reset button for 10 seconds and then releasing it. If
you are still getting prompted for a password when saving settings, then perform the following steps:
1. Access the Gateway’s web-based utility by going to http://192.168.1.1 or the IP address of the
Gateway. Enter the default username and password admin, and click the Administrations =>
Management tab.
2. Enter a different password in the Gateway Password field, and enter the same password in the
second field to confirm the password.
3. Click the Save Settings button.
10. I am a PPPoE user, and I need to remove the proxy settings or the dial-up pop-up window.
If you have proxy settings, you need to disable these on your computer. Because the Gateway is the gateway
for the Internet connection, the computer does not need any proxy settings to gain access. Please follow
these directions to verify that you do not have any proxy settings and that the browser you use is set to
connect directly to the LAN.
• For Microsoft Internet Explorer 5.0 or higher:
1. Click Start, Settings, and Control Panel. Double-click Internet Options.
2. Click the Connections tab.
3. Click the LAN settings button and remove anything that is checked.
4. Click the OK button to go back to the previous screen.
5. Click the option Never dial a connection. This will remove any dial-up pop-ups for PPPoE users.
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Wireless-G ADSL Gateway
• For Netscape 4.7 or higher:
1. Start Netscape Navigator, and click Edit, Preferences, Advanced, and Proxies.
2. Make sure you have Direct connection to the Internet selected on this screen.
3. Close all the windows to finish.
11. To start over, I need to set the Gateway to factory default.
Hold the Reset button for 10 seconds and then release it. This will return the Internet settings, password,
forwarding, and other settings on the Gateway to the factory default settings. In other words, the Gateway will
revert to its original factory configuration.
12. I need to upgrade the firmware.
In order to upgrade the firmware with the latest features, you need to go to the Linksys international website
and download the latest firmware at www.linksys.com/international.
• Follow these steps:
1. Go to the Linksys international website at http://www.linksys.com/international and select your
region or country.
2. Click the Products tab and select the Gateway.
3. On the Gateway’s webpage, click Firmware, and then download the latest firmware for the Gateway.
4. To upgrade the firmware, follow the steps in the Administration section found in “Chapter 5:
Configuring the Wireless-G ADSL Gateway.”
13. The firmware upgrade failed, and/or the Power LED is flashing.
The upgrade could have failed for a number of reasons. Follow these steps to upgrade the firmware and/or
make the Power LED stop flashing:
• If the firmware upgrade failed, use the TFTP program (it was downloaded along with the firmware). Open
the pdf that was downloaded along with the firmware and TFTP program, and follow the pdf’s
instructions.
• Set a static IP address on the computer; refer to “Problem #1, I need to set a static IP address.” Use the
following IP address settings for the computer you are using:
IP Address: 192.168.1.50
Subnet Mask: 255.255.255.0
Gateway: 192.168.1.1
• Perform the upgrade using the TFTP program or the Gateway’s web-based utility through its
Administration tab.
14. My DSL service’s PPPoE is always disconnecting.
PPPoE is not actually a dedicated or always-on connection. The DSL ISP can disconnect the service after a
period of inactivity, just like a normal phone dial-up connection to the Internet.
• There is a setup option to “keep alive” the connection. This may not always work, so you may need to reestablish connection periodically.
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1. To connect to the Gateway, go to the web browser, and enter http://192.168.1.1 or the IP address of
the Gateway.
2. Enter the username and password, if asked. (The default username and password is admin.)
3. On the Setup screen, select the option Keep Alive, and set the Redial Period option at 20 (seconds).
4. Click the Save Settings button. Click the Status tab, and click the Connect button.
5. You may see the login status display as Connecting. Press the F5 key to refresh the screen, until you
see the login status display as Connected.
6. Click the Save Settings button to continue.
• If the connection is lost again, follow steps 1- 6 to re-establish connection.
15. I can’t access my e-mail, web, or VPN, or I am getting corrupted data from the Internet.
The Maximum Transmission Unit (MTU) setting may need to be adjusted. By default, the MTU is set
automatically.
• If you are having some difficulties, perform the following steps:
1. To connect to the Gateway, go to the web browser, and enter http://192.168.1.1 or the IP address of
the Gateway.
2. Enter the username and password, if asked. (The default username and password is admin.)
3. Look for the MTU option, and select Manual. In the Size field, enter 1492.
4. Click the Save Settings button to continue.
• If your difficulties continue, change the Size to different values. Try this list of values, one value at a time,
in this order, until your problem is solved:
1462
1400
1362
1300
16. The Power LED flashes continuously.
The Power LED lights up when the device is first powered up. In the meantime, the system will boot up itself
and check for proper operation. After finishing the checking procedure, the LED remains steady to show that
the system is working fine. If the LED continues to flash after this time, the device is not working properly. Try
to flash the firmware by assigning a static IP address to the computer, and then upgrade the firmware. Try
using the following settings, IP Address: 192.168.1.50 and Subnet Mask: 255.255.255.0.
17. When I enter a URL or IP address, I get a time-out error or am prompted to retry.
• Check if other computers work. If they do, ensure that your computer’s IP settings are correct (IP Address,
Subnet Mask, Default Gateway, and DNS). Restart the computer that is having a problem.
• If the computers are configured correctly, but still not working, check the Gateway. Ensure that it is
connected and powered on. Connect to it and check its settings. (If you cannot connect to it, check the
LAN and power connections.)
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Wireless-G ADSL Gateway
• If the Gateway is configured correctly, check your Internet connection (DSL/cable modem, etc.) to see if it
is working correctly. You can remove the Gateway to verify a direct connection.
• Manually configure the TCP/IP settings with a DNS address provided by your ISP.
• Make sure that your browser is set to connect directly and that any dial-up is disabled. For Internet
Explorer, click Tools, Internet Options, and then the Connection tab. Make sure that Internet Explorer is
set to Never dial a connection. For Netscape Navigator, click Edit, Preferences, Advanced, and Proxy.
Make sure that Netscape Navigator is set to Direct connection to the Internet.
18. I’m trying to access the Gateway’s Web-based Utility, but I do not see the login screen. Instead, I see
a screen saying, “404 Forbidden.”
If you are using Windows Explorer, perform the following steps until you see the Web-based Utility’s login
screen (Netscape Navigator will require similar steps):
1. Click File. Make sure Work Offline is NOT checked.
2. Press CTRL + F5. This is a hard refresh, which will force Windows Explorer to load new webpages,
not cached ones.
• Click Tools. Click Internet Options. Click the Security tab. Click the Default level button. Make sure the
security level is Medium or lower. Then click the OK button.
Frequently Asked Questions
What is the maximum number of IP addresses that the Gateway will support?
The Gateway will support up to 253 IP addresses.
