Cisco | WRT54GX | User guide | Cisco WRT54GX User guide

®
A Division of Cisco Systems, Inc.
2.4 GHz Wireless-G
802.11g
Broadband Router
WIRELESS
Model No.
WRT54GX
with SRX
User Guide
Wireless-G Broadband Router with SRX
Copyright and Trademarks
Specifications are subject to change without notice. Linksys is a registered trademark or trademark of Cisco
Systems, Inc. and/or its affiliates in the U.S. and certain other countries. Copyright © 2005 Cisco Systems, Inc. All
rights reserved. Other brands and product names are trademarks or registered trademarks of their respective
holders.
WARNING: This product contains chemicals, including lead, known
to the State of California to cause cancer, and birth defects or other
reproductive harm. Wash hands after handling.
How to Use This User Guide
This User Guide has been designed to make understanding networking with the Wireless-G Broadband Router
easier than ever. Look for the following items when reading this User Guide:
This checkmark means there is a note of interest and is
something you should pay special attention to while
using the Wireless-G Broadband Router.
This exclamation point means there is a caution or
warning and is something that could damage your
property or the Wireless-G Broadband Router.
This question mark provides you with a reminder about
something you might need to do while using the
Wireless-G Broadband Router.
In addition to these symbols, there are definitions for technical terms that are presented like this:
word: definition.
Also, each figure (diagram, screenshot, or other image) is provided with a figure number and description, like
this:
Figure 0-1: Sample Figure Description
Figure numbers and descriptions can also be found in the “List of Figures” section in the “Table of Contents”.
WRT54GX-UG-50225A BW
Wireless-G Broadband Router with SRX
Table of Contents
Chapter 1: Introduction
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Welcome
What’s in this Guide?
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2
Chapter 2: Planning Your Wireless Network
Network Topology
Ad-Hoc versus Infrastructure Mode
Network Layout
Chapter 3: Getting to Know the Wireless-G Broadband Router
The Back Panel
The Front Panel
Chapter 4: Connecting the Wireless-G Broadband Router
Overview
Hardware Installation for Connection to Your Broadband Modem
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Chapter 5: Configuring the Wireless-G Broadband Router
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Overview
The Setup Tab - Basic Setup
The Setup Tab - DDNS
The Setup Tab - MAC Address Clone
The Setup Tab - Advanced Routing
The Wireless Tab - Basic Wireless Settings
The Wireless Tab - Wireless Security
The Wireless Tab - Wireless MAC Filter
The Wireless Tab - Advanced Wireless Settings
The Security Tab - Firewall
The Access Restrictions Tab - Internet Access
The Applications and Gaming Tab - Port Range Forward
The Applications and Gaming Tab - Port Triggering
The Applications and Gaming Tab - DMZ
The Applications and Gaming Tab - UPnP Forwarding
The Administration Tab - Management
The Administration Tab - Log
The Administration Tab - Diagnostics
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Wireless-G Broadband Router with SRX
The Administration Tab - Factory Defaults
The Administration Tab - Firmware Upgrade
The Administration Tab - Config Management
The Status Tab - Router
The Status Tab - Local Network
The Status Tab - Wireless
The Status Tab - System Performance
Appendix A: Troubleshooting
Common Problems and Solutions
Frequently Asked Questions
Appendix B: Wireless Security
Security Precautions
Security Threats Facing Wireless Networks
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Appendix C: Upgrading Firmware
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Appendix D: Windows Help
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Appendix E: Finding the MAC Address and IP Address for Your Ethernet Adapter 56
Windows 98SE or Me Instructions
Windows 2000 or XP Instructions
For the Router’s Web-based Utility
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Appendix F: Glossary
Appendix G: Specifications
Appendix H: Warranty Information
Appendix I: Regulatory Information
Appendix J: Contact Information
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List of Figures
Figure 3-1: The Router’s Back Panel
Figure 3-2: The Router’s Reset Button
Figure 3-3: The Router’s LEDs
Figure 4-1: The Router’s Ports
Figure 5-1: Password Screen
Figure 5-2: Setup Tab - Basic Setup
Figure 5-3: DHCP Connection Type
Figure 5-4: Static IP Connection Type
Figure 5-5: PPPoE Connection Type
Figure 5-6: PPTP Connection Type
Figure 5-7: Telstra BigPond Connection Type
Figure 5-8: Optional Settings
Figure 5-9: Router IP
Figure 5-10: Network Address Server Settings
Figure 5-11: Time Setting
Figure 5-12: Setup Tab - DDNS
Figure 5-13: Setup Tab - MAC Address Clone
Figure 5-14: Setup Tab - Advanced Routing
Figure 5-15: Setup Tab - Advanced Routing - NAT Mode
Figure 5-16: Wireless Tab - Basic Wireless Settings
Figure 5-17: Wireless Tab - Wireless Security (WPA Pre-Shared Key)
Figure 5-18: Wireless Tab - Wireless Security (WPA RADIUS)
Figure 5-19: Wireless Tab - Wireless Security (WEP)
Figure 5-20: Wireless Tab - Wireless MAC Filter
Figure 5-21: Wireless Tab - Wireless MAC Filter - Networked Computers
Figure 5-22: Wireless Tab - Advanced Wireless Settings
Figure 5-23: Security Tab - Firewall
Figure 5-24: AAccess Restrictions Tab - Internet Access
Figure 5-25: Internet Policy Summary
Figure 5-26: List of PCs
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Figure 5-27: Port Services
Figure 5-28: Applications and Gaming Tab - Port Range Forward
Figure 5-29: Applications and Gaming Tab - Port Triggering
Figure 5-30: Applications and Gaming Tab - DMZ
Figure 5-31: Applications and Gaming Tab - UPnP Forwarding
Figure 5-32: Administration Tab - Management
Figure 5-33: Administration Tab - Log
Figure 5-34: Administration Tab - Diagnostics
Figure 5-35: Administration Tab - Factory Defaults
Figure 5-36: Administration Tab - Firmware Upgrade
Figure 5-37: Administration Tab - Config Management
Figure 5-38: Status Tab - Router
Figure 5-39: Status Tab - Local Network
Figure 5-40: Status Tab - Wireless
Figure 5-41: Status Tab - System Performance
Figure C-1: Upgrade Firmware
Figure E-1: IP Configuration Screen
Figure E-2: MAC Address/Adapter Address
Figure E-3: MAC Address/Physical Address
Figure E-4: MAC Address Filter List
Figure E-5: MAC Address Clone
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Chapter 1: Introduction
Welcome
Thank you for choosing the Linksys Wireless-G Broadband Router with SRX. The Wireless-G Broadband Router
with SRX will allow you to network wirelessly better than ever, sharing Internet access, files and fun, easily and
securely.
How does the Wireless-G Broadband Router with SRX do all of this? A router is a device that allows access to an
Internet connection over a network. With the Wireless-G Broadband Router with SRX, this access can be shared
over the four switched ports or via the wireless network, broadcast at either 11Mbps for Wireless-B or 54Mbps
for Wireless-G. In addition, WPA encryption provides greater security opportunities while the whole network is
protected through a Stateful Packet Inspection (SPI) firewall and NAT technology. All of these security features, as
well as full configurability, are accessed through the easy-to-use browser-based utility.
But what does all of this mean?
Networks are useful tools for sharing computer resources. You can access one printer from different computers
and access data located on another computer's hard drive. Networks are even used for playing multiplayer video
games. So, networks are not only useful in homes and offices, they can also be fun.
mbps: one million bits per second; a unit of
measurement for data transmission
browser: an application program that
provides a way to look at and interact with all
the information on the World Wide Web.
PCs on a wired network create a Local Area Network. They are connected with Ethernet cables, which is why the
network is called “wired”.
lan (Local Area Network): The
computers and networking products
that make up the network in your home
or office
PCs equipped with wireless cards or adapters can communicate without cumbersome cables. By sharing the
same wireless settings, within their transmission radius, they form a wireless network. The Wireless-G
Broadband Router with SRX bridges wireless networks of both 802.11b and 802.11g standards and wired
networks, allowing them to communicate with each other.
802.11b: an IEEE wireless networking standard
that specifies a maximum data transfer rate of
11Mbps and an operating frequency of 2.4GHz.
With your networks all connected, wired, wireless, and the Internet, you can now share files and Internet
access—and even play games. All the while, the Wireless-G Broadband Router with SRX protects your networks
from unauthorized and unwelcome users.
You should always use the Setup CD-ROM when you first install the Router. If you do not wish to run the Setup
Wizard on the Setup CD-ROM, then use the instructions in this Guide to help you connect the Wireless-G
Broadband Router with SRX, set it up, and configure it to bridge your different networks. These instructions
should be all you need to get the most out of the Wireless-G Broadband Router with SRX.
Chapter 1: Introduction
Welcome
802.11b: an IEEE wireless networking standard
that specifies a maximum data transfer rate of
54Mbps, an operating frequency of 2.4GHz, and
backward compatibility with 802.11b devices.
