Instant Broadband® Series Cable Gateway Modem / Router / USB / Home PNA / 4-Port Switch / Wireless-Ready Use this guide to install the following product: BEFCMUH4 User Guide COPYRIGHT & TRADEMARKS Copyright © 2002 Linksys, All Rights Reserved. Instant Broadband is a trademark of Linksys. Linksys is a registered trademark of Linksys. Microsoft, Windows, and the Windows logo are registered trademarks of Microsoft Corporation. All other trademarks and brand names are the property of their respective proprietors. LIMITED WARRANTY Linksys guarantees that every Instant BroadbandTM Cable Gateway Modem / Router / USB / Home PNA / 4-Port Switch / Wireless-Ready will be free from physical defects in material and workmanship for one year from the date of purchase, when used within the limits set forth in the Specifications section of this User Guide. If the product proves defective during this warranty period, call Linksys Technical Support in order to obtain a Return Authorization number. BE SURE TO HAVE YOUR PROOF OF PURCHASE ON HAND WHEN CALLING. When returning a product, mark the Return Authorization number clearly on the outside of the package and include a copy of your original proof of purchase. RETURN REQUESTS CANNOT BE PROCESSED WITHOUT PROOF OF PURCHASE. All customers located outside of the United States of America and Canada shall be held responsible for shipping and handling charges. IN NO EVENT SHALL LINKSYS'S LIABILITY EXCEED THE PRICE PAID FOR THE PRODUCT FROM DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OF THE PRODUCT, ITS ACCOMPANYING SOFTWARE, OR ITS DOCUMENTATION. LINKSYS OFFERS NO REFUNDS FOR ITS PRODUCTS. Linksys makes no warranty or representation, expressed, implied, or statutory, with respect to its products or the contents or use of this documentation and all accompanying software, and specifically disclaims its quality, performance, merchantability, or fitness for any particular purpose. Linksys reserves the right to revise or update its products, software, or documentation without obligation to notify any individual or entity. Please direct all inquiries to: Linksys P.O. Box 18558, Irvine, CA 92623. FCC PART 15 CLASS B STATEMENT In compliance with the Federal Communications Commission (FCC), the following FCC Part 15 Regulations are provided regarding the installation and operation of the Linksys BEFCMUH4 Cable Gateway. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with 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 can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: UG-BEFCMUH4-rg-121302NC-BW Instant Broadband® Series · · · · Reorient or relocate the receiving antenna. Increase the separation between the equipment and the receiver. Connect the equipment to an outlet on a circuit different from that to which the receiver is connected. Consult a dealer or an experienced radio/TV technician for assistance. Cable Gateway Table of Contents Chapter 1: Introduction The Linksys Cable Gateway Features An Introduction to LANs and WANs IP Addresses Network Setup Overview Chapter 2: Getting to Know the Cable Gateway The Cable Gateway's Back Panel Ports The Reset Button Rebooting the Cable Gateway The Cable Gateway's Front Panel LEDs The USB Icon USB Cabling HPNA Cabling Chapter 3: Connecting the Cable Gateway Chapter 4: Configuring the PCs Overview Windows 95, Windows 98, Windows Me Windows 2000 Windows XP Chapter 5: Using the Cable Gateway's Web-based Utility Assessing the Web-Based Utility The Basic Tabs The Advanced Tabs The Firewall Tabs The Status Tabs The Wireless Tabs 1 1 1 2 2 4 5 5 6 6 6 8 8 8 9 11 11 11 13 15 This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: · · This device may not cause harmful interference. This device must accept any interference received, including interference that may cause undesired operation. SAFETY NOTICES · · · Caution: To reduce the risk of fire, use only No.26 AWG or larger telecommunication line cord. Do not use this product near water, for example, in a wet basement or near a swimming pool. Avoid using this products (other than a cordless type) during an electrical storm. There may be a remote risk of electric shock from lightning. 17 17 18 21 30 33 39 Instant Broadband® Series Cable Gateway Chapter 1: Introduction Appendix A: Troubleshooting Common Problems and Solutions Frequently Asked Questions Appendix B: Configuring Wireless Security in Windows XP Appendix C: Installing the TCP/IP Protocol Appendix D: Finding the MAC Address and IP Address for Your Ethernet Adapter Appendix E: Glossary Appendix F: Specifications Environmental Appendix G: Warranty Information Appendix H: Contact Information 46 46 47 The Linksys Cable Gateway Thank you for choosing the Instant BroadbandTM Cable Gateway. This Gateway allows you to set up a network with your PCs and share your Internet connection. The Gateway does this by connecting to your Cable line, and using the Gateway's Ethernet ports to connect your PCs; it's like each PC is connected directly to the Internet. This way, you have an Ethernet network where you have several PCs utilizing one Internet connection simultaneously. Plus, if you add a Linksys wireless PC Card, it can be used as an Access Point and the Gateway can bridge your Ethernet network with your wireless PCs. The PCs that you connect to the Gateway, when properly configured, create a LAN, or Local Area Network. They are connected with an Ethernet cable plugged into your computer's Ethernet adapter at one end and into one of the Gateway's LAN ports (numbered from one to four) at the other end. The term "Ethernet" is used to refer to your network accessories, such as cables and adapters, because Ethernet refers to the type of network that you are setting up. Ethernet refers to the accessories that transfer computer data from 10Mbps to 100Mbps (speeds used by network devices.) The Gateway allows you to share your Cable connection using a built-in Cable modem, and can plug directly into your Cable-enabled wall jack (Cable service line). The PCs that are connected to the Gateway share this connection. 