Linksys RT41-BU Page 12 User Manual Download

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Chapter 3: Getting to Know the Router
The Back Panel

Wired Broadband Router

Chapter 3: Getting to Know the Router

The Back Panel

The Router’s ports and the Reset button are located on the back panel of the Router.

Internet

This

Internet

port connects to your cable or DSL modem.

Ethernet 1-4

These four

Ethernet

ports connect to network devices, such as PCs, print servers, or

additional switches.

Reset Button

There are two ways to reset the Router to its factory default settings. Either press the

Reset

button for approximately five seconds, or restore the defaults from the Administration tab -
Factory Defaults of the Router's Web-based Utility.

Power

The

Power

port is where you will connect the power adapter.

Figure 3-1: Back Panel

NOTE:

If you use the Reset button, the Router’s

settings will be reset to their factory defaults.

Summary of Contents for RT41-BU

Page 1: ...A Division of Cisco Systems Inc Model No Wired Broadband Router RT41 BU User Guide ...

Page 2: ... technical terms that are presented like this Also each figure diagram screenshot or other image is provided with a figure number and description like this Figure numbers and descriptions can also be found in the List of Figures section This exclamation point means there is a caution or warning and is something that could damage your property or the Router word definition This checkmark means ther...

Page 3: ...Utility 11 The Setup Tab Basic Setup 11 The Setup Tab DDNS 16 The Setup Tab MAC Address Clone 17 The Security Tab Firewall 18 The Security Tab VPN 19 The Access Restrictions Tab Internet Access 20 The Applications Gaming Tab Port Range Forward 22 The Applications Gaming Tab Port Trigger 23 The Applications Gaming Tab UPnP Forward 24 The Applications Gaming Tab DMZ 26 The Administration Tab Managem...

Page 4: ...45 Appendix B Finding the MAC Address and IP Address for Your Ethernet Adapter 49 Windows 98 or Me Instructions 49 Windows 2000 or XP Instructions 49 For the Router s Web based Utility 50 Appendix C Windows Help 51 Appendix D Glossary 52 Appendix E Specifications 57 Appendix F Warranty Information 58 Appendix G Regulatory Information 59 Appendix H Contact Information 65 ...

Page 5: ... 16 Figure 5 9 Setup Tab MAC Address Clone 17 Figure 5 10 Security Tab Firewall 18 Figure 5 11 Security Tab VPN Passthrough 19 Figure 5 12 Access Restrictions Tab Internet Access 20 Figure 5 13 Internet Policy Summary 20 Figure 5 14 List of PCs 21 Figure 5 15 Applications Gaming Tab Port Range Forward 22 Figure 5 16 Applications Gaming Tab Port Trigger 23 Figure 5 17 Applications Gaming Tab UPnP F...

Page 6: ...ministration Tab Backup and Restore 33 Figure 5 29 Administration Tab Reboot 33 Figure 5 30 Status Tab Router 34 Figure 5 31 Status Tab Local Network 35 Figure 5 32 DHCP Clients Table 35 Figure B 1 IP Configuration Screen 49 Figure B 2 MAC Address Adapter Address 49 Figure B 3 MAC Address Physical Address 50 Figure B 4 Access Restrictions MAC and IP Addresses 50 Figure B 5 MAC Address Clone 50 ...

Page 7: ...et access so you don t need more than one high speed Internet connection Plus you can access one printer from different computers and access data located on another computer s hard drive Networks are even used for playing multiplayer video games So networks not only are useful in homes and offices but also can be fun PCs on a wired network create a LAN or Local Area Network They are connected with...

Page 8: ... 1 Introduction This chapter describes the Router s applications and this User Guide Chapter 2 Networking Basics This chapter briefly explains how a network functions Appendix A Troubleshooting This appendix describes some possible problems and solutions as well as frequently asked questions regarding installation and use of the Router Appendix B Finding the MAC Address and IP Address for Your Eth...

Page 9: ...oadband Router Appendix G Regulatory Information This appendix supplies the regulatory information regarding the Router Appendix H Contact Information This appendix provides contact information for a variety of Linksys resources including Technical Support ...

Page 10: ...s 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 If you use the Router to share your cable or...

Page 11: ...d to gain access to the Internet This is a dedicated high speed connection 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 It also will provide the Router with a dynamic IP address to establish a connection to the Internet By default a DHCP server on the LAN side is enabled on the...

