Linksys WAG54G User Manual
A Division of Cisco Systems, Inc.
®
Model No.
GHz
2.4
WIRELESS
WAG54G
802.11g
Wireless-G
ADSL Gateway
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 © 2003 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”.
WAG54G-UG-31009NC BW
Wireless-G ADSL Gateway
Table of Contents
Chapter 1: Introduction 1
Welcome 1
What’s in this Guide? 2
Chapter 2: Planning your Network 4
The Gateway’s Functions 4
IP Addresses 4
Why do I need a VPN? 5
What is a VPN? 6
Chapter 3: Getting to Know the Wireless-G ADSL Gateway 8
The Back Panel 8
The Front Panel 9
Chapter 4: Connecting the Wireless-G Broadband Gateway 10
Overview 10
Wired Connection to a Computer 11
Wireless Connection to a Computer 11
Chapter 5: Configuring the Gateway 13
Overview 13
How to Access the Web-based Utility 15
The Setup Tab 15
The Wireless Tab 23
The Security Tab 26
The Access Restrictions Tab 31
The Applications and Gaming Tab 33
The Administration Tab 36
The Status Tab 41
Appendix A: Troubleshooting 45
Common Problems and Solutions 45
Frequently Asked Questions 53
Appendix B: Wireless Security 59
Appendix C: Configuring IPSec between a
Windows 2000 or XP Computer and the Gateway 62
Introduction 62
Wireless-G ADSL Gateway
Environment 62
How to Establish a Secure IPSec Tunnel 63
Appendix D: Finding the MAC Address and IP Address for Your Ethernet Adapter 73
Windows 98 or Me Instructions 73
Windows 2000 or XP Instructions 74
Appendix E: Upgrading Firmware 75
Appendix F: Glossary 76
Appendix G: Specifications 82
Appendix H: Regulatory Information 84
Appendix I: Warranty Information 87
Appendix J: Contact Information 88
Wireless-G ADSL Gateway
List of Figures
Figure 2-1: Network 4
Figure 2-2: VPN Gateway-to-VPN Gateway 7
Figure 2-3: Computer-to-VPN Gateway 8
Figure 3-1: Back Panel 9
Figure 3-2: Front Panel 10
Figure 4-1: LAN Connection 12
Figure 4-2: ADSL Connection 12
Figure 4-3: Power Connection 12
Figure 5-1: Password Screen 16
Figure 5-2: Basic Setup Tab 16
Figure 5-3: Dynamic IP 17
Figure 5-4: Static IP 17
Figure 5-5: RFC 1483 Routed 18
Figure 5-6: RFC 2516 PPPoE 18
Figure 5-7: RFC 2364 PPoA 19
Figure 5-8: Bridged Mode Only 19
Figure 5-9: Optional Settings 20
Figure 5-10: DynDNS.org 21
Figure 5-11: Advanced Routing 22
Figure 5-12: Routing Table 23
Figure 5-13: 64-Bit WEP Encryption 24
Figure 5-14: 128-Bit WEP Encryption 24
Figure 5-15: Wireless Network Access 25
Figure 5-16: Networked Computers 25
Figure 5-17: Advanced Wireless Settings 26
Figure 5-18: Firewall 27
Figure 5-19: VPN 28
Figure 5-20: Manual Key Management 29
Figure 5-21: Advanced VPN Tunnel Setup 30
Figure 5-22: Access Restriction 32
Wireless-G ADSL Gateway
Figure 5-23: Internet Policy Summary 32
Figure 5-24: List of PCs 33
Figure 5-25: Port Services 33
Figure 5-26: Single Port Forwarding 34
Figure 5-27: Port Range Forwarding 35
Figure 5-28: Port Triggering 35
Figure 5-29: DMZ 36
Figure 5-30: Management 37
Figure 5-31: Reporting 39
Figure 5-32: Ping Test 40
Figure 5-33: Factory Defaults 40
Figure 5-34: Firmware Upgrade 41
Figure 5-35: Status 42
Figure 5-36: Local Network 43
Figure 5-37: DHCP Clients Table 43
Figure 5-38: Wireless 44
Figure 5-39: DSL Connection 45
Figure C-1: Password Screen 64
Figure C-2: Setup Tab 64
Figure C-3: IP Filter List Tab 64
Figure C-4: IP Filter List 65
Figure C-5: Filters Properties 65
Figure C-6: New Rule Properties 65
Figure C-7: IP Filter List 66
Figure C-8: Filters Properties 66
Figure C-9: New Rule Properties 66
Figure C-10: IP Filter List Tab 67
Figure C-11: Filter Action Tab 67
Figure C-12: Security Methods Tab 67
Figure C-13: Authentication Methods 68
Figure C-14: Preshared Key 68
Figure C-15: New Preshared Key 68
Figure C-16: Tunnel Setting Tab 69
Wireless-G ADSL Gateway
Figure C-17: Connection Type Tab 69
Figure C-18: Properties Screen 69
Figure C-19: IP Filter List Tab 70
Figure C-20: Filter Action Tab 70
Figure C-21: Authentication Methods Tab 70
Figure C-22: Preshared Key 71
Figure C-23: New Preshared Key 71
Figure C-24: Tunnel Seting Tab 71
Figure C-25: Connection Type 72
Figure C-26: Rules 72
Figure C-27: Local Computer 72
Figure D-1: IP Configuration Screen 74
Figure D-2: MAC Address/Adapter Address 74
Figure D-3: MAC Address/Physical Address 75
Figure D-4: MAC Address Filter 75
Figure D-5: MAC Address Clone 75
Figure F-1: Upgrade Firmware 77
Wireless-G ADSL Gateway
Chapter 1: Introduction
Welcome
The Linksys Wireless-G ADSL Gateway is the all-in-one solution for Internet connectivity in your home. The ADSL
Modem function gives you a blazing fast connection to the Internet, far faster than a dial-up, and without tying up
your phone line.