Is IPSec Passthrough supported by the Gateway?
Yes, it is a built-in feature that is enabled by default.
Where is the Gateway installed on the network?
In a typical environment, the Gateway is installed between the ADSL wall jack and the LAN.
Does the Gateway support IPX or AppleTalk?
No. TCP/IP is the only protocol standard for the Internet and has become the global standard for communications.
IPX, a NetWare communications protocol used only to route messages from one node to another, and AppleTalk,
a communications protocol used on Apple and Macintosh networks, can be used for LAN to LAN connections, but
those protocols cannot connect from the Internet to a LAN.
Does the LAN connection of the Gateway support 100Mbps Ethernet?
The Gateway supports 100Mbps over the auto-sensing Fast Ethernet 10/100 switch on the LAN side of the
Gateway.
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Frequently Asked Questions
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Wireless-G ADSL Gateway
What is Network Address Translation and what is it used for?
Network Address Translation (NAT) translates multiple IP addresses on the private LAN to one public address that
is sent out to the Internet. This adds a level of security since the address of a computer connected to the private
LAN is never transmitted on the Internet. Furthermore, NAT allows the Gateway to be used with low cost Internet
accounts when only one TCP/IP address is provided by the ISP. The user may have many private addresses
behind this single address provided by the ISP.
Does the Gateway support any operating system other than Windows 98SE, Windows Millennium,
Windows 2000, or Windows XP?
Yes, but Linksys does not, at this time, provide technical support for setup, configuration or troubleshooting of
any non-Windows operating systems.
Does the Gateway support ICQ send file?
Yes, with the following fix: click ICQ menu -> preference -> connections tab->, and check I am behind a firewall
or proxy. Then set the firewall time-out to 80 seconds in the firewall setting. The Internet user can then send a file
to a user behind the Gateway.
I set up an Unreal Tournament Server, but others on the LAN cannot join. What do I need to do?
If you have a dedicated Unreal Tournament server running, you need to create a static IP for each of the LAN
computers and forward ports 7777, 7778, 7779, 7780, 7781, and 27900 to the IP address of the server. You can
also use a port forwarding range of 7777 ~ 27900. If you want to use the UT Server Admin, forward another port.
(Port 8080 usually works well but is used for remote admin. You may have to disable this.) Then in the
[UWeb.WebServer] section of the server.ini file, set the ListenPort to 8080 (to match the mapped port above) and
ServerName to the IP assigned to the Gateway from your ISP.
Can multiple gamers on the LAN get on one game server and play simultaneously with just one public IP
address?
It depends on which network game or what kind of game server you are using. For example, Unreal Tournament
supports multi-login with one public IP.
How do I get Half-Life: Team Fortress to work with the Gateway?
The default client port for Half-Life is 27005. The computers on your LAN need to have “+clientport 2700x”
added to the HL shortcut command line; the x would be 6, 7, 8, and on up. This lets multiple computers connect
to the same server. One problem: Version 1.0.1.6 won’t let multiple computers with the same CD key connect at
the same time, even if on the same LAN (not a problem with 1.0.1.3). As far as hosting games, the HL server does
not need to be in the DMZ. Just forward port 27015 to the local IP address of the server computer.
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Frequently Asked Questions
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The web page hangs; downloads are corrupt, or nothing but junk characters are being displayed on the
screen. What do I need to do?
Force your Ethernet adapter to 10Mbps or half duplex mode, and turn off the “Auto-negotiate” feature of your
Ethernet adapter as a temporary measure. (Please look at the Network Control Panel in your Ethernet adapter’s
Advanced Properties tab.) Make sure that your proxy setting is disabled in the browser. Check our website at
www.linksys.com/international for more information.
If all else fails in the installation, what can I do?
Reset the Gateway by holding down the reset button until the Power LED fully turns on and off. Reset your DSL
modem by powering the unit off and then on. Obtain and flash the latest firmware release that is readily available
on the Linksys international website, www.linksys.com/international.
How will I be notified of new Gateway firmware upgrades?
All Linksys firmware upgrades are posted on the Linksys international website at www.linksys.com/international,
where they can be downloaded for free. To upgrade the Gateway’s firmware, use the Administration tab of the
Gateway’s web-based utility. If the Gateway’s Internet connection is working well, there is no need to download a
newer firmware version, unless that version contains new features that you would like to use.
Will the Gateway function in a Macintosh environment?
Yes, but the Gateway’s setup pages are accessible only through Internet Explorer 4.0 or Netscape Navigator 4.0
or higher for Macintosh.
I am not able to get the web configuration screen for the Gateway. What can I do?
You may have to remove the proxy settings on your Internet browser, e.g., Netscape Navigator or Internet
Explorer. Check with your browser documentation, and make sure that your browser is set to connect directly
and that any dial-up is disabled. For Internet Explorer, click Tools, Internet Options, and then the Connection tab.
Make sure that Internet Explorer is set to Never dial a connection. For Netscape Navigator, click Edit,
Preferences, Advanced, and Proxy. Make sure that Netscape Navigator is set to Direct connection to the Internet.
What is DMZ Hosting?
Demilitarized Zone (DMZ) allows one IP address (computer) to be exposed to the Internet. Some applications
require multiple TCP/IP ports to be open. It is recommended that you set your computer with a static IP if you
want to use DMZ Hosting. To get the LAN IP address, see “Appendix C: Finding the MAC Address and IP Address
for Your Ethernet Adapter.”
If DMZ Hosting is used, does the exposed user share the public IP with the Gateway?
No.
Does the Gateway pass PPTP packets or actively route PPTP sessions?
The Gateway allows PPTP packets to pass through.
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Wireless-G ADSL Gateway
Is the Gateway cross-platform compatible?
Any platform that supports Ethernet and TCP/IP is compatible with the Gateway.
How many ports can be simultaneously forwarded?
Theoretically, the Gateway can establish 520 sessions at the same time, but you can only forward 10 ranges of
ports.
What are the advanced features of the Gateway?
The Gateway’s advanced features include Advanced Wireless settings, Filters, Port Forwarding, Routing, and
DDNS.
What is the maximum number of VPN sessions allowed by the Gateway?
The maximum number depends on many factors. At least one IPSec session will work through the Gateway;
however, simultaneous IPSec sessions may be possible, depending on the specifics of your VPNs.
How can I check whether I have static or DHCP IP Addresses?
Consult your ISP to obtain this information.
How do I get mIRC to work with the Gateway?
Under the Port Forwarding tab, set port forwarding to 113 for the computer on which you are using mIRC.
Can the Gateway act as my DHCP server?
Yes. The Gateway has DHCP server software built-in.
Can I run an application from a remote computer over the wireless network?
This will depend on whether or not the application is designed to be used over a network. Consult the
application’s documentation to determine if it supports operation over a network.
