Linksys WRT54G2 - Wireless-G Broadband Router User manual

USER GUIDE
Wireless-G Broadband Router
Model: WRT54G2

About This Guide
i
Wireless-G Broadband Router
About This Guide
Icon Descriptions
While reading through the User Guide you may see
various icons that call attention to specific items. Below is
a description of these icons:
NOTE: This check mark indicates that there is
a note of interest and is something that you
should pay special attention to while using the
product.
WARNING: This exclamation point indicates
that there is a caution or warning and it is
something that could damage your property or
product.
WEB: This globe icon indicates a noteworthy
website address or e-mail address.
Online Resources
Website addresses in this document are listed without
http:// in front of the address because most current web
browsers do not require it. If you use an older web browser,
you may have to add http:// in front of the web address.
Resource Website
Linksys www.linksysbycisco.com
Linksys
International www.linksysbycisco.com/international
Glossary www.linksysbycisco.com/glossary
Network Security www.linksysbycisco.com/security
Copyright and Trademarks
Linksys, Cisco and the Cisco Logo are
registered trademarks or trademarks of
Cisco Systems, Inc. and/or its affiliates in
the U.S. and certain other countries. Other
brands and product names are trademarks
orregistered trademarks of their respective
holders. Copyright © 2009 Cisco Systems,
Inc. All rights reserved.

Table of Contents
ii
Wireless-G Broadband Router
Chapter 1: Product Overview 1
Front Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Placement Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Chapter 2: Wireless Security Checklist 3
General Network Security Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Additional Security Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chapter 3: Advanced Conguration 4
Setup > Basic Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Setup > DDNS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Setup > MAC Address Clone. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Setup > Advanced Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Wireless > Basic Wireless Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Wireless > Wireless Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Wireless > Wireless MAC Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Wireless > Advanced Wireless Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Security > Firewall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Security > VPN Passthrough . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Access Restrictions > Internet Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Applications and Gaming > Port Range Forward. . . . . . . . . . . . . . . . . . . . . . . . . .17
Applications & Gaming > Port Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Applications and Gaming > DMZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Applications and Gaming > QoS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Administration > Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Administration > Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Administration > Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Administration > Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Administration > Upgrade Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Administration > Cong Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Status > Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Status > Local Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Status > Wireless . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Appendix A: Troubleshooting 24
Appendix B: Specications 25
Appendix C: Warranty Information 26
Limited Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Table of Contents
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Wireless-G Broadband Router
Appendix D: Regulatory Information 28
FCC Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
FCC Radiation Exposure Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Safety Notices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Industry Canada Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Avis d’Industrie Canada. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Wireless Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Avis de non-responsabilité concernant les appareils sans l . . . . . . . . . . . . . . . . . .29
User Information for Consumer Products Covered by EU Directive 2002/96/EC on Waste
Electric and Electronic Equipment (WEEE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Appendix E: Software End User License Agreement 34
Cisco Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Software Licenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Chapter 1 Product Overview
1
Wireless-G Broadband Router
Chapter 1:
Product Overview
Thank you for choosing the Linksys by Cisco Wireless-G
Broadband Router.The Router lets you access the Internet
via a wireless connection, broadcast at up to 54 Mbps, or
through one of its four switched ports. You can also use
the Router to share resources such as computers, printers
and files.
A variety of security features help to protect your data and
your privacy while online. Security features include WPA2
security, a Stateful Packet Inspection (SPI) firewall and
NAT technology. Configuring the Router is easy using the
provided browser-based utility.
Front Panel
1, 2, 3, 4 (Green) These numbered LEDs,
corresponding with the numbered ports on the
Router’s back panel, serve two purposes. If the
LED is continuously lit, the Router is successfully
connected to a device through that port. A
flashing LED indicates network activity over
that port.
Wi-Fi Protected Setup Button If you have
client devices, such as wireless adapters, that
support Wi-Fi Protected Setup, then you can
use Wi-Fi Protected Setup to automatically
configure wireless security for your wireless
network(s).
To use Wi-Fi Protected Setup, run the Setup
Wizard, or refer to Wi-Fi Protected Setup, page
10.
Wi-Fi Protected Setup LED (Green/
Amber) It lights up green when wireless
security is enabled. The LED flashes green for
two minutes during Wi-Fi Protected Setup.
The LED lights up amber if there is an error
during the Wi-Fi Protected Setup process. Make
sure the client device supports Wi-Fi Protected
Setup.WaituntiltheLEDisoff,andthentryagain.
The LED flashes amber when a Wi-Fi Protected
Setup session is active, and a second session
begins. The Router supports one session at a
time. Wait until the LED is off before starting the
next Wi-Fi Protected Setup session.
Wireless (Green) The Wireless LED lights up
when the wireless feature is enabled. If the LED
is flashing, the Router is actively sending or
receiving data over the network.
Internet (Green) The Internet LED lights up
when there is a connection made through the
Internet port. A flashing LED indicates network
activity over the Internet port.
Power (Green) The Power LED lights up
and will stay on while the Router is powered
on. When the Router goes through its self-
diagnostic mode during every boot-up, this
LED will flash. When the diagnostic is complete,
the LED will be solidly lit.
Back Panel
Internet The Internet port is where you
connect your cable or DSL Internet connection.
1,2,3,4 TheseEthernet ports(1,2, 3, 4) connect
the Router to PCs on your wired network and
other Ethernet network devices.
Reset There are two ways to reset the Router’s
factory defaults. Either press and hold the Reset
Buttonforapproximatelyfiveseconds,orrestore
the defaults from Administration > Factory
Defaults in the Router’s web-based utility.
Power The Power port is where you connect
the power adapter.
Placement Options
There are two ways to physically install the Router. The
first way is to place the Router horizontally on a surface.
The second way is to mount the Router on a wall.
Horizontal Placement
The Router has four rubber feet on its bottom panel. Place
the Router on a level surface near an electrical outlet.