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Wireless-G Broadband Router with SRX
What’s in this Guide?
This user guide covers the steps for setting up and using the Wireless-G Broadband Router with SRX.
• Chapter 1: Introduction
This chapter describes the Router’s applications and this User Guide.
• Chapter 2: Planning Your Wireless Network
This chapter describes the basics of wireless networking.
• Chapter 3: Getting to Know the Wireless-G Broadband Router
This chapter describes the Router’s physical features.
• Chapter 4: Connecting the Wireless-G Broadband Router
This chapter instructs you on how to connect the Router to your network.
• Chapter 5: Configuring the Wireless-G Broadband Router
This chapter explains how to use the Router’s Web-Based Utility.
• Appendix A: Troubleshooting
This appendix describes some problems and solutions, as well as frequently asked questions, regarding
installation and use of the Wireless-G Broadband Router.
• Appendix B: Wireless Security
This appendix explains the risks of wireless networking and some solutions to reduce the risks.
• Appendix C: Upgrading Firmware
This appendix instructs you on how to upgrade the Router’s firmware should you need to do so.
• Appendix D: Windows Help
This appendix describes how you can use Windows Help for instructions about networking, such as installing
the TCP/IP protocol.
• Appendix E: Finding the MAC Address and IP Address for your Ethernet Adapter.
This appendix describes how to find the MAC address for your computer’s Ethernet adapter so you can use
the Router’s MAC filtering and/or MAC address cloning feature.
• Appendix F: Glossary
This appendix gives a brief glossary of terms frequently used in networking.
• Appendix G: Specifications
This appendix provides the Router’s technical specifications.
Chapter 1: Introduction
What’s in this Guide?
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Wireless-G Broadband Router with SRX
• Appendix H: Warranty Information
This appendix supplies the Router’s warranty information.
• Appendix I: Regulatory Information
This appendix supplies the Router’s regulatory information.
• Appendix J: Contact Information
This appendix provides contact information for a variety of Linksys resources, including Technical Support.
Chapter 1: Introduction
What’s in this Guide?
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Wireless-G Broadband Router with SRX
Chapter 2: Planning Your Wireless Network
Network Topology
A wireless local area network is exactly like a regular local area network (LAN), except that each computer in the
wireless network uses a wireless device to connect to the network. Computers in a wireless network share the
same frequency channel and SSID, which is an identification name shared by the wireless devices belonging to
the same wireless network.
Ad-Hoc versus Infrastructure Mode
Unlike wired networks, wireless networks have two different modes in which they may be set up: infrastructure
and ad-hoc. An infrastructure configuration is a wireless and wired network communicating to each other
through an access point. An ad-hoc configuration is wireless-equipped computers communicating directly with
each other. Choosing between these two modes depends on whether or not the wireless network needs to share
data or peripherals with a wired network or not.
If the computers on the wireless network need to be accessible by a wired network or need to share a peripheral,
such as a printer, with the wired network computers, the wireless network should be set up in Infrastructure
mode. The basis of Infrastructure mode centers around a wireless router or an access point, which serves as the
main point of communications in a wireless network. The Router transmits data to PCs equipped with wireless
network adapters, which can roam within a certain radial range of the Router. You can arrange the Router and
multiple access points to work in succession to extend the roaming range, and you can set up your wireless
network to communicate with your Ethernet hardware as well.
If the wireless network is relatively small and needs to share resources only with the other computers on the
wireless network, then the Ad-Hoc mode can be used. Ad-Hoc mode allows computers equipped with wireless
transmitters and receivers to communicate directly with each other, eliminating the need for a wireless router or
access point. The drawback of this mode is that in Ad-Hoc mode, wireless-equipped computers are not able to
communicate with computers on a wired network. And, of course, communication between the wirelessequipped computers is limited by the distance and interference directly between them.
network: a series of computers or devices
connected for the purpose of data sharing,
storage, and/or transmission between users.
ssid: your wireless network’s name.
ad-hoc: a group of wireless devices
communicating directly to each other
(peer-to-peer) without the use of an
access point.
Infrastructure: a wireless network
that is bridged to a wired network via
an access point.
adapter: a device that adds
network functionality to your PC
ethernet: IEEE standard network protocol that
specifies how data is placed on and retrieved
from a common transmission medium
access point: a device that allows wirelessequipped computers and other devices to
communicate with a wired network. Also used
to expand the range of a wireless network.
Network Layout
The Wireless-G Broadband Router has been specifically designed for use with both your 802.11b and 802.11g
products. Now, products using these standards can communicate with each other.
Chapter 2: Planning Your Wireless Network
Network Topology
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Wireless-G Broadband Router with SRX
The Wireless-G Broadband Router is compatible with all 802.11b and 802.11g adapters, such as the Notebook
Adapters (WPC54G, WPC11) for your laptop computers, PCI Adapter (WMP54G, WMP11) for your desktop PC, and
USB Adapter (WUSB54G, WUSB11) when you want to enjoy USB connectivity. The Router will also communicate
with the Wireless PrintServer (WPS54GU2, WPS11) and Wireless Ethernet Bridges (WET54G, WET11).
When you wish to connect your wireless network with your wired network, you can use the Wireless-G
Broadband Router’s four LAN ports. To add more ports, any of the Wireless-G Broadband Router's LAN ports can
be connected to any of Linksys's switches (such as the EZXS55W or EZXS88W).
With these, and many other, Linksys products, your networking options are limitless. Go to the Linksys website at
www.linksys.com for more information about products that work with the Wireless-G Broadband Router.
Chapter 2: Planning Your Wireless Network
Network Layout
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Wireless-G Broadband Router with SRX
Chapter 3: Getting to Know the Wireless-G Broadband
Router
The Back Panel
The Router's ports, where the cables are connected, are
located on the back panel.
Reset Button
There are two ways to reset the Router's
factory defaults. Either press the Reset
Button located on the bottom of the
Router, for approximately five seconds, or
restore the defaults from the
Administration tab - Factory Defaults in the
Router's Web-based Utility.
Internet
The Internet port in blue is where you will
connect your broadband Internet
connection.
1, 2, 3, 4
These yellow ports (1, 2, 3, 4) connect the
Router to PCs on your wired network and
other Ethernet network devices.
Power
Figure 3-2: The Router’s Reset Button
Important: Resetting the Router will erase all
of your settings (WEP Encryption, network
settings, etc.) and replace them with the
factory defaults. Do not reset the Router if you
want to retain these settings.
port: the connection point on a computer or networking
device used for plugging in cables or adapters
The Power port is where you will connect
the power adapter.
Figure 3-1: The Router’s Back Panel
Chapter 3: Getting to Know the Wireless-G Broadband Router
The Back Panel
broadband: an always-on, fast Internet connection
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Wireless-G Broadband Router with SRX
The Front Panel
The Router’s LEDs, where information about network activity is displayed, are located on the 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 po
Internet
Green. The Internet LED lights up when there is a connection made through the Internet
port.rt. A flashing LED indicates network activity over that port.
Wireless
Green. The Wireless LED lights up whenever there is a successful wireless connection. If the
LED is flashing, the Router is actively sending or receiving data over the network.
DMZ
Green. The DMZ LED indicates when the DMZ function is being used. This LED will remain lit
as long as DMZ is enabled.
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.
Figure 3-3: The Router’s LEDs
dmz: removes the Router's firewall protection from
one PC, allowing it to be "seen" from the Internet
Chapter 3: Getting to Know the Wireless-G Broadband Router
The Front Panel
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Wireless-G Broadband Router with SRX
Chapter 4: Connecting the Wireless-G Broadband Router
Overview
This chapter includes two sets of instructions. If the Wireless-G Broadband Router will be the only router in your
network, follow the instructions in “Hardware Installation for Connection to Your Broadband Modem.” If you want
to install the Wireless-G Broadband Router behind another router in your network, follow the instructions in
“Connecting One Router to Another.”
Hardware Installation for Connection to Your Broadband Modem
1. Power down your network devices.
2. Locate an optimum location for the Router. The best place for the Router is usually at the center of your
wireless network, with line of sight to all of your mobile stations.
3. Fix the direction of the antennas. Try to place the Router in a position that will best cover your wireless
network. Normally, the higher you place the antenna, the better the performance will be.
4. Connect a standard Ethernet network cable to the Router’s blue Internet port. Then, connect the other end of
the Ethernet cable to your cable or DSL broadband modem.
5. Connect your network PCs or Ethernet devices to the Router’s yellow ports using standard Ethernet network
cabling.
6. Connect the AC power adapter to the Router's Power port and the other end into an electrical outlet. Only use
the power adapter supplied with the Router. Use of a different adapter may result in product damage.
IMPORTANT: Make sure you use the power adapter that is supplied with the Router.
Use of a different power adapter could damage the Router.
