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Appendix A: Troubleshooting

This appendix consists of two parts: “Common Problems and Solutions” and
“Frequently Asked Questions.” Provided are possible solutions to problems
regarding the installation and operation of the Router. 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. I need to set a static IP address on a PC.

The Router, by default, assigns an IP address range of 192.168.1.100 to
192.168.1.150 using the DHCP server on the Router. To set a static IP address, you
can only use the ranges 192.168.1.2 to 192.168.1.99 and 192.168.1.151 to
192.168.1.254. Each PC or network device that uses TCP/IP must have a unique
address to identify itself in a network. If the IP address is not unique to a network,
Windows will generate an IP conflict error message. You can assign a static IP
address to a PC by performing the following steps:

For Windows 98 and Millennium:

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 Ethernet
adapter. Highlight it and click the

Properties

button.

C. In the

TCP/IP properties

window, select the

IP address

tab, and select

Specify

an IP address

. Enter a unique

IP address

that is not used by any other com-

puter on the network connected to the Router. You can only use an IP address
in the ranges 192.168.1.2 to 192.168.1.99 and 192.168.1.151 to
192.168.1.254. Make sure that each IP address is unique for each PC or net-
work device.

D. Click the

Gateway

tab, and in the

New Gateway

prompt, enter

192.168.1.1

,

which is the default IP address of the Router. Click the

Add

button to accept

the entry.

E. Click the

DNS

tab, and make sure the

DNS Enabled

option is selected. Enter

the

Host

and

Domain

names (e.g., John for Host and home for Domain).

Enter the

DNS entry

provided by your ISP. If your ISP has not provided the

DNS IP address, contact your ISP to get that information or go to its website
for the information.

F. Click the

OK

button in the

TCP/IP properties

window, and click

Close

or the

OK

button for the Network window.

G. Restart the computer when asked.

Common Problems and Solutions

Figure 6-32

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Summary of Contents for BEFSR41

Page 1: ...Use this guide to install the following product BEFSR41 User Guide Etherfast Cable DSL Router with 4 Port Switch ...

Page 2: ...EVENUE OR PROFIT OR FOR SPECIAL INDIRECT CONSE QUENTIAL INCIDENTAL OR PUNITIVE DAMAGES HOWEVER CAUSED REGARDLESS OF THE THEORY OF LIABILITY ARISING OUT OF OR RELATED TO THE USE OF OR INABILITY TO USE THE PRODUCT EVEN IF LINKSYS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES IN NO EVENT WILL LINKSYS LIABILITY EXCEED THE AMOUNT PAID BY YOU FOR THE PRODUCT The foregoing limitations will apply ev...

Page 3: ...ntly Asked Questions 74 Appendix B Glossary 78 Appendix C Installing the TCP IP Protocol 91 Table of Contents Chapter 1 Introduction 1 The Linksys EtherFast Cable DSL Router 1 Features 1 An Introduction to LANs and the Internet 2 IP Addresses 3 Network Setup Overview 5 Chapter 2 Getting to Know the Router 6 The Router s Rear Panel 6 The Router s Front Panel LEDs 7 Chapter 3 Connect the Router 8 Ov...

Page 4: ... on one computer when another s hard drive starts to fill up It s all easier than you think the included Setup Wizard takes you through configuring the Router step by step The Router can act as a DHCP server for your network so your PCs are configured automatically Universal Plug and Play UPnP lets specialized Internet applications configure the Router so you don t have to Built in Parental Contro...

Page 5: ...seen from the Internet for your network is the Router s Internet IP address However even this Internet IP address for the Router can be blocked so that the Router and network seem invisible to the Internet see the Block Anonymous Internet Requests description under Security Filter in Chapter 6 The Router s Web based Utility Simply put a router is a network device that connects two networks togethe...

Page 6: ...d password to gain access to the Internet This is a dedicated high speed con nection type called Point to Point Protocol over Ethernet PPPoE PPPoE is similar to a dial up connection but PPPoE does not dial a phone number when establishing a connection PPPoE also will provide the Router with a dynamic IP address to establish a connection to the Internet DHCP Dynamic Host Configuration Protocol Serv...

