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.
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. 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.
Instant Broadband® Series Cable Gateway Chapter 1: Introduction Appendix A: Troubleshooting Common Problems and Solutions Frequently Asked Questions 46 46 47 Appendix B: Configuring Wireless Security in Windows XP 51 Appendix C: Installing the TCP/IP Protocol 57 Appendix D: Finding the MAC Address and IP Address for Your Ethernet Adapter 59 Appendix E: Glossary 63 Appendix F: Specifications Environmental 74 76 Appendix G: Warranty Information 77 Appendix H: Contact Information 78 The Links
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.
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.
Instant Broadband® Series Cable Gateway The Reset Button Briefly pressing the Reset Button, along with rebooting the Cable Gateway, will refresh the Cable Gateway’s connections. If the Cable Gateway locks up, simply press the Reset Button or power it down for three to five seconds. Pressing the Reset Button and holding it in for a few seconds will clear all of the Cable Gateway’s data and restore the factory defaults.
Instant Broadband® Series The USB Icon The USB icon, shown in Figure 2-3, marks a USB port on a PC or device. Cable Gateway Chapter 3: Connecting the Cable Gateway You will connect the Cable Gateway to your Cable service’s coaxial cable line and to the computers in your home or business. Figure 2-3 First, make sure that all the devices that you’ll be working with are powered down, including your PCs and the Cable Gateway. USB Cabling The Cable Gateway comes with one USB cable.
Instant Broadband® Series Cable Gateway Chapter 4: Configuring the PCs Overview The instructions in this chapter will help you configure each of your computers to be able to communicate with the Cable Gateway. To do this, you need to configure your PC’s network settings to obtain an IP (or TCP/IP) address automatically (called DHCP). Computers use IP addresses to communicate with each other across a local network or the Internet.
Instant Broadband® Series 2. On the Configuration tab, select the TCP/IP line for the applicable Ethernet adapter, as shown in Figure 4-1. Do not choose a TCP/IP entry whose name mentions DUN, 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 “Appendix C: Installing the TCP/IP Protocol” or your Ethernet adapter’s documentation to install TCP/IP now.) Click the Properties button. Cable Gateway 4.
Instant Broadband® Series 4. Select Internet Protocol (TCP/IP), as shown in Figure 4-4, and click the Properties button. Cable Gateway Windows XP 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), please follow the instructions for Windows 2000. 1. Open the Network screen. To do this, click the Start button and select the Control Panel.
Instant Broadband® Series 4. Select Internet Protocol (TCP/IP), and click the Properties button. Cable Gateway Chapter 5: Using the Cable Gateway’s Web-based Utility Accessing the Web-Based Utility For your convenience, an administrative utility has been programmed into the Cable Gateway. From this browser-based utility, you can view the Cable Gateway’s current status and, when wireless functions are enabled, administer the wireless settings. This chapter explains all of the functions in this utility.
Instant Broadband® Series The Basic Tabs The Setup Tab Cable Gateway Duration The length of the DHCP lease for the IP assigned by your Cable Provider. Expires The date and time that the DHCP lease expires. After this time, your Cable Provider may assign a different IP address to your Cable Gateway. Renew NAT Lease Click the Renew NAT Lease button to manually renew the DHCP lease of the IP address assigned by the Cable Provider. Host Name If your ISP requires a host name, enter it in this field.
Instant Broadband® Series Cable Gateway The DHCP Tab The Advanced Tabs This screen allows you to configure the DHCP server. Options Tab This screen allows you to choose advanced features for your Gateway. Figure 5-5 Figure 5-4 Number of CPEs Enter the maximum number of PCs that you want the DHCP server to assign IP addresses to. This number cannot be greater than 253. Starting Local Address Enter a value for the DHCP server to start with when issuing IP Addresses.
Instant Broadband® Series Remote Config Management This feature allows you to manage the Cable Gateway from a remote location, via the Internet. Click Enable. To remotely manage your Cable Gateway,. enter http://:8080 into the browser of any PC on the Internet. Press the Enter key. Cable Gateway IP Filtering Tab This screen allows you to configure IP address filters for your Gateway.
Instant Broadband® Series Cable Gateway MAC Filtering Tab Port Filtering Tab This screen allows you to configure MAC Address filters. This screen allows you to configure TCP/UDP port filters. This feature allows you to filter users by network port numbers Figure 5-3 Figure 5-3 Enter the MAC Addresses that you want to filter into the MAC Address Filters fields. Click the Apply button to apply any changes to the settings.
Instant Broadband® Series Forwarding Tab This screen allows you configure port forwarding for local IP Addresses. Cable Gateway You may use this feature to establish a web server or FTP server for Internet users to access. Be sure that you enter a valid IP address; you may need to establish a static IP address with your ISP in order to properly run an Internet server. For added security, Internet users will be able to communicate with the server, but they will not actually be connected.
