Cisco Linksys WRT55AG Dual-Band Wireless A+G Broadband Router User Manual WRT55AG ug Rev NC

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Instant Wireless®SeriesDual-Band WirelessA+G Broadband RouterUse this guide to install:WRT55AGUser Guide

Instant Wireless®Series Dual-Band Wireless A+G Broadband Router Table of ContentsChapter 1: Introduction 1The Dual-Band Wireless A+G Broadband Router 1Features 2The Router’s Functions 2IP Addresses 3Router Setup Overview 4Chapter 2: Getting to Know the Dual-BandWireless A+G Broadband Router 6The Router’s Back Panel 6The Router’s Front Panel 7Chapter 3: Connect the Router 10Overview 10Wired Connection to a PC 10Wireless Connection to a PC 12Chapter 4: Configure the PCs 13Overview 13Configuring Windows 98 and Millennium PCs 14Configuring Windows 2000 PCs 16Configuring Windows XP PCs 18Chapter 5: Setting Up the Dual-BandWireless A+G Broadband Router 20Chapter 6: Configure the Router’s BasicSettings with the Web-based Utility 28Chapter 7: The Router’s Web-based Utility 33Overview 33How to Access the Web-based Utility 33Setup 34Security 44System 46DHCP 50SNMP 52Status 53Note: Combinations of power levels and antennas resulting in a radiated power level ofabove 100 mW equivalent isotropic radiated power (EIRP) are considered as not com-pliant with the above mentioned directive and are not allowed for use within the Europeancommunity and countries that have adopted the European R&TTE directive 1999/5/ECand/or the CEPT recommendation Rec 70.03. For more details on legal combinations of power levels and antennas, contact LinksysCorporate Compliance.• Linksys Group vakuuttaa täten että Instant Wireless Dual-Band A+G BroadbandRouter tyyppinen laite on direktiivin 1999/5/EY, direktiivin 89/336/EEC ja direktiivin73/23/EEC oleellisten vaatimusten ja sitä koskevien näiden direktiivien muiden ehto-jen mukainen.• Linksys Group déclare que la Instant Wireless Dual-Band A+G Broadband Routerest conforme aux conditions essentielles et aux dispositions relatives à la directive1999/5/EC, la directive 89/336/EEC, et à la directive 73/23/EEC.• Belgique B L'utilisation en extérieur est autorisé sur le canal 11 (2462 MHz), 12 (2467MHz), et 13 (2472 MHz). Dans le cas d'une utilisation privée, à l'extérieur d'un bâti-ment, au-dessus d'un espace public, aucun enregistrement n'est nécessaire pourune distance de moins de 300m. Pour une distance supérieure à 300m un enreg-istrement auprès de l'IBPT est requise. Pour une utilisation publique à l'extérieur debâtiments, une licence de l'IBPT est requise. Pour les enregistrements et licences,veuillez contacter l'IBPT.• France F: 2.4 GHz Bande : les canaux 10, 11, 12, 13 (2457, 2462, 2467, et 2472 MHz respec-tivement) sont complétement libres d'utilisation en France (en utilisation intérieur).Pour ce qui est des autres canaux, ils peuvent être soumis à autorisation selon ledépartment. L'utilisation en extérieur est soumis à autorisation préalable et trèsrestreint. 5 GHz Bande: Conformément aux décisions de la CEPT, l'utilisation des fréquencesde la bande 5150 MHz - 5350 MHz est autorisée à l'intérieur des bâtiments avec unepuissance maximale de 200 mW, et interdite en extérieur. La bande 5470 MHz - 5725MHz n'est pas ouverte aujourd'hui. Vous pouvez contacter l'Autorité de Régulation des Télécommunications(http://www.art-telecom.fr) pour de plus amples renseignements.2.4 GHz Band: only channels 10, 11, 12, 13 (2457, 2462, 2467, and 2472 MHzrespectively) may be used freely in France for indoor use. License required for out-door installations.5 GHz Band: frequencies in the 5150 MHz - 5350 MHz band may be used indoorwith maximum power of 200 mW. Their use is forbidden outdoors. The 5470 MHz -5725 MHz band is not currently open.Please contact ART (http://www.art-telecom.fr) for procedure to follow.• Deutschland D: Anmeldung im Outdoor-Bereich notwending, aber nicht genehmi-gungspflichtig. Bitte mit Händler die Vorgehensweise abstimmen.• Germany D: License required for outdoor installations. Check with reseller for proce-dure to follow.• Italia I: E' necessaria la concessione ministeriale anche per l'uso interno. Verificarecon i rivenditori la procedura da seguire. L'uso per installazione in esterni non e' per-messa.• Italy I: License required for indoor use. Use with outdoor installations not allowed.• The Netherlands NL License required for outdoor installations. Check with reseller forprocedure to follow.• Nederlands NL Licentie verplicht voor gebruik met buitenantennes. Neem contact opmet verkoper voor juiste procedure.

