USER GUIDE
Wireless-N Home Router
Model: WRT120N
About This Guide
i
Wireless-N Home 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.
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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
or registered trademarks of their respective
holders. Copyright © 2009 Cisco Systems,
Inc. All rights reserved.
Table of Contents
ii
Wireless-N Home Router
Chapter 1:
Product Overview 1
Front Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Chapter 2:
Wireless Security Checklist 3
General Network Security Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Additional Security Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chapter 3:
Advanced Conguration 4
Setup > Basic Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Setup > DDNS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Setup > MAC Address Clone. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Setup > Advanced Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Wireless > Basic Wireless Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Wireless > Wireless Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Wireless > Wireless MAC Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Wireless > Advanced Wireless Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Security > Firewall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Security > VPN Passthrough. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Access Restrictions > Internet Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Applications and Gaming > Single Port Forwarding. . . . . . . . . . . . . . . . . . . . . . . .19
Applications and Gaming > Port Range Forwarding . . . . . . . . . . . . . . . . . . . . . . .19
Applications & Gaming > Port Range Triggering . . . . . . . . . . . . . . . . . . . . . . . . . .20
Applications and Gaming > DMZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Applications and Gaming > QoS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Administration > Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Administration > Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Administration > Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Administration > Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Administration > Firmware Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Status > Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Status > Local Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Status > Wireless Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Appendix A:
Troubleshooting 28
Appendix B:
Specications 30
Appendix E:
Table of Contents
iii
Wireless-N Home Router
Warranty Information 31
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Exclusions and Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Obtaining Warranty Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Appendix D:
Regulatory Information 33
FCC Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Safety Notices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Industry Canada Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Wireless Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Avis de non-responsabilité concernant les appareils sans l . . . . . . . . . . . . . . . . . .34
Declaration of Conformity with Regard to EU Directive 1999/5/EC (R&TTE Directive) . .35
Wireless Equipment (Wireless-N/G/A/B Products) . . . . . . . . . . . . . . . . . . . . . . . . .36
CE Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
National Restrictions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Product Usage Restrictions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Technical Documents on
www.linksysbycisco.com/international . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
User Information for Consumer Products Covered by EU Directive 2002/96/EC on Waste
Electric and Electronic Equipment (WEEE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Appendix E: Software End User License Agreement 42
Cisco Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Software Licenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Chapter 1
Product Overview
1
Wireless-N Home Router
Chapter 1:
Product Overview
Thank you for choosing the Linksys by Cisco Wireless-N
Home Router. The Router lets you access the Internet via
a wireless connection 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 you are 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 (Blue) 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.
To use Wi-Fi Protected Setup, run the Setup
Wizard, or refer to Wi-Fi Protected Setup, page
11.
Wi-Fi Protected Setup LED (Blue/
Amber) The LED lights up blue when wireless
security is enabled. It flashes blue 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. Wait until the LED is off, and then try again.
The LED flashes when a Wi-Fi Protected Setup
session is active. The Router supports one
session at a time. Wait until the LED is solidly lit,
or off before starting the next Wi-Fi Protected
Setup session.
Wireless (Blue) The Wireless LED lights up
when the wireless feature is enabled. If the LED
is flashing, the Router is sending or receiving
data over the network.
Internet (Blue) The Internet LED lights up
when there is a connection made through the
Internet port. It flashes to indicate network
activity over the Internet port.
Power (Blue) 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 will
connect your cable or DSL Internet connection.
4, 3, 2, 1 These Ethernet ports (4, 3, 2, 1)
connect the Router to computers on your wired
network and other Ethernet network devices.
Reset The Reset button is located on the
right side of the product label. There are two
ways to reset the Router to its factory defaults.
Either press and hold the Reset button for
approximately five seconds, or restore the
defaults from the Administration > Factory
Defaults screen of the Router’s browser-based
utility.
Power The Power port connects to the included
power adapter.
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-N Home 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
true to scale.
NOTE: Linksys is not responsible for damages
incurred by insecure wall-mounting hardware.
Follow these instructions:
1. Determine where you want to mount the Router. Make
sure that the wall you use is smooth, flat, dry, and
sturdy. Also make sure the location is within reach of
an electrical outlet.
2. Drill two holes into the wall. Make sure the holes are
152 mm (6 inches) apart.
3. Insert a screw into each hole and leave 3 mm
(0.12 inches) of its head exposed.
4. Maneuver the Router so the wall-mount slots line up
with the two screws.
5. Place the wall-mount slots over the screws and slide
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
3
Wireless-N Home 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 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
For wireless products such as access points and routers,
you will be asked for a password when you want to change
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 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.
