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Linksys BEFCMUH4 Cable Ga 802.11b Wireless-Ready

Linksys BEFCMUH4

Cable Gateway with 4-Port

Switch/USB

and 802.11b

Wireless-Ready

Quick Guide

COPYRIGHT & TRADEMARKS
Copyright 2002 RCA, All Rights Reserved. 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.

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

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Summary of Contents for BEFCMUH4

Page 1: ...ction 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 televisi...

Page 2: ...G 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 INSTAL...

Page 3: ... 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...

Page 4: ...ributed 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...

Page 5: ...n 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 ...

Page 6: ...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 5 ...

Page 7: ......

Page 8: ...r 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...

Page 9: ...ough 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 8 ...

Page 10: ...n 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 ...

Page 11: ...rough its self diagnostic test The LED will turn off when the self test is complete 5 Power on the network devices that connected to the Linksys BEFCMUH4 The Hardware Installation is complete Continue to the next page to configure your PCs with Linksys BEFCMUH4 10 ...

Page 12: ...icon If your Start menu doesn t have a Settings option you re running Windows XP Click the Cancel button when done You may need to do this for each computer you are connecting to the Gateway Important These instructions apply only to Windows 95 98 Millennium 2000 or XP machines For TCP IP setup under Windows NT see your Windows manual By default Windows 98 2000 Me and XP has TCP IP installed and s...

Page 13: ...Ethernet adapter Do not choose a TCP IP entry whose name mentions DUN PPPoE VPN or AOL If the work 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 Click the Properties button 3 Click the IP Address tab Select Obtain an IP address automatically 12 ...

Page 14: ...y pointing to the correct file location e g D win98 D win9x c windows options cabs etc if D is the letter of your CD ROM drive 6 Windows may ask you to restart your PC Click the Yes button If Windows does not ask you to restart restart your computer anyway Go to Chapter 5 Configure the Gateway Configuring Windows 2000 PCs 1 Go to the Network screen by clicking the Start button Click Settings and t...

Page 15: ...ou are using the Classic interface where the icons and menus look like previous Windows versions please follow the instructions for Windows 2000 1 Go to the Network screen by clicking the Start button and then Control Panel From there double click the Network Internet Connections icon and then the Network Connections icon 2 Select the Local Area Connection icon for the applicable Ethernet adapter ...

Page 16: ...several computers you will use the setup information to configure the Gateway instead of your PC You only need to configure the Gateway once using the first computer you set up 1 Open your web browser It is all right if you get an error message at this point Continue following these directions Enter http 192 168 100 1 in the browser s Address field Press the Enter key 2 An Enter Network Password w...

Page 17: ...If your ISP says that you are connecting through a static or fixed IP address from your ISP you should enter the field of Default Gateway Primary DNS and or Secondary DNS also Spoofed MAC Address An essential component of penetration testing and network wargames is the ability to specify arbitrary MAC addresses The Gateway can significantly reduce the ability of intruders to use spoofed MAC addres...

Page 18: ...you are running Netscape Navigator Click Edit Preference Advanced Proxies and click Direct Connection to the Internet If you are running Internet Explorer v5 or better click Start Settings Control Panel Internet Options Connections LAN Settings Remove the checks from all three boxes Click OK to continue Also you must disable any Internet log on software such as Ivasion Winpoet or Enternet 300 and ...

Page 19: ...t error message You can assign a static IP address to a PC by performing the following steps For Windows 95 98 and Me A Click Start Settings and Control Panel Double click Network B In The following network components are installed box select the TCP IP associated with your Ethernet adapter If you only have one Ethernet adapter installed you will only see one TCP IP line with no association to an ...

Page 20: ...t Use the following IP address option D Enter a unique IP address that is not used by any other computer on the network connected to the Gateway You can only use an IP address in the ranges 192 168 100 2 to 192 168 100 9 and 192 168 100 42 to 192 168 100 254 E Enter the Subnet Mask 255 255 255 0 F Enter the Default Gateway 192 168 100 1 Gateway s default IP address G Toward the bottom of the windo...

Page 21: ...he default interface If you are using the Classic interface where the icons and menus look like previous Windows versions please follow the instruction for Windows 2000 A Click Start and Control Panel B Click the Network and Internet Connections icon and then the Network Connections icon C Right click the Local Area Connection that is associated with the Ethernet adapter you are using and select t...

Page 22: ...cked are used by this connection box highlight Internet Properties TCP IP and click the Properties button Make sure that Obtain an IP address automatically and Obtain DNS server address automatically are selected Click the OK button in the Internet Protocol TCP IP Properties window and click the OK button in the Local Area Connection Properties window Restart the computer if asked For Windows XP T...