Page 12: ...ports connect to network devices such as PCs print servers or additional switches Reset Button There are two ways to reset the Router to its factory default settings Either press the Reset button for approximately five seconds or restore the defaults from the Administration tab Factory Defaults of the Router s Web based Utility Power The Power port is where you will connect the power adapter Figur...

Page 13: ...system self test Ethernet 1 4 Green The Ethernet LED serves two purposes If the LED is solidly lit the Router is connected to a device through the corresponding port Ethernet 1 2 3 or 4 If the LED is flashing the Router is sending or receiving data over that port Internet Green The Internet LED lights up when the Router is connected to your cable or DSL modem If the LED is flashing the Router is s...

Page 14: ...Ethernet network cable to one of the numbered ports on the back of the Router Connect the other end to an Ethernet port on a network device e g a PC print server or switch Repeat this step to connect more PCs or other network devices to the Router 4 Power on the broadband modem 5 Connect the included power adapter to the Router s Power port and then plug the power adapter into an electrical outlet...

Page 15: ...this information you can call your ISP to request the settings Once you have the setup information for your specific type of Internet connection then you can configure the Router Management Click the Administration tab and then the Management tab The Router s default password is admin To secure the Router change the Password from its default There are six main tabs Setup Security Access Restrictio...

Page 16: ...se of special purpose services Administration Management Alter the Router s password and access privileges as well as the SNMP and UPnP settings Log If you want to view or save activity logs click this tab Diagnostics Use this screen to check the connections of your network components Factory Defaults If you want to restore the Router s factory defaults then use this screen Firmware Upgrade This s...

Page 17: ... your changes For help information on a tab click Help The Setup Tab Basic Setup The Basic Setup screen is the first screen you see when you access the Web based Utility Internet Setup The Internet Setup section configures the Router for your Internet connection type This information can be obtained from your ISP Internet Connection Type The Router supports four connection types Automatic Configur...

Page 18: ...he Router to automatically re establish your connection as soon as you attempt to access the Internet again If you wish to activate Connect on Demand click the radio button If you want your Internet connection to remain on at all times enter 0 in the Max Idle Time field Otherwise enter the number of minutes you want to have elapsed before your Internet access disconnects Keep Alive and Redial Peri...

Page 19: ...ime field Otherwise enter the number of minutes you want to have elapsed before your Internet access disconnects Keep Alive and Redial Period This option keeps your Internet access connected indefinitely even when it sits idle If you select this option the Router will periodically check your Internet connection If the connection is down then the Router will automatically re establish the connectio...

Page 20: ...er on your network Unless you already have one it is highly recommended that you leave the Router enabled as a DHCP server DHCP Server DHCP is enabled by factory default If you already have a DHCP server on your network set the Router s DHCP option to Disable If you disable DHCP remember to assign a static IP address to the Router Starting IP Address Enter a value for the DHCP server to start with...

Page 21: ... WINS converts NetBIOS names to IP addresses If you use a WINS server enter that server s IP address here Otherwise leave this field blank Time Setting Time Zone Select the time zone in which your network functions from this pull down menu If you want the Router to automatically adjust its clock for daylight savings click the checkbox next to Automatically adjust clock for daylight saving changes ...

Page 22: ...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 connection is displayed here When you have finished making changes to this screen click the Save Settings button to save the changes or click the Cancel Changes button to undo your changes For help information click Hel...

Page 23: ... Enter the MAC Address registered with your ISP Then click the Save Settings button Clone Your PC s MAC If you want to clone the MAC address of the PC you are currently using to configure the Router then click the Clone Your PC s MAC button The Router will automatically detect your PC s MAC address so you do NOT have to call your ISP to change the registered MAC address to the Router s MAC address...

Page 24: ...ated using this programming language Click the checkbox to enable Java Applet filtering Filter ActiveX ActiveX is a programming language for websites If you deny ActiveX you run the risk of not having access to Internet sites created using this programming language Click the checkbox to enable ActiveX filtering Filter Multicast Multicasting allows for multiple transmissions to specific recipients ...

Page 25: ...hrough click the Disable button L2TP Passthrough Layer 2 Tunneling Protocol Passthrough is the method used to enable Point to Point PPP sessions via the Internet on the Layer 2 level To allow L2TP Passthrough click the Enable button To disable L2TP Passthrough click the Disable button When you have finished making changes to this screen click the Save Settings button to save the changes or click t...