Page 7: ... 2 1 Internet The Internet port is where you connect your cable or DSL modem through an Ethernet cable Your modem connection will not work from any other port Ports 1 4 These four Ethernet ports connect to network devices such as PCs print servers and remote hard drives Power The Power port is where you will connect the power adapter The Router s Rear Panel Figure 2 1 The Reset Button The Reset bu...

Page 8: ... 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 Router 1 Before you begin make sure that all of your hardware is powered off includ ing the Router PCs hubs switches and cable or DSL modem 2 Connect one end of an...

Page 9: ...rating system your computer is running such as Windows 98 Millennium 2000 or XP You will need to know which operating system your computer is running You can find out by clicking the Start button and then going to the Settings option Then click Control Panel and then double click the System icon If your Start menu doesn t have a Settings option you re running Windows XP Click the Cancel button whe...

Page 10: ...3 3 Click the IP Address tab and select Obtain an IP address automatically as shown in Figure 4 2 4 Now click the Gateway tab to ensure that the Installed Gateway field is left blank Click the OK button 5 Click the OK button again Windows may ask you for the original Windows installation disk or additional files Supply them by pointing to the correct file location e g D win98 D win9x c windows opt...

Page 11: ... for the applicable Ethernet adapter usually it is the first Local Area Connection listed Double click the Local Area Connection 3 The Local Area Connection Status screen will appear as shown in Figure 4 6 Click the Properties button 15 4 Select Internet Protocol TCP IP as shown in Figure 4 4 and click the Properties button 5 Select Obtain an IP address automatically as shown in Figure 4 5 Once th...

Page 12: ...nformation from your ISP If you do not have this information please contact your ISP before proceeding The instructions from your ISP tell you how to set up your PC for Internet access Because you are now using the Router to share Internet access among several computers you will use the setup information to configure the Router instead of your PC You only need to configure the Router once using th...

Page 13: ...ing When you are fin ished with the Internet Setup section proceed to step 4 DHCP or Obtain an IP Address Automatically If your ISP says that you are connecting through DHCP or a dynamic IP address from your ISP perform these steps A Select Obtain an IP auto matically as the Internet Connection Type as shown in Figure 5 4 B Click the Save Settings button to save this change or click the Cancel Cha...

Page 14: ...r click the Cancel Changes button to undo your changes B Click the Status tab and then click the Connect button C Proceed to step 4 Figure 5 8 Figure 5 9 PPPoE If your DSL provider says that you are connecting through PPPoE or if you nor mally enter a user name and password to access the Internet perform these steps A Select PPPoE as the Internet Connection Type as shown in Figure 5 6 B Enter the ...

Page 15: ...ress Translation NAT Dynamic Routing and Static Routing configurations Security Filter To block specific users from Internet access you can set up IP address port and MAC address filtering on the Filter screen VPN Passthrough To enable or disable IPSec PPPoE and or PPTP Pass through use this screen 23 4 In the Optional Settings section you may need to provide a host name and domain name for the Ro...

Page 16: ...click this tab UPnP Forwarding Use this screen to alter UPnP forwarding settings DMZ To allow one local user to be exposed to the Internet for use of special purpose services use this screen Administration Management On this screen alter router access privileges and UPnP settings Log If you want to view or save activity logs click this tab Factory Defaults If you want to restore the Router s facto...

Page 17: ...ed by your ISP enter the Service Name Connect on Demand and Max Idle Time You can configure the Router to cut your connection with your ISP after a specified period of time Max Idle Time If you have been disconnected due to inactivity Connect on Demand enables the Router to automatically re establish your connection as soon as you attempt to access the Internet again If you wish to activate Connec...

Page 18: ...nternet access connected indefinitely even when it sits idle To use this option click the radio button next to Keep Alive The default Redial Period is 30 sec onds When you are finished click the Save Settings button Then click the Status tab and click the Connect button to start the connection Figure 6 8 RAS for SingTel Remote Access Service RAS shown in Figure 6 7 is a service that applies to con...