Chapter 1 Product Overview
2
Wireless-G Broadband Router
Wall-Mounting Placement
The Router has two wall-mount slots on its bottom
panel. The distance between the slots is 152 mm
(6 inches).
Two screws are needed to mount the Router.
Suggested Mounting Hardware
2.5-3.0 mm
4-5 mm 1-1.5 mm
Note: Mounting hardware illustrations are not†
to scale.
NOTE: Linksys is not responsible for damages
incurred by insecure wall-mounting hardware.
Follow these instructions:
Determine where you want to mount the Router. Make1.
sure that the wall you use is smooth, flat, dry, and
sturdy. Also make sure the location is within reach of
an electrical outlet.
Drill two holes into the wall. Make sure the holes are2.
152 mm (6 inches) apart.
Insert a screw into each hole and leave 3 mm3.
(0.12 inches) of its head exposed.
Position the Router so the wall-mount slots line up4.
with the two screws.
Place the wall-mount slots over the screws and slide5.
the Router down until the screws fit snugly into the
wall-mount slots.
152 mm
Wall Mounting Template
Print this page at 100% size.
Cut along the dotted line, and place on the wall to drill precise spacing.

Chapter 2 Wireless Security Checklist
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Wireless-G Broadband Router
Chapter 2:
Wireless Security Checklist
Wireless networks are convenient and easy to install, so
homes with high-speed Internet access are adopting them
at a rapid pace. Because wireless networking operates by
sending information over radio waves, it can be more
vulnerable to intruders than a traditional wired network.
Like signals from your cellular or cordless phones, signals
from your wireless network can also be intercepted. Since
you cannot physically prevent someone from connecting
to your wireless network, you need to take some additional
steps to help keep your network secure.
1. Change the default wireless
network name or SSID
Wireless devices have a default wireless network name
or Service Set Identifier (SSID) set by the factory. This
is the name of your wireless network, and can be up
to 32 characters in length. Linksys wireless products
use linksys as the default wireless network name. You
should change the wireless network name to something
unique to distinguish your wireless network from other
wireless networks that may exist around you, but do not
use personal information (such as your Social Security
number) because this information may be available for
anyone to see when browsing for wireless networks.
2. Change the default password
Forwirelessproductssuchasaccesspointsandrouters,you
willbe asked forapasswordwhenyouwanttochange their
settings. These devices have a default password set by the
factory. The Linksys default password is admin. Hackers
know these defaults and may try to use them to access
your wireless device and change your network settings.
To help thwart any unauthorized changes, customize the
device’s password so it will be hard to guess.
3. Enable MAC address filtering
Linksys routers give you the ability to enable Media Access
Control (MAC) address filtering. The MAC address is a
unique series of numbers and letters assigned to every
networking device. With MAC address filtering enabled,
wireless network access is provided solely for wireless
devices with specific MAC addresses. For example, you can
specify the MAC address of each computer in your home
so that only those computers can access your wireless
network.
4. Enable encryption
Encryption protects data transmitted over a wireless
network. Wi-Fi Protected Access (WPA/WPA2) and Wired
Equivalent Privacy (WEP) offer different levels of security
for wireless communication. Currently, devices that are
Wi-Fi certified are required to support WPA2, but are not
required to support WEP.
A network encrypted with WPA/WPA2 is more secure
than a network encrypted with WEP, because WPA/WPA2
uses dynamic key encryption. To protect the information
as it passes over the airwaves, you should enable the
highest level of encryption supported by your network
equipment.
WEP is an older encryption standard and may be the
only option available on some older devices that do not
support WPA.
General Network Security Guidelines
Wireless network security is useless if the underlying
network is not secure.
Password protect all computers on the network and•
individually password protect sensitive files.
Change passwords on a regular basis.•
Install anti-virus software and personal firewall•
software.
Disable file sharing (peer-to-peer). Some applications•
may open file sharing without your consent and/or
knowledge.
Additional Security Tips
Keep wireless routers, access points, or gateways away•
from exterior walls and windows.
Turn wireless routers, access points, or gateways•
off when they are not being used (at night, during
vacations).
Usestrongpassphrasesthatareatleasteightcharacters•
in length. Combine letters and numbers to avoid using
standard words that can be found in the dictionary.
WEB: For more information on wireless
security, visit www.linksys.com/security

