Linksys WRT54GP2 - Wireless-G Broadband Router Guide

A Division of Cisco Systems, Inc.
®
Model No.
Broadband Router with 2 Phone Ports
Wireless-G
WRT54GP2
GHz
2.4
802.11g
Installation and Troubleshooting Guide
VoIP
VoIP

Wireless-G Broadband Router with 2 Phone Ports
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 Guide
Your guide to the Wireless-G Broadband Router with 2 Phone Ports has been designed to make understanding
networking with the Router easier than ever. Look for the following items when reading this 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.
This exclamation point means there is a caution or warning and is
something that could damage your property or the Router.
Thisquestion markprovides youwith areminderaboutsomethingyou
might need to do while using the Router.
This checkmark means there is a note of interest and is something you
should pay special attention to while using the Router.
word: definition.
Figure 0-1: Sample Figure Description
WRT54GP2-UG-50112D JL
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 with 2 Phone Ports

Wireless-G Broadband Router with 2 Phone Ports
Table of Contents
Chapter 1: Introduction 1
Welcome 1
What’s in this Guide? 2
Chapter 2: Planning Your Wireless Network 5
Network Topology 5
Ad-Hoc versus Infrastructure Mode 5
Network Layout 6
Chapter 3: Getting to Know the Router 7
The Back Panel 7
The Front Panel 8
Chapter 4: Connecting the Router 9
Overview 9
Connection Instructions 10
Chapter 5: Configuring the Router 11
Overview 11
How to Access the Web-based Utility 14
The Setup Tab - Basic Setup 15
The Setup Tab - DDNS 22
The Setup Tab - MAC Address Clone 24
The Setup Tab - Advanced Routing 25
The Wireless Tab - Basic Wireless Settings 27
The Wireless Tab - Wireless Security 28
The Wireless Tab - Wireless Network Access 30
The Wireless Tab - Advanced Wireless Settings 31
The Security Tab - Filter 33
The Security Tab - VPN Passthrough 35
The Voice Tab 36
The Applications & Gaming Tab - Port Range Forwarding 36
The Applications & Gaming Tab - Port Triggering 37
The Applications & Gaming Tab - UPnP Forwarding 38
The Applications & Gaming Tab - DMZ 41
The Applications & Gaming Tab - QoS 42
The Administration Tab - Management 45
The Administration Tab - Log 47
The Administration Tab - Factory Defaults 48
The Administration Tab - Firmware Upgrade 48
The Status Tab - Voice 49
The Status Tab - Router 50
The Status Tab - Local Network 51
The Status Tab - Wireless 52
Appendix A: Troubleshooting 53
Common Problems and Solutions 53
Frequently Asked Questions 67
Appendix B: Wireless Security 77
Security Precautions 77
Security Threats Facing Wireless Networks 78

Wireless-G Broadband Router with 2 Phone Ports
Appendix C: Finding the MAC Address and
IP Address for Your Ethernet Adapter 81
Windows 98 or Me Instructions 81
Windows 2000 or XP Instructions 82
For the Router’s Web-based Utility 82
Appendix D: Windows Help 83
Appendix E: Glossary 85
Appendix F: Specifications 93
Appendix G: Warranty Information 95
Appendix H: Regulatory Information 97
Appendix I: Contact Information 99
Vonage 99
Linksys 99

Wireless-G Broadband Router with 2 Phone Ports
List of Figures
Figure 3-1: Back Panel 7
Figure 3-2: Front Panel 8
Figure 4-1: Router Connection Diagram 9
Figure 4-1: Connect a PC 10
Figure 4-2: Connect a Telephone 10
Figure 4-3: Connect the Modem 10
Figure 4-4: Connect the Power 10
Figure 5-1: Router’s IP Address 14
Figure 5-2: Router Login 14
Figure 5-3: Setup Tab - Basic Setup (Obtain an
IP automatically) 15
Figure 5-4: Static IP 16
Figure 5-5: PPPoE 17
Figure 5-6: RAS (for Singtel) 17
Figure 5-7: PPTP 18
Figure 5-8: Heart Beat Signal 19
Figure 5-9: Setup Tab - DDNS (DynDNS.org) 23
Figure 5-10: Setup Tab - DDNS (TZO.com) 23
Figure 5-11: Setup Tab - MAC Address Clone 24
Figure 5-12: Setup Tab - Advanced Routing 25
Figure 5-13: Routing Table Entry List 26
Figure 5-14: Wireless Tab - Basic Wireless Settings 27
Figure 5-15: Wireless Tab - Wireless Security
(WPA Pre-Shared Key) 28
Figure 5-16: Wireless Tab - Wireless Security (WPA RADIUS) 29
Figure 5-17: Wireless Tab - Wireless Security (WEP) 29
Figure 5-18: Wireless Tab - Wireless Network Access 30
Figure 5-19: Wireless Client MAC List 30
Figure 5-20: Advanced Wireless Settings 31
Figure 5-21: Security Tab - Filter 33
Figure 5-22: Filtered MAC Address 34
Figure 5-23: Security Tab - VPN Passthrough 35
Figure 5-24: Voice Tab 36
Figure 5-25: Applications & Gaming Tab - Port
Range Forwarding 36
Figure 5-26: Applications & Gaming Tab - Port Triggering 37
Figure 5-27: Applications & Gaming Tab - UPnP Forwarding 38
Figure 5-28: Applications & Gaming Tab - DMZ 41
Figure 5-29: Applications & Gaming Tab - QoS 42
Figure 5-30: Administration Tab - Management 45
Figure 5-31: Back up & Restore Configuration 46
Figure 5-32: Administration Tab - Log 47
Figure 5-33: Incoming Log Table 47
Figure 5-34: Outgoing Log Table 47
Figure 5-35: Administration Tab - Factory Defaults 48
Figure 5-36: Administration Tab - Firmware Upgrade 48
Figure 5-37: Status Tab - Voice 49
Figure 5-38: Status Tab - Router 50