Now that the hardware installation is complete, proceed to “Chapter 5: Configuring the Wireless-G
Broadband Router,” for directions on using the Router’s Web-Based Utility to configure the Router’s
settings for your network.
Chapter 4: Connecting the Wireless-G Broadband Router
Overview
Figure 4-1: The Router’s Ports
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Wireless-G Broadband Router with SRX
Chapter 5: Configuring the Wireless-G Broadband
Router
Overview
You should always use the Setup CD-ROM when first installing the Router. If you do not wish to run the Setup
Wizard on the Setup CD-ROM, you can use the Web-based Utility to configure the Router. For advanced users, you
may configure the Router’s advanced settings through the Web-based Utility.
This chapter will describe each web page in the Utility and each page’s key functions. The utility can be accessed
via your web browser through use of a computer connected to the Router. For a basic network setup, most users
will use these two screens of the Utility:
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.
HAVE YOU: Enabled TCP/IP on your PCs? PCs
communicate over the network with this protocol.
Refer to “Appendix D: Windows Help” for more
information on TCP/IP.
• Basic Setup. On the Basic Setup screen, enter the settings provided by your ISP.
• Management. Click the Administration tab and then the Management tab. The Router’s default password is
admin. To secure the Router, change the Password from its default.
There are seven 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.
To access the Web-based Utility, launch Internet Explorer or Netscape Navigator, and enter the Router’s default IP
address, 192.168.1.1, in the Address field. Then, press Enter.
A password request page will appear. (Non-Windows XP users will see a similar screen.) Leave the User Name
field blank. The first time you open the Web-based Utility, use the default password admin. (You can set a new
password from the Administration tab’s Management screen.) Click the OK button to continue.
Chapter 5: Configuring the Wireless-G Broadband Router
Overview
Figure 5-1: Password Screen
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The Setup Tab - Basic Setup
The first screen that appears displays the Setup tab. This allows you to change the Router's general settings.
Change these settings as described here and click the Save Settings button to apply your changes or Cancel
Changes to cancel your changes.
Internet Setup
The Internet Setup section configures the Router to your Internet connection. Most of this information can be
obtained through your ISP.
Internet Connection Type
Choose the type of Internet connection your ISP provides from the drop-down menu.
Figure 5-2: Setup Tab - Basic Setup
• 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.
Figure 5-3: DHCP Connection Type
Chapter 5: Configuring the Wireless-G Broadband Router
The Setup Tab - Basic Setup
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Wireless-G Broadband Router with SRX
• Static IP. If you are required to use a permanent IP address to connect to the Internet, select 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.
Gateway. Your ISP will provide you with the Gateway Address, which is the ISP server’s IP address.
Figure 5-4: Static IP Connection Type
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.
static ip address: a fixed address
assigned to a computer or device
connected to a network.
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. If you wish to activate Connect on Demand, click the radio
button. In the Max Idle Time field, enter the number of minutes you want to have elapsed before your Internet
connection terminates.
Figure 5-5: PPPoE Connection Type
Keep Alive Option: 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, click the radio button next to 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.
pppoe: a type of broadband connection that
provides authentication (username and
password) in addition to data transport
Chapter 5: Configuring the Wireless-G Broadband Router
The Setup Tab - Basic Setup
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Wireless-G Broadband Router with SRX
• PPTP. Point-to-Point Tunneling Protocol (PPTP) is a service that applies to connections in Europe only.
Specify Internet 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.
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.
User Name and Password. Enter the User Name and Password provided by your ISP.
Figure 5-6: PPTP Connection Type
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. If you wish to activate Connect on Demand, click the radio
button. In the Max Idle Time field, enter the number of minutes you want to have elapsed before your Internet
connection terminates.
Keep Alive Option: 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, click the radio button next to 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 BigPond. Telstra BigPond is a service that applies to connections in Australia only.
User Name and Password. Enter the User Name and Password provided by your ISP.
Heart Beat Server. This is the IP address that the Router has, when seen from the Internet. Your ISP will
provide you with the IP Address you need to specify here.
Chapter 5: Configuring the Wireless-G Broadband Router
The Setup Tab - Basic Setup
Figure 5-7: Telstra BigPond Connection Type
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Optional Settings
Some of these settings may be required by your ISP. Verify with your ISP before making any changes.
Router Name. In this field, you can type 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.
Figure 5-8: Optional Settings
packet: a unit of data sent over a network
MTU. MTU is the Maximum Transmission Unit. It specifies the largest packet size permitted for Internet
transmission. The default setting, Manual, allows you to enter the largest packet size that will be transmitted.
The recommended size, entered in the Size field, is 1492. You should leave this value in the 1200 to 1500 range.
To have the Router select the best MTU for your Internet connection, select Auto.
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.
Figure 5-9: Router IP
Chapter 5: Configuring the Wireless-G Broadband Router
The Setup Tab - Basic Setup
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Wireless-G Broadband Router with SRX
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, you must configure all
of your network PCs to connect to a DHCP server (the Router), and make sure there is no other DHCP server on
your network.
DHCP Server. DHCP is enabled by factory default. If you already have a DHCP server on your network, or you
don’t want a DHCP server, then click the Disable radio button (no other DHCP features will be available).
Figure 5-10: Network Address Server Settings
Starting IP Address. Enter a value for the DHCP server to start with when issuing 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 Starting IP Address 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.
The default is 0 minutes, which means one day.
Static DNS (1,2). 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, type that IP Address in one of these fields. You can type up to three DNS Server IP Addresses here. The
Router will use these for quicker access to functioning DNS servers.
Time Setting
Change the time zone in which your network functions from this pull-down menu. (You can even automatically
adjust for daylight savings time.)
Figure 5-11: Time Setting
Chapter 5: Configuring the Wireless-G Broadband Router
The Setup Tab - Basic Setup
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Wireless-G Broadband Router with SRX
The Setup Tab - 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
www.dyndns.org, a DDNS service providers.
DDNS Service. From this pull-down menu, enter the DDNS service with which you have membership.
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. This is the Router’s current IP Address as seen on the Internet.
Status. This displays the status of the DDNS connection.
Change these settings as described here and click the Save Settings button to apply your changes or Cancel
Changes to cancel your changes.
Chapter 5: Configuring the Wireless-G Broadband Router
The Setup Tab - DDNS
Figure 5-12: Setup Tab - DDNS
ddns: allows the hosting of a website, FTP server, or
e-mail server with a fixed domain name (e.g.,
www.xyz.com) and a dynamic IP address
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Wireless-G Broadband Router with SRX
The Setup Tab - MAC Address Clone
A MAC address is a 12-digit code assigned to a unique piece of hardware for identification. Some ISPs will
require you to register a MAC address in order to access the Internet. If you do not wish to re-register the MAC
address with your ISP, you may assign the MAC address you have currently registered with your ISP to the Router
with the MAC Address Clone feature.
Enable/Disable. To have the MAC Address cloned, click the radio button beside Enable.
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.
Change these settings as described here and click the Save Settings button to apply your changes or Cancel
Changes to cancel your changes.
Figure 5-13: Setup Tab - MAC Address Clone
Chapter 5: Configuring the Wireless-G Broadband Router
The Setup Tab - MAC Address Clone
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Wireless-G Broadband Router with SRX
The Setup Tab - Advanced Routing
This tab is used to set up the Router’s advanced functions. NAT Mode allows you to select the type(s) of advanced
functions you use. Static Routing sets up a fixed route to another network destination.
NAT Mode. Select the mode in which this Router will function. If this Router is hosting your network’s connection
to the Internet, select Enable. If another Router exists on your network, select Disable.
Dynamic Routing. With Dynamic Routing you can enable the Router to automatically adjust to physical changes
in the network’s layout. The Router, using the RIP protocol, determines the network packets’ route based on the
fewest number of hops between the source and the destination. The RIP protocol regularly broadcasts routing
information to other routers on the network.
RIP. To use dynamic routing, click the Disabled radio button.
Receive RIP Version. To use dynamic routing for reception of network data, select the protocol you want:
Both RIP v1 and v2, RIPv1, or RIPv2. If you do not want to use this feature, select None.
Transmit RIP Version. To use dynamic routing for transmission of network data, select the protocol you
want: Both RIP v1 and v2, RIPv1, or RIPv2. If you do not want to use this feature, select None.
Figure 5-14: Setup Tab - Advanced Routing
default gateway: a device that forwards
Internet traffic from your local area network
Static Routing. 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), the WAN (Internet), or Loopback (a dummy network in which one PC acts like a
network—necessary for certain software programs).
Figure 5-15: Setup Tab - Advanced Routing - NAT Mode
Click the Show Routing Table button to view the Static Routes you’ve already set up.
Chapter 5: Configuring the Wireless-G Broadband Router
The Setup Tab - Advanced Routing
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Wireless-G Broadband Router with SRX
Change these settings as described here and click the Save Settings button to apply your changes or Cancel
Changes to cancel your changes.