What is the IEEE 802.11g standard?
It is one of the IEEE standards for wireless networks. The 802.11g standard allows wireless networking hardware
from different manufacturers to communicate, provided that the hardware complies with the 802.11g standard.
The 802.11g standard states a maximum data transfer rate of 54Mbps and an operating frequency of 2.4GHz.
Appendix A: Troubleshooting
Frequently Asked Questions
61
Wireless-G ADSL Gateway
What IEEE 802.11b and 802.11g features are supported?
The product supports the following IEEE 802.11b and IEEE 802.11g functions:
• CSMA/CA plus Acknowledge protocol
• Multi-Channel Roaming
• Automatic Rate Selection
• RTS/CTS feature
• Fragmentation
• Power Management
It also supports OFDM technology for 802.11g networking.
What is ad-hoc mode?
When a wireless network is set to ad-hoc mode, the wireless-equipped computers are configured to
communicate directly with each other, peer-to-peer without the use of an access point.
What is infrastructure mode?
When a wireless network is set to infrastructure mode, the wireless network is configured to communicate with
a network through a wireless access point.
What is roaming?
Roaming is the ability of a portable computer user to communicate continuously while moving freely throughout
an area greater than that covered by a single access point. Before using the roaming function, the computer must
make sure that it is the same channel number with the access point of dedicated coverage area.
To achieve true seamless connectivity, the wireless LAN must incorporate a number of different functions. Each
node and access point, for example, must always acknowledge receipt of each message. Each node must
maintain contact with the wireless network even when not actually transmitting data. Achieving these functions
simultaneously requires a dynamic RF networking technology that links access points and nodes. In such a
system, the user’s end node undertakes a search for the best possible access to the system. First, it evaluates
such factors as signal strength and quality, as well as the message load currently being carried by each access
point and the distance of each access point to the wired backbone. Based on that information, the node next
selects the right access point and registers its address. Communications between end node and host computer
can then be transmitted up and down the backbone.
As the user moves on, the end node’s RF transmitter regularly checks the system to determine whether it is in
touch with the original access point or whether it should seek a new one. When a node no longer receives
acknowledgment from its original access point, it undertakes a new search. Upon finding a new access point, it
then re-registers, and the communication process continues.
Appendix A: Troubleshooting
Frequently Asked Questions
62
Wireless-G ADSL Gateway
What is the ISM band?
The FCC and their counterparts outside of the U.S. have set aside bandwidth for unlicensed use in the ISM
(Industrial, Scientific and Medical) band. Spectrum in the vicinity of 2.4 GHz, in particular, is being made available
worldwide. This presents a truly revolutionary opportunity to place convenient high-speed wireless capabilities in
the hands of users around the globe.
What is Spread Spectrum?
Spread Spectrum technology is a wideband radio frequency technique developed by the military for use in
reliable, secure, mission-critical communications systems. It is designed to trade off bandwidth efficiency for
reliability, integrity, and security. In other words, more bandwidth is consumed than in the case of narrowband
transmission, but the trade-off produces a signal that is, in effect, louder and thus easier to detect, provided that
the receiver knows the parameters of the spread-spectrum signal being broadcast. If a receiver is not tuned to
the right frequency, a spread-spectrum signal looks like background noise. There are two main alternatives,
Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping Spread Spectrum (FHSS).
What is DSSS? What is FHSS? And what are their differences?
Frequency-Hopping Spread-Spectrum (FHSS) uses a narrowband carrier that changes frequency in a pattern that
is known to both transmitter and receiver. Properly synchronized, the net effect is to maintain a single logical
channel. To an unintended receiver, FHSS appears to be short-duration impulse noise. Direct-Sequence SpreadSpectrum (DSSS) generates a redundant bit pattern for each bit to be transmitted. This bit pattern is called a chip
(or chipping code). The longer the chip, the greater the probability that the original data can be recovered. Even if
one or more bits in the chip are damaged during transmission, statistical techniques embedded in the radio can
recover the original data without the need for retransmission. To an unintended receiver, DSSS appears as low
power wideband noise and is rejected (ignored) by most narrowband receivers.
Will the information be intercepted while it is being transmitted through the air?
WLAN features two-fold protection in security. On the hardware side, as with Direct Sequence Spread Spectrum
technology, it has the inherent security feature of scrambling. On the software side, WLAN offers the encryption
function (WEP) to enhance security and access control.
What is WEP?
WEP is Wired Equivalent Privacy, a data privacy mechanism based on a 64-bit or 128-bit shared key algorithm, as
described in the IEEE 802.11 standard.
What is a MAC Address?
The Media Access Control (MAC) address is a unique number assigned by the manufacturer to any Ethernet
networking device, such as a network adapter, that allows the network to identify it at the hardware level. For all
practical purposes, this number is usually permanent. Unlike IP addresses, which can change every time a
computer logs onto the network, the MAC address of a device stays the same, making it a valuable identifier for
the network.
Appendix A: Troubleshooting
Frequently Asked Questions
63
Wireless-G ADSL Gateway
How do I reset the Gateway?
Press the Reset button on the back panel for about ten seconds. This will reset the Gateway to its default settings.
How do I resolve issues with signal loss?
There is no way to know the exact range of your wireless network without testing. Every obstacle placed between
the Gateway and a wireless computer will create signal loss. Lead glass, metal, concrete floors, water and walls
will inhibit the signal and reduce range. Start with the Gateway and your wireless computer in the same room
and move it away in small increments to determine the maximum range in your environment.
You may also try using different channels, as this may eliminate interference affecting only one channel.
I have excellent signal strength, but I cannot see my network.
WEP is probably enabled on the Gateway, but not on your wireless adapter (or vice versa). Verify that the same
WEP keys and levels (64 or 128) are being used on all nodes of your wireless network.
How many channels/frequencies are available with the Gateway?
There are eleven available channels, ranging from 1 to 11, in North America. There may be additional channels
available in other regions, subject to the regulations of your region and/or country.
If your questions are not addressed here, refer to the Linksys international website,
www.linksys.com/international.
Appendix A: Troubleshooting
Frequently Asked Questions
64
Wireless-G ADSL Gateway
Appendix B: Wireless Security
Linksys wants to make wireless networking as safe and easy for you as possible. The current generation of
Linksys products provide several network security features, but they require specific action on your part for
implementation. So, keep the following in mind whenever you are setting up or using your wireless network.
Security Precautions
The following is a complete list of security precautions to take (at least steps 1 through 5 should be followed):
1. Change the default SSID.
2. Disable SSID Broadcast.
3. Change the default password for the Administrator account.
4. Enable MAC Address Filtering.
5. Change the SSID periodically.
6. Use the highest encryption algorithm possible. Use WPA if it is available. Please note that this may reduce
your network performance.