Page 26: ...om the drop down menu will display that policy s settings To delete a policy select that policy s number and click the Delete button To view all the policies click the Summary button Status Policies are disabled by default To enable a policy select the policy number from the drop down menu and click the radio button beside Enable To disable a policy select the policy number from the drop down menu...

Page 27: ...hen click the button to add the service to the Blocked services list You can block up to two services per policy If you want to remove a service from the Blocked services list then select it and click the button If the service you want is not available then you can add a service Enter the service s name in the Service Name field Select its protocol from the Protocol drop down menu and enter its ra...

Page 28: ...er or range of external port s used by the server or Internet application Check with the Internet application software documentation for more information Protocol Select the protocol TCP or UDP or select Both IP Address Enter the IP address of the server that you want the Internet users to be able to access To find the IP address go to Appendix C Finding the MAC Address and IP Address for Your Eth...

Page 29: ...ort number s needed Start Port Enter the starting port number of the Triggered Range End Port Enter the ending port number of the Triggered Range Forwarded Range Protocol Select the protocol TCP or UDP For each application list the forwarded port number range Check with the Internet application documentation for the port number s needed Start Port Enter the starting port number of the Forwarded Ra...

Page 30: ...s and forwards the mail DNS Domain Name System The way that Internet domain names are located and translated into IP addresses A domain name is a meaningful 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...

Page 31: ...sed by the server in the Ext Port column Check with the Internet application documentation for more information TCP or UDP Select the protocol UDP or TCP for each application You cannot select both protocols Int Port Enter the number of the internal port used by the server in the Int Port column Check with the Internet application software documentation for more information IP Address Enter the IP...

Page 32: ...se port is being forwarded must have its DHCP client function disabled and should have a new static IP address assigned to it because its IP address may change when using the DHCP function DMZ DMZ To use this feature select Enable To disable DMZ hosting select Disable DMZ Host IP Address To expose one PC enter the computer s IP address To get the IP address of a computer refer to Appendix C Findin...

Page 33: ...ment This feature allows you to manage the Router from a remote location via the Internet To enable Remote Management click the Enable radio button For Remote Management the https feature is automatically enabled so a Secure Sockets Layer SSL connection will be used to enhance the security of your data transmissions When you are in a remote location and wish to manage the Router enter https Intern...

Page 34: ...eceive trap messages or notices sent by the Router SNMP Trap Destination Enter the IP address of the remote host computer that will receive the trap messages UPnP UPnP UPnP allows Windows XP and Me to automatically configure the Router for various Internet applications such as gaming and videoconferencing To enable UPnP click the Enable radio button When you have finished making changes to this sc...

Page 35: ...Log Viewer IP Address field enter the fixed IP address of the PC running the Logviewer software The Router will now send updated logs to that PC Incoming Log Click the Incoming Log button to view a temporary log of the Source IP addresses and Destination Port Numbers for all the incoming Internet traffic Click the Refresh button to update the log Outgoing Log Click the Outgoing Log button to view ...

Page 36: ... you wish to test it 5 10 or unlimited Then click the Ping button To stop the test click the Stop button Click the Clear Log button to clear the screen Click the Close button to return to the Diagnostics screen Traceroute Test To test the performance of a connection click the Traceroute button Enter the IP address or domain name of the PC whose connection you wish to test and click the Traceroute ...

Page 37: ...em to its factory defaults click the Yes radio button After you have clicked the Yes radio button click the Save Settings button to restore the Router to its factory defaults or click the Cancel Changes button to undo your change For help information click Help Figure 5 26 Administration Tab Factory Defaults NOTE Do not restore the factory defaults unless you are having difficulties with the Route...

Page 38: ...file to upgrade In the field provided enter the name of the extracted firmware upgrade file or click the Browse button to find this file Upgrade After you have selected the appropriate file click the Upgrade button and follow the on screen instructions download to receive a file transmitted over a network firmware the programming code that runs a networking device upgrade to replace existing softw...

Page 39: ...and follow the on screen instructions Restore After you have selected the appropriate file click the Restore button and follow the on screen instructions For help information click Help The Administration Tab Reboot The Reboot screen allows you to remotely reboot the Router from your computer Reboot Device Reboot Click the Yes radio button if you want to reboot the Router Otherwise keep the defaul...

