Linksys BEFSX41 - Instant Broadband EtherFast Cable/DSL Firewall... Bedienungsanleitung

A Division of Cisco Systems, Inc.

Model No.

WIRED

with 4-Port Switch/VPN

Broadband Firewall Router

BEFSX41

User Guide

Endpoint

Broadband Firewall Router with 4-Port Switch/VPN Endpoint

Linksys is a registered trademark or trademark of Cisco Systems, Inc. and/or its affiliates in the U.S. and certain

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:

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 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

BEFSX41_V2-UG-40408ABW

Broadband Firewall Router with 4-Port Switch/VPN Endpoint

Table of Contents

Chapter 1: Introduction 1

Welcome 1

What’s in this Guide? 2

Chapter 2: Your Virtual Private Network (VPN) 4

Why do I need a VPN? 4

What is a Virtual Private Network? 5

Computer (using VPN client software that supports IPSec) to VPN Router 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: Using The Router’s Web-based Utility 11

Overview 11

Navigating the Utility 11

Accessing the Utility 13

The Setup Tab 13

The Security Tab 25

The Restrict Access Tab 31

The Applications & Gaming Tab 33

Port Triggering 34

UPnP Forwarding 35

DMZ 37

The Administration Tab 38

The Status Tab 42

Appendix A: Troubleshooting 44

Common Problems and Solutions 44

Frequently Asked Questions 53

Appendix B: Upgrading Firmware 57

Appendix C: Finding the MAC Address and IP Address

for Your Ethernet Adapter 58

Broadband Firewall Router with 4-Port Switch/VPN Endpoint

Windows 98 or Me Instructions 58

Windows 2000 or XP Instructions 58

For the Router’s Web-based Utility 59

Appendix D: Windows Help 60

Appendix E: Maximizing VPN Security 61

Appendix F: Configuring IPSec between a Windows 2000 or

XP Computer and the Gateway 63

Introduction 63

Environment 63

How to Establish a Secure IPSec Tunnel 64

Appendix G: SNMP Functions 74

Appendix H: Glossary 75

Appendix I: Specifications 79

Appendix J: Warranty Information 80

Appendix K: Regulatory Information 81

Appendix L: Contact Information 82

Broadband Firewall Router with 4-Port Switch/VPN Endpoint

List of Figures

Figure 2-1: VPN Router to VPN Router 6

Figure 2-2: Computer to VPN Router 6

Figure 3-1: Back Panel 7

Figure 3-2: Front Panel 8

Figure 4-1: Example of a Typical Network 9

Figure 4-2: Connect a PC 10

Figure 4-3: Connect the Internet 10

Figure 4-4: Connect the Power 10

Figure 5-1: The Router’s IP Address 13

Figure 5-2: Router Login 13

Figure 5-3: Setup Tab - Basic Setup 13

Figure 5-4: DHCP Connection Type 14

Figure 5-5: Static IP Connection Type 14

Figure 5-6: PPPoE Connection Type 15

Figure 5-7: RAS Connection Type 16

Figure 5-8: PPTP Connection Type 17

Figure 5-9: Heart Beat Signal Connection Type 18

Figure 5-10: L2TP Connection Type 19

Figure 5-11: Network Setup 20

Figure 5-12: Setup Tab - DynDNS.org 21

Figure 5-13: Setup Tab - TZO.com 21

Figure 5-14: Setup Tab - MAC Address Clone 22

Figure 5-15: Setup Tab - Advanced Routing 23

Figure 5-16: The Routing Table 24

Figure 5-17: Security Tab - Firewall 25

Figure 5-18: Security Tab - VPN 26

Figure 5-19: VPN Tunnel 27

Figure 5-20: Local and Remote Secure Group 27

Broadband Firewall Router with 4-Port Switch/VPN Endpoint

Figure 5-21: Remote Security Gateway 28

Figure 5-22: Key Management 28

Figure 5-23: Advanced VPN Tunnel Setup 29

Figure 5-24: Restrict Access Tab 31

Figure 5-25: Summary 31

Figure 5-26: List of PCs 32

Figure 5-27: Port Services 32

Figure 5-28: Applications & Gaming Tab - Port Range 33

Figure 5-29: Applications & Gaming Tab - Port Triggering 34

Figure 5-30: Applications & Gaming Tab - UPnP Forwarding 35

Figure 5-31: Applications & Gaming Tab - DMZ 37

Figure 5-32: Administration Tab - Management 38

Figure 5-33: Administration Tab - Log 39

Figure 5-34: View Log 39

Figure 5-35: Administration Tab - Diagnostics 40

Figure 5-36: Administration Tab - Factory Defaults 41

Figure 5-37: Administration Tab - Firmware Upgrade 41

Figure 5-38: Status Tab - Router 42

Figure 5-39: Status Tab - Local Network 43

Figure 5-40: DHCP Active IP Table 43

Figure B-1: Upgrade Firmware 57

Figure C-1: IP Configuration Screen 58

Figure C-2: MAC Address/Adapter Address 58

Figure C-3: MAC Address/Physical Address 59

Figure C-4: MAC Address Filter 59

Figure C-5: MAC Address Clone 59

Figure F-1: Local Security Screen 64

Figure F-2: Rules Tab 64

Figure F-3: IP Filter List Tab 64

Figure F-4: IP Filter LIst 65

Broadband Firewall Router with 4-Port Switch/VPN Endpoint

Figure F-5: Filters Properties 65

Figure F-6: New Rule Properties 65

Figure F-7: IP Filter List 66

Figure F-8: Filters Properties 66

Figure F-9: New Rule Properties 66

Figure F-10: IP Filter List Tab 67

Figure F-11: Filter Acton Tab 67

Figure F-12: Security Methods Tab 67

Figure F-13: Authentication Methods 68

Figure F-14: Preshared Key 68

Figure F-15: New Preshared Key 68

Figure F-16: Tunnel Setting Tab 69

Figure F-17: Connection Type Tab 69

Figure F-18: Properties Screen 69

Figure F-19: IP Filter List Tab 70

Figure F-20: Filter Action Tab 70

