Linksys BEFCMUH4 Manuel utilisateur

Linksys BEFCMUH4 Cable Gatewayr + 802.11b Wireless-Ready

Linksys BEFCMUH4

Cable Gateway with 4-Port

Switch/USB and 802.11b

Wireless-Ready

Quick Guide

Windows, and the Windows logo are registered trademarks

of Microsoft Corporation. All other trademarks and brand

names are the property of their respective proprietors.

FCC STATEMENT

The Linksys BEFCMUH4 has been tested and complies with

the specifications for a Class B digital device, pursuant to

Part 15 of the FCC Rules. These limits are designed to

provide reasonable protection against harmful interface in a

residential installation. This equipment generates, uses, and

can radio frequency energy and, if not installed and used

according to the instructions, may cause harmful interference

to radio communications. However, there is no guarantee

that interference will not occur in a particular installation. If

this equipment does cause harmful interference to radio or

television reception, which is found by turning the equipment

off and on, the user is encouraged to try to correct the

interference by one or more of the following measure:

• Reorient or relocate the receiving antenna

• Increase the separation between the equipment of devices

• Connect the equipment to an outlet other than the receiver

• Consult a dealer or an experienced radio/TV technician for

assistance

Linksys BEFCMUH4 Cable Gatewayr + 802.11b Wireless-Ready

Table of Contents

CHAPTER 1: INTRODUCTION.............................................................................. 2

OVERVIEW ................................................................................................................. 2

SOFTWARE FEATURES ................................................................................................ 2

MINIMUM REQUIREMENTS......................................................................................... 4

PACKAGE CONTENTS.................................................................................................. 4

CHAPTER 2: USING THE LINKSYS BEFCMUH4 ............................................. 6

THE LINKSYS BEFCMUH4’S REAR PANEL ............................................................... 6

THE LINKSYS BEFCMUH4’S FRONT PANEL ............................................................. 7

CHAPTER 3: CONNECT THE GATEWAY ........................................................... 9

OVERVIEW ................................................................................................................. 9

CONNECTING YOUR HARDWARE TOGETHER AND BOOTING UP................................. 9

CHAPTER 4: CONFIGURE YOUR PCS ...............................................................11

OVERVIEW ............................................................................................................... 11

CONFIGURING WINDOWS 95, 98, AND MILLENNIUM PCS........................................ 11

CONFIGURING WINDOWS 2000 PCS........................................................................ 13

CONFIGURING WINDOWS XP PCS........................................................................... 14

CHAPTER 5: CONFIGURE THE GATEWAY..................................................... 15

CONFIGURING THE LINKSYS BEFCMUH4 .............................................................. 15

APPENDIX A: TROUBLESHOOTING ................................................................ 18

COMMON PROBLEMS AND SOLUTIONS ..................................................................... 18

FREQUENTLY ASKED QUESTIONS............................................................................. 29

APPENDIX B: GLOSSARY .................................................................................... 32

APPENDIX C: INSTALLING THE TCP/IP PROTOCOL ................................. 40

APPENDIX D: FINDING THE MAC ADDRESS AND IP ADDRESS FOR

YOUR ETHERNET ADAPTER ............................................................................. 43

APPENDIX E: SPECFICATIONS.......................................................................... 46

Linksys BEFCMUH4 Cable Gatewayr + 802.11b Wireless-Ready

Chapter 1: Introduction

Overview

Thank you for purchasing the Linksys BEFCMUH4 Cable Gateway. The

Linksys BEFCMUH4 provides the ideal solution for connecting your wireless

network to a high-speed broadband Internet connection and a 10/100 Fast

Ethernet backbone. Configurable as a DHCP server for your existing network,

the Linksys BEFCMUH4 acts as the only externally recognized Internet

gateway on your local area network (LAN) and serve as an Internet NAT

firewall against unwanted outside intruders. The Linksys BEFCMUH4 can also

be configured to filter internal users’ access to the Internet.

A typical gateway relies on a hub or a switch to share its Internet connection,

but the Linksys BEFCMUH4 channels this connection through the blazing, full

duplex of its built-in 10/100 4-Port Switch. This cutting-edge combination of

wireless router and switch technology eliminates the need to buy an additional

hub or switch and extends the range of your wireless network. Now your entire

wireless network can enjoy blazing broadband Internet connections supported

by its robust switched backbone. With the dual-function speed and power of

the Linksys BEFCMUH4, your network will take off at speeds faster than you

ever imagined possible.

Software Features

DOCSIS Features

 Cable Modem (CM) is 1.0 and non 1.1 upgradeable

 Concatenation, Fragmentation, Payload Header suppression, IGMP

and BPI and BPI Plus are supported features for DOCSIS 1.1

 4/16/32/64/128/256/512/1024 QAM Downstream Receiver

 2/4/8/16/32/64/128/256 QAM Advanced TDMA Upstream Transmitter

 Both IP and LLC filters are supported

 Sixteen (16) destination address filters and 256 multicast/unicast DA

filters

 Sixteen (16) independent upstream queues for multiple QoS support

Linksys BEFCMUH4 Cable Gatewayr + 802.11b Wireless-Ready

USB Features

 OS (Win2K, XP, WinME) supported for USB interface

Wireless Features

 Supports at least one beacon/DTIM interval of within the range

20-1000κμs

 Supports reception of fragmented packets

 Supports reception of RTS and generation of CTS

Firewall Features

 Stateful Packet Inspection against both Denial of Service and

Distributed Denial of Service attacks and will protect against the

following:

