Linksys RT41-BU Manuale utente

A Division of Cisco Systems, Inc.

Model No.

Wired Broadband Router

RT41-BU

User Guide

Wired Broadband Router

Specifications are subject to change without notice. Linksys is a registered trademark or trademark of Cisco

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 Wired Broadband Router has been designed to make understanding networking with the 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.

This exclamation point means there is a caution or

warning and is something that could damage your

property or the Router.

word: definition.

This checkmark means there is a note of interest and

is something you should pay special attention to while

using the Router.

This question mark provides you with a reminder about

something you might need to do while using the Router.

Figure 0-1: Sample Figure Description

RT41-BU-UG-50929NC 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.

Wired Broadband Router

TableofContents

Chapter 1: Introduction 1

Welcome 1

What’s in this Guide? 2

Chapter 2: Networking Basics 4

An Introduction to Local Area Networks 4

The Use of IP Addresses 4

Chapter 3: Getting to Know the Router 6

The Back Panel 6

The Front Panel 7

Chapter 4: Connecting the Router 8

Overview 8

Connecting the Router to Your Broadband Modem 8

Chapter 5: Configuring the Router 9

Overview 9

How to Access the Web-based Utility 11

The Setup Tab - Basic Setup 11

The Setup Tab - DDNS 16

The Setup Tab - MAC Address Clone 17

The Security Tab - Firewall 18

The Security Tab - VPN 19

The Access Restrictions Tab - Internet Access 20

The Applications & Gaming Tab - Port Range Forward 22

The Applications & Gaming Tab - Port Trigger 23

The Applications & Gaming Tab - UPnP Forward 24

The Applications & Gaming Tab - DMZ 26

The Administration Tab - Management 27

The Administration Tab - Log 29

The Administration Tab - Diagnostics 30

The Administration Tab - Factory Defaults 31

The Administration Tab - Firmware Upgrade 32

The Administration Tab - Backup and Restore 33

The Administration Tab - Reboot 33

Wired Broadband Router

The Status Tab - Router 34

The Status Tab - Local Network 35

Appendix A: Troubleshooting 36

Common Problems and Solutions 36

Frequently Asked Questions 45

Appendix B: Finding the MAC Address and IP Address for Your Ethernet Adapter 49

Windows 98 or Me Instructions 49

Windows 2000 or XP Instructions 49

For the Router’s Web-based Utility 50

Appendix C: Windows Help 51

Appendix D: Glossary 52

Appendix E: Specifications 57

Appendix F: Warranty Information 58

Appendix G: Regulatory Information 59

Appendix H: Contact Information 65

Wired Broadband Router

ListofFigures

Figure 3-1: Back Panel 6

Figure 3-2: Front Panel 7

Figure 4-1: Connect the Broadband Modem 8

Figure 4-2: Connect a PC 8

Figure 4-3: Connect the Power 8

Figure 5-1: Router’s IP Address 11

Figure 5-2: Router Login 11

Figure 5-3: Setup Tab - Basic Setup(Automatic Configuration - DHCP) 11

Figure 5-4: Static IP 12

Figure 5-5: PPPoE 12

Figure 5-6: PPTP 13

Figure 5-7: Setup Tab - DDNS (DynDNS.org) 16

Figure 5-8: Setup Tab - DDNS (TZO.com) 16

Figure 5-9: Setup Tab - MAC Address Clone 17

Figure 5-10: Security Tab - Firewall 18

Figure 5-11: Security Tab - VPN Passthrough 19

Figure 5-12: Access Restrictions Tab - Internet Access 20

Figure 5-13: Internet Policy Summary 20

Figure 5-14: List of PCs 21

Figure 5-15: Applications & Gaming Tab - Port Range Forward 22

Figure 5-16: Applications & Gaming Tab - Port Trigger 23

Figure 5-17: Applications & Gaming Tab - UPnP Forward 24

Figure 5-18: Applications & Gaming Tab - DMZ 26

Figure 5-19: Administration Tab - Management 27

Figure 5-20: Administration Tab - Log 29

Figure 5-21: Incoming Log Table 29

Figure 5-22: Outgoing Log Table 29

Figure 5-23: Administration Tab - Diagnostics 30

Wired Broadband Router

Figure 5-24: Ping Test 30

Figure 5-25: Traceroute Test 30

Figure 5-26: Administration Tab - Factory Defaults 31

Figure 5-27: Administration Tab - Firmware Upgrade 32

Figure 5-28: Administration Tab - Backup and Restore 33

Figure 5-29: Administration Tab - Reboot 33

Figure 5-30: Status Tab - Router 34

Figure 5-31: Status Tab - Local Network 35

Figure 5-32: DHCP Clients Table 35

Figure B-1: IP Configuration Screen 49

Figure B-2: MAC Address/Adapter Address 49

Figure B-3: MAC Address/Physical Address 50

Figure B-4: Access Restrictions - MAC and IP Addresses 50

Figure B-5: MAC Address Clone 50

Chapter 1: Introduction

Welcome

Wired Broadband Router

Chapter1:Introduction

Welcome

Thank you for choosing the Wired Broadband Router. This Router will allow your computers to share a high-speed

Internet connection as well as resources, including files and printers.

How does the Router do all of this? By connecting your computers and peripherals to the Router and connecting

the Router to your cable or DSL modem, the Router can direct and control communications for your network. The

Router’s built-in 4-port switch lets you attach four local PCs, or add more hubs and switches as your network

grows. Auto MDI/MDI-X cross-over detection means you don't have to worry about the cable type.

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.

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. 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”.

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 this User Guide to help you. These instructions should be all you need to get the most out of

the Router.

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.

Chapter 1: Introduction

What’s in this Guide?

Wired Broadband Router

What’s in this Guide?

This user 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 and PCs.

• 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.

You also have other chapter available for reference:

• Chapter 1: Introduction

This chapter describes the Router’s applications and this User Guide.

• Chapter 2: Networking Basics

This chapter briefly explains how a network functions.

• 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: 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 C: Windows Help

This appendix describes how you can use Windows Help for instructions about networking, such as installing

the TCP/IP protocol.

• Appendix D: Glossary

This appendix gives a brief glossary of terms frequently used in networking.

• Appendix E: Specifications

This appendix provides the technical specifications for the Router.

• Appendix F: Warranty Information

This appendix supplies the warranty information for the Router.

Chapter 1: Introduction

What’s in this Guide?

Wired Broadband Router

• Appendix G: Regulatory Information

This appendix supplies the regulatory information regarding the Router.

• Appendix H: Contact Information

This appendix provides contact information for a variety of Linksys resources, including Technical Support.

Chapter 2: Networking Basics

An Introduction to Local Area Networks

Wired Broadband Router

Chapter2:NetworkingBasics

An Introduction to Local Area Networks

Simply put, 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.

dynamic ip address: a temporary IP

address assigned by a DHCP server.

static ip address: a fixed address

assigned to a computer or device that

is connected to a network.

nat (network address translation): NAT

technology translates IP addresses of a

local area network to a different IP

address for the Internet.

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.

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