Connect your computers to the Gateway via the built-in 4-port 10/100 Ethernet Switch to jump start your home
network. You can share files, printers, hard drive space and other resources, or play head-to-head computer
games. Attach four computers directly, or connect more hubs and switches to create as big a network as you
need. The built-in Wireless-G (802.11g) Access Point allows up to 32 wireless devices to connect to your network
at a blazing 54Mbps, without running cables through the house. It's also compatible with Wireless-B (802.11b)
devices, at 11Mbps. The Gateway ties it all together and lets your whole network share that high-speed Internet
connection.
To protect your data and privacy, the Wireless-G ADSL Gateway features an advanced firewall to keep Internet
intruders and attackers out. Wireless transmissions can be protected by powerful data encryption. Safeguard
your family with Parental Control features like Internet Access Time Limits and Key Word Blocking. Configuration
is a snap with any web browser.
With the Linksys Wireless-G ADSL Gateway at the heart of your home network, you're connected to the future.
Chapter 1: Introduction
Welcome
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Wireless-G ADSL Gateway
What’s in this Guide?
This user guide covers the steps for setting up and using the Wireless-G ADSL Gateway.
• Chapter 1: Introduction
This chapter describes the Wireless-G ADSL Gateway Wireless-G ADSL Gateway applications 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 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: Configuring IPSec between a Windows 2000 Computer and the Gateway
This appendix instructs you on how to establish a secure IPSec tunnel using preshared keys to join a private
network inside the VPN Gateway and a Windows 2000 or XP computer.
• Appendix D: Upgrading Firmware
This appendix instructs you on how to upgrade the firmware on your Gateway if you should need to do so.
• Appendix E: Finding the MAC Address and IP Address for your Ethernet Adapter.
This appendix describes how to find the MAC address for your computer’s Ethenet adapter so you can use the
MAC filtering and/or MAC address cloning feature of the Gateway.
• Appendix F: Glossary
This appendix gives a brief glossary of terms frequently used in networking.
Chapter 1: Introduction
What’s in this Guide?
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Wireless-G ADSL Gateway
• Appendix G: Specifications
This appendix provides the technical specifications for the Gateway.
• Appendix H: Warranty Information
This appendix supplies the warranty information for the Gateway.
• Appendix I: Regulatory Information
This appendix supplies the regulatory information regarding the Gateway.
• Appendix J: Contact Information
This appendix provides contact information for a variety of Linksys resources, including Technical Support.
Chapter 1: Introduction
What’s in this Guide?
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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
LAN: the computers and networking products that
make up your local 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 Gateway.”
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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 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.
VPN was 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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Wireless-G ADSL Gateway
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 (refer to “Appendix C: Configuring IPSec between a Windows 2000 or XP computer and
the VPN Gateway”). 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. (See Figure 2-2.) 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. (See Figure 2-3.) 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 website at
www.linksys.com or refer to “Appendix C: Configuring IPSec between a Windows 2000 or XP computer and the
VPN Gateway.”
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
Chapter 2: Planning your Network
Why do I need a VPN?
Figure 2-2: Computer-to-VPN Gateway
IMPORTANT: You must have at least one VPN
Gateway on one end of the VPN tunnel. At the
other end of the VPN tunnel, you must have a
second VPN Gateway or a computer with VPN
client software that supports IPSec.