Chapter 3 Advanced Configuration
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Wireless-G Broadband Router
Chapter 3:
Advanced Configuration
After setting up the Router with the Setup Wizard (located
on the CD-ROM), the Router will be ready for use. If you’d
like to change its advanced settings, use the Router’s web-
based utility. This chapter describes each web page of the
utility and each page’s key functions. You can access the
utility via a web browser on a computer connected to the
Router.
The web-based utility has these main tabs: Setup,
Wireless, Security, Access Restrictions, Applications &
Gaming, Administration, and Status. Additional tabs will
be available after you click one of the main tabs.
NOTE: When first installing the Router, you
should use the Setup Wizard on the Setup
CD-ROM. If you want to configure advanced
settings, use this chapter to learn about the
web-based utility.
How to Access the Web-Based Utility
Toaccessthe web-based utility,launch the web browseron
your computer, and enter the Router’s default IP address,
192.168.1.1, in the Address field. Then, press Enter.
A password request screen will appear. (Non-Windows
XP users will see a similar screen.) Leave the User name
field blank. Then enter the password you set up during
the Setup Wizard. (If you did not run the Setup Wizard,
then use the default password, admin. You can set a new
password from the Administration tab’s Management
screen.) Click OK to continue.
Password Screen
Setup > Basic Setup
The first screen that appears is the Basic Setup screen. This
allows you to change the Router’s general settings.
Setup > Basic Setup
Internet Setup
The Internet Setup section configures the Router to your
Internet connection. Most of this information can be
obtained through your Internet Service Provider (ISP).
Internet Connection Type
Select the type of Internet connection your ISP provides
from the drop-down menu. The available types are:
Automatic Configuration - DHCP•
Static IP•
PPPoE•
PPTP•
L2TP•
Telstra Cable•
Automatic Configuration - DHCP
The default Internet Connection Type is Automatic
Configuration - DHCP. Keep the default only if your ISP
supportsDHCPorifyouconnectusingadynamicIPaddress.
(This option usually applies to cable connections.)
Internet Connection Type > Automatic Configuration - DHCP

Chapter 3 Advanced Configuration
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Wireless-G Broadband Router
Static IP
If you are required to use a permanent IP address to
connect to the Internet, select Static IP.
Internet Connection Type > Static IP
Internet IP Address This is the Router’s IP address, when
seen from the Internet. Your ISP will provide you with the
IP Address you need to specify.
Subnet Mask This is the Router’s Subnet Mask, as seen
by users on the Internet (including your ISP). Your ISP will
provide you with the Subnet Mask.
Gateway Your ISP will provide you with the Gateway
address, which is the ISP server’s IP address.
Static DNS Your ISP will provide you with at least one
DNS (Domain Name System) server IP Address.
PPPoE
Some DSL-based ISPs use PPPoE (Point-to-Point Protocol
over Ethernet) to establish Internet connections. If you are
connected to the Internet through a DSL line, check with
your ISP to see if they use PPPoE. If they do, you will have
to enable PPPoE.
Internet Connection Type > PPPoE
User Name and Password Enter the User Name and
Password provided by your ISP.
Connect on Demand: Max Idle Time You can configure
the Router to cut the Internet connection after it has been
inactive for a specified period of time (Max Idle Time). If
your Internet connection has been terminated due to
inactivity, Connect on Demand enables the Router to
automatically re-establish your connection as soon as you
attempt to access the Internet again. To use this option,
select Connect on Demand. In the Max Idle Time field,
enter the number of minutes you want to elapse before
your Internet connection terminates. The default is 5
minutes.
Keep Alive: 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, select
Keep Alive. In the Redial Period field, specify how often
the Router should check the Internet connection. The
default is 30 seconds.
PPTP
Point-to-Point Tunneling Protocol (PPTP) is a service that
applies to connections in Europe only.
Internet Connection Type > PPTP
If your ISP supports DHCP or you are connecting through
a dynamic IP address, then select Obtain an IP Address
Automatically. If you are required to use a permanent IP
address to connect to the Internet, then select Specify an
IP Address. Then configure the following:
Specify an IP Address•This is the Router’s IP address,
as seen from the Internet. Your ISP will provide you
with the IP Address you need to specify.
Subnet Mask•This is the Router’s Subnet Mask, as
seen by users on the Internet (including your ISP).Your
ISP will provide you with the Subnet Mask.
Default Gateway•Your ISP will provide you with the
IP address of the ISP server.
DNS 1-3•Your ISP will provide you with at least one
DNS (Domain Name System) server IP address.
PPTP Server IP Address Your ISP will provide you with
the IP address of the PPTP server.
Username and Password Enter the Username and
Password provided by your ISP.
Connect on Demand: Max Idle Time You can configure
the Router to cut the Internet connection after it has been
inactive for a specified period of time (Max Idle Time). If
your Internet connection has been terminated due to
inactivity, Connect on Demand enables the Router to
automatically re-establish your connection as soon as you
attempt to access the Internet again. To use this option,
select Connect on Demand. In the Max Idle Time field,
enter the number of minutes you want to elapse before
your Internet connection terminates. The default is 5
minutes.