The Wireless Tab - Basic Wireless Settings
The basic settings for wireless networking are set on this screen.
Wireless Network Mode. From this drop-down menu, you can select the wireless standards running on your
network. If you have both 802.11g and 802.11b devices in your network, keep the default setting, Mixed. If you
have only 802.11g devices, select G-Only. If you have only 802.11b devices, select B-Only. If you do not have any
802.11g and 802.11b devices in your network, select Disable. SRX works automatically with all settings,
providing the added bonus of increased speed across your entire network and even greater speed when using
SRX products only.
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
characters (use any of the characters on the keyboard). Make sure this setting is the same for all points in your
wireless network. For added security, you should change the default SSID (linksys) to a unique name.
Figure 5-16: Wireless Tab - Basic Wireless Settings
Wireless Channel. Select the appropriate 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 setting,
Enable. If you do not want to broadcast the Router's SSID, then select Disable.
QoS Configuration. Quality of Service (QoS) ensures better service to high-priority types of network traffic,
which may involve demanding, real-time applications, such as videoconferencing.
ACK Mode. This setting prioritizes QoS for users who also have ACK Mode enabled. Users with Immediate ACK
(the default setting) will experience reliable connectivity for normal network use. Burst ACK is faster but less
reliable and may also affect long-range wireless performance. The No ACK setting disables the ACK feature.
Clients utilizing ACK must have their wireless adapter on the same setting as the Router.
802.11e QoS. This setting prioritized QoS for uses who have this setting enabled on their wireless adapter.
Change these settings as described here and click the Save Settings button to apply your changes or Cancel
Changes to cancel your changes.
Chapter 5: Configuring the Wireless-G Broadband Router
The Wireless Tab - Basic Wireless Settings
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Wireless-G Broadband Router with SRX
The Wireless Tab - Wireless Security
The Wireless Security settings configure the security of your wireless network. There are four wireless security
mode options supported by the Router: WPA Pre-Shared Key, WPA RADIUS, and WEP. (WPA stands for Wi-Fi
Protected Access, which is a security standard stronger than WEP encryption. WEP stands for Wired Equivalent
Privacy, while RADIUS stands for Remote Authentication Dial-In User Service.) These three are briefly discussed
here. For detailed instructions on configuring wireless security for the Router, turn to “Appendix B: Wireless
Security.”
IMPORTANT: If you are using WPA, always
remember that each device in your wireless
network MUST use the same WPA method
and shared key, or else the network will not
function properly.
WPA Pre-Shared Key. WPA gives you two encryption methods, TKIP and AES, with dynamic encryption keys.
Select the type of algorithm, TKIP or AES. Enter a WPA Shared Key of 8-63 characters. Then enter a Group Key
Renewal period, which instructs the Router how often it should change the encryption keys.
WPA RADIUS. 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.) First, select the type of WPA algorithm you want to use, TKIP
or AES. Enter the RADIUS server’s IP Address and port number, along with a key shared between the Router and
the server. Last, enter a Key Renewal Timeout, which instructs the Router how often it should change the
encryption keys.
Figure 5-17: Wireless Tab - Wireless Security (WPA
Pre-Shared Key)
Figure 5-18: Wireless Tab - Wireless Security
(WPA RADIUS)
Chapter 5: Configuring the Wireless-G Broadband Router
The Wireless Tab - Wireless Security
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Wireless-G Broadband Router with SRX
WEP. WEP is a basic encryption method, which is not as secure as WPA. To use WEP, select a Default Transmit Key
(choose which Key to use), and a level of WEP encryption, 64 bits 10 hex digits or 128 bits 26 hex digits. Then
either generate a WEP key using the Passphrase or enter the WEP key manually.
Change these settings as described here and click the Save Settings button to apply your changes or Cancel
Changes to cancel your changes. For detailed instructions on configuring wireless security for the Router, turn to
“Appendix B: Wireless Security.”
IMPORTANT: If you are using WEP
encryption, always remember that each
device in your wireless network MUST use
the same WEP encryption method and
encryption key, or else your wireless network
Figure 5-19: Wireless Tab - Wireless Security
(WEP)
Chapter 5: Configuring the Wireless-G Broadband Router
The Wireless Tab - Wireless Security
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Wireless-G Broadband Router with SRX
The Wireless Tab - Wireless MAC Filter
Wireless access can be filtered by using the MAC addresses of the wireless devices transmitting within your
network’s radius.
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, select Disable.
Prevent. Clicking this button will block wireless access by MAC Address.
Permit Only. Clicking this button will allow wireless access by MAC Address.
There are 50 fields provided in which you can list users, by MAC Address, whose access you wish to provide or
block. Just enter the MAC Address for the PC whose access you want to filter in one of the fields .For a more
convenient way to add MAC addresses, click the Select MAC Address From Networked Computers button.
The Networked Computers screen will appear. Select the MAC Addresses you want. Then click the Select button.
Click the Refresh button if you want to refresh the screen. Click the Close button to return to the previous
screen.
Change these settings as described here and click the Save Settings button to apply your changes or Cancel
Changes to cancel your changes.
Figure 5-20: Wireless Tab - Wireless MAC Filter
Figure 5-21: Wireless Tab - Wireless MAC Filter - Networked
Computers
Chapter 5: Configuring the Wireless-G Broadband Router
The Wireless Tab - Wireless MAC Filter
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Wireless-G Broadband Router with SRX
The Wireless Tab - Advanced Wireless Settings
This tab is used to set up the Router’s advanced wireless functions. These settings should only be adjusted by an
expert administrator as incorrect settings can reduce wireless performance.
Basic Rate Set. 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, when the Router can transmit at all standard wireless rates
(1-2Mbps, 5.5Mbps, 11Mbps, 18Mbps, and 24Mbps). Other options are 1-2Mbps, for use with older wireless
technology, and All, when the Router can transmit 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 value 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.
Figure 5-22: Wireless Tab - Advanced Wireless Settings
cts (clear to send): a signal sent by a wireless
device, signifying that it is ready to receive data
Beacon Interval. The default value is 100. Enter a value between 1 and 65,535 milliseconds. The Beacon Interval
value indicates the frequency interval of the beacon. A beacon is a packet broadcast by the Router to synchronize
the wireless network.
beacon interval: data transmitted on your wireless
network that keeps the network synchronized
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 value is 1.
dtim: a message included in data packets
that can increase wireless efficiency.
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.
Chapter 5: Configuring the Wireless-G Broadband Router
The Wireless Tab - Advanced Wireless Settings
fragmentation: breaking a packet into smaller units
when transmitting over a network medium that
cannot support the original size of the packet.
22
Wireless-G Broadband Router with SRX
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.
Preamble Type. The preamble defines the length of the CRC block for communication between the Router and
the roaming Network Card. (High network traffic areas should use the shorter preamble type.) Select the
appropriate preamble type, Long Preamble (default) or Short Preamble.
Network Density. This setting is a reflection of the Router’s range. Setting the density to Low provides you with
a greater range. Setting the density to High gives you a lower range. The default setting is Medium.
Change these settings as described here and click the Save Settings button to apply your changes or Cancel
Changes to cancel your changes.
The Security Tab - Firewall
Firewall Protection. Enable this feature to employ Stateful Packet Inspection (SPI) for more detailed review of
data packets entering your network environment.
Block WAN Ping. Enable the Block WAN Ping feature by checking the box beside Block WAN Ping and you can
prevent your network from being “pinged,” or detected, by other Internet users. The Block WAN Ping feature also
reinforces your network security by hiding your network ports. Both functions of the Block WAN Ping feature
make it more difficult for outside users to work their way into your network. This feature is enabled by default.
VPN Passthrough. These settings allow VPN tunnels using IPSec, PPTP, or L2TP protocols to pass through the
Router’s firewall. 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, click Enable. 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, click Enable. Layer 2 Tunneling Protocol (L2TP) 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,
click Enable.
Change these settings as described here and click the Save Settings button to apply your changes or Cancel
Changes to cancel your changes.
Chapter 5: Configuring the Wireless-G Broadband Router
The Security Tab - Firewall
Figure 5-23: Security Tab - Firewall
firewall: a set of related programs located at a
network gateway server that protects the resources
of a network from users from other networks.
23
Wireless-G Broadband Router with SRX
The Access Restrictions Tab - Internet Access
The Internet Access screen allows you to block or allow specific kinds of Internet usage and traffic, such as
Internet access, designated services, websites, and inbound traffic during specific days and times.
Internet Access Policy. Access can be managed by a policy. Use the settings on this screen to establish an
access policy (after the Save Settings button 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 the Delete button. To view
all the policies, click the Summary button. (Policies can be deleted from the Summary screen by selecting the
policy or policies and clicking the Delete button. To return to the Internet Access tab, click the Close button.)
Status. Policies are disabled by default. To enable a policy, select the policy number from the drop-down menu,
and click the radio button beside Enable.
You can create a policy to manage Internet access.