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Wireless-G ADSL Gateway
protect data inside of a local network. But what do you do once information is sent outside of your local network,
when emails 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.
Figure 2-3: VPN Gateway-to-VPN Gateway
3) Man in the Middle Attacks
Once the hacker has either sniffed or spoofed enough information, he can now 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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Wireless-G ADSL Gateway
Chapter 3: Getting to Know the Wireless-G ADSL Gateway
The Back Panel
The Gateway’s ports, where a network cable is connected, are located on the back panel.
Important: Resetting the Gateway to factory
defaults will erase all of your settings (WEP
Figure 3-1: Back Panel
ADSL The ADSL port connects to the ADSL line.
Encryption, Wireless and LAN settings, etc.)
and replace them with the factory defaults. Do
not reset the Gateway if you want to retain
these settings.
LAN (1-4) The LAN (Local Area Network) ports connect to your computer and other network devices.
Power The Power port is where you will connect the power adapter.
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.
With these, and many other, Linksys products, your networking options are limitless. Go to the Linksys website at
www.linksys.com for more information about products that work with the Gateway.
Chapter 3: Getting to Know the Wireless-G ADSL Gateway
The Back Panel
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Wireless-G ADSL Gateway
The Front Panel
The Gateway's LEDs, where information about network activity is displayed, are located on the front panel.
Figure 3-2: Front Panel
Power Green. The Power LED lights up when the Gateway is powered on.
WLAN Green. The WLAN LED lights up whenever there is a successful wireless connection. If the LED
is blinking, the Gateway is actively sending or receiving data to or from one of the devices on
the network.
LAN (1-4) Green. The LAN 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 blinking, it is an
indication of any network activity.
ADSL Green. The ADSL LED lights up whenever there is a successful modem connection. The LED
blinks while establishing the ADSL connection.
Act Green. The Act LED blinks when there is network activity across the ADSL connection.
Session Green. The Session LED lights up when a PPPoE or PPPoA session is established.
Chapter 3: Getting to Know the Wireless-G ADSL Gateway
The Front Panel
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Wireless-G ADSL Gateway
Chapter 4: Connecting the Wireless-G Broadband Gateway
Overview
The Gateway’s setup consists of more than simply plugging hardware together. You will have to configure your
networked computers to accept the IP addresses that the Gateway assigns them (if applicable), and you will also
have to configure the Gateway with setting(s) provided by your Internet Service Provider (ISP).
The installation technician from your ISP should have left the setup information for your modem with you after
installing your broadband connection. If not, you can call your ISP to request that data.
Once 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 Broadband Gateway
Overview
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Wired Connection to a Computer
1. Before you begin, make sure that all of your network’s hardware is powered off, including the Gateway and
all computers.
2. Connect one end of an Ethernet network cable to one of the LAN ports (labeled 1-4) on the back of the
Gateway (see Figure 4-1), and the other end to an Ethernet port on a computer.
3. Repeat this step to connect more computers, a switch, or other network devices to the Gateway.
IMPORTANT: If using microfilters, 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.
4. Connect a phone cable from the ADSL port on the Gateway’s back panel (see Figure 4-2) to the wall jack of
the ADSL line. A small device called a microfilter may be necessary between each phone and wall jack to
prevent interference. Contact your ISP if you have any questions.
5. Connect the power adapter to the Gateway’s Power port (see Figure 4-3), and then plug the power adapter
into a power outlet.
• The Power LED on the front panel will light up green as soon as the power adapter is connected
properly. The Power LED will flash for a few seconds, then it will light up steady when the self-test is
complete. If the LED flashes for one minute or longer, see “Appendix A: Troubleshooting.”
6. Power on one of your computers that is connected to the Gateway.
Wireless Connection to a Computer
If you want to use a wireless connection to access the Gateway, follow these instructions:
1. Before you begin, make sure that all of your network’s hardware is powered off, including the Gateway and
all computers.
Figure 4-1: LAN Connection
Figure 4-2: ADSL Connection
NOTE: You should always plug the Gateway’s power
adapter into a power strip with surge protection.
Chapter 4: Connecting the Wireless-G Broadband Gateway
Wired Connection to a Computer
Figure 4-3: Power Connection
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Wireless-G ADSL Gateway
IMPORTANT: If using microfilters, 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.
2. Connect a phone cable from the ADSL port on the Gateway’s back panel (see Figure 4-2) to the wall jack of
the ADSL line. A small device called a microfilter may be necessary between each phone and wall jack to
prevent interference. Contact your ISP if you have any questions.
3. Connect the power adapter to the Power port (see Figure 4-3), and then plug the power adapter into a power
outlet.