Page 19: ...92 168 1 1 Number of Address Optional Enter the maximum number of PCs that you want the DHCP server to assign IP addresses to This number cannot be greater than 253 In order to determine the DHCP IP Address range add the starting IP address e g 100 to the number of DHCP users By default as shown in Figure 6 9 add 100 to 50 and the range is 192 168 1 100 to 192 168 1 149 31 30 Heart Beat Signal Hea...

Page 20: ...hen finished making your changes on this tab click the Save Settings button to save these changes or click the Cancel Changes button to undo your changes For further help on this tab click the Help button 33 32 DDNS Figure 6 10 DHCP Address Range The range of DHCP addresses is displayed here Client Lease Time The Client Lease Time is the amount of time a network user will be allowed connection to ...

Page 21: ...e Cancel Changes button to undo your changes For further help on this tab click the Help button 35 34 Figure 6 12 DynDNS org User Name Password and Host Name Enter the User Name Password and Host Name of the account you set up with DynDNS org Internet IP Address The Router s current Internet IP Address is displayed here Because it is dynamic it will change Status The status of the DDNS service con...

Page 22: ...it code assigned to a unique piece of hardware for identification like a social security number If your ISP requires MAC address registration find your adapter s MAC address by following the instructions in Appendix D Finding the MAC Address and IP Address for Your Ethernet Adapter MAC Clone MAC Clone Service To use MAC address cloning select Enable MAC Address To manually clone a MAC address ente...

Page 23: ...s of the remote network or host to which you want to assign a static route Enter the IP address of the host for which you wish to create a static route If you are build ing a route to an entire network be sure that the network portion of the IP address is set to 0 For example the Router s standard IP address is 192 168 1 1 Based on this address the address of the routed network is 192 168 1 with t...

Page 24: ...icult for intruders to work their way into your network Select Enabled to block anonymous Internet requests or Disabled to allow anonymous Internet requests Filter Multicast Multicasting allows for multiple transmissions to specific recipients at the same time If multicasting is permitted then the Router will allow IP multicast packets to be forwarded to the appropriate computers Select Enabled to...

Page 25: ...through click the Disabled button When finished making your changes on this tab click the Save Settings button to save these changes or click the Cancel Changes button to undo your changes For further help on this tab click the Help button 42 When you click the Applications Gaming tab you will see the Port Range Forwarding screen see Figure 6 19 Port Range Forwarding sets up public services on you...

Page 26: ...dd a server using Port Range Forwarding complete the fol lowing fields Application Enter the name of the application Start and End Enter the number or range of external ports s used by the serv er or Internet application Check with the Internet application software docu mentation for more information Protocol Select the protocol TCP or UDP or select Both IP Address Enter the IP address of the serv...

Page 27: ... click the Help button 46 47 The UPnP screen displays preset application settings as well as options for cus tomization of port services for other applications UPnP Forwarding Application Ten preset applications are preset You can specify up to five addi tional applications in the available fields The preset applications are among the most widely used Internet applications They include the followi...

Page 28: ...l and easy to remember handle for an Internet address TFTP Trivial File Transfer Protocol A version of the TCP IP FTP protocol that has no directory or password capability Finger A UNIX command widely used on the Internet to find out information about a particular user such as a telephone number whether the user is cur rently logged on and the last time the user was logged on The person being fing...

Page 29: ...reen allows one local user to be exposed to the Internet for use of a special purpose service such as Internet gaming and videoconferencing Whereas Port Range Forwarding can only forward a maximum of 10 ranges of ports DMZ hosting forwards all the ports for one PC at the same time DMZ DMZ To use this feature select Enable To disable DMZ hosting select Disable DMZ Host IP Address To expose one PC e...

Page 30: ... When you are in a remote location and wish to manage the Router enter http Internet IP Address port Enter the Router s specific Internet IP Address in place of Internet IP Address and enter the Administration Port number in place of the word port When you click the Administration tab you will see the Log screen see Figure 6 24 It provides you with a log of all incoming and outgoing URLs or IP add...

