Atheros IEEE 802.11a/g WLAN Router User manual

IEEE 802.11a/g WLAN Router
USER’S GUIDE
VERSION 1.0, JUN. 2003

802.11g Router User’s Guide
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Copyright Statement
No part of this publication may be reproduced, stored in a retrieval system, or transmitted in
any form or by any means, whether electronic, mechanical, photocopying, recording or
otherwise without the prior writing of the publisher.
Windows 95/98 and Windows 2000 are trademarks of Microsoft Corp.
Pentium is trademark of Intel.
All copyright is reserved.

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TABLE OF CONTENT
INTRODUCING THE 802.11A/G ROUTER.....................................................................................................................................3
OVERVIEW OF THE 802.11A/G ROUTER...........................................................................................................................................3
802.11A/G ROUTER APPLICATIONS..................................................................................................................................................4
A SECURITY OVERVIEW ...................................................................................................................................................................5
802.11A/G ROUTER FEATURES.........................................................................................................................................................5
SETTING UP THE DEVICE ..................................................................................................................................................................6
INSTALLING THE 802.11A/G ROUTER .....................................................................................................................................7
WHAT’S IN THE BOX? .......................................................................................................................................................................7
A PHYSICAL LOOK AT THE BACK PANEL..........................................................................................................................................8
A PHYSICAL LOOK AT THE FRONT PANEL ........................................................................................................................................9
CONNECTING THE CABLES .............................................................................................................................................................10
HIGH LEVEL CONFIGURATION STEPS REQUIRED FOR THE 802.11A/G ROUTER .........................................................................10
SETTING UP A WINDOWS PC OR WIRELESS CLIENT AS DHCP CLIENTS ......................................................................................11
CONFIGURING A PC RUNNING MS-WINDOWS 95/98/ME:............................................................................................................11
CONFIGURING A PC RUNNING MS-WINDOWS XP/2000: .............................................................................................................11
CONFIRMING YOUR PC’S IP CONFIGURATION:.............................................................................................................................12
CONNECTING MORE DEVICES THROUGH A HUB TO THE 802.11A/G ROUTER ..........................................................................12
BASIC CONFIGURATION OF THE 802.11A/G ROUTER ....................................................................................................13
LOGGING ON...................................................................................................................................................................................14
SETUP WIZARD................................................................................................................................................................................14
ADVANCED SETTINGS ................................................................................................................................................................22
OPERATIONAL MODE......................................................................................................................................................................22
PASSWORD SETTINGS .....................................................................................................................................................................23
SYSTEM MANAGEMENT..................................................................................................................................................................24
SNMP SETTINGS.............................................................................................................................................................................26
DHCP SERVER SETTINGS...............................................................................................................................................................27
MULTIPLE DMZ..............................................................................................................................................................................29
VIRTUAL SERVER SETTINGS ..........................................................................................................................................................30
SPECIAL APPLICATIONS..................................................................................................................................................................31
MAC FILTERING SETTINGS............................................................................................................................................................32
IP FILTERING SETTINGS .................................................................................................................................................................34
IP ROUTING SETTINGS....................................................................................................................................................................36
WIRELESS SETTINGS.......................................................................................................................................................................37
RADIUS SETTINGS.........................................................................................................................................................................38
DYNAMIC DNS SETTINGS ..............................................................................................................................................................40
MANAGING YOUR 802.11A/G ROUTER .................................................................................................................................42
HOW TO VIEW THE DEVICE STATUS ..............................................................................................................................................42
HOW TO VIEW THE SYSTEM LOG...................................................................................................................................................43
DHCP CLIENT TABLE ....................................................................................................................................................................43
WIRELESS CLIENT TABLE ..............................................................................................................................................................43
BRIDGE TABLE ................................................................................................................................................................................44
UPGRADING FIRMWARE .................................................................................................................................................................44
HOW TO SAVE OR RESTORE CONFIGURATION CHANGES.............................................................................................................45
HOW TO REBOOT YOUR 802.11A/G ROUTER.................................................................................................................................45
WHAT IF YOU FORGOT THE PASSWORD?.......................................................................................................................................46
COMMAND LINE INTERFACE..................................................................................................................................................47
GENERAL GUIDELINES ....................................................................................................................................................................47
EXPRESS MODE VS. ADVANCED MODE OF OPERATION ...............................................................................................................48
CONVENTIONS.................................................................................................................................................................................48
COMMAND LIST ..............................................................................................................................................................................49
SPECIFICATION ............................................................................................................................................................................50