To create an Internet Access policy:
1. Select a number from the Internet Access Policy drop-down menu.
Figure 5-24: AAccess Restrictions Tab - Internet Access
2. To enable this policy, click the radio button beside Enable.
3. Enter a Policy Name in the field provided.
4. Click the Edit List button to select which PCs will be affected by the policy. The List of PCs screen will appear.
You can select a PC by MAC Address or IP Address. You can also enter a range of IP Addresses if you want this
policy to affect a group of PCs. After making your changes, click the Save Settings button to apply your
changes or Cancel Changes to cancel your changes. Then click the Close button.
Figure 5-25: Internet Policy Summary
Chapter 5: Configuring the Wireless-G Broadband Router
The Access Restrictions Tab - Internet Access
24
Wireless-G Broadband Router with SRX
5. Click the appropriate option, Deny or Allow, depending on whether you want to block or allow Internet access
for the PCs you listed on the List of PCs screen (shown in Figure 5-26).
6. Decide which days and what times you want this policy to be enforced. Select the individual days during
which the policy will be in effect, or select Everyday. Then enter a range of hours and minutes during which
the policy will be in effect, or select 24 Hours.
7. You can filter access to various services accessed over the Internet, such as FTP or telnet, by selecting
services from the drop-down menus next to Blocked Services. (You can block up to 20 services.)
Then enter the range of ports you want to filter.
If the service you want to block is not listed or you want to edit a service’s settings, then click the Add/Edit
Service button. Then the Port Services screen will appear.
To add a service, enter the service’s name in the Service Name field. Select its protocol from the Protocol
drop-down menu, and enter its range in the Port Range fields. Then click the Add button.
Figure 5-26: List of PCs
To modify a service, select it from the list on the right. Change its name, protocol setting, or port range. Then
click the Modify button.
To delete a service, select it from the list on the right. Then click the Delete button.
When you are finished making changes on the Port Services screen, click the Apply button to save changes.
If you want to cancel your changes, click the Cancel button. To close the Port Services screen and return to
the Access Restrictions screen, click the Close button.
8. If you want to block websites with specific URL addresses, enter each URL in a separate field next to Website
Blocking by URL Address.
9. If you want to block websites using specific keywords, enter each keyword in a separate field next to Website
Blocking by Keyword.
10. Click the Save Settings button to save the policy’s settings. To cancel the policy’s settings, click the Cancel
Changes button.
Figure 5-27: Port Services
ftp: a protocol used to transfer files over a TCP/IP network
telnet: a user command and TCP/IP
protocol used for accessing remote PCs
url: the address of a file located on the Internet
Chapter 5: Configuring the Wireless-G Broadband Router
The Access Restrictions Tab - Internet Access
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Wireless-G Broadband Router with SRX
The Applications and Gaming Tab - Port Range Forward
The Applications and Gaming Tab allows you to set up public services on your network, such as web servers, ftp
servers, e-mail servers, or other specialized Internet applications. (Specialized Internet applications are any
applications that use Internet access to perform functions such as videoconferencing or online gaming. Some
Internet applications may not require any forwarding.)
To forward a port, enter the information on each line for the criteria required. Descriptions of each criteria are
described here.
Application. In this field, enter the name you wish to give the application. Each name can be up to 12 characters.
Start/End. This is the port range. Enter the number that starts the port range under Start and the number that
ends the range under End.
Protocol. Enter the protocol used for this application, either TCP or UDP, or Both.
IP Address. For each application, enter the IP Address of the PC running the specific application.
Figure 5-28: Applications and Gaming Tab Port Range Forward
Enable. Click the Enable checkbox to enable port forwarding for the relevant application.
Change these settings as described here and click the Save Settings button to apply your changes or Cancel
Changes to cancel your changes.
The Applications and Gaming Tab - Port Triggering
Port Triggering is used for special applications that can request a port to be opened on demand. For this feature,
the Gateway will watch outgoing data for specific port numbers. The Gateway will remember the IP address of the
computer that sends a transmission requesting data, so that when the requested data returns through the
Gateway, the data is pulled back to the proper computer by way of IP address and port mapping rules.
• Application. Enter the name you wish to give each application.
• Start Port and End Port. Enter the starting and ending Triggered Range numbers and the Forwarded Range
numbers of the port you wish to forward.
After entering the information, click the Enable box to enable that port.
When finished making your changes on this tab, click the Save Settings button to save these changes, or click
the Cancel Changes button to undo your changes.
Chapter 5: Configuring the Wireless-G Broadband Router
The Applications and Gaming Tab - Port Range Forward
Figure 5-29: Applications and Gaming Tab Port Triggering
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Wireless-G Broadband Router with SRX
The Applications and Gaming Tab - DMZ
The DMZ feature allows one network user to be exposed to the Internet for use of a special-purpose service such
as Internet gaming or videoconferencing. DMZ hosting forwards all the ports at the same time to one PC. The Port
Range Forward feature is more secure because it only opens the ports you want to have opened, while DMZ
hosting opens all the ports of one computer, exposing the computer to the Internet.
Any PC whose port is being forwarded must have its DHCP client function disabled and should have a new static
IP address assigned to it because its IP address may change when using the DHCP function.
To expose one PC, select Enable. Then, enter the computer's IP address in the DMZ Host IP Address field.
Change these settings as described here and click the Save Settings button to apply your changes or Cancel
Changes to cancel your changes.
Figure 5-30: Applications and Gaming Tab - DMZ
The Applications and Gaming Tab - UPnP Forwarding
The UPnP Forwarding screen provides options for customization of port services for applications. Make sure that
you have UPnP enabled on your computer to use UPnP Forwarding.
UPnP Forwarding
Application. In this field, enter the name you wish to give the application. Each name can be up to 12
characters.
Protocol. Enter the protocol used for this application, either TCP or UDP, or Both.
External Port. Enter the number of the external port used by the server. Check with the Internet application
documentation for more information.
Internal Client. For each application, enter the IP Address of the server that you want the Internet users to be
able to access.
Internal Port. Enter the number of the internal port used by the server. Check with the Internet application
software documentation for more information.
Enabled. Click the Enabled checkbox to enable UPnP forwarding for the relevant application.
Chapter 5: Configuring the Wireless-G Broadband Router
The Applications and Gaming Tab - DMZ
Figure 5-31: Applications and Gaming Tab - UPnP
Forwarding
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Wireless-G Broadband Router with SRX
When you have finished making changes to the screen, click the Save Settings button to save the changes, or
click the Cancel Changes button to undo your changes. For help information, click More.
The Administration Tab - Management
This section of the Administration tab allows the network’s administrator to manage specific Router functions for
access and security.
Local Router Access. You can change the Router’s password from here. Enter a new Router password and then
type it again in the Re-enter to confirm field to confirm.
Remote Router Access. To access the Router remotely, from outside the network, verify that Enable is selected.
Then, enter the port number that will be open to outside access. You will need to enter the Router’s password
when accessing the Router this way, as usual.
SNMP
Simple Network Management Protocol provides network administrators with the ability to monitor the status of
the Router and receive notification of any critical events as they occur on the network. To enable SNMP, check the
Enabled box. To configure SNMP, complete all fields. To disable SNMP, remove the checkmark.
Contact. Enter the name of the network administrator for the Router, and a contact number or e-mail address.
Device Name. Enter the name of the Router.
Location. Enter the location of the Router. For example, you could include the name of the building, floor number,
and room location, such as Head Office - Floor 5 - Networking 3.
Figure 5-32: Administration Tab - Management
Get Community. Enter the password that allows read-only access to the Router’s SNMP information. The default
name is public.
Set Community. Enter the password that allows read/write access to the Router’s SNMP information.The default
name is private. A name must be entered in this field.
SNMP Trap-Community. Enter the password required by the remote host computer that will receive trap
messages or notices sent by the Router.
SNMP Trap-Destination. Enter the IP address of the remote host computer that will receive the trap messages.
Chapter 5: Configuring the Wireless-G Broadband Router
The Administration Tab - Management
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Wireless-G Broadband Router with SRX
UPnP
UPnP. UPnP allows Windows XP and Windows Me to automatically configure the Router for various Internet
applications, such as gaming and videoconferencing.To enable UPnP, check the Enabled box. Because allowing
this may present a risk to security, this feature is disabled by default.
Change these settings as described here and click the Save Settings button to apply your changes or Cancel
Changes to cancel your changes.
The Administration Tab - Log
When you click the Administration tab, you will see the Log screen. The Log screen provides you with options for
system, Firewall, WAN Connection, and New Traffic logs. of all incoming and outgoing URLs or IP addresses for
your Internet connection. To enable the Router’s log function, click the radio button beside Enabled, and check
the box next to the type of log that you want.Then, click Show Log to view the log. If you do not wish to have logs,
click the radio button beside Disabled.
System Log.You can view logs for events relating to your system: Unauthorized Login Attempt, Update Time By
NTP Client, and Authorized Login.