Dual-Band Wireless A+G Broadband Router Chapter 1: IntroductionThe Dual-Band Wireless A+G Broadband Router is like four devices in onebox! The Router function lets you securely share one high-speed Internet con-nection among your entire network, while the 4-port full duplex 10/100 Switchjump-starts your wired-Ethernet network. Connect four PCs directly, or daisy-chain out to more hubs and switches to create as big a network as you need.The Dual-Band Wireless A+G Broadband Router also contains two WirelessAccess Points, supporting all three wireless networking specifications. Thefirst Access Point uses the 2.4GHz radio band, supporting both the popular andinexpensive Wireless-B (802.11b) standard at 11Mbps, and the new, almostfive times faster, Wireless-G (draft 802.11g) at 54Mbps. The second AccessPoint radio operates in the 5GHz band, and supports Wireless-A (802.11a) net-working, also at 54Mbps. Since the two radios operate in different bands, theycan work simultaneously, blanketing your wireless zone with bandwidth.To protect your data and privacy, the Dual-Band Wireless A+G BroadbandRouter can encrypt all wireless transmissions. The MAC Address filter letsyou decide exactly who has access to your wireless network. The Router alsoserves as a DHCP Server, has NAT technology to protect against Internetintruders, DMZ capability, supports VPN pass-through, and can be configuredto filter internal users' access to the Internet. Configuration is a snap with theweb browser-based configuration utility.With the Linksys Dual-Band Wireless A+G Broadband Router at the center ofyour home or office network, you can share a high-speed Internet connection,files, printers, and multi-player games with the flexibility, speed, and securityyou need!1The Dual-Band Wireless A+G Broadband RouterInstant Wireless®SeriesHelp 55Advanced Tabs 56Advanced Wireless 56Internet Filter 60Port Forwarding 63Routing 66DDNS 68Appendix A: Troubleshooting 70Common Problems and Solutions 70Frequently Asked Questions 81Appendix B: How to Ping Your ISP’s E-mail &Web Addresses 89Appendix C: Configuring Wireless Security 92Background 92WEP Encryption 93Appendix D: Finding the MAC Address and IPAddress for Your Ethernet Adapter 94Appendix E: Glossary 97Appendix F: Specifications 113Environmental 114Appendix G: Warranty Information 115Appendix H: Contact Information 116