Introducing the 802.11a/g Router
This manual gives a basic introduction to 802.11a/g Wireless Router. It provides
information to configure the 802.11a/g Router to operate in common applications
such as connecting to the Internet.
We’ll describe how to use your web browser to configure the 802.11a/g Router and to perform various
management functions, e.g. upgrading the software, or viewing the system log, a task that can be useful
in ongoing operations.
This manual consists of the following chapters and appendixes:
Chapter One, Introduction, summarizes features and capabilities of the 802.11a/g Router.
Chapter Two, Installing the 802.11a/g Router, gives steps you should follow to install the 802.11a/g
Router and configure your PCs.
Chapter Three, Configuring the 802.11a/g Router, describes how to log in to the Web Manager, the
browser screen, and steps needed to configure your 802.11a/g Router for specific applications. It gives
easy-to-follow instructions for quick Internet access and provides a guide to basic 802.11a/g Router
configuration.
Chapter Four, Advanced Configuration, provides information on advanced router configuration.
Chapter Five, Managing your 802.11a/g Router, explains other management features of the 802.11a/g
Router.
Overview of the 802.11a/g Router
The 802.11a/g Router is a small desktop router that sits between your local
Ethernet network and a remote network (e.g., the Internet). The 802.11a/g
Router contains an WAN port connecting to an external ADSL/Cable
modem, a DMZ port, a four-port 10/100Mbps Ethernet switch for
connection to PCs on your local wired network, and a wireless interface for
connection to your local wireless network (supporting a data rate of up to
54 Mbps).
Data comes into the 802.11a/g Router from the local wired and wireless
LAN and then is “routed” to the Internet, and vice versa.
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802.11a/g Router Applications
ACCESSING THE INTERNET
The most common use of the 802.11a/g Router is to provide shared Internet access to allow everyone
on your LAN to surf the web and send/receive emails or files. The 802.11a/g Router can automatically
acquire a public IP address when connecting to the Internet. In turn, it will automatically assign IP
addresses to PCs (requesting DHCP client devices) on your LAN - you don’t have to apply for and
assign IP addresses to PCs on your network.
ACCESSING SERVERS FROM THE PUBLIC NETWORK
If you want special servers to be accessible to remote users across the Internet (e.g., an e-mail server, an
FTP server, or a web server), you can configure the 802.11a/g Router to proxy the service using its
(public) IP address. It means a remote user can access the server by using the 802.11a/g Router’s IP
address. Upon receiving a request, the 802.11a/g Router will re-direct the request to the actual server
on your local network.
OPERATING AS AN ACCESS POINT
Additionally, the Wireless Router can also be configured as an Access Point, and acts as the central
point of your local wireless network supporting a data rate of up to 54 Mbps. It allows client devices on
your wireless network to access the Internet, to communicate with other wireless devices on your
wireless network, or to communicate with devices on your wired LAN network.
Since 802.11g is based on the same 2.4GHz radio band as the 802.11b technology, the 802.11a/g
Router can inter-operate with existing 11Mbps 802.11b devices. Therefore you can protect your
existing investment in 802.11b client cards, and migrate to the high-speed 802.11g standard as your
needs grow.

802.11g Router User’s Guide
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A Security Overview
More and more people are concerned about protecting your local network from the Internet. The
802.11a/g Router provides several ways to keep your network secure:
 Devices on your wired or wireless network are assigned private IP addresses; therefore remote
users from the Internet cannot see nor access them.
 The 802.11a/g Router implements IP packet filtering capabilities, which you can use to selectively
filter (discard) packets to/from the Internet.
 You can selectively restrict management to remote devices.
To address the growing security concern in a wireless LAN environment, different levels of security
can also be enabled in the 802.11a/g Router, including:
 To disable SSID broadcast so to restrict association to only client stations that are already pre-
configured with correct SSIDs
 To enable WEP (Wireless Encryption Protocol) encryption to implement privacy of your data
 Support of Access Control List to allow you to grant/deny access to/from specified wireless
stations (using MAC addresses)
 Provisioning of centralized authentication through RADIUS Server(s).
802.11a/g Router Features
 Compliant with 802.11a, 802.11b and 802.11g standards with roaming capability
 Support of NAT for multiple users to share Internet access
 IP routing (RIP1/RIP2) support
 VPN (Virtual Private Network) support for PPTP/ IPSec pass-through.
 Support of PPPoE and PPTP client function for xDSL connections
 Support of multimedia applications (ICQ, NetMeeting, CUSeeMe, Quick Time, etc).
 Support of the Virtual Server function.
 Support of the standard Access Point mode for connection to wireless clients
 Built-in DHCP server to assign IP addresses to DHCP client devices on both wired and
wireless LAN
 Multiple security measures: to disable SSID broadcast, to define Access Control List, to
enable WEP based encryption (up to 128 bits), plus enhanced Security with 802.1x using a
primary and a backup RADIUS Server
 Extensive monitoring capability such as event logging, traffic/error statistics monitoring

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 Easy configuration and monitoring through the use of a Web-browser based GUI, a
Command Line Interface (CLI) through a remote telnet session, or SNMP commands from a
remote SNMP management station
 Setup Wizard for easy configuration/installation
Setting Up the device
The 802.11a/g Router can be managed by a local PC on either the wired or wireless LAN network. To
do this, the 802.11a/g Router must have an IP address, which can be statically configured, or is
dynamically obtained from a DHCP server on the LAN. For reasons to be given in Chapter 3, static IP
address assignment is much preferred.

802.11g Router User’s Guide
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Installing the 802.11a/g Router
This section describes the installation procedure for your 802.11a/g Router. It starts
with a summary of the content of the package you have purchased, followed by steps of how to
connect and power up your 802.11a/g Router. Finally, it describes how to configure a Windows PC to
communicate with your 802.11a/g Router.
What’s in the Box?
The 802.11a/g Router package comes with the following items:
 One 802.11a/g Router
 One 12V AC power adapter with a barrel connector
 One Category-5 LAN cable with RJ-45 connectors
 One copy of the 802.11a/g Router User’ Guide
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A physical look at the back panel
The following illustration shows the rear panel of Wireless Router.
(1) 4 RJ-45 10/100 Switch connectors for connecting to PCs and workstations or connecting
external Ethernet hub, or switch with auto-sensing.
(2) 1 RJ-45 WAN connector for connecting to Internet via ADSL/Cable modem
(3) 1 RJ-45 DMZ connector for connecting to an internal DMZ network or a PC
(4) 1 AC power connector for connecting through an AC power adapter (included as part of the
product) to the wall power outlet
(5) 1 Restore button to restore the device back to the factory settings