Figure F-21: Authentication Methods Tab 70

Figure F-22: Preshared Key 71

Figure F-23: New Preshared Key 71

Figure F-24: Tunnel Setting Tab 71

Figure F-25: Connection Type 72

Figure F-26: Rules 72

Figure F-27: Local Computer 72

Figure F-28: VPN Tab 73

Chapter 1: Introduction

Welcome

Broadband Firewall Router with 4-Port Switch/VPN Endpoint

Chapter 1: Introduction

Welcome

Thank you for choosing the Broadband Firewall Router with 4-Port Switch/VPN Endpoint. This Router provides

your network with a high-security way to share a high-speed Internet connection as well as resources, including

files and printers.

How is this done? Inside this Router you have the Internet-access sharing ability of a standard Linksys Router,

along with the network expandibility of a 4-Port 10/100 Switch, and the network security functions of VPN.

But what does all of this mean?

At the core of this Router, is a standard, Linksys Router, providing you the ability to share your broadband,

Internet access within your network. This also comes with the protection of a firewall and the easy setup and

configuration you’ve come to expect from a Linksys Router. Add to that the network expandibility of a 4-port

10/100 Switch. The four ports in the back of the Router are all auto-detecting, meaning that the Router can tell if

you’re connecting a straight-through or cross-over cable, making this easier to use than ever. Finally, adding VPN

network security to the Router allows you to secure data, not just behind the Router, but as it is transmitted over

the Internet. VPNs, or Virtual Private Networks, create virtual tunnels that connect your PC to another across the

Internet, keeping the data secure as it passes from one to another.

In this User Guide, you’ll find all you need to setup, configure, and use the Router, including appendices

describing VPNs. Welcome to secure broadband networking.

broadband: an always-on, fast Internet connection

firewall: a set of related programs located at a

network gateway server that protects the resources

of a network from users from other networks

network: a series of computers or devices

connected for the purpose of data sharing,

storage, and/or transmission between users

switch: a data switch that connects computing

devices to host computers, allowing a large number

of devices to share a limited number of ports

Chapter 1: Introduction

What’s in this Guide?

Broadband Firewall Router with 4-Port Switch/VPN Endpoint

What’s in this Guide?

This user guide covers everything you’ll need to know about the Router. In addition to giving directions in the

Chapters about how to set it up and use it, several Appendices are provided for further information.

• 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.

• Chapter 3: Getting to Know the Router

This chapter provides a quick guide to the Router’s LED display on the front and ports on the back.

• Chapter 4: Connecting the Router

This chapter instructs you on how to connect the DSL modem to the Router and connect the PC(s) to the

Router.

• Chapter 5: Using the Router’s Web-based Utility

This chapter describes the Web-based Utility and the features available, so you can use and alter advanced

configuration settings.

• 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: Upgrading Firmware

This appendix explains how you can upgrade the Router’s firmware.

• 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: Maximizing VPN Security

This appendix tells you how to get the most out of the VPN Router, using VPN tunnels.

DSL: an always-on broadband connection over

traditional phone lines

Ethernet: an IEEE standard network protocol that

specifies how data is placed on and retrieved from

a common transmission medium

firmware: the programming code that runs a

networking device

ISP (Internet Service Provider): a company that

provides access to the Internet

MAC (Media Access Control) address: the unique

address that a manufacturer assigns to each

networking device

Chapter 1: Introduction

What’s in this Guide?

Broadband Firewall Router with 4-Port Switch/VPN Endpoint

• Appendix F: Configuring IPSec between a Windows 2000 or XP PC and the VPN Router

So, how do you set your PCs up for VPN tunnels? This appendix tells you how.

• Appendix G: SNMP Functions

This appendix tells you about the Simple Network Management Protocol.

• Appendix H: Glossary

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

• Appendix I: Specifications

This appendix provides the technical specifications for the Router.

• Appendix J: Warranty Information

This appendix supplies the warranty information for the Router.

• Appendix K: Regulatory Information

This appendix supplies the regulatory information regarding the Router.

• Appendix L: Contact Information

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

IPSec (Internet Protocol Security): A VPN protocol used to

implement secure exchange of packets at the IP layer

SNMP (Simple Network Management Protocol): a widely

used network monitoring and control protocol

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