Related Manuals for Linksys WRT51AB
Summary of Contents for Linksys WRT51AB
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Page 1: Broadband Router
Instant Wireless ® Series Dual-Band Wireless A+B Broadband Router Use this guide to install: WRT51AB User Guide... - Page 2 Linksys reserves the right to revise or update its prod- ucts, software, or documentation without obligation to notify any individual or entity.
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Page 3: Table Of Contents
73/23/EEC oleellisten vaatimusten ja sitä koskevien näiden direktiivien muiden ehto- jen mukainen. • Linksys Group déclare que la Instant Wireless Dual-Band A+B Broadband Router est conforme aux conditions essentielles et aux dispositions relatives à la directive 1999/5/EC, la directive 89/336/EEC, et à la directive 73/23/EEC. -
Page 4: Chapter 1: Introduction
Internet. Configuration is a snap with the web browser-based configuration utility. With the Linksys Dual-Band Wireless A+B Broadband Router at the center of your home or office network, you can share a high-speed Internet connection,... -
Page 5: Features
Features • Compatibility with 802.11a (5GHz) and 802.11b (2.4GHz) Standards • Built-in, 4-Port, 10/100 Switch Supports Wired Ethernet Clients • All Ethernet Ports Support Auto-MDI/MDI-X—No Need for Crossover Cables • Unsurpassed Security Using 802.1x Authentication with up to 152-bit WEP Encryption •... -
Page 6: Router Setup Overview
Dynamic IP Addresses A dynamic IP address is automatically assigned to a device on the network, such as PCs and print servers. These IP addresses are called “dynamic” because they are only temporarily assigned to the PC or device. After a certain time period, they expire and may change. -
Page 7: Chapter 2: Getting To Know The Dual-Band Wireless A+B Broadband Router
Chapter 2: Getting to Know the Dual-Band Wireless A+B Broadband Router The Router’s Back Panel Figure 2-1 The Router’s ports are located on the Router’s back panel. Internet The Internet port is where you connect your cable or DSL modem through an Ethernet network cable. Your modem connection will not work from any other port. - Page 8 The 802.11a WLAN Indicators Green. When the Act LED flickers, the 802.11a wireless net- work is active. Link Green. When the Link LED is continuously lit, the 802.11a wireless network is available. The 802.11b WLAN Indicators Green. When the Act LED flickers, the 802.11b wireless net- work is active.
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Page 9: Chapter 3: Connect The Router
Chapter 3: Connect the Router Overview The Router’s setup consists of more than simply plugging hardware together. You will have to configure your networked PCs to accept the IP addresses that the Router assigns them (if applicable), and you will also have to configure the Router with setting(s) provided by your Internet Service Provider (ISP). -
Page 10: Wireless Connection To A Pc
4. Power on one of the PCs on your wireless network(s). 5. For initial access to the Router through a wireless connection, make sure the PC’s wireless adapter has its SSID set to linksys (the Router’s default set- ting), and its WEP encryption is disabled. After you have accessed the Router, you can change the Router and this PC’s adapter settings to match... -
Page 11: Configuring Windows 98 And Millennium Pcs
Configuring Windows 98 and Millennium PCs 1. Click the Start button. Select Settings and click the Control Panel icon. Double-click the Network icon. 2. On the Configuration tab, select the TCP/IP line for the applicable Ethernet adapter. Do not choose a TCP/IP entry whose name mentions DUN, PPPoE, VPN, or AOL. -
Page 12: Configuring Windows 2000 Pcs
Configuring Windows 2000 PCs 1. Click the Start button. Select Settings and click the Control Panel icon. Double-click the Network and Dial-up Connections icon. 2. Select the Local Area Connection icon for the applicable Ethernet adapter (usually it is the first Local Area Connection listed). Double-click the Local Area Connection. -
Page 13: Configuring Windows Xp Pcs
Configuring Windows XP PCs 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. -
Page 14: Chapter 5: Configure The Router's Basic Settings
Chapter 5: Configure the Router’s Basic Settings This chapter will show you how to configure the Router to function in your network and gain access to the Internet through your Internet Service Provider (ISP). Detailed description of the Router’s web-based utility can be found in “Chapter 6: The Router’s Web-based Utility.”... - Page 15 Automatic Configuration - DHCP If you are connecting through DHCP or a dynamic IP address from your ISP, perform these steps: A. Keep the default setting, Automatic Configuration - DHCP, as the Configuration Type. B. Click the Apply button to save the set- ting, or click the Cancel button to clear the setting and start over.
