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Linksys WRT51AB Router Manual PDF (Setup & Configuration Guide)

Given below is full router user manual of Linksys WRT51AB router model. You can also download this manual in PDF Format to read later on your computer.

Product user manuals come handy in case you want to know all functionalities of your device, troubleshooting, fist time configuration & setup and in many other situations.

Page 1 / 69
Instant Wireless
®
Series
Dual-Band Wireless A+B
Broadband Router
Use this guide to install:
WRT51AB
User Guide
Page 2 / 69
FCC RF Radiation Exposure Statement
To comply with the FCC and ANSI C95.1 RF exposure limits, the antenna(s) for this
device must comply with the following:
1.
Access points with 2.4 GHz or 5 GHz integrated antenna must operate with a sepa-
ration distance of at least 20 cm from all persons using the cable provided and must
not be co-located or operating in conjunction with any other antenna or transmitter.
2.
The Access Point's co-located 2.4 GHz and 5 GHz integrated antennas support a
minimum separation distance of 10 cm (3.9 in.) and are compliant with the applica-
ble FCC RF exposure limit when transmitting simultaneously.
End-users must be provided with specific operations for satisfying RF exposure compli-
ance.
Note: Dual antennas used for diversity operation are not considered co-located.
Canadian Department of Communications Industry Canada (IC) Notice
This Class B digital apparatus complies with Canadian ICES-003 and RSS-210.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 et CNR-210
du Canada.
"To prevent radio interference to the licensed service, this device is intended to be oper-
ated indoors and away from windows to provide maximum shielding. Equipment (or its
transmit antenna) that is installed outdoors is subject to licensing."
" Pour empêcher que cet appareil cause du brouillage au service faisant l'objet d'une
licence, il doit être utilisé à l'intérieur et devrait être placé loin des fenêtres afin de fournir
un écran de blindage maximal. Si le matériel (ou son antenne d'émission) est installé à
l'extérieur, il doit faire l'objet d'une licence. "
EC DECLARATION OF CONFORMITY (EUROPE)
Linksys Group declares that the Instant Wireless
®
Series products included in the Instant
Wireless
®
Series conform to the specifications listed below, following the provisions of the
European R&TTE directive 1999/5/EC, EMC directive 89/336/EEC, and Low Voltage
directive 73/23/EEC:
For 11Mpbs, 2.4 GHz access points with 100 mW radios, the following standards were
applied:
•
ETS 300-826, 301 489-1 General EMC requirements for Radio equipment.
•
EN 609 50 Safety
•
ETS 300-328-2 Technical requirements for Radio equipment.
For 54 Mpbs, 5 GHz access points with 40 mW radios, the following standards were
applied:
•
ETS 301 489-1, 301 489-17 General EMC requirements for Radio equipment.
•
EN 609 50 Safety
•
ETS 301-893 Technical requirements for Radio equipment.
Caution: The frequencies used by 802.11a wireless LAN devices are not yet harmonized
within the European community, 802.11a products are designed for use only in specific
countries, and are not allowed to be operated in countries other than those of designat-
ed use. Contact local Authority for procedure to follow.
Caution: This equipment is intended to be used in all EU and EFTA countries. Outdoor
use may be restricted to certain frequencies and/or may require a license for operation.
Contact local Authority for procedure to follow.
Note: Combinations of power levels and antennas resulting in a radiated power level of
above 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 European
community and countries that have adopted the European R&TTE directive 1999/5/EC
and/or the CEPT recommendation Rec 70.03.
For more details on legal combinations of power levels and antennas, contact Linksys
Corporate Compliance.
COPYRIGHT & TRADEMARKS
Copyright © 2002 Linksys, All Rights Reserved.
Instant Wireless, Linksys, and the
Linksys logo are registered trademarks of Linksys Group, Inc. Microsoft, Windows, and
the Windows logo are registered trademarks of Microsoft Corporation.
All other trade-
marks and brand names are the property of their respective proprietors.
LIMITED WARRANTY
Linksys guarantees that every Instant Wireless Dual-Band Wireless A+B Broadband
Router will be free from physical defects in material and workmanship for one year from
the date of purchase, when used within the limits set forth in the Specifications section
of this User Guide. If the product proves defective during this warranty period, call
Linksys Technical Support in order to obtain a Return Authorization number. BE SURE TO
HAVE YOUR PROOF OF PURCHASE ON HAND WHEN CALLING.