• The Power LED on the front panel will light up green as soon as the power adapter is connected properly.
The Power LED will flash for a few seconds, then light up steady 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 WEP encryption is disabled. After you have
accessed the Gateway, you can change the Gateway and this computer’s adapter settings to match the your
usual network settings.
NOTE: You should always change the SSID from its
default, linksys, and enable WEP encryption.
The Gateway’s hardware installation is now complete.
Go to “Chapter 5: Configuring the Gateway.”
Chapter 4: Connecting the Wireless-G Broadband Gateway
Wireless Connection to a Computer
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Chapter 5: Configuring the 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:
• 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.
There are seven main tabs: Setup, Wireless, Security, Access Restrictions, 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. To enable the Gateway’s Dynamic Domain Name System (DDNS) feature, complete the fields on this
screen.
• Advanced Routing. On this screen, you can alter Dynamic Routing, and Static Routing configurations.
Wireless
• Basic Wireless Settings. You can choose your Wireless Network Mode and Wireless Security on this screen.
Have You: Enabled TCP/IP on your computers?
computers communicate over the network with
this protocol. Refer to Appendix D: Windows
Help for more information on TCP/IP.
Note: For added security, you should change
the password through the Administration tab.
• Wireless Network Access. This screen displays your wireless network access list.
• Advanced Wireless Settings. On this screen you can access the Advanced Wireless features.
Security
• Firewall. This screen contains Filters and Block WAN Requests. Filters block specific internal users from
accessing the Internet and block anonymous Internet requests.
Chapter 5: Configuring the Gateway
Overview
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• VPN. To enable or disable IPSec and/or PPTP Pass-through, and set up VPN tunnels, use this screen.
Access Restrictions
• Internet Access. This screen allows you to prevent or permit only certain users from attaching to your
network.
Applications & Gaming
• Single Port Forwarding. Use this screen to set up common services or applications on your network.
• Port Range Forwarding. To set up public services or other specialized Internet applications on your network,
click this tab.
• Port Triggering. To set up triggered ranges and forwarded ranges for Internet applications, click this tab.
• DMZ. To allow one local user to be exposed to the Internet for use of special-purpose services, use this
screen.
Administration
• Management. On this screen, alter Gateway access privileges, SNMP, and UPnP settings.
• Reporting. If you want to view or save activity logs, click this tab.
• Diagnostics. Use this screen to do a Ping Test.
• Factory Defaults. If you want to restore the Gateway’s factory defaults, use this screen.
• Firmware Upgrade. Click this tab if you want to upgrade the Gateway’s firmware.
Status
• Gateway. This screen provides status information about the Gateway.
• Local Network. This provides status information about the local network.
• Wireless. This screen provides status information about the wireless network.
• DSL Connection. This screen provides status information about the DSL connection.
Chapter 5: Configuring the Gateway
Overview
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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.
A password request page, shown in Figure 5-1 will appear. (non-Windows XP 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. (See Figure 5-2.) 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 Cancel Changes to cancel your changes.
Internet Setup
• VC Settings. Virtual Circuit (VPI and VCI): These fields consist of two items: VPI (Virtual Path Identifier) and VCI
(Virtual Channel Identifier). Your ISP will provide the correct settings for these fields. Multiplexing: Select LLC
or VC , depending on your ISP.
• ADSL Settings. The Gateway supports five Encapsulations: RFC 1483 Bridged, RFC 1483 Routed, RFC 2516
PPPoE, RFC 2364 PPPoA, and Bridged Mode Only. Each Basic Setup screen and available features will differ
depending on what kind of encapsulation you select.
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. (See Figure 5-3.)
Figure 5-1: Password Screen
Chapter 5: Configuring the Gateway
How to Access the Web-based Utility
Figure 5-2: Basic Setup Tab
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Static IP
If you are required to use a permanent IP address to connect to the Internet, then select Use the following IP
Address. (See Figure 5-4.)
• 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.
• Default 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.
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 5-3: Dynamic IP
Figure 5-4: Static IP
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RFC 1483 Routed
If you are required to use RFC 1483 Routed, then select RFC 1483 Routed. (See Figure 5-5.)
• 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.
• Default 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.
RFC 2516 PPPoE
Some DSL-based ISPs use PPPoE (Point-to-Point Protocol over Ethernet) to establish Internet connections. If
you are connected to the Internet through a DSL line, check with your ISP to see if they use PPPoE. If they do,
you will have to enable PPPoE. (See Figure 5-6.)
• Service Name. Enter the Service Name, if required by your ISP.
• User Name and Password. Enter the User Name and Password provided by your ISP.