NOTE: Some of these security features are
available only through the network gateway,
router, or access point. Refer to the gateway,
router, or access point’s documentation for more
information.
7. Change the WEP encryption keys periodically.
For information on implementing these security features, refer to “Chapter 6: Configuring the Wireless-G ADSL
Gateway.”
Security Threats Facing Wireless Networks
Wireless networks are easy to find. Hackers know that in order to join a wireless network, wireless networking
products first listen for “beacon messages”. These messages can be easily decrypted and contain much of the
network’s information, such as the network’s SSID (Service Set Identifier). Here are the steps you can take:
Change the administrator’s password regularly. With every wireless networking device you use, keep in
mind that network settings (SSID, WEP keys, etc.) are stored in its firmware. Your network administrator is the
only person who can change network settings. If a hacker gets a hold of the administrator’s password, he, too,
can change those settings. So, make it harder for a hacker to get that information. Change the administrator’s
password regularly.
Appendix B: Wireless Security
Security Precautions
65
Wireless-G ADSL Gateway
SSID. There are several things to keep in mind about the SSID:
1. Disable Broadcast
2. Make it unique
3. Change it often
Most wireless networking devices will give you the option of broadcasting the SSID. While this option may be
more convenient, it allows anyone to log into your wireless network. This includes hackers. So, don’t broadcast
the SSID.
Wireless networking products come with a default SSID set by the factory. (The Linksys default SSID is “linksys”.)
Hackers know these defaults and can check these against your network. Change your SSID to something unique
and not something related to your company or the networking products you use.
Change your SSID regularly so that any hackers who have gained access to your wireless network will have to
start from the beginning in trying to break in.
MAC Addresses. Enable MAC Address filtering. MAC Address filtering will allow you to provide access to only
those wireless nodes with certain MAC Addresses. This makes it harder for a hacker to access your network with
a random MAC Address.
WEP Encryption. Wired Equivalent Privacy (WEP) is often looked upon as a cure-all for wireless security
concerns. This is overstating WEP’s ability. Again, this can only provide enough security to make a hacker’s job
more difficult.
There are several ways that WEP can be maximized:
1. Use the highest level of encryption possible
2. Use “Shared Key” authentication
3. Change your WEP key regularly
IMPORTANT: Always remember that each
device in your wireless network MUST use
the same encryption method and encryption
key or your wireless network will not function
properly.
WPA. Wi-Fi Protected Access (WPA) is the newest and best available standard in Wi-Fi security. Two modes are
available: Pre-Shared Key and RADIUS. Pre-Shared Key gives you a choice of two encryption methods: TKIP
(Temporal Key Integrity Protocol), which utilizes a stronger encryption method and incorporates Message
Integrity Code (MIC) to provide protection against hackers, and AES (Advanced Encryption System), which utilizes
a symmetric 128-Bit block data encryption. RADIUS (Remote Authentication Dial-In User Service) utilizes a
RADIUS server for authentication and the use of dynamic TKIP, AES, or WEP.
Appendix B: Wireless Security
Security Threats Facing Wireless Networks
66
Wireless-G ADSL Gateway
WPA Pre-Shared Key. If you do not have a RADIUS server, Select the type of algorithm, TKIP or AES, enter a
password in the Pre-Shared key field of 8-64 characters, and enter a Group Key Renewal period time
between 0 and 99,999 seconds, which instructs the Gateway or other device how often it should change the
encryption keys.
WPA RADIUS. WPA used in coordination with a RADIUS server. (This should only be used when a RADIUS
server is connected to the Gateway or other device.) First, select the type of WPA algorithm, TKIP or AES.
Enter the RADIUS server’s IP Address and port number, along with a key shared between the device and the
server. Last, enter a Group Key Renewal period, which instructs the device how often it should change the
encryption keys.
RADIUS. WEP used in coordination with a RADIUS server. (This should only be used when a RADIUS server is
connected to the Gateway or other device.) First, enter the RADIUS server’s IP Address and port number, along
with a key shared between the device and the server. Then, select a WEP key and a level of WEP encryption,
and either generate a WEP key through the Passphrase or enter the WEP key manually.
Implementing encryption may have a negative impact on your network’s performance, but if you are transmitting
sensitive data over your network, encryption should be used.
These security recommendations should help keep your mind at ease while you are enjoying the most flexible
and convenient technology Linksys has to offer.
Appendix B: Wireless Security
Security Threats Facing Wireless Networks
67
Wireless-G ADSL Gateway
Appendix C: Finding the MAC Address and IP Address for
Your Ethernet Adapter
This section describes how to find the MAC address for your computer’s Ethernet adapter so you can use the MAC
filtering feature of the Gateway. You can also find the IP address of your computer’s Ethernet adapter. This IP
address is used for the Gateway’s filtering, forwarding, and/or DMZ features. Follow the steps in this appendix to
find the adapter’s MAC or IP address in Windows 98, Me, 2000, or XP.
Windows 98 or Me Instructions
1. Click Start and Run. In the Open field, enter winipcfg. Then press the Enter key or the OK button.
2. When the IP Configuration screen appears, select the Ethernet adapter you have connected to the Gateway
via a CAT 5 Ethernet network cable. See Figure C-1.
Figure C-1: IP Configuration Screen
3. Write down the Adapter Address as shown on your computer screen (see Figure C-2). This is the MAC address
for your Ethernet adapter and is shown in hexadecimal as a series of numbers and letters.
The MAC address/Adapter Address is what you will use for MAC filtering. The example in Figure D-2 shows
the Ethernet adapters’s MAC address as 00-00-00-00-00-00. Your computer will show something different.
The example in Figure C-2 shows the Ethernet adapter’s IP address as 192.168.1.100. Your computer may
show something different.
Note: The MAC address is also called the Adapter Address.
Figure C-2: MAC Address/Adapter
Address
Appendix C: Finding the MAC Address and IP Address for Your Ethernet Adapter
Windows 98 or Me Instructions
68
Wireless-G ADSL Gateway
Windows 2000 or XP Instructions
1. Click Start and Run. In the Open field, enter cmd. Press the Enter key or click the OK button.
Note: The MAC address is also called the Physical Address.
2. At the command prompt, enter ipconfig /all. Then press the Enter key.
3. Write down the Physical Address as shown on your computer screen (Figure C-3); it is the MAC address for
your Ethernet adapter. This appears as a series of numbers and letters.
The MAC address/Physical Address is what you will use for MAC filtering. The example in Figure C-3 shows
the Ethernet adapters’s MAC address as 00-00-00-00-00-00. Your computer will show something different.
Figure C-3: MAC Address/Physical Address
The example in Figure C-3 shows the Ethernet adapter’s IP address as 192.168.1.100. Your computer may
show something different.