When returning a
product, mark the Return Authorization number clearly on the outside of the package and
include a copy of your original proof of purchase.
RETURN REQUESTS CANNOT BE
PROCESSED WITHOUT PROOF OF PURCHASE.
All customers located outside of the
United States of America and Canada shall be held responsible for shipping and han-
dling charges.
IN NO EVENT SHALL LINKSYS'S LIABILITY EXCEED THE PRICE PAID FOR THE PROD-
UCT FROM DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAM-
AGES RESULTING FROM THE USE OF THE PRODUCT, ITS ACCOMPANYING SOFT-
WARE, OR ITS DOCUMENTATION. LINKSYS OFFERS NO REFUNDS FOR ITS PROD-
UCTS.
Linksys makes no warranty or representation, expressed, implied, or statutory,
with respect to its products or the contents or use of this documentation and all accom-
panying software, and specifically disclaims its quality, performance, merchantability, or
fitness for any particular purpose. Linksys reserves the right to revise or update its prod-
ucts, software, or documentation without obligation to notify any individual or entity.
Please direct all inquiries to:
Linksys
P.O. Box 18558, Irvine, CA 92623.
SAFETY AND REGULATORY NOTICES
FCC STATEMENT
The Instant Wireless Dual-Band Wireless A+B Broadband Router has been tested and
found to comply with the specifications for a Class B digital device, pursuant to Part 15
of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may
cause undesired operation.
These limits are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses, and can radiate radio fre-
quency energy and, if not installed and used according to the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that inter-
ference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which is found by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
•
Reorient or relocate the receiving antenna
•
Increase the separation between the equipment or devices
•
Connect the equipment to an outlet other than the receiver's
•
Consult a dealer or an experienced radio/TV technician for assistance
FCC Caution: Any change or modification to the product not expressly approved by
Linksys could void the user's authority to operate the device.
UG-WRT51AB-102202NC JL
Page 3 / 69
Instant Wireless
®
Series
Dual-Band Wireless A+B Broadband Router
Table of Contents
Chapter 1: Introduction
1
The Dual-Band Wireless A+B Broadband Router
1
Features
2
The Router’s Functions
2
IP Addresses
3
Router Setup Overview
4
Chapter 2: Getting to Know the Dual-Band
Wireless A+B Broadband Router
6
The Router’s Back Panel
6
The Router’s Front Panel LEDs
7
Chapter 3: Connect the Router
10
Overview
10
Wired Connection to a PC
10
Wireless Connection to a PC
12
Chapter 4: Configure the PCs
13
Overview
13
Configuring Windows 98 and Millennium PCs
14
Configuring Windows 2000 PCs
16
Configuring Windows XP PCs
18
Chapter 5: Configure the Router’s Basic Settings
20
Chapter 6: The Router’s Web-based Utility
25
Overview
25
How to Access the Web-based Utility
25
Setup
26
Password
38
Status
39
DHCP
42
Log
44
Help
45
Advanced Tabs
47
Advanced Wireless
48
Filters
55
Port Forwarding
58
Routing
60
DMZ Host
63
MAC Address Clone
64
•
Linksys Group vakuuttaa täten että Instant Wireless Dual-Band A+B Broadband
Router tyyppinen laite on direktiivin 1999/5/EY, direktiivin 89/336/EEC ja direktiivin
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.
•
Belgique B L'utilisation en extérieur est autorisé sur le canal 11 (2462 MHz), 12 (2467
MHz), 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 pour
une 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 de
bâtiments, 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 le
départment. L'utilisation en extérieur est soumis à autorisation préalable et très
restreint.
5 GHz Bande: Conformément aux décisions de la CEPT, l'utilisation des fréquences
de la bande 5150 MHz - 5350 MHz est autorisée à l'intérieur des bâtiments avec une
puissance maximale de 200 mW, et interdite en extérieur. La bande 5470 MHz - 5725
MHz 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 MHz
respectively) 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 indoor
with 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. Verificare
con 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 for
procedure to follow.
•
Nederlands NL Licentie verplicht voor gebruik met buitenantennes. Neem contact op
met verkoper voor juiste procedure.