Page 40: ...For these dial up style connections PPPoE and PPTP the status of the connection is displayed and there is a Connect button to click if there is no connection and you want to establish an Internet connection 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 shown here DNS 1 2 Shown here are the DNS ...

Page 41: ...ess of the range assigned by the Router End IP Address This is the last IP address of the range assigned by the Router DHCP Clients Table Click the DHCP Clients Table button to view a list of PCs that have been assigned IP addresses by the Router The DHCP Active IP Table screen lists the DHCP Server IP Address Client Host Names IP Addresses MAC Addresses and Expiration dates Click the Delete check...

Page 42: ... DHCP server on the Router To set a static IP address you can only use the ranges 192 168 15 2 to 192 168 15 99 and 192 168 15 151 to 192 168 15 254 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 perform...

Page 43: ...uter You can only use an IP address in the ranges 192 168 15 2 to 192 168 15 99 and 192 168 15 151 to 192 168 15 254 E Enter the Subnet Mask 255 255 255 0 F Enter the Default Gateway 192 168 15 1 Router s default IP address G Toward the bottom of the window select Use the following DNS server addresses and enter the Preferred DNS server and Alternative DNS server provided by your ISP Contact your ...

Page 44: ...dows 2000 1 Click Start Settings and Control Panel Double click Network and Dial Up Connections 2 Right click the Local Area Connection that is associated with the Ethernet adapter you are using and select the Properties option 3 In the Components checked are used by this connection box highlight Internet Protocol TCP IP and click the Properties button Make sure that Obtain an IP address automatic...

Page 45: ...you get a reply the computer is connected to the Router If you do NOT get a reply try the ping command from a different computer to verify that your original computer is not the cause of the problem E In the command prompt type ping www linksys com and press the Enter key If you get a reply the computer is connected to the Internet If you cannot open a webpage try the ping command from a different...

Page 46: ...IPsec passthrough and or PPTP passthrough 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 as protocol 51 are incompatible ...

Page 47: ... For example if the web server s Ethernet adapter IP address is 192 168 15 100 you would enter 100 in the field provided Check Appendix C Finding the MAC Address and IP Address for Your Ethernet Adapter for details on getting an IP address F Check the Enable option for the port services you want to use Consider the examples below When you have completed the configuration click the Save Settings bu...

Page 48: ...ing difficulties getting any Internet game server or application to function properly consider exposing one PC to the Internet using DeMilitarized Zone DMZ hosting This option is available when an application requires too many ports or when you are not sure which port services to use Make sure you disable all the forwarding entries if you want to successfully use DMZ hosting since forwarding has p...

Page 49: ...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 any proxy settings and that the browser you use is set to connect directly to th...

Page 50: ...nnection is lost again follow steps E and F to re establish connection 14 I can t access my email web or VPN or I am getting corrupted data from the Internet The Maximum Transmission Unit MTU setting may need to be adjusted By default the MTU is set at 1500 For most DSL users it is strongly recommended to use MTU 1492 If you are having some difficulties perform the following steps A Open the web b...

Page 51: ...red correctly but still not working check the Router Ensure that it is connected and powered on Connect to it and check its settings If you cannot connect to it check the LAN and power connections If the Router is configured correctly check your Internet connection DSL cable modem etc to see if it is working correctly You can remove the Router to verify a direct connection Manually configure the T...

Page 52: ...h the following fix click ICQ menu preference connections tab and check I am behind a firewall or proxy Then set the firewall time out to 80 seconds in the firewall setting The Internet user can then send a file to a user behind the Router I set up an Unreal Tournament Server but others on the LAN cannot join What do I need to do If you have a dedicated Unreal Tournament server running you need to...

Page 53: ... a Macintosh environment Yes but the Router s setup pages are accessible only through Internet Explorer 5 0 or Netscape Navigator 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...

Page 54: ...uter must work in conjunction with a cable or DSL modem Which modems are compatible with the Router The Router is compatible with virtually any cable or DSL modem that supports Ethernet What is the maximum number of VPN sessions allowed by the Router The maximum number depends on many factors At least one IPSec session will work through the Router however simultaneous IPSec sessions may be possibl...

Page 55: ...ld enter winipcfg Then press the Enter key or the OK button 2 When the IP Configuration screen appears select the Ethernet adapter you have connected to the Router via a CAT 5 Ethernet network cable 3 Write down the Adapter Address as shown on your computer screen This is the MAC address for your Ethernet adapter and is shown as a series of numbers and letters The MAC address Adapter Address is wh...