Figure 5-5: RFC 1483 Routed
• 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. If you wish to activate Connect on
Demand, click the radio button. In the Max Idle Time field, enter the number of minutes you want to have
elapsed before your Internet connection terminates.
• 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 radio button next to Keep Alive. In the Redial Period field, you specify how often
you want the Gateway to check the Internet connection. The default Redial Period is 30 seconds.
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.
Chapter 5: Configuring the Gateway
The Setup Tab
Figure 5-6: 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. (See Figure 5-7.)
• 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 cut 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. If you wish to activate Connect on
Demand, click the radio button. In the Max Idle Time field, enter the number of minutes you want to have
elapsed before your Internet connection terminates.
• Keep Alive Option: 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 radio button next to Keep Alive. In the Redial Period field, you
specify how often you want the Gateway to check the Internet connection. The default Redial Period is 30
seconds.
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 5-7: RFC 2364 PPPoA
Bridged Mode Only
If you are using your Gateway as a bridge, which makes the Gateway act like a standalone modem, select
Bridged Mode Only. (see Figure 5-8). All NAT and routing is disabled in this mode.
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.
Optional Settings (Required by some ISPs) (See Figure 5-9.)
• 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, leaving these
fields blank will work.
Chapter 5: Configuring the Gateway
The Setup Tab
Figure 5-8: Bridged Mode Only
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• MTU. The MTU (Maximum Transmission Unit) setting specifies the largest packet size permitted for network
transmission. Select Manual and enter the value desired. 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). 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.
• Local DHCP Server. DHCP is already enabled by factory default. If you already have a DHCP server on your
network, set the Gateway’s DHCP option to Disable.
• 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.
• Number of Address. Enter the maximum number of computers that you want the DHCP server to assign IP
addresses to. This number cannot be greater than 253. By default, as shown in Figure 5-9, the range is
192.168.1.100 to 192.168.1.149.
• DHCP Address Range. The range of DHCP addresses is displayed here.
• Client Lease Time. Enter the minutes in the field.
• Time Setting. This is where you set the time zone for your Gateway.
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.
Chapter 5: Configuring the Gateway
The Setup Tab
Figure 5-9: Optional Settings
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Wireless-G ADSL Gateway
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.
DDNS
DDNS Service. If your DDNS service is provided by DynDNS.org, then select DynDNS.org in the drop-down menu.
(See Figure 5-10.) To disable DDNS Service, select Disabled.
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.
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.
Chapter 5: Configuring the Gateway
The Setup Tab
Figure 5-10: DynDNS.org
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Advanced Routing Tab
The Advanced Routing screen allows you to configure the dynamic routing and static routing settings. (See Figure
5-11.)
Advanced Routing
• Dynamic Routing. With Dynamic Routing you can enable the Gateway to automatically adjust to physical
changes in the network’s layout. The Gateway, using the RIP protocol, determines the network packets’ route
based on the fewest number of hops between the source and the destination. The RIP protocol regularly
broadcasts routing information to other Gateways on the network. To enable RIP, click Enabled. To disable
RIP, click Disabled.
• 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 None.
• Transmit RIP Version. To transmit RIP messages, select the protocol you want: RIP1, RIP1-Compatible, or
RIP2. If you don’t want to transmit RIP messages, select None.
Static Routing
If the Gateway is connected to more than one network, it may be necessary to set up a static route between
them. A static route is a pre-determined pathway that network information must travel to reach a specific host or
network. To create a static route, change the following settings:
• Select Entry. 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, after selecting the entry, click the Delete Entry button.
• Destination IP Address. The Destination IP Address is the address of the remote network or host to which you
want to assign a static route. Enter the IP address of the host for which you wish to create a static route. If
you are building a route to an entire network, be sure that the network portion of the IP address is set to 0.
• Subnet Mask. The Subnet Mask (also known as the Network Mask) determines which portion of an IP address
is the network portion, and which portion is the host portion.
• Gateway. This IP address should be the IP address of the gateway device that allows for contact between the
Gateway and the remote network or host.
• Hop Count. This determines the maximum number of steps between network nodes that data packets will
travel. A node is any router in the path to the remote network.
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The Setup Tab
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• Interface. Select LAN & Wireless or Internet, depending on the location of the static route’s final destination.
• Show Routing Table. Click the Show Routing Table button to open a screen (see Figure 5-12) displaying how
data is routed through your LAN. For each route, the Destination IP address, Subnet Mask, Gateway, and
Interface are displayed. Click the Refresh button to update the 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.
Figure 5-12: Routing Table
Chapter 5: Configuring the Gateway
The Setup Tab
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