Chapter 3 Advanced Configuration
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Wireless-G Broadband Router
Keep Alive: 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, select
Keep Alive. In the Redial Period field, specify how often the
Router should check the Internet connection. The default is
30 seconds.
L2TP
L2TP is a service that applies to connections in Israel only.
Internet Connection Type > L2TP
User Name and Password Enter the User Name and
Password provided by your ISP.
L2TP Server This is the IP address of the L2TP Server.
Your ISP will provide you with the IP address you need to
specify.
Connect on Demand: Max Idle Time You can configure
the Router to cut the Internet connection after it has been
inactive for a specified period of time (Max Idle Time). If
your Internet connection has been terminated due to
inactivity, Connect on Demand enables the Router to
automatically re-establish your connection as soon as you
attempt to access the Internet again. To use this option,
select Connect on Demand. In the Max Idle Time field,
enter the number of minutes you want to elapse before
your Internet connection terminates. The default is 5
minutes.
Keep Alive: 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, select
Keep Alive. In the Redial Period field, specify how often
the Router should check the Internet connection. The
default is 30 seconds.
Telstra Cable
Telstra Cable is a service that applies to connections in
Australia only. If your ISP uses HeartBeat Signal (HBS), then
select Telstra Cable.
Internet Connection Type > Telstra Cable
User Name and Password Enter the User Name and
Password provided by your ISP.
Heart Beat Server This is the IP address of the Heartbeat
Server. Your ISP will provide you with the IP Address you
need to specify.
Connect on Demand: Max Idle Time You can configure
the Router to cut the Internet connection after it has been
inactive for a specified period of time (Max Idle Time). If
your Internet connection has been terminated due to
inactivity, Connect on Demand enables the Router to
automatically re-establish your connection as soon as you
attempt to access the Internet again. To use this option,
select Connect on Demand. In the Max Idle Time field,
enter the number of minutes you want to have elapsed
before your Internet connection terminates. The default is
5minutes.
Keep Alive: 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, select
Keep Alive. In the Redial Period field, specify how often
the Router should check the Internet connection. The
default is 30 seconds.
Optional Settings
Some of these settings may be required by your ISP. Verify
with your ISP before making any changes.
Optional Settings
Router Name In this field, you can enter a name of up to
39 characters to represent the Router.
Host Name/Domain Name These fields allow you to
supply a host and domain name for the Router. Some ISPs,
usually cable ISPs, require these names as identification.
You may have to check with your ISP to see if your
broadband Internet service has been configured with a
host and domain name. In most cases, leaving these fields
blank will work.

Chapter 3 Advanced Configuration
7
Wireless-G Broadband Router
MTU MTU is the Maximum Transmission Unit. It specifies
the largest packet size permitted for Internet transmission.
Select Manual if you want to manually enter the largest
packet size that is transmitted. To have the Router select
the best MTU for your Internet connection, keep the
default, Auto.
Size When Manual is selected in the MTU field, this option
is enabled. Leave this value in the 1200 to 1500 range. The
default size depends on the Internet Connection Type:
DHCP, Static IP, or Telstra:•1500
PPPoE:•1492
PPTP or L2TP:•1460
Network Setup
The Network Setup section changes the settings on the
network connected to the Router’s Ethernet ports.Wireless
Setup is performed through the Wireless tab.
Router IP
This presents both the Router’s IP Address and Subnet
Mask as seen by your network.
Router IP Address
Network Address Server Settings (DHCP)
The settings allow you to configure 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. If you choose to enable the
Router’s DHCP server option, make sure there is no other
DHCP server on your network.
Network Address Server Settings (DHCP)
DHCP Server DHCP is enabled by factory default. If you
already have a DHCP server on your network, or you do
not want a DHCP server, then select Disable (no other
DHCP features will be available).
Starting IP Address Enter a value for the DHCP server
to start with when is suing IP addresses. Because the
Router’s default IP address is 192.168.1.1, the Starting IP
Address must be 192.168.1.2 or greater, but smaller than
192.168.1.253. The default is 192.168.1.100 .
Maximum Number of DHCP Users Enter the maximum
number of PCs that you want the DHCP server to assign
IP addresses to. This number cannot be greater than 253.
The default is 50.
Client Lease Time The Client Lease Time is the amount
of time a network user will be allowed connection to the
Router with their current dynamic IP address. Enter the
amount of time, in minutes, that the user will be “leased”
this dynamic IP address. After the time is up, the user will
be automatically assigned a new dynamic IP address, or
the lease will be renewed. The default is 0minutes, which
means one day.
Static DNS (1-3) The Domain Name System (DNS) is how
the Internet translates domain or website names into
Internet addresses or URLs.Your ISP will provide you with at
least one DNS Server IP Address. If you wish to use another,
enter that IP Address in one of these fields.You can enter up
to three DNS Server IP Addresses here. The Router will use
these for quicker access to functioning DNS servers .
WINS The Windows Internet Naming Service (WINS)
manages each PC’s interaction with the Internet. If you
use a WINS server, enter that server’s IP Address here.
Otherwise, leave this blank.
Time Setting
Select the time zone in which your network functions
from this drop-down menu. (You can even automatically
adjust for daylight saving time.)
Time Setting
Click Save Settings to apply your changes, or click Cancel
Changes to clear your changes.
Setup > DDNS
The Router offers a Dynamic Domain Name System (DDNS)
feature. DDNS lets you assign a fixed host and domain
name to a dynamic Internet IP address. It is useful when
you are hosting your own website, FTP server, or other
server behind the Router.
Before you can use this feature, you need to sign
up for DDNS service with a DDNS service provider,
www.dyndns.org or www.TZO.com. If you do not want
to use this feature, keep the default setting, Disable.