Appendix C: Finding the MAC Address and IP Address for Your Ethernet Adapter
Windows 2000 or XP Instructions
69
Wireless-G ADSL Gateway
Appendix D: Upgrading Firmware
To upgrade the Gateway’s firmware:
1. Download the Gateway’s firmware upgrade file from www.linksys.com.
2. Extract the file on your computer.
3. Open the Gateway’s Web-based Utility and click the Administration tab.
4. Click the Firmware Upgrade tab.
5. Click the Browse button to find the extracted file, and then double-click it.
6. Click the Upgrade button, and follow the on-screen instructions.
Figure D-1: Firmware Upgrade
Appendix D: Upgrading Firmware
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Wireless-G ADSL Gateway
Appendix E: Glossary
This glossary contains some basic networking terms you may come across when using this product. For more
advanced terms, see the complete Linksys glossary at http://www.linksys.com/glossary.
Access Point - A device that allows wireless-equipped computers and other devices to communicate with a
wired network. Also used to expand the range of a wireless network.
Ad-hoc - A group of wireless devices communicating directly with each other (peer-to-peer) without the use of
an access point.
AES (Advanced Encryption Standard) - A security method that uses symmetric 128-bit block data encryption.
Bandwidth - The transmission capacity of a given device or network.
Bit - A binary digit.
Boot - To start a device and cause it to start executing instructions.
Broadband - An always-on, fast Internet connection.
Browser - An application program that provides a way to look at and interact with all the information on the
World Wide Web.
Byte - A unit of data that is usually eight bits long
Cable Modem - A device that connects a computer to the cable television network, which in turn connects to the
Internet.
Daisy Chain - A method used to connect devices in a series, one after the other.
DDNS (Dynamic Domain Name System) - Allows the hosting of a website, FTP server, or e-mail server with a
fixed domain name (e.g., www.xyz.com) and a dynamic IP address.
Default Gateway - A device that forwards Internet traffic from your local area network.
DHCP (Dynamic Host Configuration Protocol) - A networking protocol that allows administrators to assign
temporary IP addresses to network computers by "leasing" an IP address to a user for a limited amount of time,
instead of assigning permanent IP addresses.
Appendix E: Glossary
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Wireless-G ADSL Gateway
DMZ (Demilitarized Zone) - Removes the Router's firewall protection from one PC, allowing it to be "seen" from
the Internet.
DNS (Domain Name Server) - The IP address of your ISP's server, which translates the names of websites into IP
addresses.
Domain - A specific name for a network of computers.
Download - To receive a file transmitted over a network.
DSL (Digital Subscriber Line) - An always-on broadband connection over traditional phone lines.
Dynamic IP Address - A temporary IP address assigned by a DHCP server.
EAP (Extensible Authentication Protocol) - A general authentication protocol used to control network access.
Many specific authentication methods work within this framework.
Encryption - Encoding data transmitted in a network.
Ethernet - IEEE standard network protocol that specifies how data is placed on and retrieved from a common
transmission medium.
Firewall - A set of related programs located at a network gateway server that protects the resources of a
network from users from other networks.
Firmware - The programming code that runs a networking device.
FTP (File Transfer Protocol) - A protocol used to transfer files over a TCP/IP network.
Full Duplex - The ability of a networking device to receive and transmit data simultaneously.
Gateway - A device that interconnects networks with different, incompatible communications protocols.
Half Duplex - Data transmission that can occur in two directions over a single line, but only one direction at a
time.
HTTP (HyperText Transport Protocol) - The communications protocol used to connect to servers on the World
Wide Web.
Infrastructure - A wireless network that is bridged to a wired network via an access point.
IP (Internet Protocol) - A protocol used to send data over a network.
Appendix E: Glossary
72
Wireless-G ADSL Gateway
IP Address - The address used to identify a computer or device on a network.
IPCONFIG - A Windows 2000 and XP utility that displays the IP address for a particular networking device.
IPSec (Internet Protocol Security) - A VPN protocol used to implement secure exchange of packets at the IP layer.
ISP (Internet Service Provider) - A company that provides access to the Internet.
LAN - The computers and networking products that make up your local network.
MAC (Media Access Control) Address - The unique address that a manufacturer assigns to each networking
device.
Mbps (MegaBits Per Second) - One million bits per second; a unit of measurement for data transmission.
NAT (Network Address Translation) - NAT technology translates IP addresses of a local area network to a different
IP address for the Internet.
Network - A series of computers or devices connected for the purpose of data sharing, storage, and/or
transmission between users.
Packet - A unit of data sent over a network.
Passphrase - Used much like a password, a passphrase simplifies the WEP encryption process by automatically
generating the WEP encryption keys for Linksys products.
Ping (Packet INternet Groper) - An Internet utility used to determine whether a particular IP address is online.
POP3 (Post Office Protocol 3) - A standard mail server commonly used on the Internet.
Port - The connection point on a computer or networking device used for plugging in cables or adapters.
Power over Ethernet (PoE) - A technology enabling an Ethernet network cable to deliver both data and power.
PPPoE (Point to Point Protocol over Ethernet) - A type of broadband connection that provides authentication
(username and password) in addition to data transport.
PPTP (Point-to-Point Tunneling Protocol) - A VPN protocol that allows the Point to Point Protocol (PPP) to be
tunneled through an IP network. This protocol is also used as a type of broadband connection in Europe.
RADIUS (Remote Authentication Dial-In User Service) - A protocol that uses an authentication server to control
network access.
Appendix E: Glossary
73
Wireless-G ADSL Gateway
RJ-45 (Registered Jack-45) - An Ethernet connector that holds up to eight wires.
Roaming - The ability to take a wireless device from one access point's range to another without losing the
connection.
Router - A networking device that connects multiple networks together.
Server - Any computer whose function in a network is to provide user access to files, printing, communications,
and other services.
SMTP (Simple Mail Transfer Protocol) - The standard e-mail protocol on the Internet.
SNMP (Simple Network Management Protocol) - A widely used network monitoring and control protocol.
SPI (Stateful Packet Inspection) Firewall - A technology that inspects incoming packets of information before
allowing them to enter the network.
SSID (Service Set IDentifier) - Your wireless network's name.
Static IP Address - A fixed address assigned to a computer or device that is connected to a network.
Static Routing - Forwarding data in a network via a fixed path.
Subnet Mask - An address code that determines the size of the network.
Switch - 1. A data switch that connects computing devices to host computers, allowing a large number of
devices to share a limited number of ports. 2. A device for making, breaking, or changing the connections in an
electrical circuit.
TCP (Transmission Control Protocol) - A network protocol for transmitting data that requires acknowledgement
from the recipient of data sent.
