Cisco WRT54GP2 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 © 2004 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.
This question mark provides you with a reminder about something you
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-41004B 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 with 2 Phone Ports
TableofContents
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 11
Overview 11
Connection Instructions 12
Chapter 5: Configuring the Router 13
Overview 13
How to Access the Web-based Utility 16
The Setup Tab - Basic Setup 17
The Setup Tab - DDNS 24
The Setup Tab - MAC Address Clone 26
The Setup Tab - Advanced Routing 27
The Wireless Tab - Basic Wireless Settings 29
The Wireless Tab - Wireless Security 30
The Wireless Tab - Wireless Network Access 32
The Wireless Tab - Advanced Wireless Settings 33
The Security Tab - Filter 35
The Security Tab - VPN Passthrough 37
The Voice Tab 38
The Applications & Gaming Tab - Port Range Forwarding 38
The Applications & Gaming Tab - Port Triggering 39
The Applications & Gaming Tab - UPnP Forwarding 40
The Applications & Gaming Tab - DMZ 43
The Applications & Gaming Tab - QoS 44
The Administration Tab - Management 47
The Administration Tab - Log 49
The Administration Tab - Factory Defaults 50
The Administration Tab - Firmware Upgrade 50
The Status Tab - Voice 51
The Status Tab - Router 52
The Status Tab - Local Network 53
The Status Tab - Wireless 54
Appendix A: Troubleshooting 55
Common Problems and Solutions 55
Frequently Asked Questions 69
Appendix B: Wireless Security 81
Security Precautions 81
Security Threats Facing Wireless Networks 82
Appendix C: Finding the MAC Address and IP Address
for Your Ethernet Adapter 85

Wireless-G Broadband Router with 2 Phone Ports
Windows 98 or Me Instructions 85
Windows 2000 or XP Instructions 86
For the Router’s Web-based Utility 86
Appendix D: Windows Help 87
Appendix E: Glossary 89
Appendix F: Specifications 97
Appendix G: Warranty Information 99
Appendix H: Regulatory Information 101
Appendix I: Contact Information 103

Wireless-G Broadband Router with 2 Phone Ports
ListofFigures
Figure 3-1: Back Panel 7
Figure 3-2: Front Panel 8
Figure 4-1: Router Connection Diagram 11
Figure 4-1: Connect a PC 12
Figure 4-2: Connect a Telephone 12
Figure 4-3: Connect the Modem 12
Figure 4-4: Connect the Power 12
Figure 5-1: Router’s IP Address 16
Figure 5-2: Router Login 16
Figure 5-3: Setup Tab - Basic Setup
(Obtain an IP automatically) 17
Figure 5-4: Static IP 18
Figure 5-5: PPPoE 19
Figure 5-6: RAS (for Singtel) 19
Figure 5-7: PPTP 20
Figure 5-8: Heart Beat Signal 21
Figure 5-9: Setup Tab - DDNS (DynDNS.org) 25
Figure 5-10: Setup Tab - DDNS (TZO.com) 25
Figure 5-11: Setup Tab -
MAC Address Clone 26
Figure 5-12: Setup Tab -
Advanced Routing 27
Figure 5-13: Routing Table Entry List 28
Figure 5-14: Wireless Tab - Basic Wireless Settings 29
Figure 5-15: Wireless Tab - Wireless Security (WPA
Pre-Shared Key) 30
Figure 5-16: Wireless Tab - Wireless Security
(WPA RADIUS) 31
Figure 5-17: Wireless Tab - Wireless Security (WEP) 31
Figure 5-18: Wireless Tab - Wireless Network Access 32
Figure 5-19: Wireless Client MAC List 32
Figure 5-20: Advanced Wireless Settings 33
Figure 5-21: Security Tab - Filter 35
Figure 5-22: Filtered MAC Address 36
Figure 5-23: Security Tab - VPN Passthrough 37
Figure 5-24: Voice Tab 38
Figure 5-25: Applications & Gaming Tab - Port Range
Forwarding 38
Figure 5-26: Applications & Gaming Tab - Port Triggering 39
Figure 5-27: Applications & Gaming Tab - UPnP Forwarding 40
Figure 5-28: Applications & Gaming Tab - DMZ 43
Figure 5-29: Applications & Gaming Tab - QoS 44
Figure 5-30: Administration Tab - Management 47
Figure 5-31: Back up & Restore Configuration 48