Page 56: ... adapter s IP address as 192 168 1 100 Your computer may show something different For the Router s Web based Utility You can use MAC or IP addresses to designate computers for each Internet Access Policy you create To specify a computer enter its IP address or 12 digit MAC address For MAC address cloning enter the 12 digit MAC address in the User Defined Entry fields two digits per field For more ...

Page 57: ...instructions or protocol all PCs follow to communicate over a wired or wireless network Your PCs will not be able to utilize networking without having TCP IP enabled Windows Help provides complete instructions on enabling TCP IP Shared Resources If you wish to share printers folders or files over your network Windows Help provides complete instructions on utilizing shared resources Network Neighbo...

Page 58: ...teract with all the information on the World Wide Web Buffer A shared or assigned memory area that is used to support and coordinate different computing and networking activities so one isn t held up by the other Byte A unit of data that is usually eight bits long Cable Modem A device that connects a computer to the cable television network which in turn connects to the Internet CSMA CA Carrier Se...

Page 59: ...Traffic Indication Message A message included in data packets that can increase wireless efficiency Dynamic IP Address A temporary IP address assigned by a DHCP server Encryption Encoding data transmitted in a network Ethernet A networking protocol that specifies how data is placed on and retrieved from a common transmission medium Finger A program that tells you the name associated with an e mail...

Page 60: ...transmissions ISP Internet Service Provider A company that provides access to the Internet LAN The computers and networking products that make up your local network MAC Media Access Control Address The unique address that a manufacturer assigns to each networking device Mbps MegaBits Per Second One million bits per second a unit of measurement for data transmission mIRC An Internet Relay Chat prog...

Page 61: ...Ethernet connector that holds up to eight wires Router A networking device that connects multiple networks together RTS Request To Send A networking method of coordinating large packets through the RTS Threshold setting Server Any computer whose function in a network is to provide user access to files printing communications and other services SMTP Simple Mail Transfer Protocol The standard e mail...

Page 62: ...sion of the TCP IP FTP protocol that has no directory or password capability Throughput The amount of data moved successfully from one node to another in a given time period Topology The physical layout of a network TX Rate Transmission Rate UDP User Datagram Protocol A network protocol for transmitting data that does not require acknowledgement from the recipient of the data that is sent Upgrade ...

Page 63: ... One Reset Button Cabling Type RJ 45 Ethernet Category 5 LEDs Power Ethernet 1 4 Internet UPnP able cert Able Network Protocols TCP IP NetBEUI IPX SPX Dimensions 7 32 x 1 89 x 6 10 W x H x D 186 mm x 48 mm x 155 mm Unit Weight 13 33 oz 0 38 kg Power External 12V DC Certifications FCC Operating Temp 0ºC to 40ºC 32ºF to 104ºF Storage Temp 20ºC to 60ºC 4ºF to 140ºF Operating Humidity 10 to 85 Non Con...

Page 64: ...ND WARRANTIES INCLUDING ANY IMPLIED WARRANTY OF NON INFRINGEMENT ARE DISCLAIMED Some jurisdictions do not allow limitations on how long an implied warranty lasts so the above limitation may not apply to You This warranty gives You specific legal rights and You may also have other rights which vary by jurisdiction This warranty does not apply if the Product a has been altered except by Linksys b ha...

Page 65: ...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 ...

Page 66: ... by EU Directive 2002 96 EC on Waste Electric and Electronic Equipment WEEE This document contains important information for users with regards to the proper disposal and recycling of Linksys products Consumers are required to comply with this notice for all electronic products bearing the following symbol ...

Page 67: ...61 Appendix G Regulatory Information Wired Broadband Router ...

Page 68: ...62 Appendix G Regulatory Information Wired Broadband Router ...

Page 69: ...63 Appendix G Regulatory Information Wired Broadband Router ...

Page 70: ...64 Appendix G Regulatory Information Wired Broadband Router For more information visit www linksys com ...

Page 71: ...ing with Linksys products Give our advice line a call at 800 546 5797 LINKSYS Or fax your request in to 949 823 3002 If you experience problems with any Linksys product you can call us at 800 326 7114 Don t wish to call You can e mail us at support linksys com If any Linksys product proves defective during its warranty period you can call the Linksys Return Merchandise Authorization department for...

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