Linksys WRT54G - Wireless-G Broadband Router... User manual

A Division of Cisco Systems, Inc.
®
Model No.
Broadband Router
Wireless-G
WRT54G
User Guide
WIRELESS
GHz
2.4
802.11g

Wireless-G Broadband Router
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 © 2005 Cisco Systems, Inc. All
rights reserved. Other brands and product names are trademarks or registered trademarks of their respective
holders.
How to Use This User Guide
This User Guide has been designed to make understanding networking with the Wireless-G Broadband Router
easier than ever. Look for the following items when reading this User Guide:
In addition to these symbols, there are definitions for technical terms that are presented like this:
Also, each figure (diagram, screenshot, or other image) is provided with a figure number and description, like
this:
Figure numbers and descriptions can also be found in the “List of Figures” section in the “Table of Contents”.
This exclamation point means there is a caution or
warning and is something that could damage your
property or the Wireless-G Broadband Router.
This checkmark means there is a note of interest and
is something you should pay special attention to
while using the Wireless-G Broadband Router.
This question mark provides you with a reminder
about something you might need to do while using
the Wireless-G Broadband Router.
word: definition.
Figure 0-1: Sample Figure Description
WRT54G_V4-UG-50728 BW
WARNING: This product contains chemicals, including lead, known
to the State of California to cause cancer, and birth defects or other
reproductive harm. Wash hands after handling.

Wireless-G Broadband Router
Table of Contents
Chapter 1: Introduction 1
Welcome 1
What’s in this User Guide? 2
Chapter 2: Planning Your Wireless Network 4
Network Topology 4
Ad-Hoc versus Infrastructure Mode 4
Network Layout 4
Chapter 3: Getting to Know the Wireless-G Broadband Router 6
The Back Panel 6
The Front Panel 7
Chapter 4: Connecting the Wireless-G Broadband Router 8
Overview 8
Hardware Installation for Connection to Your Broadband Modem 8
Hardware Installation for Connection to Another Router 10
Chapter 5: Setting up the Wireless-G Broadband Router 12
Overview 12
Using the Setup Wizard 12
Using SecureEasySetup to Configure Your Notebook 29
Chapter 6: Configuring the Wireless-G Broadband Router 32
Overview 32
The Setup Tab - Basic Setup 33
The Setup Tab - DDNS 37
The Setup Tab - MAC Address Clone 38
The Setup Tab - Advanced Routing 39
The Wireless Tab - Basic Wireless Settings 40
The Wireless Tab - Wireless Security 41
The Wireless Tab - Wireless MAC Filter 44
The Wireless Tab - Advanced Wireless Settings 45
The Security Tab - Firewall 47
The Security Tab - VPN Passthrough 47
The Access Restrictions Tab - Internet Access 48
The Applications and Gaming Tab - Port Range Forward 50

Wireless-G Broadband Router
The Applications & Gaming Tab - Port Triggering 51
The Applications and Gaming Tab - DMZ 52
The Applications and Gaming Tab - QoS 52
The Administration Tab - Management 54
The Administration Tab - Log 54
The Administration Tab - Diagnostics 55
The Administration Tab - Factory Defaults 56
The Administration Tab - Firmware Upgrade 56
The Administration Tab - Config Management 56
The Status Tab - Router 57
The Status Tab - Local Network 58
The Status Tab - Wireless 59
Appendix A: Troubleshooting 60
Common Problems and Solutions 60
Frequently Asked Questions 68
Appendix B: Wireless Security 75
Security Precautions 75
Security Threats Facing Wireless Networks 75
Appendix C: Upgrading Firmware 78
Appendix D: Windows Help 79
Appendix E: Finding the MAC Address and IP Address for Your Ethernet Adapter 80
Windows 98SE or Me Instructions 80
Windows 2000 or XP Instructions 80
For the Router’s Web-based Utility 81
Appendix F: Glossary 82
Appendix G: Specifications 89
Appendix H: Warranty Information 91
Appendix I: Regulatory Information 92
Appendix J: Contact Information 94

