LINKSYS RV042 User Manual

A Division of Cisco Systems, Inc.

®

Model No.

WIRED

RV042

10/100 4-Port

VPN Router

User Guide

10/100 4-Port VPN Router

Copyright and Trademarks

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.

How to Use this Guide

This User Guide has been designed to make understanding networking with the Router easier than ever. Look for
the following items when reading this Guide:

This checkmark means there is a Note of interest and
is something you should pay special attention to while
using the Router.

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.

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”.

RV042-UG-40514 BW

10/100 4-Port VPN Router

Table of Contents

Chapter 1: Introduction 1

Welcome 1
What’s in this Guide? 2

Chapter 2: Networking Basics 4

An Introduction to LANs 4
The Use of IP Addresses 4
Why do I need a VPN? 5
What is a VPN? 6

Chapter 3: Getting to Know the Router 8

The Front Panel 8
The Back and Side Panels 9

Chapter 4: Connecting the Router 11

Overview 11
Connection Instructions 12

Chapter 5: Configuring the PCs 14

Overview 14
Configuring Windows 98 and Millennium PCs 14
Configuring Windows 2000 PCs 15
Configuring Windows XP PCs 15

Chapter 6: Set Up and Configure the Router 17

Overview 17
How to Access the Web-based Utility 20
System Summary Tab 20
Setup Tab - Network 23
Setup Tab - Password 25
Setup Tab - Time 25
Setup Tab - DMZ Host 26
Setup Tab - Forwarding 26
Setup Tab - UPnP Page 27
Setup Tab - One-to-One NAT 27
Setup Tab - MAC Clone 28
Setup Tab - DDNS 29

10/100 4-Port VPN Router

Setup Tab - Advanced Routing 29
DHCP Tab - Setup 31
DHCP Tab - Status 31
System Management Tab - Dual-WAN 32
System Management Tab - SNMP 32
System Management Tab - Diagnostic 33
System Management Tab - Factory Default 34
System Management Tab - Firmware Upgrade 35
System Management Tab - Restart 35
System Management Tab - Setting Backup 35
Firewall Tab - General 36
Firewall Tab - Access Rules 37
Firewall Tab - Content Filter 38
VPN Tab - Summary 39
VPN Tab - Gateway to Gateway 41
VPN Tab - Client to Gateway 47
VPN Tab - VPN Pass Through 54
Log Tab - System Log 54
Log Tab - System Statistics 56
Wizard Tab 56
Support Tab 64
Logout Tab 64

Appendix A: Troubleshooting 65

Common Problems and Solutions 65
Frequently Asked Questions 75

Appendix B: Upgrading Firmware 79
Appendix C: Finding the MAC Address and IP Address for

Your Ethernet Adapter 80

Windows 98 or Me Instructions 80
Windows 2000 or XP Instructions 80
For the Router’s Web-based Utility 81

Appendix D: Physical Setup of the Router 82

Setting up the Router 82

Appendix E: Windows Help 83
Appendix F: Glossary 84

10/100 4-Port VPN Router

Appendix G: Specifications 91
Appendix H: Warranty Information 92
Appendix I: Regulatory Information 93
Appendix J: Contact Information 94

10/100 4-Port VPN Router

List of Figures

Figure 2-1: VPN Router-to-VPN Router VPN 7
Figure 2-2: Computer-to-VPN Router VPN 7
Figure 3-1: Front Panel 8
Figure 3-2: Back Panel 9
Figure 3-3: Right Side Panel 10
Figure 3-4: Left Side Panel 10
Figure 4-1: Example of a Typical Network 11
Figure 4-2: Connect a PC 12
Figure 4-3: Connect the Internet 12
Figure 4-4: Connect the DMZ/Internet 12
Figure 4-5: Connect the Power 13
Figure 5-1: TCP/IP for Windows 98 and Me 14
Figure 5-2: Obtain an IP address automatically for Windows 98 and Me 14
Figure 5-3: Internet Protocol (TCP/IP) for Windows 2000 15
Figure 5-4: Obtain an IP address automatically for Windows 2000 15
Figure 5-5: Internet Protocol (TCP/IP) for Windows XP 16
Figure 5-6: Obtain an IP address automatically for Windows XP 16
Figure 6-1: Router’s IP Address 20
Figure 6-2: Password 20
Figure 6-3: System Summary 20
Figure 6-4: Site Map 21
Figure 6-5: Setup Tab 23
Figure 6-6: Obtain an IP Automatically 24
Figure 6-7: Static IP 24
Figure 6-8: PPPoE 24
Figure 6-9: PPTP 24
Figure 6-10: Password 25
Figure 6-11: Time 25