Page 4 / 69
Dual-Band Wireless A+B Broadband Router
Chapter 1: Introduction
s EtherFast
®
Cable/DSL Router
The Dual-Band Wireless A+B Broadband Router is like four devices in one
box! The Router function lets you securely share one high-speed Internet con-
nection among your entire network, while the 4-port, 10/100 switch jump-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+B Broadband Router also contains two wireless
access points, which let you connect with wirelessly networked PCs using
either the popular 2.4GHz, 802.11b standard at 11Mbps, or the new, almost five
times faster, 5GHz, 802.11a standard. Since both standards are built-in, you can
protect your investment in existing 802.11b equipment today, and migrate to
the 802.11a standard as your needs grow.
In addition to up to 152-bit encryption of wireless transmissions, the two access
points in the Dual-Band Wireless A+B Broadband Router support the industri-
al-strength wireless security of 802.1x authentication and authorization. The
Router also serves as a DHCP server, has NAT technology to protect against
Internet intruders, supports VPN pass-through, and can be configured to filter
internal users’ access to the 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,
files, printers, and multi-player games with the flexibility, speed, and security
you need!
1
The Dual-Band Wireless A+B Broadband Router
Instant Wireless
®
Series
Appendix A: Troubleshooting
66
Common Problems and Solutions
66
Frequently Asked Questions
77
Appendix B: How to Ping Your ISP’s E-mail &
Web Addresses
86
Appendix C: Configuring Wireless Security
89
Background
89
WEP Encryption
90
802.1x Authentication
91
MD5 Authentication for Windows XP
92
Digital Certificate Installation
97
TLS Authentication for Windows XP
101
Appendix D: Finding the MAC Address and IP
Address for Your Ethernet Adapter
105
Appendix E: Glossary
108
Appendix F: Specifications
126
Environmental
127
Appendix G: Warranty Information
128
Appendix H: Contact Information
129
Page 5 / 69
Dual-Band Wireless A+B Broadband Router
3
What’s an IP Address?
IP stands for Internet Protocol. Every device on an IP-based network, including
PCs, print servers, and routers, requires an IP address to identify its “location,” or
address, 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 can
assign static IP addresses or use the Router to assign IP addresses dynamically.
Static IP Addresses
A static IP address is 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 must be
unique and are commonly used with network devices such as server PCs or
print servers.
If you use the Router to share your cable or DSL Internet connection, contact
your 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 can
get that information from your ISP.
IP Addresses
Note:
Since the Router is a device that connects two networks, it
needs two IP addresses—one for the LAN, and one for the Internet.
In
this User Guide, you’ll see references to the “Internet IP address” and
the “LAN IP address.”
Since the Router uses NAT technology, the only IP address that can be
seen from the Internet for your network is the Router’s Internet IP
address.
However, even this Internet IP address can be blocked, so that the
Router and network seem invisible to the Internet—see the Block
WAN Requests description under Filters in “Chapter 6: The Router’s
Web-based Utility.”
Instant Wireless
®
Series
2
•
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
•
Enhanced Security Management Functions: Port Filtering, MAC and IP
Address Filtering, DMZ Hosting, and NAT Technology
•
Access Your Corporate Network Remotely through Virtual Private
Networking (VPN)—Supports IPSec and PPTP Pass-Through
•
Easily Configurable through a Web Browser—Locally and over the Internet
•
DHCP Server Capability to Assign IP Addresses Automatically
•
Supports Static and Dynamic Routing (RIP1 and 2)
•
Free Technical Support—24 Hours a Day, 7 Days a Week, Toll-Free US Calls
•
1-Year Limited Warranty
Simply put, a router is a network device that connects two networks together.
In this instance, the Router connects your Local Area Network (LAN), or the
group of PCs in your home or office, to the Internet. The Router processes and
regulates the data that travels between these two 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 in
through 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 the
appropriate PC on the LAN side.
Remember that the Router’s ports connect to two sides. The 10/100 LAN ports
connect to the LAN, and the Internet port connects to the Internet.
The LAN
ports transmit data at 10 Mbps or 100 Mbps, and the broadband port, or
Internet port, transmits data at 10/100 Mbps.
The Router’s Functions
Features

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