51 57 59 63 74 76 77 78 Features · · · · · · · · Prevents DoS (Denial of Service) Attacks E-mail and Web-based Logging of Security Events MAC Address Filtering, Port Forwarding, DMZ Support Configurable through Your Networked PC's Web Browser Supports VPN Pass-Through for IPSec, PPTP, and L2TP Protocols Internal 4-Port Switch Dramatically Speeds Up Your Network DHCP Server Capability to Assign IP Addresses Automatically Wireless Capabilities Available with Use of Optional WPC11 (sold separately) · Supports a High Data Rate of up to 11Mbps for up to 28 Simultaneous Wireless Connections · Capable of 64 and 128-Bit WEP Encryption 1 Instant Broadband® Series An Introduction to LANs and WANs Simply put, a router is a network device that connects two networks together. The Cable Gateway has a built-in router that connects your Local Area Network (LAN), which is the group of PCs in your home or office, to the Wide Area Network (WAN), which is the Internet. The Cable Gateway processes and regulates the data that travels between these two networks. Think of the Cable Gateway as a network device with two sides: the first side is made up of your private Local Area Network (LAN) of PCs. The other, public side, is the Internet, or the Wide Area Network (WAN), outside of your home or office. The Cable Gateway's firewall protects your network of PCs so users on the public, Internet side cannot "see" your PCs. This is how your local network, remains private. The Cable Gateway protects your network by inspecting the first packet coming in through the WAN port before delivery to the final destination in the local network. The Cable Gateway inspects Internet port services like the web server, ftp server, or other Internet applications, and, if allowed, will forward the packet to the appropriate PC on the LAN side. IP Addresses What's an IP Address? IP stands for Internet Protocol. Every device on 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 WAN and LAN connections. There are two ways of assigning an IP address to your network devices. Static IP Addresses 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. Cable Gateway Dynamic IP Addresses A dynamic IP address is automatically assigned to a device on the network, such as PCs and print servers. These IP addresses are called "dynamic" because they are only temporarily assigned to the PC or 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. DHCP (Dynamic Host Configuration Protocol) Servers DHCP frees you from having to assign IP addresses manually every time a new user is added to your network. PCs and other network devices using dynamic IP addressing are assigned a new IP address by a DHCP server. The PC or network device obtaining an IP address is called the DHCP client. By default, the Cable Gateway's WAN setting is DHCP client. A DHCP server can either be a designated PC on the network or another network device, such as the Cable Gateway. By default, the Cable Gateway acts as a DHCP server for your local network. If you already have a DHCP server running on your network, you must disable that DHCP server or the Cable Gateway's DHCP's feature. If you run more than one DHCP server on your network, you will experience network errors, such as conflicting IP addresses. Note: Even if you assign a static IP address to a PC, other PCs can still use DHCP's dynamic IP addressing, as long as the static IP address is not within the DHCP range of the LAN IP Address. If the Cable Gateway's DHCP feature fails to provide a dynamic IP address, refer to "Appendix A: Troubleshooting." Note: Since the Cable Gateway is a device that connects two networks, it needs two IP addresses--one for the LAN side, and one for the WAN side. In this User Guide, you'll see references to the "WAN IP address" and the "LAN IP address." Since the Cable Gateway has firewall security, the only IP address on your network that can be seen from the Internet is the Cable Gateway's WAN IP address. 2 3 Instant Broadband® Series Network Setup Overview This user guide covers the basic steps for setting up a network with the Cable Gateway. After going through the Chapter 2: Getting to Know the Cable Gateway, proceed through the following chapters: · Chapter 3: Connecting the Cable Gateway This chapter instructs you on how to connect the coaxial Cable line to the Cable Gateway and connect the PC(s) to the Cable Gateway. · Chapter 4: Configuring the PCs This chapter instructs you on how to configure your PC(s) for a DHCP connection, if the network settings are not already set to DHCP. · Chapter 5: Using the Cable Gateway's Web-based Utility This chapter explains how to configure the Cable Gateway for wireless networking using your web browser and the Cable Gateway's web-based utility. When you're finished with the basic steps, you are ready to connect to the Internet through your new network. An example of such a network is shown in Figure 1-1. Cable Gateway Chapter 2: Getting to Know the Cable Gateway The Cable Gateway's Back Panel Ports The Cable Gateway's ports are located on the back panel of the Cable Gateway, as shown in Figure 2-1. Figure 2-1 On/Off Switch This switch is used for turning the Cable Gateway on and off. The Power port is where you will connect the power adapter. Press this button to restore the Cable Gateway to it factory default settings. This is where you can connect your cable for Home PNA. This is where you can use a USB cable to connect a PC or other network device to the Cable Gateway. These four ports are used to connect ne ...