Wireless-G Broadband Router
List of Figures
Figure 3-1: The Router’s Back Panel 6
Figure 3-2: The Router’s Front Panel 7
Figure 4-1: Connecting Your Internet Connection 8
Figure 4-2: Connecting Your Network Devices 9
Figure 4-3: Connecting the Power 9
Figure 4-4: Diagram for Connection to Another Router 10
Figure 4-5: Connecting Another Router 10
Figure 4-6: Connecting Your Network Devices 11
Figure 4-7: Connecting the Power 11
Figure 5-1: Setup Wizard’s Welcome - Language Selection Screen 12
Figure 5-2: Setup Wizard’s Welcome - Start Wizard Screen 12
Figure 5-3: Setup Wizard’s License Agreement Screen 13
Figure 5-4: Setup Wizard’s Disconnect the Modem from the PC Screen 13
Figure 5-5: Setup Wizard’s Connect the Modem to the Router Screen 14
Figure 5-6: Setup Wizard’s Connect a Network Cable to a PC Screen 14
Figure 5-7: Setup Wizard’s Connect the Network Cable to the Router Screen 15
Figure 5-8: Setup Wizard’s Power on the Router Screen 15
Figure 5-9: Setup Wizard’s Check the Router’s Status Screen 16
Figure 5-10: Setup Wizard’s Configure Cable or DHCP Settings Screen 16
Figure 5-11: Setup Wizard’s Configure DSL (PPPoE) Settings Screen 17
Figure 5-12: Setup Wizard’s Advanced Internet Settings - Static IP Screen 17
Figure 5-13: Setup Wizard’s Advanced Internet Settings - PPTP Screen 18
Figure 5-14: Setup Wizard’s Keep Alive/Connect on Demand (PPTP Continued) Screen 18
Figure 5-15: Setup Wizard’s Advanced Internet Settings - L2TP Screen 19
Figure 5-16: Setup Wizard’s Advanced Internet Settings - Telstra Screen 20
Figure 5-17: Setup Wizard’s Set the Router’s Password Screen 21
Figure 5-18: Setup Wizard’s Configure Wireless Settings Screen 21
Figure 5-19: Setup Wizard’s SecureEasySetup Screen 22
Figure 5-20: SecureEasySetup Logo 22
Figure 5-21: Additional Information - Hardware Button 22
Figure 5-22: Additional Information - Software Button 22

Wireless-G Broadband Router
Figure 5-23: Setup Wizard’s Configure Wireless Settings Screen 23
Figure 5-24: Setup Wizard’s Confirm New Settings Screen 23
Figure 5-25: Setup Wizard’s Safe Surfing Screen 24
Figure 5-26: Setup Wizard’s Congratulations Screen 24
Figure 5-27: Setup Wizard’s Configure Wireless Settings Screen 25
Figure 5-28: Setup Wizard’s Wireless Settings Screen 25
Figure 5-29: Setup Wizard’s Wireless Security - WPA-PSK Screen 26
Figure 5-30: Setup Wizard’s Wireless Security - WEP (64-Bit) Screen 27
Figure 5-32: Setup Wizard’s Confirm New Settings Screen 27
Figure 5-31: Setup Wizard’s Norton Screen 28
Figure 5-33: Setup Wizard’s Congratulations Screen 28
Figure 5-34: Setup Wizard’s Welcome - Start Wizard Screen 29
Figure 5-35: SecureEasySetup Welcome Screen 29
Figure 5-36: Configure Wireless Settings #1 Screen 30
Figure 5-37: Configure Wireless Settings #2 Screen 30
Figure 5-38: Your Wireless Settings Screen 31
Figure 6-1: Password Screen 32
Figure 6-2: Setup Tab - Basic Setup 33
Figure 6-3: DHCP Connection Type 33
Figure 6-4: Static IP Connection Type 33
Figure 6-5: PPPoE Connection Type 34
Figure 6-6: PPTP Connection Type 34
Figure 6-7: HeartBeat Signal Connection Type 35
Figure 6-8: Optional Settings 35
Figure 6-9: Router IP 36
Figure 6-10: Network Address Server Settings 36
Figure 6-11: Time Setting 36
Figure 6-12: Setup Tab - DDNS 37
Figure 6-13: Setup Tab - MAC Address Clone 38
Figure 6-14: Setup Tab - Advanced Routing (Gateway) 39
Figure 6-15: Setup Tab - Advanced Routing (Router) 39
Figure 6-16: Wireless Tab - Basic Wireless Settings 40
Figure 6-17: Wireless Tab - Wireless Security (WPA Personal) 41
Figure 6-18: Wireless Tab - Wireless Security (WPA Enterprise) 41