Dual-Band Wireless A+G Broadband Router 3Remember that the Router’s ports connect to two sides. The 10/100 LAN portsconnect to the LAN, and the Internet port connects to the Internet. The LANports transmit data at 10 Mbps or 100 Mbps, and the broadband port, orInternet port, transmits data at 10/100 Mbps. Your wireless devices connect tothe Router through either 802.11a, 802.11b, or draft-802.11g wireless technol-ogy.What’s an IP Address?IP stands for Internet Protocol. Every device on an IP-based network, includingPCs, print servers, and routers, requires an IP address to identify its “location,” oraddress, on the network. This applies to both the Internet and LAN connections.There are two ways of assigning an IP address to your network devices. You canassign static IP addresses or use the Router to assign IP addresses dynamically.Static IP AddressesA static IP address is a fixed IP address that you assign manually to a PC orother device on the network. Since a static IP address remains valid until youdisable it, static IP addressing ensures that the device assigned it will alwayshave that same IP address until you change it. Static IP addresses must beunique and are commonly used with network devices such as server PCs orprint servers.If you use the Router to share your cable or DSL Internet connection, contactyour ISP to find out if they have assigned a static IP address to your account.If so, you will need that static IP address when configuring the Router. You canget that information from your ISP.Dynamic IP AddressesA 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 certaintime period, they expire and may change. If a PC logs onto the network (or theInternet) and its dynamic IP address has expired, the DHCP server will auto-matically assign it a new dynamic IP address.IP AddressesNote: Since the Router uses NAT technology, the only IP address thatcan be seen from the Internet for your network is the Router’s InternetIP address.However, even this Internet IP address can be blocked, so that theRouter and network seem invisible to the Internet—see the BlockWAN Requests description under Filters in “Chapter 7: The Router’sWeb-based Utility.”Instant Wireless®Series2• Dual-band, tri-standard Access Point communicates with Wireless-A(802.11a), Wireless-B (802.11b), and Wireless-G (draft 802.11g) wirelessnetworks• Protect your wireless investment while preparing your infrastructure for thefuture• Built-in 4-port Switch jump-starts your wired network, while the Routerfunctionality securely shares your high-speed Internet connection withwired and wireless computers• Advanced Security: Wireless data encryption (WEP), VPN pass-through,Internet access control and Wireless filters • Performance Investment Protection: Compatibility with Wireless-A(802.11a), Wireless-B (802.11b) and Wireless-G Standards• Built-in 4-Port 10/100 Switch Supports Wired Ethernet Clients• All Ethernet Ports Support Auto-MDI/MDI-X -- No Need for CrossoverCables or Uplink Port• Wireless Security with up to 152-bit WEP Encryption• Enhanced Security Management Functions: Port Filtering, MAC and IPAddress Filtering, DMZ Hosting, and NAT Technology• Access Your Corporate Network Remotely through Virtual PrivateNetworking (VPN) -- Supports IPSec and PPTP Pass-Through• Easily Configurable through a Web Browser -- Locally and over the Internet• DDNS and DHCP Server Capability to Assign IP Addresses Automatically• Supports Static and Dynamic Routing (RIP1 and 2)Simply put, a router is a network device that connects two networks together. Awireless router connects three networks.In this instance, the Router connects your wired network and wireless network,or the group of PCs in your home or office, to the Internet. The Router process-es and regulates the data that travels between these networks.The Router’s NAT feature protects your network of PCs so users on the public,Internet side cannot “see” your PCs. This is how your network remains private.The Router protects your network by inspecting every packet coming inthrough the Internet port before delivery to the appropriate PC on your net-work. The Router inspects Internet port services like the web server, ftp server,or other Internet applications, and, if allowed, it will forward the packet to theappropriate PC on the LAN side.The Router’s FunctionsFeatures

Dual-Band Wireless A+G Broadband Router •Chapter 5: Setting up the Dual-Band Wireless A+G Broadband RouterThis chapter will walk you through the Setup Wizard included on the SetupCD-ROM.•Chapter 6: Configuring the Router’s Basic Settings with the Web-basedUtilityWhile you should always use the Setup Wizard when setting up the Router,more advanced users may wish to do this through the Web-based Utility. Thischapter shows you how to configure the Router’s basic settings this way.•Chapter 7: The Router’s Web-based UtilityThe Web-based Utility controls all of the Router’s functions and settings. Thischapter shows you how to use this Utility.When you’re finished with these basic steps, you will be ready to connect to theInternet. You can also modify the Router’s settings further; for example, youcan adjust security features and other settings to enable online gaming (see“Chapter 7: The Router’s Web-based Utility”). 5Instant Wireless®Series4Figure 1-1Cable or DSL ModemRouterPC withEthernetAdapterNotebook withWireless AdapterNotebook withWireless AdapterDHCP (Dynamic Host Configuration Protocol) ServersPCs and other network devices using dynamic IP addressing are assigned a newIP address by a DHCP server. The PC or network device obtaining an IPaddress is called the DHCP client. DHCP frees you from having to assign IPaddresses manually every time a new user is added to your network. A DHCP server can either be a designated PC on the network or another net-work device, such as the Router. By default, the Router’s DHCP Server func-tion is enabled.If you already have a DHCP server running on your network, you must disableone of the two DHCP servers. If you run more than one DHCP server on yournetwork, you will experience network errors, such as conflicting IP addresses.To disable DHCP on the Router, see the DHCP section in “Chapter 7: TheRouter’s Web-based Utility.” This User Guide covers the steps for setting up a network with the Router. Aftergoing through “Chapter 2: Getting to Know the Dual-Band Wireless A+GBroadband Router,” most users will only need to use the following chapters: •Chapter 3: Connect the RouterThis chapter instructs you on how to connect a cable or DSL modem to theRouter and connect your PC(s) to the Router.•Chapter 4: Configure the PCsThis chapter instructs you on how to configure your PCs to be DHCP clients,if you have previously set static IP addresses on your PCs. Router Setup OverviewNote: Even if you assign a static IP address to a PC, other PCs canstill use DHCP’s dynamic IP addressing, as long as the static IPaddress is not within the DHCP range of the LAN IP Addresses.If the dynamic IP addressing fails to provide a dynamic IP address,refer to “Appendix A: Troubleshooting.”