Page 31: ...ites that users on your network have accessed The LAN IP address Destination URL IP and Service Port Number for each site are listed Click the Refresh button to update the log See Figure 6 26 View Log Click the View Logs button to display a log of all activities and to access a drop down menu of various logs to view see Figure 6 27 From the drop down menu select the log you wish to view All System...

Page 32: ...re establish an Internet connection Router Figure 6 30 The Firmware Upgrade screen allows you to upgrade the Router s firmware Before upgrading the firmware download the Router s firmware upgrade file from the Linksys website www linksys com Then extract the file Upgrade Firmware Please select a file to upgrade In the field provided enter the name of the extracted firmware upgrade file or click th...

Page 33: ...button to update the information Local Network Figure 6 31 Internet IP Address The Router s Internet IP Address is displayed here Subnet Mask and Default Gateway The Router s Subnet Mask and Default Gateway address are displayed here for DHCP and static IP connections Primary DNS and Secondary DNS Shown here are the DNS Domain Name System IP addresses currently used by the Router DHCP Release Avai...

Page 34: ...ol 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 Ethernet adapter Highlight it and click the Properties button C In the TCP IP properties window select the IP address tab and select Specify an IP add...

Page 35: ...k and Dial Up Connections B Right click the Local Area Connection that is associated with the Ethernet adapter you are using and select the Properties option C In the Components checked are used by this connection box highlight Internet Protocol TCP IP and click the Properties button Select Use the following IP address option D Enter a unique IP address that is not used by any other computer on th...

Page 36: ...C Set a static IP address on your system refer to Problem 1 I need to set a static IP address D Refer to Problem 10 I need to remove the proxy settings or the dial up pop up window for PPPoE users Click the OK button in the Internet Protocol TCP IP Properties win dow and click the OK button in the Local Area Connection Properties window Restart the computer if asked B Open a command prompt For Win...

Page 37: ...hrough tab Make sure you have IPsec pass through and or PPTP pass through enabled VPNs that use IPSec with the ESP Encapsulation Security Payload known as protocol 50 authentication will work fine At least one IPSec session will work through the Router however simultaneous IPSec sessions may be possible depending on the specifics of your VPNs VPNs that use IPSec and AH Authentication Header known ...

Page 38: ...e Router Enter the default password admin and click the Administration Management tab B Enter a different password in the Router Password field and enter the same password in the second field to confirm the password C Click the Save Settings button 69 7 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 wo...

Page 39: ...gain follow steps E and F to re establish connection 71 10 I am a PPPoE user and I need to remove the proxy settings or the dial up pop up window If you have proxy settings you need to disable these on your computer Because the Router is the gateway for the Internet connection the computer does not need any proxy settings to gain access Please follow these directions to verify that you do not have...

Page 40: ...t DSL users it is strongly recom mended to use MTU 1492 If you are having some difficulties perform the fol lowing steps A To connect to the Router go to the web browser and enter http 192 168 1 1 or the IP address of the Router B Enter the password if asked The default password is admin C On the Basic Setup tab look for the MTU option and select Enable In the Size field enter 1492 D Click the Sav...

Page 41: ...website at www linksys com where they can be downloaded for free The Router s firmware can be upgraded with TFTP programs If the Router s Internet connection is working well there is What is the maximum number of IP addresses that the Router will support The Router will support up to 253 IP addresses Is IPSec Passthrough supported by the Router Yes enable or disable IPSec Passthrough on the Securi...

Page 42: ...or 5 0 or higher for Macintosh I am not able to get the web configuration screen for the Router What can I do You may have to remove the proxy settings on your Internet browser e g Netscape Navigator or Internet Explorer Or remove the dial up settings on your browser Check with your browser documentation and make sure that your browser is set to connect directly and that any dial up is disabled Ma...

Page 43: ...hen a device wants to gain access to the net work it checks to see if the network is quiet senses the carrier If it is not it waits a random amount of time before retrying If the network is quiet and two devices access the line at exactly the same time their signals collide When the collision is detected they both back off and each waits a random amount of time before retrying Appendix B Glossary ...