Wireless-G Broadband Router with 2 Phone Ports
Figure 5-32: Administration Tab - Log 49
Figure 5-33: Incoming Log Table 49
Figure 5-34: Outgoing Log Table 49
Figure 5-35: Administration Tab -
Factory Defaults 50
Figure 5-36: Administration Tab - Firmware Upgrade 50
Figure 5-37: Status Tab - Voice 51
Figure 5-38: Status Tab - Router 52
Figure 5-39: Status Tab - Local Network 53
Figure 5-40: DHCP Active IP Table 53
Figure 5-41: Status Tab - Wireless 54
Figure C-1: IP Configuration Screen 85
Figure C-2: MAC/Adapter Address 85
Figure C-3: MAC/Physical Address 86
Figure C-4: MAC Address Clone 86
Figure C-5: MAC Address Filter 86

Wireless-G Broadband Router with 2 Phone Ports
1
Chapter 1: Introduction
Welcome
Chapter1: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 Internet phone 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 Internet
phone 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
provides a 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 DSL modem, 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.

Wireless-G Broadband Router with 2 Phone Ports
3
Chapter 1: Introduction
What’s in this Guide?
You also have other chapters available for reference:
• Chapter 1: Introduction
This chapter describes the Router’s applications and this Installation and Troubleshooting Guide.
• Chapter 2: Planning Your Wireless Network
This chapter describes the basics of wireless networking.
• Appendix A: Troubleshooting
This appendix describes some possible problems and solutions, as well as frequently asked questions,
regarding installation and use of the Router.
• 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 instructs you on how to find the MAC address or Ethernet address of your PC’s Ethernet
network adapter.
• Appendix D: Windows Help
This appendix describes how you can use Windows Help for instructions about networking, such as
installing the TCP/IP protocol.
• 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 Router.
• Appendix G: Warranty Information
This appendix supplies the warranty information for the Router.

Wireless-G Broadband Router with 2 Phone Ports
4Chapter 1: Introduction
What’s in this Guide?
• Appendix H: Regulatory Information
This appendix supplies the regulatory information regarding the Router.
• Appendix I: Contact Information
This appendix provides contact information for a variety of Linksys resources, including Technical Support.

Wireless-G Broadband Router with 2 Phone Ports
5
Chapter 2: Planning Your Wireless Network
Network Topology
Chapter2:PlanningYourWirelessNetwork
Network Topology
A wireless local area network (WLAN) is exactly like a regular local area network (LAN), except that each
computer in the WLAN uses a wireless device to connect to the network. Computers in a WLAN share the same
frequency channel and SSID, which is an identification name shared by the wireless devices belonging to the
same wireless network.
Ad-Hoc versus Infrastructure Mode
Unlike wired networks, wireless networks have two different modes in which they may be set up: infrastructure
and ad-hoc. An infrastructure configuration is a WLAN and wired LAN communicating to each other through an
access point. An ad-hoc configuration is wireless-equipped computers communicating directly with each other.
Choosing between these two modes depends on whether or not the wireless network needs to share data or
peripherals with a wired network or not.
If the computers on the wireless network need to be accessible by a wired network or need to share a
peripheral, such as a printer, with the wired network computers, the wireless network should be set up in
Infrastructure mode. The basis of Infrastructure mode centers around an access point or wireless router, such as
the Wireless-G Broadband Router with 2 Phone Ports, which serves as the main point of communications in a
wireless network. The Router transmits data to PCs equipped with wireless network adapters, which can roam
within a certain radial range of the Router. You can arrange the Router and multiple access points to work in
succession to extend the roaming range, and you can set up your wireless network to communicate with your
Ethernet hardware as well.
infrastructure: a wireless network
that is bridged to a wired network via
an access point.
ssid: your wireless network’s name.
ad-hoc: a group of wireless devices
communicating directly to each other
(peer-to-peer) without the use of an
access point.
adapter: a device that adds network
functionality to your PC.
network: a series of computers or
devices connected for the purpose of
data sharing, storage, and/or
transmission between users.
ethernet: IEEE standard network
protocol that specifies how data is
placed on and retrieved from a common
transmission medium.