10/100 4-Port VPN Router

Figure 6-12: DMZ Host 26
Figure 6-13: Forwarding 26
Figure 6-14: Service Management 26
Figure 6-15: UPnP 27
Figure 6-16: One-to-One NAT 27
Figure 6-17: MAC Clone 28
Figure 6-18: DDNS 29
Figure 6-19: Advanced Routing 29
Figure 6-20: DHCP Setup 31
Figure 6-21: DHCP Status 31
Figure 6-22: Dual-WAN Smart Link Backup 32
Figure 6-23: Dual WAN Load Balance 32
Figure 6-24: SNMP 32
Figure 6-25: DNS Name Lookup 33
Figure 6-26: Ping 33
Figure 6-27: Factory Default 34
Figure 6-28: Are You Sure 34
Figure 6-29: System is Rebooting 34
Figure 6-30: Firmware Upgrade 35
Figure 6-31: Restart 35
Figure 6-32: Setting Backup 35
Figure 6-33: Save File 36
Figure 6-34: Firewall 36
Figure 6-35: Access Rules 37
Figure 6-36: Add a New Access Rule 37
Figure 6-37: Service Management 37
Figure 6-38: Settings are Successful 38
Figure 6-39: Content Filter 38
Figure 6-40: VPN Summary 39
Figure 6-41: Mode Choose 39

10/100 4-Port VPN Router

Figure 6-42: Gateway to Gateway 40
Figure 6-43: Client to Gateway 40
Figure 6-44: Gateway to Gateway 41
Figure 6-45: Client to Gateway 47
Figure 6-46: Advanced 53
Figure 6-47: VPN Pass Through 54
Figure 6-48: System Log 54
Figure 6-49: System Statistics 56
Figure 6-50: Wizard 56
Figure 6-51: Dual WAN or DMZ 57
Figure 6-52: Host and Domain Name 57
Figure 6-53: WAN Connection Type 57
Figure 6-54: Obtain an IP Automatically 58
Figure 6-55: Static IP 58
Figure 6-56: PPPoE 58
Figure 6-57: WAN Connection Type WAN2 59
Figure 6-58: Obtain an IP WAN2 59
Figure 6-59: Static IP WAN2 60
Figure 6-60: PPPoE WAN2 60
Figure 6-61: Save Settings 60
Figure 6-62: Access Rules Policy 61
Figure 6-63: Select the Action 61
Figure 6-64: Select the Service 61
Figure 6-65: Select the Log 62
Figure 6-66: Select the Source 62
Figure 6-67: Select the Destination 62
Figure 6-68: When it Works 63
Figure 6-69: Save Settings 63
Figure 6-70: Settings are Successful 63
Figure 6-71: Support 64

10/100 4-Port VPN Router

Figure B-1: Upgrade Firmware 79
Figure C-1: IP Configuration Screen 80
Figure C-2: MAC Address/Adapter Address 80
Figure C-3: MAC Address/Physical Address 81
Figure C-4: MAC Address Clone 81
Figure D-1: Wall-Mounting the Router 82

10/100 4-Port VPN Router

Chapter 1: Introduction

Welcome

Thank you for choosing the 10/100 4-Port VPN Router. The Linksys 10/100 4-Port VPN Router is an advanced
Internet-sharing network solution for your small business needs. Like any router, it lets multiple computers in
your office share an Internet connection. But the unique dual Internet ports on the 10/100 4-Port VPN Router let
you connect a second Internet line as a backup to insure that you're never disconnected. Or, use both Internet
ports at the same time, and let the router balance your office's requirements between them for maximum
bandwidth efficiency.

The 10/100 4-Port VPN Router also features a built-in 4-Port full-duplex 10/100 Ethernet switch to connect four
PCs directly, or you can connect more hubs and switches to create as big a network as you need.

The Virtual Private Network (VPN) capability creates encrypted “tunnels” through the Internet, allowing up to 30
remote office or traveling users to securely connect into your office network from off-site. Users connecting
through a VPN tunnel are attached to your company's network — with secure access to files, e-mail, and your
intranet — just as if they were in the building. You can also use the VPN capability to allow users on your small
office network to securely connect out to a corporate network.