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Page 16: Chapter 6: The Router's Web-Based Utility
7. Restart your computers so that they can obtain the Router’s new settings. If you need more details or advanced setting information, please refer to “Chapter 6: The Router’s Web-based Utility” or the Linksys support web- site at support.linksys.com. Test the setup by opening your web browser from any computer and enter- ing http://www.linksys.com/registration. -
Page 17: Setup
Firmware Version This shows the version and date of the firmware you are using. Future versions of the Router’s firmware will be posted and available for download on the Linksys website at www.linksys.com. Host Name and Domain Name These fields allow you to supply a host and domain name for the Router. - Page 18 Static IP If you are required to use a permanent IP address to connect to the Internet, then select Static IP. Figure 6-6 Specify Internet IP Address This is the Router’s IP address, when seen from the WAN, or the Internet. Your ISP will provide you with the IP Address you need to specify here.
- Page 19 Keep Alive Option: Redial Period If you select this option, the Router will periodically check your Internet connection. If you are disconnected, then the Router will automatically re-establish your connection. To use this option, click the radio button next to Keep Alive. In the Redial Period field, you specify how often you want the Router to check the Internet connection.
- Page 20 Turbo Mode must be enabled on both the Router and the wireless PCs to function. Turbo Mode is not compatible with Windows XP and functions only with Linksys 5GHz, 802.11a wireless adapters. Select Enable to increase the speed of your wireless transmissions up to 72 Mbps.
- Page 21 Make sure this setting is the same for all points in your wireless network. For added security, you should change the default SSID (linksys) to a unique name. Channel Select the appropriate channel from the list provided to corre- spond with your network settings, between 1 and 11 (in North America).
- Page 22 16 alphanumeric characters. This Passphrase function is compatible with Linksys wireless products only. [If you want to communicate with non-Linksys wireless products, enter the WEP key(s) manually on the non-Linksys wireless products.] After you enter the Passphrase, click the Generate button to create WEP keys.
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Page 23: Password
Password The Password screen allows you to change the Router’s password. You should change the factory default password, which is admin, to your own as soon as possible All users who try to access the Router’s web-based utility will be prompted for the Router’s password. - Page 24 Host Name The Host Name is the name of the Router. This entry is necessary for some ISPs. Domain Name The Domain Name is the name of the Router's domain. This entry is necessary for some ISPs. Firmware Version The version number of the firmware currently installed is displayed here.
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Page 25: Dhcp
DHCP The DHCP screen allows you to configure the settings for the Router’s Dynamic Host Configuration Protocol (DHCP) server function. The Router can be used as a DHCP server for your network. A DHCP server automatically assigns an IP address to each computer on your network. Figure 6-15 If you choose to enable the Router’s DHCP server option, you must configure all of your network PCs to connect to a DHCP server (the Router), and make sure... -
Page 26: Log
Help screen. Firmware Version The version number of the firmware currently installed is displayed here. Firmware should only be upgraded if you are experiencing problems with the Router. Visit www.linksys.com to find out if there is updated firmware. Linksys Website www.linksys.com, provided you are connected to the Internet. -
Page 27: Advanced Tabs
(To learn about any new firmware with new features, visit www.linksys.com.) Loading new firmware onto the Router does not always enhance the speed or the quality of your connection. -
Page 28: Advanced Wireless
Advanced Wireless The Advanced Wireless screen allows you to customize data transmission set- tings and access the 802.1x Configuration screen. In most cases, the advanced wireless settings on this screen should remain at their default values. Figure 6-19 5GHz, 802.11a Beacon Interval The Beacon Interval value indicates the frequency interval of the beacon. - Page 29 2.4GHz, 802.11b Beacon Interval The Beacon Interval value indicates the frequency interval of the beacon. Enter a value between 20 and 1000. A beacon is a packet broadcast by the Router to synchronize the wireless network. The default value is 100. RTS Threshold Should you encounter inconsistent data flow, only minor reduction of the default value, 2346, is recommended.
- Page 30 Important: The Router’s 802.1x feature works with Windows XP. It may also work with other Windows operating systems, depend- ing on the specifics of your PC’s operating system and the 802.1x client software being used. RADIUS Server The Router’s 802.1x feature works with a RADIUS server. It may also work with other types of authentication servers, depending on the specifics of each authentication server.
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Page 31: Filters
Dynamic WEP Key Length When 2.4GHz, 802.11b wireless clients are using certificate-based authentication (EAP-TLS or EAP-TTLS), dynamic WEP keys are automatically generated. Select the length of the Dynamic Key (64 or 128-bit) from the drop-down menu. Key Renewal Timeout If you are using dynamic WEP keys (available only for EAP-TLS or EAP-TTLS authentication), enter the number of seconds that will elapse before the Dynamic Key automatically changes. - Page 32 Private IP Filter To set up a filter using IP addresses, select Enable. Then select Only Allow Internet Access for the IP Addresses on the List or Only Deny Internet Access for the IP Addresses on the List. Click the Edit IP Filter List button. Enter the appropriate IP addresses into the IP address fields (see Figure 6-22).