Chapter 3 Advanced Configuration
8
Wireless-G Broadband Router
DDNS
The Router offers a Dynamic Domain Name System (DDNS)
feature. DDNS lets you assign a fixed host and domain
name to a dynamic Internet IP address. It is useful when
you are hosting your own website, FTP server, or other
server behind the Router.
Before you can use this feature, you need to sign up for
DDNS service at one of two DDNS service providers,
DynDNS.org or TZO.com. If you do not want to use this
feature, keep the default, Disable.
DDNS Service
If your DDNS service is provided by DynDNS.org, then
select DynDNS.org from the drop-down menu. If your
DDNS service is provided by TZO, then select TZO.com.
The features available on the DDNS screen will vary,
depending on which DDNS service provider you use.
DynDNS.org
Setup > DDNS > DynDNS
User Name Enter the User Name for your DDNS account.
Password Enter the Password for your DDNS account.
Host Name The is the DDNS URL assigned by the DDNS
service.
Internet IP Address The Router’s Internet IP address is
displayed. Because it is dynamic, it will change.
Status The status of the DDNS service connection is
displayed.
Click Save Settings to apply your changes, or click Cancel
Changes to clear your changes.
TZO.com
Setup > DDNS > TZO
E-mail Address, TZO Key, and Domain Name Enter the
settings of the account you set up with TZO.
Internet IP Address The Router’s Internet IP address is
displayed. Because it is dynamic, it will change.
Status The status of the DDNS service connection is
displayed.
Click Save Settings to apply your changes, or click Cancel
Changes to clear your changes.
Setup > MAC Address Clone
Some ISPs will require you to register a MAC address
in order to access the Internet. A MAC address is a
12-digit code assigned to a unique piece of hardware for
identification. If you do not wish to re-register the MAC
address with your ISP, you can use the MAC Address Clone
feature to assign the currently registered MAC address to
the Router.
Setup > MAC Address Clone
MAC Address Clone
Enable/Disable To have the MAC Address cloned, select
Enable.

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User Defined Entry Enter the MAC Address registered
with your ISP here.
Clone Your PC’s MAC Clicking this button will clone the
MAC address of the computer you are using.
Click Save Settings to apply your changes, or click Cancel
Changes to clear your changes.
Setup > Advanced Routing
This screen is used to set up the Router’s advanced routing
functions.NATroutesthehostRouter‘snetworkconnection
to the Internet. Dynamic Routing automatically adjusts
how packets travel on your network. Static Routing sets
up a fixed route to another network destination.
Setup > Advanced Routing (Gateway)
Setup > Advanced Routing (Router )
Advanced Routing
Operating Mode Select the mode in which this Router
will function. If this Router is hosting your network’s
connection to the Internet, select Gateway. If another
Router exists on your network, select Router. When
Router is chosen, Dynamic Routing will be available as
an option.
Dynamic Routing
RIP This feature enables the Router to automatically
adjust to physical changes in the network’s layout and
exchange routing tables with the other router(s). The
Router determines the network packets’ route based on
the fewest number of hops between the source and the
destination. This feature is Disabled by default. From the
drop-down menu, you can also select LAN & Wireless,
which performs dynamic routing over your Ethernet and
wireless networks. You can also select WAN (Internet),
which performs dynamic routing with data coming from
the Internet. Finally, selecting Both enables dynamic
routing for both networks, as well as data from the
Internet.
Select set number To set up a static route between the
Router and another network, select a number from the
Static Routing drop-down list. (A static route is a pre-
determined pathway that network information must travel
to reach a specific host or network.) Enter the information
described below to set up a new static route. (Click the
Delete This Entry button to delete a static route.)
Enter Route Name Enter a name for the Route here,
using a maximum of 25 alphanumeric characters.
Destination LAN IP The Destination LAN IP is the address
of the remote network or host to which you want to assign
a static route.
Subnet Mask The Subnet Mask determines which
portion of a Destination LAN IP address is the network
portion, and which portion is the host portion.
Default Gateway This is the IP address of the gateway
device that allows for contact between the Router and the
remote network or host.
Interface This interface tells you whether the Destination
IP Address is on the LAN &Wireless (Ethernet and wireless
networks) or the WAN (Internet).
Delete This Entry To delete a route, select its number
from the drop-down menu, and click this button.
Show Routing Table Click Show Routing Table to open
a screen displaying how data is routed through your local
network. For each route, the Destination LAN IP address,
Subnet Mask, Gateway, and Interface are displayed. Click
Refresh to update the information. Click Close to exit this
screen.
Routing Table