The 10/100 4-Port VPN Router can serve as a DHCP Server, and has a powerful SPI firewall to protect your PCs
against intruders and most known Internet attacks. It can be configured to filter internal users' access to the
Internet, and has IP address filtering so you can specify exactly who has access to your network. Configuration is
a snap with the web browser-based configuration utility.

Ethernet: a network protocol that specifies
how data is placed on and retrieved from a
common transmission medium.

This user guide will give you all the information you need to connect, set up, and configure your Router.

Chapter 1: Introduction
Welcome

1

10/100 4-Port VPN Router

What’s in this Guide?

This user guide covers the steps for setting up and using the 10/100 4-Port VPN Router.

• Chapter 1: Introduction
This chapter describes the 10/100 4-Port VPN Router applications and this User Guide.

• Chapter 2: Networking Basics
This chapter describes the basics of networking.

• Chapter 3: Getting to Know the 10/100 4-Port VPN Router
This chapter describes the physical features of the Router.

• Chapter 4: Connecting the 10/100 4-Port VPN Router
This chapter instructs you on how to connect the Router to your network.

• Chapter 5: Configuring the PCs
This chapter explains how to configure the PCs for your network.

• Chapter 6: Set Up and Configure the Router
This chapter explains how to use the Web-Based Utility to set up the Router and configure its settings.

• Appendix A: Troubleshooting
This appendix describes some problems and solutions, as well as frequently asked questions, regarding
installation and use of the 10/100 4-Port VPN Router.

• Appendix B: Upgrading Firmware
This appendix instructs you on how to upgrade the firmware on your Router if you should need to do so.

• Appendix C: Finding the MAC Address and IP Address for your Ethernet Adapter.
This appendix describes how to find the MAC address for your computer’s Ethernet adapter so you can use
the MAC address cloning feature of the Router.

• Appendix D: Physical Setup of the Router
This appendix describes the physical setup of the Router..

• Appendix F: Windows Help
This appendix describes how you can use Windows Help for instructions about networking, such as installing
the TCP/IP protocol.

• Appendix G: Glossary
This appendix gives a brief glossary of terms frequently used in networking.

Chapter 1: Introduction
What’s in this Guide?

2

10/100 4-Port VPN Router

• Appendix H: Specifications
This appendix provides the technical specifications for the Router.

• Appendix I: Warranty Information
This appendix supplies the warranty information for the Router.

• Appendix J: Regulatory Information
This appendix supplies the regulatory information regarding the Router.

• Appendix K: Contact Information
This appendix provides contact information for a variety of Linksys resources, including Technical Support.

Chapter 1: Introduction
What’s in this Guide?

3

10/100 4-Port VPN Router

Chapter 2: Networking Basics

An Introduction to LANs

A Router is a network device that connects two networks together.

The Router connects your local area network (LAN), or the group of PCs in your home or office, to the Internet. The
Router processes and regulates the data that travels between these two networks.

The Router’s Network Address Translation (NAT) technology protects your network of PCs so users on the Internet
cannot “see” your PCs. This is how your LAN remains private. The Router protects your network by inspecting the
first packet coming in through the Internet port before delivery to the final destination on one of the Ethernet
ports. The Router 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 PC on the LAN side.

The Use of IP Addresses

IP stands for Internet Protocol. Every device in an IP-based network, including PCs, print servers, and routers,
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 IP addresses to your network devices.

A static IP address is a fixed IP address that you assign manually to a PC 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 are commonly used with network
devices such as server PCs or print servers.

If you use the Router to share your cable or 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
Router. You can get the information from your ISP.

A dynamic IP address is automatically assigned to a device on the network. These IP addresses are called
dynamic because they are only temporarily assigned to the PC or other device. After a certain time period, they
expire and may change. If a PC logs onto the network (or the Internet) and its dynamic IP address has expired, the
DHCP server will assign it a new dynamic IP address.

NAT (Network Address Translation):
NAT technology translates IP
addresses of a local area network to a
different IP address for the Internet.

Static IP address: a fixed address
assigned to a computer or device that
is connected to a network.

Dynamic IP address: a temporary IP
address assigned by a DHCP server.