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Page 33: Port Forwarding
Port Forwarding The Port Forwarding screen sets up public services on your network, such as web servers, ftp servers, e-mail servers, or other specialized Internet applica- tions. (Specialized Internet applications are any applications that use Internet access to perform functions such as videoconferencing or online gaming. Some Internet applications may not require any forwarding.) Figure 6-24 Note: Any PC whose port is being forwarded should have its DHCP... -
Page 34: Routing
Routing On the Routing screen, you can set the routing mode of the Router. Gateway mode is recommended for most users. Figure 6-25 Note: The Routing screen and available features will vary depending on which mode you select. To set up routing: 1. -
Page 35: Dmz Host
Show Routing Table Click the Show Routing Table button to view all of the valid dynamic and static route entries in use (see Figure 6-26). The Destination LAN IP address, Subnet Mask, Gateway, and Interface information are dis- played for each entry. Click the Refresh button to display the most up-to-date data. -
Page 36: Mac Address Clone
MAC Address Clone On the MAC Address Clone screen, you can clone the MAC address of your PC’s network adapter onto the Router. Figure 6-28 A MAC address is a 12-digit code assigned to a unique piece of hardware for identification, like a social security number. -
Page 37: Appendix A: Troubleshooting
Router. Read the descrip- tions below to help solve your problems. 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. - Page 38 For 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. A.
- Page 39 IPSec server. Refer to “Problem #7, I need to set up online game hosting or use other Internet applications” for details. Check the Linksys website for more information at www.linksys.com. 6. I need to set up a server behind my Router.
- Page 40 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 work without doing any port forwarding or DMZ hosting. There may be cases when you want to host an online game or Internet application.
- Page 41 In order to upgrade the firmware with the latest features, you need to go to the Linksys website and download the latest firmware at www.linksys.com. Follow these steps: A. Go to the Linksys website at http://www.linksys.com and download the latest firmware. B. To upgrade the firmware, follow the steps in the Help section found in “Chapter 6: The Router’s Web-based Utility.”...
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Page 42: Frequently Asked Questions
15. I can’t access my e-mail, 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 recom- mended to use MTU 1492. - Page 43 Does the Router support any operating system other than Windows 95, Windows 98, Windows Millennium, Windows 2000, Windows NT, or Windows XP? Yes, but Linksys does not, at this time, provide technical support for setup, con- figuration or troubleshooting of any non-Windows operating systems.
- Page 44 your browser is set to connect directly and that any dial-up is disabled. Make sure that your browser is set to connect directly and that any dial-up is disabled. For Internet Explorer, click Tools, Internet Options, and then the Connection tab.
- Page 45 What IEEE 802.11b features are supported? The product supports the following IEEE 802.11b functions: • CSMA/CA plus Acknowledge protocol • Multi-Channel Roaming • Automatic Rate Selection • RTS/CTS feature • Fragmentation • Power Management What is ad-hoc mode? When a wireless network is set to ad-hoc mode, the wireless-equipped com- puters are configured to communicate directly with each other.
- Page 46 Overall, range will be a little less in a typical environment, and while higher speeds may be achieved with 802.11a, throughput degrades more quickly. (See Figure A-1.) If your questions are not addressed here, refer to the Linksys website, Figure A-1 www.linksys.com.
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Page 47: Appendix B: How To Ping Your Isp's E-Mail & Web Addresses
IP addresses, which are the true addresses on the Internet. For example, www.yahoo.com is 66.218.71.87 (this IP address may change). Type it into your web browser and you will wind up at the Linksys home page every time. There are servers that translate the URL to an IP address;... -
Page 48: Appendix C: Configuring Wireless Security
WEP encryption has been called 40-bit because it uses a 40-bit secret key along with a 24-bit Initialization Vector (40 + 24 = 64). Wireless vendors may use either name. Linksys uses the term “64-bit” when referring to this level of encryption. -
Page 49: Wep Encryption
Instant Wireless Series Dual-Band Wireless A+B Broadband Router ® In addition to enabling WEP, Linksys also recommends the following security implementations: • Change the SSID from the default “linksys” • Change the SSID on a regular basis • Change the WEP key regularly •... -
Page 50: Md5 Authentication For Windows Xp
Windows XP supports 802.1x with MD5 or TLS authentication. In this appen- dix, the following sections will discuss 802.1x configuration for PCs running Windows XP. If you are using MD5 authentication, proceed to “MD5 Authentication for Windows XP.” If you are using TLS authentication, go to the appropriate section, “Digital Certificate Installation”... - Page 51 4. Click the Wireless Networks tab. Select the wireless network you want to connect to, and click the Configure button. If you don’t see the wireless network you want, then click the Refresh button. Figure C-5 5. Make sure the box next to Data encryption (WEP enabled) is checked. Uncheck the box next to The key is provided for me automatically.