Dual-Band Wireless A+G Broadband Router 7Instant Wireless®Series6The Router’s LEDs, shown in Figure 2-2, display information about theRouter’s status.Power Green. The Power LED lights up when the Router is poweredon.Diag Red. The Diag LED lights up when the Router goes throughits self-diagnosis mode during every boot-up. It will turn offupon successful completion of the diagnosis. If this LED stays on for one minute or longer, see “AppendixA: Troubleshooting.”The Router’s Front PanelFigure 2-2The Reset ButtonThe Reset button can be used in one of two ways: 1. If the Router is having problems connecting to the Internet, press the Resetbutton for just a moment with a paper clip or a pencil tip. This clears up anyjammed connections, and is similar to pressing the Reset button on your PCto reboot it.This will reboot the Router while keeping all of the Router’s settings.2. If you are experiencing extreme problems with the Router and have tried allother troubleshooting measures, press the Reset Button and hold it down for10 seconds.This will restore factory defaults and clear all of the Router’s settings,including settings such as a new password or wireless settings.Chapter 2: Getting to Know theDual-Band Wireless A+GBroadband RouterThe Router’s ports, shown in Figure 2-1, are located on the Router’s back panel.Internet The Internet port is where you connect your cable or DSLmodem through an Ethernet network cable. Your modemconnection will not work from any other port. Ports 1-4 These four LAN (Local Area Network) ports connect to net-work devices, such as PCs, print servers, and networkattached storage (NAS). Each of the ports will auto-detectwhether a straight-through or crossover cable is plugged intoit, so there is no need for an uplink port. Any one of the fourports can serve as an uplink port to other network devices.Power The Power port is where you will connect the power adapter. The Router’s Back PanelFigure 2-1

Dual-Band Wireless A+G Broadband Router The Internet IndicatorsLink/Act Green. The Link/Act LED lights up when a successful con-nection is made between the Router and your cable or DSLmodem (the Internet). The Link/Act LED flickers when theRouter is sending or receiving data over the Internet port.100 Orange. The 100 LED lights up when a successful 100Mbpsconnection is made through the corresponding port. If this LED does not light up, then your connection speed is10Mbps.Proceed to “Chapter 3: Connect the Router.”9Instant Wireless®Series8The 802.11a WLAN IndicatorsAct Green. When the Act LED flickers, the 802.11a wireless net-work is active.Link Green. When the Link LED is continuously lit, the 802.11awireless network is available. The 802.11b WLAN IndicatorsAct Green. When the Act LED flickers, the 802.11b wireless net-work is active.Link Green. When the Link LED is continuously lit, the 802.11bwireless network is available. The LAN IndicatorsLink/Act Green. The Link/Act LED serves two purposes. If the LEDis continuously lit, the Router is successfully connected to adevice through the corresponding port. If the LED is flicker-ing, the Router is actively sending or receiving data over thatport. Full/Col Green. The Full/Col LED also serves two purposes. If thisLED is lit up solidly, the connection made through the corre-sponding port is running in Full Duplex mode. If the LEDflickers, the connection is experiencing collisions (when twoPCs send data at the same time). Infrequent collisions arenormal. 100 Orange. The 100 LED lights up when a successful 100Mbpsconnection is made through the corresponding port. If this LED does not light up, then your connection speed is10Mbps.