Wireless-G Broadband Router
Figure 6-19: Wireless Tab - Wireless Security (WPA2 Personal) 42
Figure 6-20: Wireless Tab - Wireless Security (WPA2 Enterprise) 42
Figure 6-21: Wireless Tab - Wireless Security (RADIUS) 43
Figure 6-22: Wireless Tab - Wireless Security (WEP) 43
Figure 6-23: Wireless Tab - Wireless MAC Filter 44
Figure 6-24: MAC Address Filter List 44
Figure 6-25: Wireless Tab - Advanced Wireless Settings 45
Figure 6-26: Security Tab - Firewall 47
Figure 6-27: Security Tab - VPN Passthrough 47
Figure 6-28: Access Restrictions Tab - Internet Access 48
Figure 6-29: Internet Policy Summary 48
Figure 6-30: List of PCs 48
Figure 6-31: Port Services 49
Figure 6-32: Access Restrictions Tab - Inbound Traffic 49
Figure 6-33: Applications and Gaming Tab - Port Range Forward 50
Figure 6-34: Applications and Gaming Tab - Port Triggering 51
Figure 6-35: Applications and Gaming Tab - DMZ 52
Figure 6-36: Applications and Gaming Tab - QOS 52
Figure 6-37: Administration Tab - Management 54
Figure 6-38: Administration Tab - Log 54
Figure 6-39: Administration Tab - Diagnostics 55
Figure 6-40: The Ping Test 55
Figure 6-41: The Traceroute Test 55
Figure 6-42: Administration Tab - Factory Defaults 56
Figure 6-43: Administration Tab - Firmware Upgrade 56
Figure 6-44: Administration Tab - Config Management 56
Figure 6-45: Status Tab - Router 57
Figure 6-46: Status Tab - Local Network 58
Figure 6-47: DHCP Clients Table 58
Figure 6-48: Status Tab - Wireless 59
Figure C-1: Upgrade Firmware 78
Figure E-1: IP Configuration Screen 80
Figure E-2: MAC Address/Adapter Address 80
Figure E-3: MAC Address/Physical Address 80
Figure E-4: MAC Address Filter List 81

Wireless-G Broadband Router
Figure E-5: MAC Address Clone 81

1
Chapter 1: Introduction
Welcome
Wireless-G Broadband Router
Chapter 1: Introduction
Welcome
Thank you for choosing the Linksys Wireless-G Broadband Router. The Wireless-G Broadband Router will allow
you to network wirelessly better than ever, sharing Internet access, files and fun, easily and securely.
How does the Wireless-G Broadband Router do all of this? A router is a device that allows access to an Internet
connection over a network. With the Wireless-G Broadband Router, this access can be shared over the four
switched ports or via the wireless broadcast at up to 11Mbps for Wireless-B or up to 54Mbps for Wireless-G.
Use the WPA standard to secure your wireless network while the whole network is protected through a Stateful
Packet Inspection (SPI) firewall and Network Address Translation (NAT) technology. The Router’s
SecureEasySetup™ feature makes it a snap to set up WPA when you have other SecureEasySetup devices—
notebooks, printers, other peripherals—comprising your network. Run the Setup Wizard and it will guide you
through the steps. You can also access the Router’s features through the easy-to-use, browser-based utility.
But what does all of this mean?
Networks are useful tools for sharing 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 are not only useful in homes and offices, they can also be fun.
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. The Wireless-G Broadband Router bridges wireless networks of both
802.11b and 802.11g standards and wired networks, allowing them to communicate with each other.
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 Broadband Router protects your networks from
unauthorized and unwelcome users.
Linksys recommends using the Setup CD-ROM for first-time installation of the Router. 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
Wireless-G Broadband Router, 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 Broadband Router.
lan (local area network): The computers and
networking products that make up the network in
your home or office.
nat (network address translation): NAT technology
translates IP addresses of a local area network to a
different IP address for the Internet.
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.

2
Chapter 1: Introduction
What’s in this User Guide?
Wireless-G Broadband Router
What’s in this User Guide?
This user guide covers the steps for setting up and using the Wireless-G Broadband Router.
• Chapter 1: Introduction
This chapter describes the Router’s applications and this User Guide.
• Chapter 2: Planning Your Wireless Network
This chapter describes the basics of wireless networking.
• Chapter 3: Getting to Know the Wireless-G Broadband Router
This chapter describes the physical features of the Router.
• Chapter 4: Connecting the Wireless-G Broadband Router
This chapter instructs you on how to connect the Router to your network.
• Chapter 5: Setting up the Wireless-G Broadband Router
This chapter walks you through the steps of the Wireless-G Broadband Router’s Setup Wizard to configure its
settings. It also covers the instructions for using the Router’s SecureEasySetup feature to create your
wireless network.
• Chapter 6: Configuring the Wireless-G Broadband Router
This chapter explains how to use the Web-based Utility to configure the settings on the Wireless-G Broadband
Router.
• Appendix A: Troubleshooting
This appendix describes some problems and solutions, as well as frequently asked questions, regarding
installation and use of the Wireless-G Broadband Router.
• Appendix B: Wireless Security
This appendix explains the risks of wireless networking and some solutions to reduce the risks.
• Appendix C: Upgrading Firmware
This appendix instructs you on how to upgrade the firmware on the Router should you need to do so.
• Appendix D: Windows Help
This appendix describes how you can use Windows Help for instructions about networking, such as installing
the TCP/IP protocol.