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.
s Password protect all computers on the network and
individually password protect sensitive files.
s Change passwords on a regular basis.
s Install anti-virus software and personal firewall
software.
s Disable file sharing (peer-to-peer). Some applications
may open file sharing without your consent and/or
knowledge.
Additional Security Tips
s Keep wireless routers, access points, or gateways away
from exterior walls and windows.
s Turn wireless routers, access points, or gateways
off when they are not being used (at night, during
vacations).
s Use strong passphrases that are at least eight characters
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.linksysbycisco.com/security
Chapter 3
Advanced Configuration
4
Wireless-N Home 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. However,
if you want to change its advanced settings, use the
Router’s browser-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 browser-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
browser-based utility.
Access the Browser-Based Utility
To access the browser-based utility, launch the web
browser on your computer, and enter the Router’s default
IP address, 192.168.1.1, in the Address field. Then press
Enter.
A login screen will appear. (Non-Windows XP users will
see a similar screen.) Leave the User name field blank.
The first time you open the browser-based utility, use the
default password admin. (You can set a new password
from the Administration > Management screen.) Click OK
to continue.
Login 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
Language
Select your language
To use a different language, select
one from the drop-down menu. The language of the
browser-based utility will change five seconds after you
select another language.
Click Save Settings to apply your changes, or click Cancel
Changes to clear your changes.
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. These are the available types:
s Automatic Configuration - DHCP
s Static IP
s PPPoE
s PPTP
s L2TP
s Telstra Cable
Chapter 3
Advanced Configuration
5
Wireless-N Home Router
Automatic Configuration - DHCP
By default, the Router’s Internet Connection Type is set
to Automatic configuration - DHCP, which should be
kept only if your ISP supports DHCP or you are connecting
through a dynamic IP address. (This option usually applies
to cable connections.)
Internet Connection Type > Automatic Configuration - DHCP
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 here.
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.
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
Username and Password Enter the Username and
Password provided by your ISP.
Service Name (Optional) If provided by your ISP, enter
the Service Name.
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
Max Idle Time 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,
you specify how often you want the Router to check
the Internet connection. The default Redial Period 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:
s 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 here.
s 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.
s Default Gateway Your ISP will provide you with the
IP address of the ISP server.
Chapter 3
Advanced Configuration
6
Wireless-N Home Router
s 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 have elapsed
before your Internet connection terminates. The default
Max Idle Time 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, you specify how often
you want the Router to check the Internet connection. The
default value is 30 seconds.
L2TP
L2TP is a service that applies to connections in Israel only.
Internet Connection Type > L2TP
Server IP Address This is the IP address of the L2TP
Server. Your ISP will provide you with the IP Address you
need to specify here.
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 have elapsed
before your Internet connection terminates. The default
Max Idle Time 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,
you specify how often you want the Router to check
the Internet connection. The default Redial Period is
30 seconds.
Telstra Cable
Telstra Cable is a service that applies to connections in
Australia only.
Internet Connection Type > Telstra Cable
Server IP Address This is the IP address of the Heartbeat
Server. Your ISP will provide you with the IP Address you
need to specify here.
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 have elapsed
before your Internet connection terminates. The default
Max Idle Time 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,
you specify how often you want the Router to check
the Internet connection. The default Redial Period 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
Chapter 3
Advanced Configuration
7
Wireless-N Home Router
Host Name and 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.
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:
s DHCP, Static IP, or Telstra: 1500
s PPPoE: 1492
s PPTP or L2TP: 1460
Network Setup
The Network Setup section changes the settings of the
local network. Wireless setup is performed through the
Wireless tab.
Router IP
This presents both the Router’s Local IP Address and
Subnet Mask as seen by your network.
Router IP
DHCP Server Setting
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.
DHCP Server Setting
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 Disabled (no other
DHCP features will be available).
DHCP Reservation Click this button if you want to assign
a fixed local IP address to a MAC address.
DHCP Reservation
You will see a list of DHCP clients with the following
information: Client Name, Interface, IP Address, and
MAC Address.
DHCP Reservation
s Select Clients from DHCP Table Click the Select
check box to reserve a client’s IP address. Then click
Add Clients.
s Manually Adding Client To manually assign an IP
address, enter the client’s name in the Enter Client
Name field. Enter the IP address you want it to have in
the Assign IP Address field. Enter its MAC address in the
To This MAC Address field. Then click Add.
Clients Already Reserved
A list of DHCP clients and their fixed local IP addresses
will be displayed at the bottom of the screen. If you
want to remove a client from this list, click Remove.
Click Save Settings to apply your changes, or click
Cancel Changes to clear your changes. To update the
on-screen information, click Refresh. To exit this screen
and return to the Basic Setup screen, click Close.
Start 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 Start 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 Users Enter the maximum number
of computers that you want the DHCP server to assign IP
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