Page 23: ...pen a command prompt For Windows 95 98 and Me please click Start and Run In the Open field type in command Press the Enter key or click the OK button For Windows NT 2000 and XP please click Start and Run In the Open field type cmd Press the Enter key or click the OK button C In the command prompt type ping 192 168 100 1 and press the Enter key If you get a reply the computer is communicating with ...

Page 24: ... Make sure you have the right cable Check to see if the Cable Modem column has a solidly lit Link LED D Make sure the cable connecting from your ISP is connected to the Gateway s Cable port Verify that the Status page of the Gateway s web interface shows a valid IP address from your ISP E Turn off the computer Gateway Wait 30 seconds and then turn on the Gateway and computer Check the Status tab o...

Page 25: ...the web server s Ethernet adapter IP address is 192 168 100 2 you would enter 2 in the field provided The 0 is to disable port service When you have completed the configuration click the Apply button 6 I need to set up online game hosting or use other Internet applications If you want to play online games or use Internet applications most will work without doing any port forwarding or DMZ hosting ...

Page 26: ...gs If the port number that the data enters from does not have port forwarding then the Gateway will send the data to whichever PC or network device you set for DMZ hosting Follow these steps to set DMZ hosting A Access the Gateway s web based utility by going to http 192 168 100 1 or the IP address of the Gateway Go to the Advanced Forwarding tab B Disable or remove the entries you have entered fo...

Page 27: ...k the Connections tab C Click the LAN settings button and remove anything that is checked D Click the OK button to go back to the previous screen E Click the option Never dial a connection This will remove any dial up pop ups for PPPoE users For Netscape 4 7 or higher A Start Netscape Navigator and click Edit Preferences Advanced and Proxies B Make sure you have Direct connection to the Internet s...

Page 28: ...sh the firmware by assigning a static IP address to the computer then upgrade the firmware Try using the following settings IP Address 192 168 1 50 and Subnet Mask 255 255 255 0 To set a static IP address refer to Problem 1 I need to set a static IP address 13 When I enter a URL or IP address I get a time out error or a prompted to retry Check if other PCs work If they do ensure that your workstat...

Page 29: ...cape Navigator is set to Direct connection to the Internet 14 The Full Col LED keeps flickering continuously Check the Category 5 Ethernet cable and it RJ 45 connectors There may be interference with other network devices Try removing other PCs or network devices to see if the problem persists Eliminate each network device one at a time to determine the cause 28 ...

Page 30: ...rity since the address of a PC connected to the private LAN is never transmitted on the Internet Furthermore NAT allows the Gateway to be used with low cost Internet accounts when only one TCP IP address is provided by the ISP The user may have many private addresses behind this single address provided by the ISP Does the Gateway support any operating system other than Windows 95 Windows 98 Window...

Page 31: ... of the server computer How can I block corrupted FTP downloads If you are experiencing corrupted files when you download a file with your FTP client try using another FTP program The web page hangs downloads are corrupt or nothing but junk characters are being displayed on the screen What do I need to do Force your Ethernet adapter to 10Mbps or half duplex mode and turn off the Auto negotiate fea...

Page 32: ... to be open It is recommended that you set your computer with a static IP if you want to use DMZ Hosting If DMZ Hosting is used does the exposed user share the public IP with the Gateway No Is the Gateway cross platform compatible Any platform that supports Ethernet and TCP IP is compatible with the Gateway How many ports can be simultaneously forwarded Theoretically the Gateway can establish 520 ...

Page 33: ...nstitute Electronic Industries Association Standard 568 is one of several standards that specify categories the singular is commonly referred to as CAT of twisted pair cabling systems wires junctions and connectors in terms of the data rates that they can sustain CAT5 cable has a maximum throughput of 100 Mbps and is usually utilized for 100BaseTX networks Default Gateway The routing device used t...

Page 34: ...l network inserted as a neutral zone between a company s private network and the outside public network It prevents outside users from getting direct access to a server that has company data DNS The domain name system DNS is the way that Internet domain name are located and translated into Internet Protocol IP addresses A domain name is a meaningful and easy to remember handle for an Internet addr...

Page 35: ...firewall working closely with a Gateway program examines each network packet to determine whether to forward it toward its destination Firmware Programming that is inserted into programmable read only memory programmable read only memory thus becoming a permanent part of a computing device FTP File Transfer Protocol A protocol used to transfer files over a TCP IP network Internet UNIX etc For exam...