Page 44: ...that is used with the programs An 81 Daisy Chain Connected in series one after the other Transmitted signals go to the first device then to the second and so on Database A database is a collection of data that is organized so that its con tents can easily be accessed managed and updated Data Packet One frame in a packet switched message Most data communi cations is based on dividing the transmitte...

Page 45: ...s can be handled without requir ing changes to individual user computers IRQ Interrupt ReQuest A hardware interrupt on a PC There are 16 IRQ lines used to signal the CPU that a peripheral event has started or terminated Except for PCI devices two devices cannot use the same line 83 enterprise with an intranet that allows its workers access to the wider Internet installs a firewall to prevent outsi...

Page 46: ...PCI slots on the motherboard In a Pentium PC there is generally a mix of PCI and ISA slots or PCI and EISA slots Early on the PCI bus was known as a local bus ISP An ISP Internet service provider is a company that provides individuals and companies access to the Internet and other related services such as website building and virtual hosting LAN A local area network LAN is a group of computers and...

Page 47: ...e hardware how to process the data 87 86 PCI provides plug and play capability automatically configuring the PCI cards at startup When PCI is used with the ISA bus the only thing that is gen erally required is to indicate in the CMOS memory which IRQs are already in use by ISA cards PCI takes care of the rest PCI allows IRQs to be shared which helps to solve the problem of limited IRQs available o...

Page 48: ...uce crosstalk or electro magnetic induction between pairs of wires two insulated copper wires are twist ed around each other Each signal on twisted pair requires both wires Since some telephone sets or desktop locations require multiple connections twisted pair is sometimes installed in two or more pairs all within a single cable SOHO Small Office Home Office Market segment of professionals who wo...

Page 49: ...ate as if they were physically connected to a single LAN independent of the actual physical configuration of the network Virtual Server Multiple servers that appear as one server or one system image to the operating system or for network administration Wake on LAN Wake on LAN is a technology that allows a network profes sional to remotely power on a computer or to wake it up from sleep mode WAN A ...

Page 50: ...n field enter winipcfg as shown in Figure D 1 Then press the Enter key or the OK button 2 When the IP Configuration window appears select the Ethernet adapter you are using to connect to the Router via a CAT 5 Ethernet cable as shown in Figure D 2 93 6 Find and double click TCP IP in the list to the right see Figure C 2 7 After a few seconds the main Network window will appear The TCP IP Protocol ...

Page 51: ... Figure D 3 This is the MAC address for your Ethernet adapter and will be shown as a series of numbers and letters The MAC address Adapter Address is what you will use for MAC Address Cloning or MAC Filtering The example in Figure D 3 shows the IP address of your Ethernet adapter as 192 168 1 100 Your computer may show something different For Windows 2000 and XP The following steps show an alterna...

Page 52: ... RJ 45 Port for Broadband Modem Four 10 100 RJ 45 Switched Ports Cabling Type Ethernet Category 5 LED Indicators Power Ethernet Internet UPnP able cert Yes OS Support Windows 98SE Me 2000 XP Network Protocols TCP IP NetBEUI IPX SPX Dimensions 7 32 x 6 06 x 1 89 186 mm x 154 mm x 48 mm Unit Weight 12 28 oz 0 35 kg Power Input External 9V AC 1000 mA Certifications FCC CE Operating Temperature 0 C to...

Page 53: ...ROOF OF PURCHASE AND A BARCODE FROM THE PRODUCT S PACKAGING ON HAND WHEN CALLING RETURN REQUESTS CANNOT BE PROCESSED WITHOUT PROOF OF PURCHASE IN NO EVENT SHALL LINKSYS S LIABILITY EXCEED THE PRICE PAID FOR THE PRODUCT FROM DIRECT INDIRECT SPECIAL INCI DENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OF THE PRODUCT ITS ACCOMPANYING SOFTWARE OR ITS DOCUMENTATION LINKSYS DOES NOT OFFER REFUNDS...

Page 54: ... Copyright 2003 Cisco Systems Inc All rights reserved www linksys com ...

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