TCP/IP (Transmission Control Protocol/Internet Protocol) - A set of instructions PCs use to communicate over a
network.
Telnet - A user command and TCP/IP protocol used for accessing remote PCs.
TFTP (Trivial File Transfer Protocol) - A version of the TCP/IP FTP protocol that has no directory or password
capability.
Throughput - The amount of data moved successfully from one node to another in a given time period.
Appendix E: Glossary
74
Wireless-G ADSL Gateway
TKIP (Temporal Key Integrity Protocol) - a wireless encryption protocol that provides dynamic encryption keys for
each packet transmitted.
Topology - The physical layout of a network.
TX Rate - Transmission Rate.
Upgrade - To replace existing software or firmware with a newer version.
Upload - To transmit a file over a network.
URL (Uniform Resource Locator) - The address of a file located on the Internet.
VPN (Virtual Private Network) - A security measure to protect data as it leaves one network and goes to another
over the Internet.
WAN (Wide Area Network)- The Internet.
WEP (Wired Equivalent Privacy) - A method of encrypting network data transmitted on a wireless network for
greater security.
WLAN (Wireless Local Area Network) - A group of computers and associated devices that communicate with
each other wirelessly.
WPA (Wi-Fi Protected Access) - A wireless security protocol using TKIP (Temporal Key Integrity Protocol)
encryption, which can be used in conjunction with a RADIUS server.
Appendix E: Glossary
75
Wireless-G ADSL Gateway
Appendix F: Specifications
Model Number
WAG54G
Standards
IEEE 802.11g, 802.11b, 802.3u, 802.1p, 802.1Q; ITU G.992.1 (G.dmt),
G.992.2 (G.lite), G.992.3, G.992.5; ANSI T1.413 Issue 2
Ports
Antenna, Power, ADSL, Ethernet (1-4)
Buttons
One power button and one reset button
Cabling Type
Category 5 UTP/STP, POTS phone cabling
LEDs
Power, Wireless, Ethernet (1-4), DSL, Internet
Transmit Power
18 dBm
UPnP able/cert
Able
Security Features
Password protected configuration for web access
PAP and CHAP authentication
Denial of Service (DoS) prevention
URL and keyword filtering; Java, ActiveX, proxy, and cookie blocking
ToD (Time of Day) filter
VPN passthrough for IPSec, PPTP, PPPoE, and L2TP protocols
IPSec VPN tunnel endpoint capability
WPA PSK, WPA RADIUS, 128- and 64-bit WEP
SSID Broadcast Disable
Access restriction by MAC and IP addresses
WEP Key Bits
64, 128
Dimensions
140 mm x 140 mm x 27 mm
(5.51" x 5.51" x 1.06")
Appendix F: Specifications
76
Wireless-G ADSL Gateway
Unit Weight
0.3 kg (0.6 lb.)
Power
12VDC 1A
Certifications
CE
Operating Temp.
0º~40ºC (32º~104ºF)
Storage Temp.
-20º~70ºC (-4º~158ºF)
Operating Humidity
10~85% Non-Condensing
Storage Humidity
5~90% Non-Condensing
Appendix F: Specifications
77
Wireless-G ADSL Gateway
Appendix G: Regulatory Information
FCC Statement
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device
may not cause harmful interference, and (2) this device must accept any interference received, including interference that
may cause undesired operation.
This product has been tested and complies with the specifications for a Class B digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used
according to the instructions, may cause harmful interference to radio communications. However, there is no guarantee
that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which is found by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna
• Increase the separation between the equipment or devices
• Connect the equipment to an outlet other than the receiver's
• Consult a dealer or an experienced radio/TV technician for assistance
FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the
user’s authority to operate this equipment.
FCC Radiation Exposure Statement
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment
should be installed and operated with minimum distance 20cm between the radiator and your body.
This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. IEEE 802.11b or
802.11g operation of this product in the USA is firmware-limited to channels 1 through 11.
Safety Notices
Caution: To reduce the risk of fire, use only No.26 AWG or larger telecommunication line cord.
Do not use this product near water, for example, in a wet basement or near a swimming pool.
Avoid using this product during an electrical storm. There may be a remote risk of electric shock from lightning.
Appendix G: Regulatory Information
78
Dual-Band Wireless Access Point
FCC Part 68 Statement
This equipment complies with Part 68 of the FCC Rules. A label is attached to the equipment that contains, among other
information, its FCC registration number and ringer equivalence number. If requested, this information must be provided to
the telephone company.
This equipment uses the following USOC Jack: RJ-11.
An FCC compliant telephone cord and modular plug is provided with this equipment. This equipment is designed to be
connected to the telephone network or premises wiring using a compatible modular jack, which is FCC Part 68 compliant.
Connection to the telephone network should be made by using the standard modular telephone jack.
The REN is useful to determine the quantity of devices that may be connected to the telephone line and still have all of
those devices ring when your telephone number is called. In most, but not all areas, the sum of RENs should not exceed 5.
To be certain of the number of devices that may be connected to the line, as determined by the total RENs, contact the
telephone company to determine the maximum REN for the calling area.
If this equipment causes harm to the telephone network, the telephone company may discontinue your service temporarily.
If advance notice is not practical, the telephone company will notify the customer as soon as possible. Also, you will be
advised of your right to file a complaint with the FCC if you believe it is necessary.
The telephone company may make changes in its facilities, equipment, operations, or procedures that could affect the
operation of the equipment. If this happens, the telephone company will provide advance notice in order for you to make
the necessary modifications in order to maintain uninterrupted service.
In the event this equipment should fail to operate properly, disconnect the unit from the telephone line. Try using another
FCC approved device in the same telephone jack. If the trouble persists, call the telephone company repair service bureau.
If the trouble does not persist and appears to be with this unit, disconnect the unit from the telephone line and discontinue
use of the unit until it is repaired. Please note that the telephone company may ask that you disconnect the equipment
from the telephone network until the problem has been corrected or until you are sure that the equipment is not
malfunctioning. The user must use the accessories and cables supplied by the manufacturer to get optimum performance
from the product.
No repairs may be done by the customer. If trouble is experienced with this equipment, please contact your authorized
support provider for repair and warranty information. If the trouble is causing harm to the telephone network, the
telephone company may request you remove the equipment from the network until the problem is resolved. This
equipment cannot be used on telephone company provided coin service. Connection to Party Line Service is subject to
state tariffs.
Industry Canada Statement
This device complies with Industry Canada ICES-003 and RSS210 rules.
Appendix G: Regulatory Information
79
Dual-Band Wireless Access Point
Déclaration d’Industrie Candada
Cet appareil est conforme aux normes NMB003 et RSS210 d'Industrie Canada.