Page 36: ...ecial areas such as the IEEE Computer Society IP Address In the most widely installed level of the IP Internet Protocol today an IP address is a 32 binary digit number that identifies each sender or receiver of information that is sent in packet across the Internet When you request an HTML page or send e mail the Internet Protocol part of TCP IP includes your IP address in the message actually in ...

Page 37: ...e network and the other is the outside NIC Network Interface Card A board installed in a computer system usually a PC to provided network communication capabilities to and from that computer system Also called an adapter Packet Filtering Discarding unwanted network traffic based on its originating address or range of addresses or its type e mail file transfer etc Ping Packet INternet Groper An int...

Page 38: ...s up to eight wires used for connecting Ethernet devices Roaming The ability to use a wireless device and be able to move from one access point s range to another without losing the connection Router Protocol dependent device that connects sub networks together Routers are useful in breaking down a very large network into smaller sub networks they introduce longer delays and typically have much lo...

Page 39: ...f the TCP IP program just as every other computer that you may send messages to or get information from also has a copy of TCP IP UDP User Datagram Protocol A method protocol used along with the IP Internet Protocol to send data in the form of message units datagram between network devices over a LAN or WAN While IP takes care of handling the actual delivery of the data routing UDP takes care of k...

Page 40: ... installed in two or more pairs all within a single cable WAN A communications network that covers a wide geographic area such as state or country WEP Wired Equivalent Privacy A data privacy mechanism based on a 64 bit shared key algorithm as described in the IEEE 802 11 standard WINIPCFG Configuration utility based on the Win32 API for querying defining and managing IP addresses within a network ...

Page 41: ...ork card has been successfully installed inside the PC These instructions are for Windows 95 Windows 98 and Windows Me For TCP IP setup under Windows NT 2000 and XP see your Windows documentation 1 Click the Start button Choose Settings and then Control Panel 2 Double click on the Network icon to bring up your Network window Select the Configuration tab Figure D 1 3 Click the Add button 40 ...

Page 42: ...uble click on Protocol 5 Highlight Microsoft under the list of manufacturers 6 Find and double click TCP IP in the list to the right see Figure D 2 Figure D 2 7 After a few seconds the main Network window will appear The TCP IP Protocol should now be listed 41 ...

Page 43: ...e D 3 8 Click the OK button Windows may ask for original Windows installation files Supply them as needed e g c windows options cabs D win98 D win95 D win9x 9 Windows will ask you to restart the PC Click the Yes button The TCP IP installation is now complete 42 ...

Page 44: ...apter The IP address is used for filtering forwarding and DMZ Follow the steps in this appendix to find the MAC address or IP address for your adapter in Windows 95 98 Me NT 200 and XP For Windows 95 98 and Me 1 Click on Start and Run In the Open field enter winipcfg Then press the Enter key or the OK button Figure E 1 2 When the IP Configuration window appears select the Ethernet adapter you are ...

Page 45: ... see Figure E 3 This is the MAC address for your Ethernet adapter and will be shown as a series of numbers and letters Figure E 3 The example in Figure E 3 shows the IP address of your Ethernet adapter as 192 168 45 131 Your computer may show something different Note The MAC address is also called the Adapter Address 44 ...

Page 46: ... key or click the OK button 2 In the command prompt enter ipconfig all Then press the Enter key Figure E 4 3 Write down the Physical Address as shown on your computer screen it is the MAC address for your Ethernet adapter This will appear as a series of letters and numbers Note The MAC address is also called the Adapter Address The example in Figure E 4 shows the IP address of your Ethernet adapte...

Page 47: ... GHz Unlicensed ISM radio band CPU 140 MHz MIPS32 ISA SDRAM 32Mb Flash ROM 16Mb System Power 12V 700mA Power Supply 12V 1 25A EMI EMC FCC Class B CE Class B VCCI Class B Operation Requirement Operating Temp 0ºC to 40ºC 32ºF to 104ºF Storage Temp 20ºC to 70ºC 4ºF to 158ºF Operating Humidity 10 to 85 Non Condensing Storage Humidity 5 to 90 Non Condensing Dimensions 186 x 155 x 63 mm 46 ...

Page 48: ...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 ...

Page 49: ...ions included in the user document ation provided with the product Any changes or modifications including the antennas made to this device that are not expressly approved by the manufacturer may void the user s authority to operate the equipment The manufacturer is not responsible for any radio or television interference caused by unauthorized modification of this device or the substitution of the...

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