DHCP (Dynamic Host Configuration
Protocol): a protocol that lets one

device on a local network, known as a
DHCP server, assign temporary IP
addresses to the other network
devices, typically computers.

Chapter 2: Networking Basics
An Introduction to LANs

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10/100 4-Port VPN Router

A DHCP server can either be a designated PC on the network or another network device, such as the Router. By
default, the Router’s Internet Connection Type is Obtain an IP automatically (DHCP).

The PC 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.

For DSL users, many ISPs may require you to log on with a user name and password to gain access to the
Internet. This is a dedicated, high-speed connection type called Point to Point Protocol over Ethernet (PPPoE).
PPPoE is similar to a dial-up connection, but PPPoE does not dial a phone number when establishing a
connection. It also will provide the Router with a dynamic IP address to establish a connection to the Internet.

By default, a DHCP server (on the LAN side) is enabled on the Router. 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 Router,
see the Basic Setup section in “Chapter 6: Set up and Configure the Router.”

Why do I need a VPN?

Computer networking provides a flexibility not available when using an archaic, paper-based system. With this
flexibility, however, comes an increased risk in security. This is why firewalls were first introduced. Firewalls
help to protect data inside of a local network. But what do you do once information is sent outside of your local
network, when e-mails are sent to their destination, or when you have to connect to your company's network
when you are out on the road? How is your data protected?

That is when a VPN can help. VPNs are called Virtual Private Networks because they 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 e-mail 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.

Chapter 2: Networking Basics
Why do I need a VPN?

LAN: the computers and networking products that
make up your local network

NOTE: Since the Router 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 Router uses NAT technology, the only IP
address that can be seen from the Internet for your
network is the Router’s Internet IP address. However,
even this Internet IP address can be blocked, so that the
Router and network seem invisible to the Internet.

5

10/100 4-Port VPN Router

A hacker can use this information to spoof (or fake) a MAC address allowed on the network. With this spoofed
MAC address, the hacker can also intercept information meant for another user.

2) Data Sniffing

Data “sniffing” is a method used by hackers to obtain network data as it travels through unsecured networks,
such as the Internet. Tools for just this kind of activity, such as protocol analyzers and network diagnostic tools,
are often built into operating systems and allow the data to be viewed in clear text.

3) Man in the middle attacks

Once the hacker has either sniffed or spoofed enough information, he can 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.

What is a VPN?

A VPN, or Virtual Private Network, is a connection between two endpoints - a VPN Router, 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 PCs 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,
telecommuters, and/or professionals on the road (travelers can connect to a VPN Router using any computer with
VPN client software that supports IPSec, such as SSH Sentinel.)

There are two basic ways to create a VPN connection:

Chapter 2: Networking Basics
What is a VPN?

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10/100 4-Port VPN Router

•VPN Router to VPN Router

•Computer (using VPN client software that supports IPSec) to VPN Router

The VPN Router 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 Router to create a VPN
tunnel using IPSec). Other versions of Microsoft operating systems require additional, third-party VPN client
software applications that support IPSec to be installed.

VPN Router to VPN Router

An example of a VPN Router-to-VPN Router VPN would be as follows. (See Figure 2-1.) At home, a telecommuter
uses his VPN Router for his always-on Internet connection. His router is configured with his office's VPN settings.
When he connects to his office's router, the two routers 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.

Computer (using VPN client software that supports IPSec) to VPN Router

The following is an example of a computer-to-VPN Router 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 Router
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.

Figure 2-1: VPN Router-to-VPN Router VPN

For additional information and instructions about creating your own VPN, please visit Linksys’s website at
www.linksys.com.

Chapter 2: Networking Basics
What is a VPN?

Figure 2-2: Computer-to-VPN Router VPN

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10/100 4-Port VPN Router

Chapter 3: Getting to Know the Router

The Front Panel

The Router’s LEDs are located on the front panel of the Router.

Figure 3-1: Front Panel

LEDs

System Green. The System LED lights up when the Router is powered on. If the LED is flashing,

the Router is running a diagnostic test.

Diag Orange. The Diag LED lights up when the system is not ready. The LED goes off when

the system is ready.

Internet Green. The Internet LED lights up when the Router is connected to your cable or DSL

modem.

DMZ/Internet Green. The DMZ/Internet LED lights up when the Router is connected to your cable or

DSL modem when used as an Internet port, and it lights up when the Router is
connected to the hub, switch, or public server when used as a DMZ port.