 Reassembly attacks

 SYN Attack (SYN Flood)

 ICMP Flood

 Ping of Death Attack

 Tear Drop Attack

 IP Spoofing Attack

 LAND Attack

 Jolt

 Winnuke Attack (Netbios out-of-bound)

 OverDrop

 BONK, BOINK

 Blind Spoofing

 Echo/Chargen

 Storm

 Smurf Attack

 Mime Flood

 De-Militarized Zone (DMZ) which allows a computer on the LAN to

expose all of its ports to the WAN that are not otherwise filtered

 Logged Events which all security incidents will be logged

 Keyword blocking is based on keywords in a URL and can be

specified by the user

Linksys BEFCMUH4 Cable Gatewayr + 802.11b Wireless-Ready

NAT Requirements

The implementation of NAT must allow for specific port redirection. Listed

below are applications supported.

 FTP

 IRC

 H.323

 Quake

 Blizzard games

 Chat ALG

 Real Audio/Video

 CUSEEME

 Netmeeting

 MS Games but not with game zone

 DIABOLO II

 Activision Games

 PCAnywhere

 SSL

 NNTP

 Port Forwarding, incoming traffic that is not part of an existing

connection will be dropped unless the user specifies forwarding of the

server to a host on the LAN

Virtual Private Network (VPN) Feature

 Having the ability to enable or disable PPTP and IPSec pass through

Minimum Requirements

One RJ-45 Broadband Internet connection, with a Cable Modem



One PC with an installed 10Mbps, 100Mbps, or 10/100 Mbps Ethernet

card (optional)

TCP/IP network protocol for each PC

UTP network cable with RJ-45 connector

Microsoft Internet Explorer 4.0 or later, or Netscape Navigator 4.0 or later.

(5.0 and 4.7, respectively, are strongly recommended.)

Windows 95, 98, Millennium, NT 4.0, 2000 or XP

Package Contents

Linksys BEFCMUH4 Cable Gatewayr + 802.11b Wireless-Ready

 {1} Cable Modem

 {1} AC Power adapter

 {1} CAT.5 Ethernet cable {RJ-45}

 {1} USB cable

 {1} User’s Manual

Linksys BEFCMUH4 Cable Gatewayr + 802.11b Wireless-Ready

the Gateway’s data and restore the factory defaults. This should be done only

if you are experiencing heavy routing problems, and only after you have

exhausted all of the other troubleshooting options. By resetting the Gateway,

you run the risk of creating conflicts between your PCs’ actual IP Addresses

and what the Gateway thinks their IP Addresses should be. You may be forced

to reboot the entire system(s).

If your Gateway locks up, simply power it down for 5 seconds by removing the

power cable from the Gateway’s Power Port. Leaving the power off for too

long could result in the loss of network connections.

The Linksys BEFCMUH4’s Front Panel

Power Green. The power LED illuminates when the device is powered

on.

Diag Red. The Diag LED illuminates when the device goes through its

self-diagnosis mode during boot-up and restart. It will turn off

upon successful completion of the diagnosis.

The LAN indicators

USB Green. The USB LED illuminates when the USB port is properly

connected to your PC.

WLAN Green. The WLAN LED illuminates when the Wireless PC card

slide-in.

Link/Act Green. Steady on when link is up and blinking when data is

following through this LAN port.

Full/Col Green. Steady on when it operates at full duplex mode. Off at

half duplex mode. Blinking when collision is occurred on this

Linksys BEFCMUH4 Cable Gatewayr + 802.11b Wireless-Ready

port.

10/100 Green. Steady on when a successful 100Mbps connection is

made through the corresponding port.

The WAN indicators

Cable Green. Steady on when cable is registered and ready to transfer

data. Blinking when no downstream RF carrier present.

Receive Green. Blinking when user data going through the cable modem

to PC present.

Send Green. Blinking when user data going through the cable modem

from PC present.

Linksys BEFCMUH4 Cable Gatewayr + 802.11b Wireless-Ready

Chapter 3: Connect the Gateway

Overview

Unlike a simple hub or switch, the Gateway’s setup consists of more than

simply plugging hardware together. You will have to configure your networked

PCs to accept the IP addresses that the Gateway assigns them (if applicable),

and you will also have to configure the Gateway with setting(s) provided by

your Internet Service Provider (ISP).

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 data.

Once you have the setup information you need for your specific type of

Internet connection, you can begin installation and setup of the Gateway.

Connecting Your Hardware Together and Booting Up

1. Before you begin, make sure that all of you hardware is powered off,

including the Gateway, PCs, hubs, and switches.

2. Connect one end of an Ethernet cable to one of the LAN ports (labeled 1, 2,

3, or 4) on the back of the Gateway and the other end to a standard port on

a network device, e.g., a PC, print server, hub, or switch. Repeat the above

step to connect more PCs or network devices to the Gateway.

3. Connect the cable from your ISP to the Cable port on the Gateway’s back

panel.

4. Connect the power-supply cable to the Power port on the rear of the

Gateway, then plug the supplied AC power cable into a power outlet and

power on the Linksys BEFCMUH4.

• The Power LED on the front panel will light up green as soon as the

power adapter is connected properly.

• The Diag LED will light up red for a few seconds when the Gateway

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