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Click Save Settings to apply your changes, or click Cancel
Changes to clear your changes.
Wireless > Basic Wireless Settings
The basic settings for wireless networking are set on this
screen.
There are two ways to configure the Router’s wireless
network(s), manual and Wi-Fi Protected Setup.
Wi-Fi Protected Setup is a feature that makes it easy to set
up your wireless network. If you have client devices, such
as wireless adapters, that support Wi-Fi Protected Setup,
then you can use Wi-Fi Protected Setup.
Wireless > Basic Wireless Settings (Manual Setup)
Wireless Configuration To manually configure your
wireless network, select Manual. Proceed to the“Wireless
Network (Manual)” section. To use Wi-Fi Protected Setup,
select Wi-Fi Protected Setup. Proceed to Wi-Fi Protected
Setup, page 10.
Wireless Network (Manual)
Wireless Network Mode From this drop-down menu,
you can select the wireless standards running on your
network. If you haveWireless-N,Wireless-G, andWireless-B
devices in your network, keep the default setting, Mixed.
If you have only Wireless-G and Wireless-B devices in your
network, select BG-Mixed. If you have only Wireless-N
devices, select Wireless-N Only. If you have only
Wireless-G devices, select Wireless-G Only. If you have
only Wireless-B devices, select Wireless-B Only. If your
network has no wireless devices, or if you want to disable
wireless networking, select Disabled.
Wireless Network Name (SSID) The SSID is the network
name shared among all points in a wireless network.
The SSID must be identical for all devices in the wireless
network. It is case-sensitive and must not exceed
32 keyboard characters. For added security, you should
change the default SSID (linksys) to a unique name.
Wireless Channel Select the channel from the list
provided to correspond with your network settings. All
devices in your wireless network must be broadcast on
the same channel in order to function correctly.
Wireless SSID Broadcast When wireless clients survey
the local area for wireless networks to associate with, they
will detect the SSID broadcast by the Router. To broadcast
the Router’s SSID, keep the default, Enabled. If you do
not want to broadcast the Router’s SSID, then select
Disabled.
Click Save Settings to apply your changes, or click Cancel
Changes to clear your changes.
Wi-Fi Protected Setup
There are three methods available. Use the method that
applies to the client device you are configuring.
Wireless > Basic Wireless Settings (Wi-Fi Protected Setup)
Wi-Fi Protected Setup > Congratulations
NOTE: Wi-Fi Protected Setup configures one
client device at a time. Repeat the instructions
for each client device that supports Wi-Fi
Protected Setup.

Chapter 3 Advanced Configuration
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Wireless-G Broadband Router
Method #1
Use this method if your client device has a Wi-Fi Protected
Setup button.
Click or press the1. Wi-Fi Protected Setup button on
the client device.
Click the2. Wi-Fi Protected Setup button on this
screen.
After the client device has been configured, click3.
OK. Then refer back to your client device or its
documentation for further instructions.
Method #2
Use this method if your client device has a Wi-Fi Protected
Setup PIN number.
Enter the PIN number in the1. field on this screen.
Click2. Register.
After the client device has been configured, click3.
OK. Then refer back to your client device or its
documentation for further instructions.
Method #3
Use this method if your client device asks for the Router’s
PIN number.
Enter the PIN number listed on this screen. (It is also1.
listed on the label on the bottom of the Router.)
After the client device has been configured, click2.
OK. Then refer back to your client device or its
documentation for further instructions.
The Wi-Fi Protected Setup Status, Network Name (SSID),
Security, Encryption, and Passphrase are displayed at the
bottom of the screen.
NOTE: If you have client devices that do not
support Wi-Fi Protected Setup, note the wireless
settings, and then manually configure those
client devices.
Wireless > Wireless Security
The Wireless Security settings configure the security of
your wireless network.There are six wireless security mode
options supported by the Router: WPA2 Personal, WPA
Personal, WPA2 Enterprise, WPA Enterprise, RADIUS, and
WEP. WPA (Wi-Fi Protected Access) is a stronger security
standard than WEP (Wireless Equivalent Privacy), and
WPA2 is even more secure than WPA. RADIUS is Remote
Authentication Dial-In User Service. These six are briefly
discussed here. For more information about wireless
security, refer to Chapter 2: Wireless Security Checklist,
page 3.
Wireless Security
Wireless security is strongly recommended, and WPA2 is
the strongest method available. UseWPA2 if it is supported
by all of your wireless devices.
Security Mode
Select the security method for your wireless network. If
you do not want to use wireless security, keep the default,
Disabled.
WPA2 Personal
NOTE: If you are using WPA2 or WPA, each
device in your wireless network MUST use the
same WPA method and shared key, or else the
network will not function properly.
Security Mode > WPA2 Personal
WPAAlgorithm WPA2supportstwoencryptionmethods,
TKIP and AES, with dynamic encryption keys. Select the
type of algorithm, AES, or TKIP + AES. The default is AES.
WPA Shared Key Enter a WPA Shared Key of 8-63
characters.
Group Key Renewal Enter a Group Key Renewal period,
which instructs the Router how often it should change the
encryption keys. The default is 3600 seconds.

Chapter 3 Advanced Configuration
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Wireless-G Broadband Router
WPA Personal
NOTE: If you are using WPA2 or WPA, each
device in your wireless network MUST use the
same WPA method and shared key, or else the
network will not function properly.
Security Mode > WPA Personal
WPA Algorithm WPA supports two encryption methods,
TKIP and AES, with dynamic encryption keys. Select
the type of algorithm, TKIP or AES. (AES is a stronger
encryption method than TKIP.)
WPA Shared Key Enter the key shared by the Router and
your other network devices. It must have 8-63 characters.
Group Key Renewal Enter a Key Renewal period, which
tells the Router how often it should change the encryption
keys. The default is 3600 seconds.
WPA2 Enterprise
This option features WPA2 used in coordination with a
RADIUS server. (This should only be used when a RADIUS
server is connected to the Router.
Security Mode > WPA2 Enterprise
WPA Algorithm WPA2 supports two encryption
methods, TKIP and AES, with dynamic encryption keys.
Select the type of algorithm, AES, or TKIP + AES. The
default is AES
RADIUS Server Address Enter the IP Address of the
RADIUS server.
RADIUS Port Enter the port number of the RADIUS
server. The default is 1812.
Shared Key Enter the key shared between the Router
and the server.
Key Renewal Timeout Enter a Key Renewal Timeout
period, which instructs the Router how often it should
change the encryption keys. The default is 3600 seconds.
WPA Enterprise
This option features WPA used in coordination with a
RADIUS server. (This should only be used when a RADIUS
server is connected to the Router.)
Security Mode > WPA Enterprise
WPA Algorithm WPA supports two encryption methods,
TKIP and AES, with dynamic encryption keys. Select
the type of algorithm, TKIP or AES. (AES is a stronger
encryption method than TKIP.)
RADIUS Server Address Enter the IP Address of the
RADIUS server.
RADIUS Port Enter the port number of the RADIUS
server. The default is 1812.
Shared Key Enter the key shared between the Router
and the server.
Key Renewal Timeout Enter a Key Renewal Timeout
period, which instructs the Router how often it should
change the encryption keys. The default is 3600 seconds.