Wireless-G Broadband Router with 2 Phone Ports
6Chapter 2: Planning Your Wireless Network
Network Layout
If the wireless network is relatively small and needs to share resources only with the other computers on the
wireless network, then the Ad-Hoc mode can be used. Ad-Hoc mode allows computers equipped with wireless
transmitters and receivers to communicate directly with each other, eliminating the need for a wireless router or
access point. The drawback of this mode is that in Ad-Hoc mode, wireless-equipped computers are not able to
communicate with computers on a wired network. And, of course, communication between the wireless-
equipped computers is limited by the distance and interference directly between them.
Network Layout
The Wireless-G Broadband Router with 2 Phone Ports has been specifically designed for use with both your
802.11b and 802.11g products. It is compatible with all 802.11b and 802.11g adapters, such as the Notebook
Adapters (WPC54G, WPC11) for your laptop computers, PCI Adapter (WMP54G, WMP11) for your desktop PC, and
USB Adapter (WUSB54G, WUSB11) when you want to enjoy USB connectivity. The Broadband Router will also
communicate with the Wireless PrintServer (WPS54GU2, WPS11) and Wireless Ethernet Bridges (WET54G,
WET11).
When you wish to connect your wireless network with your wired network, you can use the Broadband Router’s
three LAN ports. To add more ports, any of the Broadband Router's LAN ports can be connected to any of
Linksys's switches (such as the EZXS55W or EZXS88W).
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 Wireless-G Broadband Router with
2 Phone Ports.
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.

Wireless-G Broadband Router with 2 Phone Ports
7
Chapter 3: Getting to Know the Router
The Back Panel
Chapter3:GettingtoKnowtheRouter
The Back Panel
The Router’s ports and the Reset button are located on the back panel of the Router.
Internet This Internet port connects to your cable or DSL modem.
Phone1 For your primary Internet phone line, the Phone1 port allows you to connect the Router to
your telephone (or fax machine) using an RJ-11 telephone cable (not included).
Phone2 If you have a second Internet phone line, the Phone2 port allows you to connect the
Router to your second telephone (or fax machine) using an RJ-11 telephone cable (not
included).
Ethernet 1-3 These three Ethernet ports connect to network devices, such as PCs or more switches.
Reset Button There are two ways to reset the Router's factory defaults. Either press the Reset Button for
five seconds, or restore the defaults from the Router's Web-based Utility.
Figure 3-1: Back Panel
NOTE: The Factory Default
feature of the Router’s Web-
based Utility is protected by a
password available only from
Internet phone service provider.
Contact your provider for more
information.

Wireless-G Broadband Router with 2 Phone Ports
8Chapter 3: Getting to Know the Router
The Front Panel
Power The Power port is where you will connect the power adapter.
The Front Panel
The Router’s LEDs, which inform you about network activities, are located on the front panel.
Power Green. The Power LED lights up when the Router is powered on. If the LED is flashing, the
Router is booting up, running a system self-test, or upgrading its firmware.
WLAN Green. The WLAN LED lights up when there is an active wireless connection. If the LED is
flashing, the Router is sending or receiving data over the wireless network.
Ethernet 1-3 Green. The Ethernet LED serves two purposes. If the LED is solidly lit, the Router is
connected to a device through the corresponding port (Ethernet 1, 2, or 3). If the LED is
flashing, the Router is sending or receiving data over that port.
Phone 1-2 Green. The Phone LED is solidly lit when a telephone or fax machine has a registered
connection to Internet phone service through the corresponding port (Phone 1 or 2). (The
connection is registered if your Internet phone service account is active.) Otherwise, the
LED does not light up. It flashes when the phone is being used or an incoming call has been
detected.
Figure 3-2: Front Panel

Wireless-G Broadband Router with 2 Phone Ports
9
Chapter 3: Getting to Know the Router
The Front Panel
Internet Green. The Internet LED lights up when the Router is connected to your cable or DSL
modem. If the LED is flashing, the Router is sending or receiving data over the Internet port.
Proceed to “Chapter 4: Connecting the Router.”