Wireless-G Broadband Router with 2 Phone Ports
Figure 5-39: Status Tab - Local Network 51
Figure 5-40: DHCP Active IP Table 51
Figure 5-41: Status Tab - Wireless 52
Figure C-1: IP Configuration Screen 81
Figure C-2: MAC/Adapter Address 81
Figure C-3: MAC/Physical Address 82
Figure C-4: MAC Address Clone 82
Figure C-5: MAC Address Filter 82

Wireless-G Broadband Router with 2 Phone Ports
1
Chapter 1: Introduction
Welcome
Chapter 1: Introduction
Welcome
Thank you for choosing the Linksys Wireless-G Broadband Router with 2 Phone Ports. This Router will allow you
to network wirelessly better than ever, sharing Internet access, files and fun, easily and securely. Plus, after you
have set up your Vonage service, you can make phone or fax calls using your Internet connection.
How does the 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 with 2 Phone Ports, this access can be shared over the three
switched ports or via the wireless broadcast at either up to 11Mbps for Wireless-B or up to 54Mbps for
Wireless-G. In addition, the WPA standard provides greater security opportunities while the whole network is
protected through NAT technology. All of these security features, as well as full configurability, are accessed
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. Multiple computers can share
Internet access, so you don’t need more than one high-speed Internet connection. After you set up your Vonage
account, you can also use your Internet access to make Internet phone or fax calls, even while you’re surfing the
Internet. Plus, 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. All the while, the Router
protects your networks from unauthorized and unwelcome users. So, networks not only are useful in homes and
offices, but also can 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”.
ethernet: an IEEE standard network
protocol that specifies how data is
placed on and retrieved from a common
transmission medium.
lan (local area network): the computers
and networking products that make up
the network in your home or office.
browser: an application program that
providesa way to look at and interact
with all the information on the World
Wide Web.
mbps: one million bits per second; a unit
of measurement for data transmission.
nat (network address translation): NAT
technology translated 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.

Wireless-G Broadband Router with 2 Phone Ports
2Chapter 1: Introduction
What’s in this Guide?
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, which is sometimes
called a Wireless Local Area Network (WLAN). The Router bridges wireless networks of both 802.11b and
802.11g standards and wired networks, allowing them to communicate with each other.
To create your network, install and set up the Router. To guide you through the process, Linksys strongly
recommends that you run the Setup Wizard on the Setup CD-ROM. If you prefer to manually set up the Router,
use the instructions in the Quick Installation or this Installation and Troubleshooting Guide to help you. These
instructions should be all you need to get the most out of the Wireless-G Broadband Router with 2 Phone Ports.
What’s in this Guide?
This guide covers the basic steps for setting up a network with a router. After going through “Chapter 3: Getting
to Know the Router,” most users will only need to use the following chapters:
• Chapter 4: Connecting the Router
This chapter instructs you on how to connect the Router to your cable or DSLmodem, PCs, and telephones
(or fax machines).
• Chapter 5: Configuring the Router
This chapter explains how to configure the Router using your web browser and the Router’s Web-based
Utility. You will configure the Router using the settings provided by your ISP.
When you’re finished with the basic steps, then you are ready to connect to the Internet.
802.11b: an IEEE wireless networking
standard that specifies a maximum data
transfer rate of 11Mbps and an operating
frequency of 2.4GHz.
802.11g: an IEEE wireless networking
standard that specifies a maximum data
transfer rate of 54Mbps, an operating
frequency of 2.4GHz, and backward
compatibility with 802.11b devices.