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Page 52: Digital Certificate Installation
8. Click the Wireless Network Connection icon located in your computer’s system tray. Figure C-9 9. Complete the User name and Password fields. Complete the Logon domain field if necessary. Then click the OK button. Figure C-10 10. Open your PC’s web browser and test your Internet connection. If you are unable to connect to the Internet, double-check the settings you configured through Windows XP and the Router’s web-based utility. - Page 53 3. Click the radio button next to Request a certificate, and then click the Next button. Figure C-13 4. Click the radio button next to User certificate request:, and make sure User Certificate is selected. Then click the Next button. Figure C-14 Instant Wireless Series...
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Page 54: Tls Authentication For Windows Xp
8. You will be informed when the certificate has been successfully installed. Then close your PC’s web browser. Figure C-18 Proceed to the next section, “TLS Authentication for Windows XP.” Instant Wireless Series Dual-Band Wireless A+B Broadband Router ® TLS Authentication for Windows XP 1. - Page 55 3. Click the Authentication tab. Make sure the box next to Enable network access control using IEEE 802.1X is checked. In the drop-down box next to EAP type, select Smart Card or other Certificate. Make sure the box next to Authenticate as computer when computer information is avail- able is checked.
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Page 56: Appendix D: Finding The Mac Address And Ip Address For Your Ethernet Adapter
7. Click the Wireless Network Connection icon located in your computer’s system tray. Figure C-25 8. If this is the first time you are using this 802.1x connection, you will be asked if you want to accept the wireless network connection. Click the OK button. - Page 57 3. Write down the Adapter Address as shown on your computer screen (see Figure E-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.
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Page 58: Appendix E: Glossary
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. 802.11a - One of the IEEE standards for wireless networking hardware. Products that adhere to a specific IEEE standard will work with each other, even if they are manufactured by different companies. - Page 59 on startup. These instructions search for the operating system, load it, and pass control to it. Bottleneck – A traffic slowdown that results when too many network nodes try to access a single node, often a server node, at once. Bridge - A device that interconnects different networks together.
- Page 60 DMZ - (DeMilitarized Zone) allows one IP address (or computer) to be exposed to the Internet. Some applications require multiple TCP/IP ports to be open. It is recommended that you set your computer with a static IP address if you want to use DMZ Hosting. DNS - The Domain Name System (DNS) is the way that Internet domain names are located and translated into Internet Protocol (IP) addresses.
- Page 61 (The term also implies the security policy that is used with the programs.) An enterprise with an intranet that allows its workers access to the wider Internet installs a firewall to prevent outsiders from accessing its own private data resources and for controlling what outside resources to which its own users have access.
- Page 62 than one is required) and sends it to the IP address that is obtained by looking up the domain name in the Uniform Resource Locator you requested or in the e-mail address you're sending a note to. At the other end, the recipient can see the IP address of the Web page requestor or the e-mail sender and can respond by sending another message using the IP address it received.
- Page 63 Passphrase - Used much like a password, a passphrase simplifies the WEP encryption process by automatically generating the WEP encryption keys for Linksys products. PC Card - A credit-card sized removable module that contains memory, I/O, or a hard disk.
- Page 64 Plug-and-Play - The ability of a computer system to configure expansion boards and other devices automatically without requiring the user to turn off the system during installation. POP3 (Post Office Protocol 3) - A standard mail server commonly used on the Internet.
- Page 65 hardware and/or software processes reporting activity in each network device (hub, router, bridge, etc.) to the workstation console used to oversee the net- work. The agents return information contained in a MIB (Management Information Base), which is a data structure that defines what is obtainable from the device and what can be controlled (turned off, on, etc.).
- Page 66 TX Rate – Transmission Rate. 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 keeping track of the individual units of data (called packets) that a message is divided into for effi- cient delivery over the network.
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Page 67: Appendix F: Specifications
Appendix F: Specifications Standards IEEE 802.3, IEEE 802.3u, IEEE 802.11a, IEEE 802.11b Ports Internet: One 10/100 RJ-45 Port for Cable/DSL Modem LAN: Four 10/100 RJ-45 Switched Ports One Power Port Button One Reset Button Cabling Type Category 5 Ethernet Network Cable or better Transmit Power 802.11a: 15 dBm... -
Page 68: Appendix G: Warranty Information
Dual-Band Wireless A+B Broadband Router ® Appendix H: Contact Information For help with the installation or operation of the Dual-Band Wireless A+B Broadband Router, contact Linksys Technical Support at one of the phone num- bers or Internet addresses below. Sales Information Technical Support... - Page 69 © Copyright 2002 Linksys, All Rights Reserved.