Wireless-G Broadband Router with 2 Phone Ports
10 Chapter 3: Getting to Know the Router
The Front Panel

Wireless-G Broadband Router with 2 Phone Ports
11
Chapter 4: Connecting the Router
Overview
Chapter4:ConnectingtheRouter
Overview
To begin installation of the Router, you will connect the Router to your PCs, telephone(s) or fax machine(s), and
cable or DSL modem. The following connection diagram illustrates a basic network setup wired connections to
one desktop PC and telephone and a wireless connection to one notebook PC.
Figure 4-1: Router Connection Diagram
Telephone
Router
Cable/DSL
Modem
Internet
Desktop PC
Notebook PC

Wireless-G Broadband Router with 2 Phone Ports
12 Chapter 4: Connecting the Router
Connection Instructions
Connection Instructions
1. Before you begin, make sure that all of your hardware is powered off, including the Router, PCs, switches,
and cable or DSL modem.
2. Connect one end of an Ethernet network cable to one of the numbered ports on the back of the Router.
Connect the other end to an Ethernet port on a network device, e.g., a PC, print server, or switch.
Repeat this step to connect more PCs or other network devices to the Router.
3. Plug a standard telephone into the Router’s Phone1 port.
4. If you have a second Internet phone or fax line, repeat step 3 to connect a telephone or fax machine to the
Router’s Phone2 port.
5. Connect your cable or DSL modem’s Ethernet cable to the Router’s Internet port.
6. Power on the cable or DSL modem.
7. Connect the included power adapter to the Router’s Power port, and then plug the power adapter into an
electrical outlet. The Power LED on the front panel will light up when the adapter is connected properly.
8. Power on your PC(s).
Proceed to “Chapter 5: Configuring the Router.”
Figure 4-2: Connect a Telephone
Figure 4-3: Connect the Modem
Figure 4-1: Connect a PC
NOTE: Make sure your telephone is set to its tone setting (not pulse).
Figure 4-4: Connect the Power

Wireless-G Broadband Router with 2 Phone Ports
11
Chapter 5: Configuring the Router
Overview
Chapter5:ConfiguringtheRouter
Overview
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 you can use the Web-based Utility to configure the Router. For
advanced users, you may configure the Router’s advanced settings through the Web-based Utility.
This chapter will describe each web page on 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 Router. For a basic wireless network
setup, most users only have to use the following screens of the Utility:
•BasicSetup.OntheBasic Setup screen, enter the Internet connection settings provided by your ISP. If you do
not have this information, you can call your ISP to request the settings. Once you have the setup information
for your specific type of Internet connection, then you can configure the Router.
• Management. Click the Administration tab and then the Management tab. The Router’s default password
is admin. To secure the Router, change the Password from its default.
• Wireless. On the Basic Wireless Settings screen, set the basic configuration for your wireless network.
There are seven main tabs: Setup, Wireless, Security, Voice, Applications & Gaming, Administration, and Status.
Additional tabs will be available after you click one of the main tabs.

Wireless-G Broadband Router with 2 Phone Ports
12 Chapter 5: Configuring the Router
Overview
Setup
• Basic Setup. Enter the Internet connection and network settings on this screen.
• DDNS. Enable the Router’s Dynamic Domain Name System (DDNS) feature on this screen.
• MAC Address Clone. If you need to clone a MAC address onto the Router, use this screen.
• Advanced Routing. On this screen, you can alter Network Address Translation (NAT), Dynamic Routing, and
Static Routing configurations.
Wireless
• Basic Wireless Settings. Enter the basic settings for your wireless network on this screen.
• Wireless Security. Enable and configure the security settings for your wireless network.
• Wireless Network Access. To permit or deny wireless network access for specific devices, set up MAC
address filtering.
• Advanced Wireless. Advanced users can alter data tranmission settings on this screen.
Security
• Filter. To block specific users from Internet access, you can set up IP address, port, and MAC address
filtering.
• VPN Passthrough. To enable or disable IPSec, PPPoE, and/or PPTP Passthrough, use this screen.