DMZ Mode Green. The DMZ Mode LED lights up when the Router is using DMZ mode.

1-4 (LAN) Green. The LAN LED serves two purposes. If the LED is continuously lit, the Router is

connected to a device through the corresponding port (1, 2, 3, or 4). If the LED is
flashing, the Router is actively sending or receiving data over that port.

Chapter 3: Getting to Know the Router
The Front Panel

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10/100 4-Port VPN Router

The Back and Side Panels

The Router’s ports and Reset button are located on the back panel of the Router.

LAN

WAN1

WAN2

Figure 3-2: Back Panel

Reset Button

Reset Button The Reset button can be used in one of two ways:

If the Router is having problems connecting to the Internet, press the Reset button for
just a second with a paper clip or a pencil tip. This is similar to pressing the Reset
button on your PC to reboot it.

If you are experiencing extreme problems with the Router and have tried all other
troubleshooting measures, press and hold in the Reset button for 30 seconds. This will
restore the factory defaults and clear all of the Router’s settings, such as port
forwarding or a new password.

Ports

1-4 (LAN) These four LAN (Ethernet) ports connect to network devices, such as PCs, print

servers, or additional switches.

Internet (WAN1) The Internet port connects to a cable or DSL modem.

DMZ/Internet (WAN2) The DMZ/Internet port can be used in two different ways: a second Internet port, or

DMZ port. When used as an additional Internet port, it connects to a cable or DSL
modem. When used as a DMZ port, it connects to a hub, switch, or public server.

Chapter 3: Getting to Know the Router
The Back and Side Panels

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10/100 4-Port VPN Router

The power port is located on the right side panel of the Router.

Figure 3-3: Right Side Panel

Power The Power port is where you will connect the included AC power cable.

‘

The security slot is located on the left side panel.

Figure 3-4: Left Side Panel

Security Slot The security slot is where you can attach a lock so the Router will be protected from

theft.

Proceed to “Chapter 4: Connecting the Router.”

Chapter 3: Getting to Know the Router
The Back and Side Panels

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10/100 4-Port VPN Router

Chapter 4: Connecting the Router

Overview

To set up your network, you will do the following:

• Connect the Router to one of your PCs according to the instructions in this chapter.

• If necessary, configure your PCs to obtain an IP address automatically from the Router, according to “Chapter
5: Configuring the PCs.” (By default, Windows 98, 2000, Millennium, and XP computers are set to obtain an IP
address automatically, so unless you have changed the default setting, then you will not need to configure
your PCs.)

• Set up and configure the Router with the setting(s) provided by your Internet Service Provider (ISP) according
to “Chapter 6: Set up and Configure the Router.”

The installation technician from your ISP should have left the setup information with you after installing your
broadband connection. If not, you can call your ISP to request the information. Once you have the setup
information for your specific type of Internet connection, then you can begin installation and setup of the Router.

Chapter 4: Connecting the Router
Overview

Notebook with

Ethernet Adapter

Cable or DSL

Modem

10/100 4-Port

VPN Router

PC with Ethernet

Adapter

Figure 4-1: Example of a Typical Network

11

10/100 4-Port VPN Router

Connection Instructions

1. Before you begin, make sure that all of your hardware is powered off, including the Router, PCs, hubs,
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 (see
Figure 4-2). Connect the other end to an Ethernet port on a network device, e.g., a PC, print server, hub, or
switch.

Repeat this step to connect more PCs or other network devices to the Router.

3. Connect your cable or DSL modem’s Ethernet cable to the Router’s Internet port. If using the DMZ/Internet
port, connect a second cable to it, and the other end to the network device, e.g., modem or public server.

4. Power on the cable or DSL modem and the other network device if using one.

Figure 4-2: Connect a PC

Figure 4-3: Connect the Internet

Chapter 4: Connecting the Router
Connection Instructions

Figure 4-4: Connect the DMZ/Internet

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10/100 4-Port VPN Router

5. Connect the included AC power cable to the Router’s Power port on the side of the Router, as shown in Figure
4-5, and then plug the power adapter into an electrical outlet.

The System LED on the front panel will light up as soon as the power adapter is connected properly.

If you need to configure your PCs, proceed to “Chapter 5: Configuring the PCs.” Otherwise, proceed to

“Chapter 6: Set Up and Configure the Router.”