Figure 5-33: Administration Tab - Log
Firewall Log. You can view logs for specific types of Internet attacks and events: Syn Flooding, IP Spoofing, Deny
Policies, Allow Policies, Content Filtering, ICMP Redirect, TCP Null Scan, Smurf Attack, RIP Detect, UDP Flood, and
ICMP flood.
WAN Connection Log. You can view outgoing connection logs for: Failed Connection and Successful Connection
New Traffic Log. You can view outgoing and Incoming traffic logs: WAN to LAN and LAN to WAN.
When you have finished making changes on this screen, click the Save Settings button to save the changes, or
click the Cancel Changes button to undo your changes.
The Administration Tab - Diagnostics
The diagnostic tests (Ping and Traceroute) allow you to check the connections of your network components.
Ping Test. The Ping test will check the status of a connection. To start the test, enter the IP address of the PC
whose connection you wish to test, how many times you wish to test it, and the size of the packet for testing.
Then, click the Start Test button. The test field will show if the test was successful. To stop the test, click the
Abort Test button. Click the Clear button to clear the field.
Chapter 5: Configuring the Wireless-G Broadband Router
The Administration Tab - Log
Figure 5-34: Administration Tab - Diagnostics
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Wireless-G Broadband Router with SRX
Traceroute Test. To test the performance of a connect, enter the address of the PC whose connection you wish
to test and click the Start Test button. The test field will show if the test was successful. To stop the test, click
the Abort Test button. Click the Clear button to clear the screen.
Change these settings as described here and click the Save Settings button to apply your changes or Cancel
Changes to cancel your changes.
The Administration Tab - Factory Defaults
Click the Yes button to reset all configuration settings to their default values, and then click the Save Settings
button. Any settings you have saved will be lost when the default settings are restored. This feature is disabled
by default.
Figure 5-35: Administration Tab - Factory Defaults
The Administration Tab - Firmware Upgrade
Firmware can be upgraded by clicking the Upgrade button after browsing for the firmware, which you can
download from the Linksys website. Do not upgrade your firmware unless you are experiencing problems with
the Router. For more information about upgrading firmware, refer to “Appendix C: Upgrading Firmware”.
Figure 5-36: Administration Tab - Firmware Upgrade
firmware: the programming code that runs a networking device
download: to receive a file transmitted over a network
Chapter 5: Configuring the Wireless-G Broadband Router
The Administration Tab - Factory Defaults
30
Wireless-G Broadband Router with SRX
The Administration Tab - Config Management
The Config Management screen allows you to backup the Router’s settings and restore them later. Simply, click
the Backup button and save the config file to your hard drive. When you wish to restore the config file, click the
Browse button to locate the file and then click the Restore button.
Figure 5-37: Administration Tab - Config Management
The Status Tab - Router
The Router screen on the Status Tab displays the Router’s current status.
Hardware Version. This shows the Router’s model number.
Firmware Version. This is the Router’s current firmware version.
Boot Version. This shows the Router’s BIOS version.
Current Time. This shows the time, as you set on the Setup Tab.
MAC Address. This is the Router’s MAC Address, as seen by your ISP.
Figure 5-38: Status Tab - Router
Local MAC Address. This is the MAC Address for the Router’s LAN ports.
System Up Time. This is the amount of time since the Router was first booted up.
isp: your internet provider
Connection Type. This shows the connection type you set on the Setup Tab. Connection settings then follow.
mac address: the unique address that a
manufacturer assigns to each networking device.
Chapter 5: Configuring the Wireless-G Broadband Router
The Administration Tab - Config Management
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Wireless-G Broadband Router with SRX
The Status Tab - Local Network
The Local Network screen on the Status Tab displays the status of your network.
MAC Address. This is the Router’s MAC Address, as seen on your local, Ethernet network.
IP Address. This shows the Router’s IP Address, as it appears on your local, Ethernet network.
Subnet Mask. When the Router is using a Subnet Mask, it is shown here.
Figure 5-39: Status Tab - Local Network
DHCP Server. If you are using the Router as a DHCP server, that will be displayed here.
Start IP Address. For the range of IP Addresses used by devices on your local, Ethernet network, the beginning
of that range is shown here.
subnet mask: an address code that
determines the size of the network
End IP Address. For the range of IP Addresses used by devices on your local, Ethernet network, the end of that
range is shown here.
DHCP Clients Table. Clicking this button will open a screen to show you which PCs are utilizing the Router as a
DHCP server. You can delete PCs from that list, and sever their connections, by checking a Delete box and
clicking the Delete button.
Chapter 5: Configuring the Wireless-G Broadband Router
The Status Tab - Local Network
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Wireless-G Broadband Router with SRX
The Status Tab - Wireless
The Wireless screen on the Status Tab displays the status of your wireless network.
MAC Address. This is the Router’s MAC Address, as seen on your local, wireless network.
Mode. As selected from the Wireless tab, this will display the wireless mode (Mixed, G-Only, or Disabled) used by
the network.
SSID. As entered on the Wireless tab, this will display the wireless network name or SSID.
Figure 5-40: Status Tab - Wireless
Channel. As entered on the Wireless tab, this will display the channel on which your wireless network is
broadcasting.
Encryption Mode. As selected on the Security Tab, this will display what type of encryption the Router uses for
security.
encryption: encoding data transmitted in a network
Chapter 5: Configuring the Wireless-G Broadband Router
The Status Tab - Wireless
33
Wireless-G Broadband Router with SRX
The Status Tab - System Performance
The System Performance screen displays status information about network traffic for the Internet, wireless
activities, and wired connectivity.
System Performance
Internet/Wireless
Statistics for the network traffic on the Internet connection and wireless connectivity are shown in two separate
columns.
IP Address. The IP address of the Router’s interface is displayed here.
MAC Address. The MAC address of the Router’s interface is shown here.
Connection. The status of the connection is shown here.
Packets Received. The number of packets received is displayed here.
Packets Sent. The number of packets sent is displayed here.
Bytes Received. The number of bytes received is shown here.
Bytes Sent. The number of bytes sent is shown here.
Error Packets Received. The number of error packets received is displayed here.
Figure 5-41: Status Tab - System Performance
Dropped Packets Received. The number of dropped packets received is displayed here.
LAN
Statistics for the network traffic on each of the four LAN ports are shown in four separate columns.
IP Address. The IP address of the Router’s interface is displayed here.
MAC Address. The MAC address of the Router’s interface is shown here.
Connection. The status of the connection is shown here.
Packets Received. The number of packets received is displayed here.
Chapter 5: Configuring the Wireless-G Broadband Router
The Status Tab - System Performance
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Wireless-G Broadband Router with SRX
Packets Sent. The number of packets sent is displayed here.
Bytes Received. The number of bytes received is shown here.
Bytes Sent. The number of bytes sent is shown here.
Error Packets Received. The number of error packets received is displayed here.
Dropped Packets Received. The number of dropped packets received is displayed here.
Click the Refresh button to update the on-screen information. Help information is shown on the right-hand side
of the screen.
Chapter 5: Configuring the Wireless-G Broadband Router
The Status Tab - System Performance
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Wireless-G Broadband Router with SRX
Appendix A: Troubleshooting
This appendix consists of two parts: “Common Problems and Solutions” and “Frequently Asked Questions.”
Provided are possible solutions to problems that may occur during the installation and operation of the Router.
Read the descriptions below to help you solve your problems. If you can’t find an answer here, check the Linksys
website at www.linksys.com.
Common Problems and Solutions
1. I’m trying to access the Router’s Web-based Utility, but I do not see the login screen. Instead, I see a
screen saying, “404 Forbidden.”
If you are using Windows Explorer, perform the following steps until you see the Web-based Utility’s login
screen (Netscape Navigator will require similar steps):
1. Click File. Make sure Work Offline is NOT checked.
2. Press CTRL + F5. This is a hard refresh, which will force Windows Explorer to load new webpages,
not cached ones.
3. Click Tools. Click Internet Options. Click the Security tab. Click the Default level button. Make sure
the security level is Medium or lower. Then click the OK button.
2. I need to set a static IP address on a PC.
You can assign a static IP address to a PC by performing the following steps:
• For Windows 98SE and Me:
1. Click Start, Settings, and Control Panel. Double-click Network.
2. In The following network components are installed box, select the TCP/IP-> associated with your
Ethernet adapter. If you only have one Ethernet adapter installed, you will only see one TCP/IP line
with no association to an Ethernet adapter. Highlight it and click the Properties button.
3. In the TCP/IP properties window, select the IP address tab, and select Specify an IP address. Enter
a unique IP address that is not used by any other computer on the network connected to the Router.
Make sure that each IP address is unique for each PC or network device.
4. Click the Gateway tab, and in the New Gateway prompt, enter 192.168.1.1, which is the default IP
address of the Router. Click the Add button to accept the entry.