Dual-Band Wireless A+G Broadband Router 11Instant Wireless®Series103. Connect a different Ethernet networkcable from your cable or DSL modemto the Internet port on the Router’s rearpanel. This is the only port that willwork for your modem connection. 4. Power on the cable or DSL modem. 5. Connect the power adapter to theRouter’s Power port, and then plug thepower adapter into a power outlet. The Power LED on the front panel will light up green as soon as the poweradapter is connected properly.The Diag LED will light up red for a few seconds. It will turn off when the self-test is complete. If this LED stays on for one minute or longer, see “AppendixA: Troubleshooting.”6. Power on one of your PCs.Note: You should always plugthe Router’s power adapter intoa power strip with surge pro-tection.Figure 3-2Figure 3-3Have you checked that the Link/Act LEDs for all your LAN con-nections and the Link LED for your Internet connection light up? If all of your Link LEDs are not lighting up, make sure that all yourcables are securely plugged in, and that all of your hardware is pow-ered on properly. Verify that the modem is plugged into the Internetport on the Router.Chapter 3: Connect the Router 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 thatthe Router assigns them (if applicable), and you will also have to configure theRouter with setting(s) provided by your Internet Service Provider (ISP).The installation technician from your ISP should have left the setup informa-tion for your modem with you after installing your broadband connection. Ifnot, you can call your ISP to request that data. Once you have the setup information you need for your specific type of Internetconnection, you can begin installation and setup of the Router.If you want to use a PC with an Ethernet adapter to configure the Router, go to“Wired Connection to a PC and Boot-Up.” If you want to use a PC with a wire-less adapter to configure the Router, go to “Wireless Connection to a PC andBoot-Up.”1. Before you begin, make sure that all ofyour network’s hardware is poweredoff, including the Router, PCs, andcable or DSL modem.2. Connect one end of an Ethernet net-work cable to one of the LAN ports(labeled 1-4) on the back of theRouter, and the other end to anEthernet port on a PC. Repeat this step to connect more PCs, a switch, or other network devices tothe Router.OverviewWired Connection to a PCFigure 3-1Note: These directions on connecting the Router are provided onlyto help when you are making the connections. If you are using theSetup Wizard, make your connections only when the Wizard asks.

Dual-Band Wireless A+G Broadband Router Chapter 4: Configure the PCsThe instructions in this chapter will help you configure each of your comput-ers to be able to communicate with the Router.To do this, you need to configure your PC’s network settings to obtain an IP (orTCP/IP) address automatically, so your PC can function as a DHCP client.Computers use IP addresses to communicate with the Router and each otheracross a network, such as the Internet. First, find out which Windows operating system your computer is running. Youcan find out by clicking the Start button. Read the side panel of the Start menuto find out which operating system your PC is running.You may need to do this for each computer you are connecting to the Router.The next few pages tell you, step by step, how to configure your network set-tings based on the type of Windows operating system you are using. Make surethat an Ethernet or wireless adapter (also known as a network adapter) has beensuccessfully installed in each PC you will configure. Once you’ve configuredyour computers, setup the Router, either by using the Setup Wizard as shownin “Chapter 5: Setting Up the Dual-Band Wireless A+G Broadband Router” orby using the Web-based Utility as shown in “Chapter 6: Configuring theRouter’s Basic Settings with the Web-based Utility”. 13Instant Wireless®Series12Important: By default Windows 98, 2000, Me, and XP hasTCP/IP installed and set to obtain an IP address automatically. If your PC does not have TCP/IP installed, click Start and thenHelp. Search for the keyword TCP/IP. Then follow the instruc-tions to install TCP/IP.OverviewIf you want to use a wireless connection to access the Router, follow theseinstructions:1. Before you begin, make sure that all of your network’s hardware is poweredoff, including the Router, PCs, and cable or DSL modem.2. Connect an Ethernet network cablefrom your cable or DSL modem to theInternet port on the Router’s rearpanel, as shown in Figure 3-4. This isthe only port that will work for yourmodem connection. 3. Power on the cable or DSL modem. 4. Connect the power adapter to the Power port, and then plug the poweradapter into a power outlet. •The Power LED on the front panel will light up green as soon as the poweradapter is connected properly.•The Diag LED will light up red for a few seconds and turn off when the self-test is complete. If this LED stays on for one minute or longer, see “AppendixA: Troubleshooting.”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 thePC’s wireless adapter has its SSID set to linksys-a or linksys-g (which arethe Router’s default SSID settings, depending upon the wireless devices youare using), and its WEP encryption is disabled. After you have accessed theRouter, you can change the Router and this PC’s adapter settings to matchthe your usual network settings.The Router’s hardware installation is now complete.Go to “Chapter 4: Configure the PCs.”Wireless Connection to a PCNote: You should always plug the Router’s power adapter into a powerstrip with surge protection.Figure 3-4Note: You should always change the SSID from its default, linksys,and enable WEP encryption.

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