Chapter 3 Advanced Configuration
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Wireless-G Broadband Router
RADIUS
This option features WEP used in coordination with a
RADIUS server. (This should only be used when a RADIUS
server is connected to the Router.)
Security Mode > RADIUS
IMPORTANT: If you are using WEP encryption,
each device in your wireless network MUST
use the same WEP encryption method and
encryption key, or else your wireless network will
not function properly.
RADIUS Server Address Enter the IP Address of the
RADIUS server.
RADIUS Port Enter the port number of the RADIUS
server. The default is 1812.
Shared Key Enter the key shared between the Router
and the server.
Default Transmit Key Select a Default Transmit Key
(choose which Key to use). The default is 1.
WEP Encryption Select a level of WEP encryption,
64 bits 10 hex digits or 128 bits 26 hex digits. The
default is 64 bits 10 hex digits.
Passphrase Enter a Passphrase to automatically generate
WEP keys. Then click Generate.
Key 1-4 If you did not enter a Passphrase, enter the WEP
key(s) manually.
WEP
WEP is a basic encryption method, which is not as secure
as WPA.
IMPORTANT: If you are using WEP encryption,
each device in your wireless network MUST
use the same WEP encryption method and
encryption key, or else your wireless network will
not function properly.
Security Mode > WEP
Default Transmit Key Select a Default Transmit Key
(choose which Key to use). The default is 1.
WEP Encryption Select a level ofWEP encryption, 64 bits
10 hex digits or 128 bits 26 hex digits. The default is
64 bits 10 hex digits.
Passphrase Enter a Passphrase to automatically generate
WEP keys. Then click Generate.
Key 1-4 If you did not enter a Passphrase, enter the WEP
key(s) manually.
Click Save Settings to apply your changes, or click Cancel
Changes to clear your changes.
Wireless > Wireless MAC Filter
Wireless access can be filtered (restricted) by specifying the
MAC addresses of the devices in your wireless network.
Wireless > Wireless MAC Filter

Chapter 3 Advanced Configuration
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Wireless-G Broadband Router
Wireless MAC Filter
Wireless MAC Filter To filter wireless users by MAC Address,
either permitting or blocking access, click Enable. If you do
not wish to filter users by MAC Address, keep the default,
Disable .
Prevent Select this to block wireless access by MAC
Address. This button is selected by default.
Permit Only Select this to allow wireless access by MAC
Address. This button is not selected by default.
Edit MAC Filter List Click this to open the MAC Address
Filter List screen. On this screen, you can list users, by MAC
Address, to whom you wish to provide or block access. For
easy reference, click Wireless Client MAC List to display a list
of network users by MAC Address .
MAC Address Filter List
Click Save Settings to apply your changes, or click Cancel
Changes to clear your changes.
Wireless > Advanced Wireless Settings
This Wireless > Advanced Wireless Settings screen is used
to set up the Router’s advanced wireless functions.
These settings should only be adjusted by an expert
administrator because incorrect settings can reduce
wireless performance.
Wireless > Advanced Wireless Settings
Advanced Wireless
Authentication Type The default is set to Auto, which
allows either Open System or Shared Key authentication
to be used. With Open System authentication, the sender
and the recipient do NOT use aWEP key for authentication.
With Shared Key authentication, the sender and recipient
use a WEP key for authentication.
Basic Rate The Basic Rate setting is not actually one rate
of transmission but a series of rates at which the Router
can transmit. The Router will advertise its Basic Rate to
the other wireless devices in your network, so they know
which rates will be used.The Router will also advertise that
it will automatically select the best rate for transmission.
The default setting is Default, for transmission at all
standard wireless rates (1-2 Mbps, 5.5 Mbps, 11 Mbps, 18
Mbps, and 24 Mbps). Other options are 1-2Mbps, for use
with older wireless technology, and All, for transmission
at all wireless rates. The Basic Rate is not the actual rate
of data transmission. If you want to specify the Router’s
rate of data transmission, configure the Transmission Rate
setting.
Transmission Rate The rate of data transmission should
be set depending on the speed of your wireless network.
You can select from a range of transmission speeds, or you
can select Auto to have the Router automatically use the
fastest possible data rate and enable the Auto-Fallback
feature. Auto-Fallback will negotiate the best possible
connection speed between the Router and a wireless
client. The default is Auto.
CTS Protection Mode CTS (Clear-To-Send) Protection
Mode should remain disabled unless you are having severe
problems with your Wireless-G products not being able
to transmit to the Router in an environment with heavy
802.11b traffic. This function boosts the Router’s ability
to catch all Wireless-G transmissions but will severely
decrease performance.
Frame Burst Enabling this option should provide your
network with greater performance, depending on the