Industry Canada Statement
Operation is subject to the following two conditions:
1. This device may not cause interference and
2. This device must accept any interference, including interference that may cause undesired operation of the device.
This device has been designed to operate with an antenna having a maximum gain of 2dBi. Antenna having a higher
gain is strictly prohibited per regulations of Industry Canada. The required antenna impedance is 50 ohms.
To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the EIRP is
not more than required for successful communication.
3. Industry Canada Radiation Exposure Statement:
This equipment complies with IC radiation exposure limits set forth for an uncontrolled environment. This equipment
should be installed and operated with minimum distance 20cm between the radiator & your body.
This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
Avis d'Industrie Canada
L'utilisation de ce dispositif est autorisée seulement aux conditions suivantes :
1. il ne doit pas produire de brouillage et
2. il doit accepter tout brouillage radioélectrique reçu, même si ce brouillage est susceptible de compromettre le
fonctionnement du dispositif. Le dispositif a été conçu pour fonctionner avec une antenne ayant un gain maximum de 2
dBi. Les règlements d'Industrie Canada interdisent strictement l'utilisation d'antennes dont le gain est supérieur à
cette limite. L'impédance requise de l'antenne est de 50 ohms.
Afin de réduire le risque d'interférence aux autres utilisateurs, le type d'antenne et son gain doivent être choisis de
façon à ce que la puissance isotrope rayonnée équivalente (p.i.r.e.) ne soit pas supérieure au niveau requis pour obtenir
une communication satisfaisante.
3. Avis d'Industrie Canada concernant l'exposition aux radiofréquences :
Ce matériel est conforme aux limites établies par IC en matière d'exposition aux radiofréquences dans un
environnement non contrôlé. Ce matériel doit être installé et utilisé à une distance d'au moins 20 cm entre l'antenne et
le corps de l'utilisateur.
L'émetteur ne doit pas être placé près d'une autre antenne ou d'un autre émetteur, ou fonctionner avec une autre
antenne ou un autre émetteur.
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Compliance Information for 2.4-GHz Wireless Products
Relevant to the EU and Other Countries Following the EU
Directive 1999/5/EC (R&TTE Directive)
Declaration of Conformity with Regard to the EU Directive
1999/5/EC (R&TTE Directive)
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NOTE: For all products, the Declaration of Conformity is available through one or more of these options:
• A pdf file is included on the product's CD.
• A print copy is included with the product.
• A pdf file is available on the product's webpage. Visit www.linksys.com/international and select your country or
region. Then select your product.
If you need any other technical documentation, see the “Technical Documents on www.linksys.com/international”
section, as shown later in this appendix.
The following standards were applied during the assessment of the product against the requirements of the Directive
1999/5/EC:
•
•
•
Radio: EN 300 328
EMC: EN 301 489-1, EN 301 489-17
Safety: EN 60950 and either EN 50385 or EN 50371
CE Marking
For the Linksys Wireless-B and Wireless-G products, the following CE mark, notified body number (where applicable), and
class 2 identifier are added to the equipment.
or
or
Check the CE label on the product to find out which notified body was involved during the assessment.
National Restrictions
This product may be used in all EU countries (and other countries following the EU directive 1999/5/EC) without any
limitation except for the countries mentioned below:
Ce produit peut être utilisé dans tous les pays de l’UE (et dans tous les pays ayant transposés la directive 1999/5/CE) sans
aucune limitation, excepté pour les pays mentionnés ci-dessous:
Questo prodotto è utilizzabile in tutte i paesi EU (ed in tutti gli altri paesi che seguono le direttive EU 1999/5/EC) senza
nessuna limitazione, eccetto per i paesii menzionati di seguito:
Das Produkt kann in allen EU Staaten ohne Einschränkungen eingesetzt werden (sowie in anderen Staaten die der EU
Direktive 1999/5/CE folgen) mit Außnahme der folgenden aufgeführten Staaten:
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Belgium
The Belgian Institute for Postal Services and Telecommunications (BIPT) must be notified of any outdoor wireless link
having a range exceeding 300 meters. Please check http://www.bipt.be for more details.
Draadloze verbindingen voor buitengebruik en met een reikwijdte van meer dan 300 meter dienen aangemeld te worden
bij het Belgisch Instituut voor postdiensten en telecommunicatie (BIPT). Zie http://www.bipt.be voor meer gegevens.
Les liaisons sans fil pour une utilisation en extérieur d’une distance supérieure à 300 mètres doivent être notifiées à
l’Institut Belge des services Postaux et des Télécommunications (IBPT). Visitez
http://www.ibpt.be pour de plus amples détails.
France
In case the product is used outdoors, the output power is restricted in some parts of the band. See Table 1 or check
http://www.arcep.fr/ for more details.
Dans la cas d’une utilisation en extérieur, la puissance de sortie est limitée pour certaines parties de la bande. Reportezvous à la table 1 ou visitez http://www.arcep.fr/ pour de plus amples détails.
Table 1: Applicable Power Levels in France
Location
Frequency Range (MHz)
Power (EIRP)
Indoor (No restrictions)
2400-2483.5
100 mW (20 dBm)
Outdoor
2400-2454
2454-2483.5
100 mW (20 dBm)
10 mW (10 dBm)
Italy
This product meets the National Radio Interface and the requirements specified in the National Frequency Allocation Table
for Italy. Unless operating within the boundaries of the owner’s property, the use of this 2.4 GHz Wireless LAN product
requires a ‘general authorization’. Please check with http://www.comunicazioni.it/it/ for more details.
Questo prodotto è conforme alla specifiche di Interfaccia Radio Nazionali e rispetta il Piano Nazionale di ripartizione delle
frequenze in Italia. Se non viene installato all’interno del proprio fondo, l’utilizzo di prodotti Wireless LAN a 2.4 GHz richiede
una “Autorizzazione Generale”. Consultare http://www.comunicazioni.it/it/ per maggiori dettagli.
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Product Usage Restrictions
This product is designed for indoor usage only. Outdoor usage is not recommended.
This product is designed for use with the standard, integral or dedicated (external) antenna(s) that is/are shipped together
with the equipment. However, some applications may require the antenna(s), if removable, to be separated from the
product and installed remotely from the device by using extension cables. For these applications, Linksys offers an R-SMA
extension cable (AC9SMA) and an R-TNC extension cable (AC9TNC). Both of these cables are 9 meters long and have a
cable loss (attenuation) of 5 dB. To compensate for the attenuation, Linksys also offers higher gain antennas, the HGA7S
(with R-SMA connector) and HGA7T (with R-TNC connector). These antennas have a gain of 7 dBi and may only be used
with either the R-SMA or R-TNC extension cable.
Combinations of extension cables and antennas resulting in a radiated power level exceeding 100 mW EIRP are illegal.