Figure 4-5: Connect the Power

Chapter 4: Connecting the Router
Connection Instructions

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10/100 4-Port VPN Router

Chapter 5: Configuring the PCs

Overview

The instructions in this chapter will help you configure each of your computers so they will be able to
communicate with the Router. Each PC must be set to obtain an IP address (or TCP/IP) address automatically
(called DHCP). Computers use IP addresses to communicate with each other across a network or the Internet.

Note: These instructions apply only to Windows 98, Millennium, 2000, or XP computers. By default,
Windows 98, 2000, Millennium, and XP have TCP/IP installed and are set to obtain an IP address
automatically. If you have not made any changes to your PC’s default network settings, then proceed
to “Chapter 6: Set Up and Configure the Router.”

Find out which operating system your computer is running, such as Windows 98, Millennium, 2000, or XP. If
you’re not sure, you can find out by clicking the Start button. On the left side of the taskbar, it will say which
operating system your computer is using.

You may need to do this for each computer you are connecting to the Router.

The next few pages tell you, step by step, how to configure your network settings based on the type of Windows
operating system you are using. Make sure that an Ethernet card or adapter has been successfully installed in
each PC you will configure. Once you’ve configured your computers, proceed to “Chapter 6: Set Up and Configure
the Router.”

Configuring Windows 98 and Millennium PCs

1. Click the Start button. Click Settings and then Control Panel. From there, double-click the Network icon.

2. On the Configuration tab, select the TCP/IP line for the applicable Ethernet adapter, as shown in Figure 5-1.
Do not choose a TCP/IP entry whose name mentions Dial-Up Adapter, PPPoE, VPN, or AOL. If the word TCP/IP
appears by itself, select that line. (If there is no TCP/IP line listed, refer to Windows Help or your Ethernet
adapter’s documentation to install TCP/IP now.) Click the Properties button.

3. Click the IP Address tab and select Obtain an IP address automatically, as shown in Figure 5-2.

4. Now click the Gateway tab to ensure that the Installed Gateway field is left blank. Click the OK button.

Chapter 5: Configuring the PCs
Overview

Figure 5-1: TCP/IP for Windows 98

and Me

Figure 5-2: Obtain an IP address

automatically for Windows 98

and Me

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10/100 4-Port VPN Router

5. Click the OK button again. Windows may ask you for the original Windows installation disk or additional files.
Supply them by pointing to the correct file location, e.g., D:\win98, D:\win9x, c:\windows\options\cabs, etc. (if
“D” is the letter of your CD-ROM drive).

6. Windows may ask you to restart your PC. Click the Yes button. If Windows does not ask you to restart, restart
your computer anyway.

Go to “Chapter 6: Set Up and Configure the Router.”

Configuring Windows 2000 PCs

1. Click the Start button. Click Settings and then Control Panel. From there, double-click the Network and
Dial-up Connections icon.

2. Select the Local Area Connection icon for the applicable Ethernet adapter (usually it is the first Local Area
Connection listed). Double-click the Local Area Connection. Click the Properties button.

3. Select Internet Protocol (TCP/IP), and click the Properties button. See Figure 5-3.

4. Select Obtain an IP address automatically (see Figure 5-4). Once the new windows appears, click the OK
button. Click the OK button again to complete the PC configuration.

5. Restart your computer.

Go to “Chapter 6: Set Up and Configure the Router.”

Configuring Windows XP PCs

The following instructions assume you are running Windows XP with the default interface. If you are using the
Classic interface (where the icons and menus look like previous Windows versions), follow the instructions for
Windows 2000.

1. Click the Start button. Click Settings and then Control Panel. Click the Network and Internet Connections
icon and then the Network Connections icon.

2. Select the Local Area Connection icon for the applicable Ethernet adapter (usually it is the first Local Area
Connection listed). Double-click the Local Area Connection. Click the Properties button.

Figure 5-3: Internet Protocol

(TCP/IP) for Windows 2000

Figure 5-4: Obtain an IP address

automatically for Windows 2000

Chapter 5: Configuring the PCs
Configuring Windows 2000 PCs

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10/100 4-Port VPN Router

3. Select Internet Protocol (TCP/IP), and click the Properties button. See Figure 5-5.

4. Select Obtain an IP address automatically (see Figure 5-6). Once the new window appears, click the OK
button. Click the OK button again (or the Close button if any settings were changed) to complete the PC
configuration.