Instant Broadband® Series Cable Gateway Port Triggers Tab DMZ Host Tab This screen allows you configure TCP/UDP port triggers. Port Triggering is a method that allows multiple computers on your network to access a server, such as a game server. A trigger request is made to the Router, which opens an incoming port for that computer. This screen allows you to configure an address that is visible to the WAN.
Instant Broadband® Series The Firewall Tabs Cable Gateway Domain Blocking Click Enable to use this feature. Then, enter the website you want to block. Click the Add Domain button after each entry. To remove a word from the list, highlight the word, then click the Remove Domain button. Deny Domains Click Deny Domains if you want to disallow the websites in the Domain List. Allow Domains Click Allow Domains if you want to allow a the websites in the Domain List.
Instant Broadband® Series Cable Gateway The Event Log Tab The Status Tabs This screen provides access to the firewall event log. The Software Tab This screens shows a summary of information on the Cable Gateway, its software, and its status, as shown in Figure 5-3. There are two sections: Information and Status. Contact Email Address Figure 5-3 Enter your email address into the Contact Email Address field so you can be notified when there is an occurrence.
Instant Broadband® Series Cable Modem MAC Address This is the Cable Gateway’s MAC Address. This is the address that will be registered with your Cable provider to enable Internet access. Cable Modem Serial Number This field identifies a unique identifying number and bar code format assigned to every Cable Gateway manufactured. CM certificate This field identifies if the cable modem certificate is installed on the Cable Gateway.
Instant Broadband® Series Cable Gateway The Security Tab The Diagnostics Tab This screens allows you to change your password for the Cable Gateway and restore the Cable Gateway’s factory default settings, as shown in Figure 5-5. This page provides ping diagnostics for the LAN and WAN networks. Password To change your network administrator’s password for the Cable Gateway, enter the new password into the Password field. Then, re-enter it into the ReEnter Password field and click the Apply button.
Instant Broadband® Series Cable Gateway No. of Pings Enter the number of pings into the field. The Wireless Tabs Ping Interval Enter the interval of the pings into the field. Ping Timeout Enter the timeout of the pings into the field. Start Test Click the Start Test button to start the ping test.
Instant Broadband® Series Cable Gateway The Basic Tab The Privacy Tab From the Basic tab, shown in Figure 5-7, you can view and set basic wireless settings for your wireless network. From the Privacy tab, you can enable and configure WEP encryption on your wireless network. Using WEP encryption is a good way of keeping your network secure and can be used in either 64-bit or 128-bit mode.
Instant Broadband® Series 42 Cable Gateway Using 64-Bit Encryption Using 128-Bit Encryption Selecting 64-bit encryption will bring up a screen similar to that shown in Figure 5-7. Selecting 128-bit encryption will bring up a screen similar to that shown in Figure 5-8. Figure 5-7 Figure 5-8 Select the Default Key that you will be using for your wireless network, and then enter the encryption key in the fields under the heading “64-Bit Keys” for the corresponding key number you chose.
Instant Broadband® Series Cable Gateway DTIM Interval The Advanced Tab From the Advanced tab, shown in Figure 5-9, you can configure the Cable Gateway’s more advanced wireless features. This value indicates the interval of the Delivery Traffic Indication Message (DTIM). A DTIM field is a countdown field informing clients of the next window for listening to broadcast and multicast messages.
Instant Broadband® Series Appendix A: Troubleshooting Common Problems and Solutions This section provides possible solutions to problems regarding the Cable Gateway’s installation and operation. If your situation is described here, the problem should be solved by applying the corresponding solution. If you can’t find an answer here, check the Linksys website at www.linksys.com. 1. The Cable Gateway is not working. • Verify that the Power cord and other network cables are plugged in.
Instant Broadband® Series What is Network Address Translation and what is it used for? Network Address Translation (NAT) translates multiple IP addresses on the private LAN to one public address that is sent out to the Internet. This adds a level of security since the address of a PC connected to the private LAN is never transmitted on the Internet. Furthermore, NAT allows the Cable Gateway to be used with low cost Internet accounts, when only one TCP/IP address is provided by the ISP.
Instant Broadband® Series Does the Cable Gateway pass PPTP packets or actively route PPTP sessions? The Cable Gateway allows PPTP packets to pass through. Is the Cable Gateway cross-platform compatible? Any platform that supports Ethernet and TCP/IP is compatible with the Cable Gateway. How many ports can be simultaneously forwarded? Theoretically, the Cable Gateway can establish 520 sessions at the same time, but you can only forward 10 ranges of ports.
Instant Broadband® Series The following steps will help you enable WEP and enter the encryption key manually for your wireless PC cards, in order to enable your Windows XP system to communicate with the Gateway wirelessly. Cable Gateway 2. In the “Control Panel” window, click the Network and Internet Connections icon. These steps assume that you are running Windows XP in the default mode. Be sure you have the WEP Key generated in the Gateway, shown in the Key 1 field. 1.