5. Click the DNS tab, and make sure the DNS Enabled option is selected. Enter the Host and Domain
names (e.g., John for Host and home for Domain). Enter the DNS entry provided by your ISP. If your ISP
has not provided the DNS IP address, contact your ISP to get that information or go to its website for
the information.
6. Click the OK button in the TCP/IP properties window, and click Close or the OK button for the Network
window.
7. Restart the computer when asked.
Appendix A: Troubleshooting
Common Problems and Solutions
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Wireless-G Broadband Router with SRX
• For Windows 2000:
1. Click Start, Settings, and Control Panel. Double-click Network and Dial-Up Connections.
2. Right-click the Local Area Connection that is associated with the Ethernet adapter you are using, and
select the Properties option.
3. In the Components checked are used by this connection box, highlight Internet Protocol (TCP/IP),
and click the Properties button. Select Use the following IP address option.
4. Enter a unique IP address that is not used by any other computer on the network connected to the
Router.
5. Enter the Subnet Mask, 255.255.255.0.
6. Enter the Default Gateway, 192.168.1.1 (Router’s default IP address).
7. Toward the bottom of the window, select Use the following DNS server addresses, and enter the
Preferred DNS server and Alternative DNS server (provided by your ISP). Contact your ISP or go on its
website to find the information.
8. Click the OK button in the Internet Protocol (TCP/IP) Properties window, and click the OK button in the
Local Area Connection Properties window.
9. Restart the computer if asked.
• For Windows XP:
The following instructions assume you are running Windows XP with the default interface. If you are using
the Classic interface (where the icons and menus look like previous Windows versions), please follow the
instructions for Windows 2000.
1. Click Start and Control Panel.
2. Click the Network and Internet Connections icon and then the Network Connections icon.
3. Right-click the Local Area Connection that is associated with the Ethernet adapter you are using,
and select the Properties option.
4. In the This connection uses the following items box, highlight Internet Protocol (TCP/IP). Click the
Properties button.
5. Enter a unique IP address that is not used by any other computer on the network connected to the
Router.
6. Enter the Subnet Mask, 255.255.255.0.
7. Enter the Default Gateway, 192.168.1.1 (Router’s default IP address).
8. Toward the bottom of the window, select Use the following DNS server addresses, and enter the
Preferred DNS server and Alternative DNS server (provided by your ISP). Contact your ISP or go on its
website to find the information.
9. Click the OK button in the Internet Protocol (TCP/IP) Properties window. Click the OK button in the
Local Area Connection Properties window.
3. I want to test my Internet connection.
A Check your TCP/IP settings.
For Windows 98SE, Me, 2000, and XP:
Appendix A: Troubleshooting
Common Problems and Solutions
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Wireless-G Broadband Router with SRX
• Refer to “Appendix D: Windows Help” for details. Make sure Obtain IP address automatically is selected in
the settings.
B Open a command prompt.
For Windows 98SE and Me:
• Click Start and Run. In the Open field, type command. Press the Enter key or click the OK button.
For Windows 2000 and XP:
• Click Start and Run. In the Open field, type cmd. Press the Enter key or click the OK button. In the
command prompt, type ping 192.168.1.1 and press the Enter key.
• If you get a reply, the computer is communicating with the Router.
• If you do NOT get a reply, please check the cable, and make sure Obtain an IP address automatically is
selected in the TCP/IP settings for your Ethernet adapter.
C In the command prompt, type ping followed by your Internet or WAN IP address and press the Enter key.
The Internet or WAN IP Address can be found on the Status screen of the Router’s web-based utility. For
example, if your Internet or WAN IP address is 1.2.3.4, you would enter ping 1.2.3.4 and press the Enter key.
• If you get a reply, the computer is connected to the Router.
• If you do NOT get a reply, try the ping command from a different computer to verify that your original
computer is not the cause of the problem.
D In the command prompt, type ping www.yahoo.com and press the Enter key.
• If you get a reply, the computer is connected to the Internet. If you cannot open a webpage, try the ping
command from a different computer to verify that your original computer is not the cause of the problem.
• If you do NOT get a reply, there may be a problem with the connection. Try the ping command from a
different computer to verify that your original computer is not the cause of the problem.
5. I am not getting an IP address on the Internet with my Internet connection.
• Refer to “Problem #2, I want to test my Internet connection” to verify that you have connectivity.
• If you need to register the MAC address of your Ethernet adapter with your ISP, please see “Appendix E:
Finding the MAC address and IP Address for Your Ethernet Adapter.” If you need to clone the MAC address
of your Ethernet adapter onto the Router, see the System section of “Chapter 5: Configuring the
Wireless-G Broadband Router” for details.
• Make sure you are using the right Internet connection settings. Contact your ISP to see if your Internet
connection type is DHCP, Static IP Address, or PPPoE (commonly used by DSL consumers). Please refer to
the Setup section of “Chapter 5: Configuring the Wireless-G Broadband Router” for details on Internet
connection settings.
• Make sure you have the right cable. Check to see if the Internet column has a solidly lit Link/Act LED.
• Make sure the cable connecting from your cable or DSL modem is connected to the Router’s Internet port.
Verify that the Status page of the Router’s web-based utility shows a valid IP address from your ISP.
• Turn off the computer, Router, and cable/DSL modem. Wait 30 seconds, and then turn on the Router,
cable/DSL modem, and computer. Check the Status tab of the Router’s web-based utility to see if you get
an IP address.
Appendix A: Troubleshooting
Common Problems and Solutions
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Wireless-G Broadband Router with SRX
6. I am not able to access the Setup page of the Router’s web-based utility.
• Refer to “Problem #2, I want to test my Internet connection” to verify that your computer is properly
connected to the Router.
• Refer to “Appendix E: Finding the MAC Address and IP address for Your Ethernet Adapter” to verify that
your computer has an IP Address, Subnet Mask, Gateway, and DNS.
• Set a static IP address on your system; refer to “Problem #1: I need to set a static IP address.”
• Refer to “Problem #10: I need to remove the proxy settings or the dial-up pop-up window (for PPPoE
users).”
7. I need to set up a server behind my Router and make it available to the public.
To use a server like a web, ftp, or mail server, you need to know the respective port numbers they are using.
For example, port 80 (HTTP) is used for web; port 21 (FTP) is used for FTP, and port 25 (SMTP outgoing) and
port 110 (POP3 incoming) are used for the mail server. You can get more information by viewing the
documentation provided with the server you installed.
Follow these steps to set up port forwarding through the Router’s web-based utility. We will be setting up
web, ftp, and mail servers.
1. Access the Router’s web-based utility by going to http://192.168.1.1 or the IP address of the Router.
Go to the Applications & Gaming => Port Forwarding tab.
2. Enter any name you want to use for the Customized Application.
3. Enter the External Port range of the service you are using. For example, if you have a web server, you
would enter the range 80 to 80.
4. Check the protocol you will be using, TCP and/or UDP.
5. Enter the IP address of the PC or network device that you want the port server to go to. For example,
if the web server’s Ethernet adapter IP address is 192.168.1.100, you would enter 100 in the field
provided. Check “Appendix E: Finding the MAC Address and IP Address for Your Ethernet Adapter” for
details on getting an IP address.
6. Check the Enable option for the port services you want to use. Consider the example below:
Application
Start and End
Protocol
IP Address
Enabled
Web server
80 to 80
Both
192.168.1.100
X
FTP server
21 to 21
TCP
192.168.1.101
X
SMTP (outgoing)
25 to 25
Both
192.168.1.102
X
POP3 (incoming)
110 to 110
Both
192.168.1.102
X
When you have completed the configuration, click the Save Settings button.
Appendix A: Troubleshooting
Common Problems and Solutions
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Wireless-G Broadband Router with SRX
8. I need to set up online game hosting or use other Internet applications.
If you want to play online games or use Internet applications, most will work without doing any port
forwarding or DMZ hosting. There may be cases when you want to host an online game or Internet
application. This would require you to set up the Router to deliver incoming packets or data to a specific
computer. This also applies to the Internet applications you are using. The best way to get the information on
what port services to use is to go to the website of the online game or application you want to use. Follow
these steps to set up online game hosting or use a certain Internet application:
1. Access the Router’s web interface by going to http://192.168.1.1 or the IP address of the Router. Go to
the Applications & Gaming => Port Forwarding tab.
2. Enter any name you want to use for the Customized Application.
3. Enter the External Port range of the service you are using. For example, if you want to host Unreal
Tournament (UT), you would enter the range 7777 to 27900.
4. Check the protocol you will be using, TCP and/or UDP.
5. Enter the IP address of the PC or network device that you want the port server to go to. For example,
if the web server’s Ethernet adapter IP address is 192.168.1.100, you would enter 100 in the field
provided. Check “Appendix E: Finding the MAC Address and IP Address for Your Ethernet Adapter” for
details on getting an IP address.