5. Restart your computer.

Go to “Chapter 6: Set Up and Configure the Router.”

Figure 5-5: Internet Protocol

(TCP/IP) for Windows XP

Chapter 5: Configuring the PCs
Configuring Windows XP PCs

Figure 5-6: Obtain an IP address

automatically for Windows XP

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10/100 4-Port VPN Router

Chapter 6: Set Up and Configure the Router

Overview

For your convenience, use the Router’s Web-based Utility to set it up and configure it. This chapter will explain all
of the functions in this Utility.

There are eleven main tabs in the Utility: System Summary, Setup, DHCP, System Management, Firewall, VPN,
Log, Wizard, Support, and Logout. Additional tabs will be available after you click one of the main tabs. The tabs
are described below:

System Summary Tab

The System Summary Tab displays the router’s current status and settings. This information is read only. If you
click the button with underline, it will hyperlink to related setup pages.

Setup Tab

• Network. Enter the Internet connection and network settings on this screen.

• Password. You can change the Router’s password on this screen. it is strongly recommended that you change
the Router's password from the default.

• Time. Change the time on this screen.

• DMZ Host. The DMZ (Demilitarized Zone) Host feature allows one local user to be exposed to the Internet to
use a special-purpose service such as Internet gaming or video conferencing.

• Forwarding. Port forwarding can be used to set up public services on your network. You may use this function
to establish a Web server or FTP server via an IP Gateway.

• UPnP. UPnP forwarding can be used to set up public services on your network.

• One-to-One NAT. One-to-One NAT creates a relationship which maps valid external addresses to internal
addresses hidden by NAT.

• MAC Clone. Some ISPs require that you register a MAC address. This feature “clones” your network adapter's
MAC address onto the Router, and prevents you from having to call your ISP to change the registered MAC
address to the Router's MAC address.

Chapter 6: Set Up and Configure the Router
Overview

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10/100 4-Port VPN Router

• DDNS. DDNS (Dynamic DNS) service allows you to assign a fixed domain name to a dynamic WAN IP address.
This allows you to host your own Web, FTP or other type of TCP/IP server in your LAN.

• Advanced Routing. The Router's dynamic routing feature can be used to automatically adjust to physical
changes in the network's layout.

DHCP Tab

• Setup. You can enable/disable the DHCP server, set up client lease time, DHCP IP Range, and the WINS Server
IP address.

• Status. A Status page is available to review DHCP Server Status.

System Management Tab

• Dual WAN. There are two functions provided for users – Smart Link Backup and Load Balance.

• SNMP. SNMP, or Simple Network Management Protocol, is a network protocol that provides network
administrators with the ability to monitor the status of the Router and receive notification of any critical
events as they occur on the network.

• Diagnostic. The Router has two built-in tools that will help with troubleshooting network problems.

• Factory Default. The “Factory Default” button can be used to clear all of your configuration information and
restore the Router to its factory default settings. Only use this feature if you wish to discard all other
configuration preferences.

• Firmware Upgrade. Users can use the following function to upgrade the Router’s firmware to the newest
version.

• Restart. The recommended method of restarting your Router is to use this “Restart” tool. Restarting with this
button will send out your log file before the box is reset.

• Setting Backup. This tab allows you to make a backup file of your Preferences file for the Router.

Chapter 6: Set Up and Configure the Router
Overview

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10/100 4-Port VPN Router

Firewall Tab

• General. From the Firewall Tab, you can configure the Router to deny or allow specific internal users from
accessing the Internet.

• Access Rules. Network Access Rules evaluate the network traffic's Source IP address, Destination IP address,
and IP protocol type to decide if the IP traffic is allowed to pass through the firewall.

• Content Filter. This tab allows you to filter web access by site and time.

VPN Tab

• Summary. The VPN Summary displays the Summary, Tunnel Status and GroupVPN Status.

• Gateway to Gateway. By setting this page, users can add a new tunnel between two VPN devices.

• Client to Gateway. By setting this page, you can create a new tunnel between a Local VPN device and a
mobile user.

• VPN Pass Through. This tab allows you to disable IPSec Pass Through, PPTP Pass Through, and L2TP Pass
Through.