Power Output of Your Device
To comply with your country’s regulations, you may have to change the power output of your wireless device. Proceed to
the appropriate section for your device.
NOTE: The power output setting may not be available on all wireless products. For more information, refer to
the documentation on your product’s CD or http://www.linksys.com/international.
Wireless Adapters
Wireless adapters have the power output set to 100% by default. Maximum power output on each adapter does not exceed
20 dBm (100 mW); it is generally 18 dBm (64 mW) or below. If you need to alter your wireless adapter’s power output,
follow the appropriate instructions for your computer’s Windows operating system:
Windows XP
4. Double-click the Wireless icon in your desktop’s system tray.
5. Open the Wireless Network Connection window.
6. Click the Properties button.
7. Select the General tab, and click the Configure button.
8. In the Properties window, click the Advanced tab.
9. Select Power Output.
10. From the pull-down menu on the right, select the wireless adapter’s power output percentage.
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Windows 2000
1. Open the Control Panel.
2. Double-click Network and Dial-Up Connections.
3. Select your current wireless connection, and select Properties.
4. From the Properties screen, click the Configure button.
5. Click the Advanced tab, and select Power Output.
6. From the pull-down menu on the right, select the wireless adapter’s power setting.
If your computer is running Windows Millennium or 98, then refer to Windows Help for instructions on how to access the
advanced settings of a network adapter.
Wireless Access Points, Routers, or Other Wireless Products
If you have a wireless access point, router or other wireless product, use its Web-based Utility to configure its power
output setting (refer to the product’s documentation for more information).
Technical Documents on www.linksys.com/international
Follow these steps to access technical documents:
1. Enter http://www.linksys.com/international in your web browser.
2. Select the country or region in which you live.
3. Click the Products tab.
4. Select the appropriate product category.
5. Select the product sub-category, if necessary.
6. Select the product.
7. Select the type of documentation you want from the More Information section. The document will open in PDF format if
you have Adobe Acrobat installed on your computer.
NOTE: If you have questions regarding the compliance of these products or you cannot find the information
you need, please contact your local sales office or visit http://www.linksys.com/international for more details.
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Wireless-G ADSL Gateway
User Information for Consumer Products Covered by EU Directive 2002/96/EC on Waste Electric and Electronic
Equipment (WEEE)
This document contains important information for users with regards to the proper disposal and recycling of Linksys
products. Consumers are required to comply with this notice for all electronic products bearing the following symbol:
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For more information, visit www.linksys.com.
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Appendix H: Warranty Information
Linksys warrants to You that, for a period of three years (the “Warranty Period”), your Linksys Product will be substantially
free of defects in materials and workmanship under normal use. Your exclusive remedy and Linksys' entire liability under
this warranty will be for Linksys at its option to repair or replace the Product or refund Your purchase price less any rebates.
This limited warranty extends only to the original purchaser.
If the Product proves defective during the Warranty Period call Linksys Technical Support in order to obtain a Return
Authorization Number, if applicable. BE SURE TO HAVE YOUR PROOF OF PURCHASE ON HAND WHEN CALLING. If You are
requested to return the Product, mark the Return Authorization Number clearly on the outside of the package and include a
copy of your original proof of purchase. RETURN REQUESTS CANNOT BE PROCESSED WITHOUT PROOF OF PURCHASE. You
are responsible for shipping defective Products to Linksys. Linksys pays for UPS Ground shipping from Linksys back to You
only. Customers located outside of the United States of America and Canada are responsible for all shipping and handling
charges.
ALL IMPLIED WARRANTIES AND CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED
TO THE DURATION OF THE WARRANTY PERIOD. ALL OTHER EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF NON-INFRINGEMENT, ARE DISCLAIMED. Some jurisdictions do not
allow limitations on how long an implied warranty lasts, so the above limitation may not apply to You. This warranty gives
You specific legal rights, and You may also have other rights which vary by jurisdiction.
This warranty does not apply if the Product (a) has been altered, except by Linksys, (b) has not been installed, operated,
repaired, or maintained in accordance with instructions supplied by Linksys, or (c) has been subjected to abnormal physical
or electrical stress, misuse, negligence, or accident. In addition, due to the continual development of new techniques for
intruding upon and attacking networks, Linksys does not warrant that the Product will be free of vulnerability to intrusion or
attack.
TO THE EXTENT NOT PROHIBITED BY LAW, IN NO EVENT WILL LINKSYS BE LIABLE FOR ANY LOST DATA, REVENUE OR PROFIT,
OR FOR SPECIAL, INDIRECT, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, REGARDLESS OF THE THEORY OF
LIABILITY (INCLUDING NEGLIGENCE), ARISING OUT OF OR RELATED TO THE USE OF OR INABILITY TO USE THE PRODUCT
(INCLUDING ANY SOFTWARE), EVEN IF LINKSYS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN NO EVENT
WILL LINKSYS’ LIABILITY EXCEED THE AMOUNT PAID BY YOU FOR THE PRODUCT. The foregoing limitations will apply even if
any warranty or remedy provided under this Agreement fails of its essential purpose. Some jurisdictions do not allow the
exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to You.
This Warranty is valid and may be processed only in the country of purchase.
Please direct all inquiries to: Linksys, P.O. Box 18558, Irvine, CA 92623.
91
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Appendix I: Contact Information
Need to contact Linksys?
Visit us online for information on the latest products and updates to your existing products at:
http://www.linksys.com/international
If you experience problems with any Linksys product, you can e-mail us at:
In Europe
E-mail Address
Austria
support.at@linksys.com
Belgium
support.be@linksys.com
Czech Republic
support.cz@linksys.com
Denmark
support.dk@linksys.com
Finland
support.fi@linksys.com
France
support.fr@linksys.com
Germany
support.de@linksys.com
Greece
support.gr@linksys.com (English only)
Hungary
support.hu@linksys.com
Ireland
support.ie@linksys.com
Italy
support.it@linksys.com
Netherlands
support.nl@linksys.com
Norway
support.no@linksys.com
Poland
support.pl@linksys.com
Portugal
support.pt@linksys.com
Russia
support.ru@linksys.com
Spain
support.es@linksys.com
Sweden
support.se@linksys.com
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92
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In Europe
E-mail Address
Switzerland
support.ch@linksys.com
United Kingdom
support.uk@linksys.com
Outside of Europe
E-mail Address
Asia Pacific
asiasupport@linksys.com (English only)
Latin America
support.portuguese@linksys.com or support.spanish@linksys.com
Middle East & Africa
support.mea@linksys.com (English only)
South Africa
support.ze@linksys.com (English only)
UAE
support.ae@linksys.com (English only)
U.S. and Canada
support@linksys.com
Note: For some countries, support may be available only in English.
Appendix I: Contact Information
93
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