Chapter 3 Advanced Configuration
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Wireless-G Broadband Router
manufacturer of your wireless products. To turn on the
Frame Burst option, select Enable. The default is Disable.
Beacon Interval A beacon is a packet broadcast by the
Router to synchronize the wireless network. The default
is 100. Enter a value between 1 and 65,535 milliseconds.
The Beacon Interval value indicates the frequency interval
of the beacon.
DTIM Interval This value, between 1 and 255, indicates
the interval of the Delivery Traffic Indication Message
(DTIM). A DTIM field is a countdown field informing
clients of the next window for listening to broadcast
and multicast messages. When the Router has buffered
broadcast or multicast messages for associated clients, it
sends the next DTIM with a DTIM Interval value. Its clients
hear the beacons and awaken to receive the broadcast
and multicast messages. The default is 1.
Fragmentation Threshold This value specifies the
maximum size for a packet before data is fragmented
into multiple packets. If you experience a high packet
error rate, you may slightly increase the Fragmentation
Threshold. Setting the Fragmentation Threshold too low
may result in poor network performance. Only minor
reduction of the default value is recommended. In most
cases, it should remain at its default value of 2346.
RTS Threshold Should you encounter inconsistent data
flow, only minor reduction of the default value, 2347, is
recommended. If a network packet is smaller than the
preset RTS threshold size, the RTS/CTS mechanism will
not be enabled. The Router sends Request to Send (RTS)
frames to a particular receiving station and negotiates
the sending of a data frame. After receiving an RTS, the
wireless station responds with a Clear to Send (CTS) frame
to acknowledge the right to begin transmission. The RTS
Threshold value should remain at its default value of
2347.
AP Isolation This isolates all wireless clients and wireless
devices on your network from each other. Wireless devices
will be able to communicate with the Router but not with
each other. To use this function, select On. AP Isolation is
turned Off by default.
Click Save Settings to apply your changes, or click Cancel
Changes to clear your changes.
Security > Firewall
The Security > Firewall screen is used to configure a firewall
that can filter out various types of unwanted traffic on the
Router’s local network.
Security > Firewall
Firewall
Firewall Protection To use firewall protection, keep the
default selection, Enable. To turn off firewall protection,
select Disable.
Block WAN Requests
Block Anonymous Internet Requests This feature
makes it more difficult for outside users to work their
way into your network. This feature is selected by default.
Deselect the feature to allow anonymous Internet
requests .
Filter Multicast Multicasting allows for multiple
transmissions to specific recipients at the same time. If
multicasting is permitted, then the Router will allow IP
multicast packets to be forwarded to the appropriate
computers. This feature is selected by default. Deselect
this feature to disable it.
Filter Internet NAT Redirection This feature uses
port forwarding to block access to local servers from
local networked computers. Select Filter Internet NAT
Redirection to filter Internet NAT redirection. This feature
is not selected by default.
Filter IDENT (Port 113) This feature keeps port 113 from
being scanned by devices outside of your local network.
This feature is selected by default. Deselect this feature to
disable it.
Click Save Settings to apply your changes, or click Cancel
Changes to clear your changes.
Security > VPN Passthrough
The Security > VPN Passthrough screen allows you to enable
VPN tunnels using IPSec, PPTP, or L2TP protocols to pass
through the Router’s firewall.

Chapter 3 Advanced Configuration
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Wireless-G Broadband Router
Security > VPN Passthrough
VPN Passthrough
IPSec Passthrough Internet Protocol Security (IPSec) is
a suite of protocols used to implement secure exchange
of packets at the IP layer. To allow IPSec tunnels to pass
through the Router, keep the default, Enable.
PPTP Passthrough Point-to-Point Tunneling Protocol
(PPTP) allows the Point-to-Point Protocol (PPP) to be
tunneled through an IP network. To allow PPTP tunnels to
pass through the Router, keep the default, Enable.
L2TP Passthrough Layer 2 Tunneling Protocol is the
method used to enable Point-to-Point sessions via the
Internet on the Layer 2 level. To allow L2TP tunnels to pass
through the Router, keep the default, Enable.
Click Save Settings to apply your changes, or click Cancel
Changes to clear your changes.
Access Restrictions > Internet Access
The Access Restrictions > Internet Access screen allows you
to block or allow specific kinds of Internet usage and
traffic, such as Internet access, designated services, and
websites during specific days and times.
Access Restrictions > Internet Access
Internet Access
Internet Access Policy Access can be managed by a
policy. Use the settings on this screen to establish an
access policy (after Save Settings is clicked). Selecting a
policy from the drop-down menu will display that policy’s
settings. To delete a policy, select that policy’s number
and click Delete. To view all the policies, click Summary.
(To delete policies from the Summary screen, select the
policy or policies, and click Delete.To return to the Internet
Access screen, click Close.)
Internet Policy Summary
Status Policies are disabled by default.To enable a policy,
select the policy number from the drop-down menu, and
select Enable.
To create an Internet Access policy:
Select a number from the1. Internet Access Policy drop-
down menu.
To enable this policy, select2. Enable.
Enter a Policy Name in the field provided.3.
Click4. Edit List of PCs to select which PCs will be affected
by the policy. The List of PCs screen appears. You can