Instant Broadband® Series If a “Connect to Wireless Network” window appears, in the Available Networks section, click the desired wireless network, specified by the Gateway’s SSID. Then, double-click the Wireless Network Connection icon. Figure B-4 5. When the “Wireless Network Connection Status” window appears, click the Properties button. Cable Gateway 6. When the “Wireless Network Connection Properties” window appears, click the Wireless Networks Tab. Figure B-6 7.
Instant Broadband® Series 8. The “Wireless Network Properties” window will appear. Click the check box for the Data encryption (WEP enabled) option. Remove the check from the Network Authentication (Shared mode) and The key is provided for me automatically fields. Cable Gateway Appendix C: Installing the T C P/ I P Protocol In the "Network key" field, enter the exact Key (all 10 or 26 digits, depending on the level of encryption) generated by the Gateway.
Instant Broadband® Series 6. Find and double-click TCP/IP in the list to the right (see Figure C-2). Cable Gateway Appendix D: Finding the MAC Address and IP Address for Your Ethernet Adapter This section describes how to find the MAC address for your Ethernet adapter to do either MAC Filtering for the Gateway and ISP. You can also find the IP address of your computer’s Ethernet adapter. The IP address is used for filtering.
Instant Broadband® Series 3. Write down the Adapter Address as shown on your computer screen (see Figure D-3). This is the MAC address for your Ethernet adapter and will be shown as a series of numbers and letters. Cable Gateway 2. In the command prompt, enter ipconfig /all. Then press the Enter key. The MAC address/Adapter Address is what you will use for MAC Filtering. Figure D-3 The example in Figure D-3 shows the IP address of your Ethernet adapter as 192.168.1.100.
Instant Broadband® Series When entering the information using the Router’s web-based utility, you will type the 12-digit MAC address in this format, XXXXXXXXXXXX without the hyphens for MAC Filtering. Cable Gateway Appendix E: Glossary 10BaseT - An Ethernet standard that uses twisted wire pairs. 100BaseTX - IEEE physical layer specification for 100 Mbps over two pairs of Category 5 UTP or STP wire. 802.11b - One of the IEEE standards for wireless networking hardware.
Instant Broadband® Series Broadband - A data-transmission scheme in which multiple signals share the bandwidth of a medium. This allows the transmission of voice, data and video signals over a single medium. Cable television uses broadband techniques to deliver dozens of channels over one cable. Browser - A browser is an application program that provides a way to look at and interact with all the information on the World Wide Web or PC.
Instant Broadband® Series DTIM (Delivery Traffic Indication Message) - A DTIM field is a countdown field informing clients of the next window for listening to broadcast and multicast messages. When the AP has buffered broadcast or multicast messages for associated clients, it sends the next DTIM with a DTIM Interval value. AP Clients hear the beacons and awaken to receive the broadcast and multicast messages.
Instant Broadband® Series Hub - The device that serves as the central location for attaching wires from workstations. Can be passive, where there is no amplification of the signals; or active, where the hubs are used like repeaters to provide an extension of the cable that connects to a workstation. ICQ - A conferencing program for the Internet that provides interactive chat, e-mail and file transfer and can alert you when someone on your predefined list has also come online.
Instant Broadband® Series offices, and at meetings. A notebook computer, sometimes called a laptop computer, typically weighs less than five pounds and is three inches or less in thickness. Packet - A unit of data routed between an origin and a destination in a network. Packet Filtering - Discarding unwanted network traffic based on its originating address or range of addresses or its type (e-mail, file transfer, etc.).
Instant Broadband® Series Cable Gateway Switch - 1. A data switch connects computing devices to host computers, allowing a large number of devices to share a limited number of ports. 2. A device for making, breaking, or changing the connections in an electrical circuit. USB 1.1-compliant devices support data rates of 1.5Mbps (low-speed) and up to 12Mbps (full-speed). USB 2.0-compliant devices are backward compatible with earlier USB devices, and they support data rates of 1.
Instant Broadband® Series Cable Gateway Appendix F: Specifications Model Number BEFCMUH4 Standards DOCSIS 1.0, PC Card 16-bit standard, IEEE 802.3 (10BaseT), IEEE 802.3u (100BaseTX), USB Specifications 1.1, IEEE 802.
Instant Broadband® Series Appendix G: Warranty Information Environmental 76 Cable Gateway Dimensions: 7.26" x 6.1" x 2.26" (184 mm x 155 mm x 57 mm) Unit Weight: 20 oz. (0.567 kg) Power: External, 12V AC, 1.25 A Certifications: FCC Class B, Part 68, CE Mark Operating Temp.: 0ºC to 40ºC (32ºF to 104ºF) Storage Temp.
Instant Broadband® Series Appendix H: Contact Information For help with the installation or operation of the Cable Gateway, contact Linksys Technical Support at one of the phone numbers or Internet addresses below. Sales Information Technical Support RMA Issues Fax Email Web site FTP site 800-546-5797 (1-800-LINKSYS) 800-326-7114 (toll free from U.S. or Canada)* 949-271-5461 949-265-6655 support@linksys.com http://www.linksys.com http://support.linksys.com ftp://ftp.linksys.