Log Tab

• System Log. The System Log displays Syslog, E-mail and Log Settings.

• System Statistics. This tab displays the system statistics.

Wizard Tab

• Wizard. Use this tab to access two Setup Wizards, the Basic Setup Wizard and Access Rule Setup Wizard.

Support Tab

• Support. This tab supplies buttons to access the user guide and the Linksys website.

Logout Tab

• Logout. Clicking this tab exits you from the Utility.

Chapter 6: Set Up and Configure the Router
Overview

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10/100 4-Port VPN Router

How to Access the Web-based Utility

To access the Web-based Utility of the Router, launch Internet Explorer or Netscape Navigator, and enter the
Router’s default IP address, 192.168.1.1, in the Address field, as shown in Figure 6-1. Press the Enter key.

• A screen will appear asking you for your User name and Password, as shown in Figure 6-2. Enter admin in
the User name field, and enter admin in the Password field. Then click the OK button.

System Summary Tab

The first screen that appears is System Summary Tab. See Figure 6-3. This screen displays the router’s current
status and settings. This information is read only. If you click the button with underline, it will hyperlink to related
setup pages. On the right side of the screen and all other screens in the Utility will be a link to the Site Map, which
has links to all of the Utility’s tabs. Click the Site Map button to view the Site Map. See Figure 6-4. Then, click on
desired tab subject.

System Information

Serial Number: The serial number of the Router.

Firmware version: The current version number of the firmware installed on this unit.

CPU: The type of processor installed on the Router. It is Intel IXP425.

DRAM: The size of DRAM on the board.

Flash: The size of Flash on the board.

Figure 6-1: Router’s IP Address

Figure 6-2: Password

System Up Time: The length of time in Days, Hours, and Minutes that the Router is active and the current time are
displayed.

Configuration

If you need help to re-configure the router, click the Setup Wizard button. To view the figures for the wizard, see
the Wizard Tab section.

Chapter 6: Set Up and Configure the Router
How to Access the Web-based Utility

Figure 6-3: System Summary

20

10/100 4-Port VPN Router

Port Statistics

Users can click the port number from the port diagram to see the status of the selected port. If the port is
disabled, it will be red; if enabled, it will be black; if connected, it will be green. In the summary table, it will show
the setting of the port selected by users, such as Type, Link Status (up or down), Port Disable (on or off), Priority
(High or Normal), Speed Status (10Mbps or 100Mbps), Duplex Status (half or full), Auto negotiation (enable or
disable). In the statistics table, it will show the port receive/transmit packet count/packet byte count and Port
Packet Error Count of the selected port. The LAN ports can be configured from the LAN Setup page of the LAN
Management Tab.

Network Setting Status

LAN IP: It shows the current LAN IP Address of the Router, as seen by internal users on the network, and
hyperlinks to the LAN Setting section on the Network page of the Setup Tab.

WAN1 IP: It shows the current WAN1 IP Address of the Router, as seen by external users on the Internet and
hyperlinks to WAN Connection type section on the Network page of the Setup Tab. When users select Obtain an IP
automatically, it shows two buttons, Release and Renew. Users can click the Release button to release the IP that
users already have and click the Renew button to update the DHCP Lease Time or get a new IP. When users select
PPPoE or PPTP, it shows Connect / Disconnect.

WAN2/DMZ IP: It shows the current WAN2 IP Address of the Router, or DMZ IP when DMZ is selected, as seen by
external users on the Internet and hyperlinks to WAN Connection type on the Network page of the Setup Tab.

Mode: It shows the Working Mode (Gateway or Router) and hyperlinks to Dynamic Routing section on the
Advanced Routing page of the Setup Tab.

DNS: It shows all DNS Server Addresses and hyperlinks to WAN Connection Type on the Network page of the
Setup Tab.

DDNS: It shows the status (On/Off) and hyperlinks to DDNS page of the Setup Tab.

DMZ Host: It shows DMZ Private Address and hyperlinks to DMZ Host page of the Setup Tab. The default is
disabled.

Firewall Setting Status

SPI (Stateful Packet Inspection): It shows the status (On/Off) and hyperlinks to the General page of the Firewall
Tab.

DoS (Denial of Service): It shows the status (On/Off) and hyperlinks to the General page of the Firewall Tab.

Figure 6-4: Site Map

Chapter 6: Set Up and Configure the Router
System Summary Tab

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