6. Check the Enable option for the port services you want to use. Consider the example below:
Application
Start and End
Protocol
IP Address
Enabled
UT
7777 to 27900
Both
192.168.1.100
X
Halflife
27015 to 27015
Both
192.168.1.105
X
PC Anywhere
5631 to 5631
UDP
192.168.1.102
X
VPN IPSEC
500 to 500
UDP
192.168.1.100
X
When you have completed the configuration, click the Save Settings button.
9. I can’t get the Internet game, server, or application to work.
If you are having difficulties getting any Internet game, server, or application to function properly, consider
exposing one PC to the Internet using DeMilitarized Zone (DMZ) hosting. This option is available when an
application requires too many ports or when you are not sure which port services to use. Make sure you
disable all the forwarding entries if you want to successfully use DMZ hosting, since forwarding has priority
over DMZ hosting. (In other words, data that enters the Router will be checked first by the forwarding settings.
If the port number that the data enters from does not have port forwarding, then the Router will send the data
to whichever PC or network device you set for DMZ hosting.)
Appendix A: Troubleshooting
Common Problems and Solutions
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Wireless-G Broadband Router with SRX
Follow these steps to set DMZ hosting:
1. Access the Router’s web-based utility by going to http://192.168.1.1 or the IP address of the Router.
Go to the Applications & Gaming => Port Forwarding tab.
2. Disable or remove the entries you have entered for forwarding. Keep this information in case you
want to use it at a later time.
3. Go to the Applications & Gaming => DMZ tab.
4. Select Enable next to DMZ. In the DMZ Host IP Address field, enter the IP address of the computer you
want exposed to the Internet. This will bypass the NAT technology for that computer. Please refer to
“Appendix E: Finding the MAC Address and IP Address for Your Ethernet Adapter” for details on getting
an IP address.
5. Once completed with the configuration, click the Save Settings button.
10. I forgot my password, or the password prompt always appears when I am saving settings to the
Router.
Reset the Router to factory default by pressing the Reset button for 10 seconds and then releasing it. If you
are still getting prompted for a password when saving settings, then perform the following steps:
1. Access the Router’s web-based utility by going to http://192.168.1.1 or the IP address of the Router.
Enter the default password admin, and click the Administrations => Management tab.
2. Enter a different password in the Router Password field, and enter the same password in the second
field to confirm the password.
3. Click the Save Settings button.
11. I am a PPPoE user, and I need to remove the proxy settings or the dial-up pop-up window.
If you have proxy settings, you need to disable these on your computer. Because the Router is the gateway for
the Internet connection, the computer does not need any proxy settings to gain access. Please follow these
directions to verify that you do not have any proxy settings and that the browser you use is set to connect
directly to the LAN.
• For Microsoft Internet Explorer 5.0 or higher:
1. Click Start, Settings, and Control Panel. Double-click Internet Options.
2. Click the Connections tab.
3. Click the LAN settings button and remove anything that is checked.
4. Click the OK button to go back to the previous screen.
5. Click the option Never dial a connection. This will remove any dial-up pop-ups for PPPoE users.
• For Netscape 4.7 or higher:
1. Start Netscape Navigator, and click Edit, Preferences, Advanced, and Proxies.
2. Make sure you have Direct connection to the Internet selected on this screen.
3. Close all the windows to finish.
Appendix A: Troubleshooting
Common Problems and Solutions
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Wireless-G Broadband Router with SRX
12. To start over, I need to set the Router to factory default.
Hold the Reset button for 10 seconds and then release it. This will return the password, forwarding, and other
settings on the Router to the factory default settings. In other words, the Router will revert to its original
factory configuration.
13. My power LED will not stop flashing.
Press and hold the reset button for five seconds. If this does not work, your firmware may be corrupted. To
upgrade the firmware, follow the steps in “Appendix C: Upgrading Firmware.”
14. I need to upgrade the firmware.
In order to upgrade the firmware with the latest features, you need to go to the Linksys website and download
the latest firmware at www.linksys.com.
Follow these steps:
1. Go to the Linksys website at http://www.linksys.com and download the latest firmware.
2. To upgrade the firmware, follow the steps in “Appendix C: Upgrading Firmware.”
15. The firmware upgrade failed, and/or the Power LED is flashing.
The upgrade could have failed for a number of reasons. Follow these steps to upgrade the firmware and/or
make the Power LED stop flashing:
• If the firmware upgrade failed, use the TFTP program (it was downloaded along with the firmware). Open
the pdf that was downloaded along with the firmware and TFTP program, and follow the pdf’s
instructions.
• Set a static IP address on the PC; refer to “Problem #1, I need to set a static IP address.” Use the following
IP address settings for the computer you are using:
IP Address: 192.168.1.50
Subnet Mask: 255.255.255.0
Gateway: 192.168.1.1
• Perform the upgrade using the TFTP program or the Administration tab of the Router’s web-based utility.
16. My DSL service’s PPPoE is always disconnecting.
PPPoE is not actually a dedicated or always-on connection. The DSL ISP can disconnect the service after a
period of inactivity, just like a normal phone dial-up connection to the Internet.
• There is a setup option to “keep alive” the connection. This may not always work, so you may need to reestablish connection periodically.
1. To connect to the Router, go to the web browser, and enter http://192.168.1.1 or the IP address of the
Router.
2. Enter the password, if asked. (The default password is admin.)
3. On the Setup screen, select the option Keep Alive, and set the Redial Period option at 20 (seconds).
4. Click the Save Settings button.
5. Click the Status tab, and click the Connect button.
Appendix A: Troubleshooting
Common Problems and Solutions
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Wireless-G Broadband Router with SRX
6. You may see the login status display as Connecting. Press the F5 key to refresh the screen, until you
see the login status display as Connected.
• Click the Save Settings button to continue.
• If the connection is lost again, follow steps 1- 6 to re-establish connection.
17. I can’t access my e-mail, web or I am getting corrupted data from the Internet.
The Maximum Transmission Unit (MTU) setting may need to be adjusted. By default, the MTU is set at 1500.
For most DSL users, it is strongly recommended to use MTU 1492.
• If you are having some difficulties, perform the following steps:
1. To connect to the Router, go to the web browser, and enter http://192.168.1.1 or the IP address of the
Router.
2. Enter the password, if asked. (The default password is admin.)
3. Look for the MTU option, and select Manual. In the Size field, enter 1492.
4. Click the Save Settings button to continue.
• If your difficulties continue, change the Size to different values. Try this list of values, one value at a time,
in this order, until your problem is solved:
1462
1400
1362
1300
18. When I enter a URL or IP address, I get a time-out error or am prompted to retry.
• Check if other PCs work. If they do, ensure that your workstation’s IP settings are correct (IP Address,
Subnet Mask, Default Gateway, and DNS). Restart the computer that is having a problem.
• If the PCs are configured correctly, but still not working, check the Router. Ensure that it is connected and
powered on. Connect to it and check its settings. (If you cannot connect to it, check the LAN and power
connections.)
• If the Router is configured correctly, check your Internet connection (DSL/cable modem, etc.) to see if it is
working correctly. You can remove the Router to verify a direct connection.
• Manually configure the TCP/IP settings with a DNS address provided by your ISP.
• Make sure that your browser is set to connect directly and that any dial-up is disabled. For Internet
Explorer, click Tools, Internet Options, and then the Connection tab. Make sure that Internet Explorer is
set to Never dial a connection. For Netscape Navigator, click Edit, Preferences, Advanced, and Proxy.
Make sure that Netscape Navigator is set to Direct connection to the Internet.
19. I cannot connect to the Internet.
• For Cable users - Click on the Status tab and make sure you have the Internet IP address is not 0.0.0.0. If
it is, click the DHCP Renew button, and wait a few minutes for the router to try and contact your service
provider. After the router successfully obtains an IP address, restart your computer.
Appendix A: Troubleshooting
Common Problems and Solutions
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Wireless-G Broadband Router with SRX
• For DSL users - 1) Make sure you have typed in your user name and password correctly. Some service
providers use your full email address as the user name. If you are sure you have enter the right user
name, try using username@[isp.com], where isp.com is the name of your service provider. 2) Power down
your DSL Modem, your PC, and your router. Then power on your DSL Modem, wait for the LEDs on the DSL
modem to stop flashing. Power on your router and wait for the power LED to stop flashing. Finally, power
on your PC.
20. My wireless-G speed seems to be slow.
• Reposition the antenna.
• Reposition the router so that it's higher up, above your other networking gear.
• Change CTS Protection to Disable under advanced wireless settings.
21. I do not see a speed improvement while surfing wirelessly with my SRX equipment.
• Your Internet connection is usually much slower than your wireless network with SRX equipment. This
equipment will not affect the speed of your Internet connection.
• You will see the most improvements in transferring or streaming files from one computer to another in
your network.
• Your network speed will slow down if you have mixed 802.11g and SRX clients. For maximum
performance, use all SRX devices on your network.
22. How do I turn on SRX on my router?
SRX is automatically turned on in Mixed, G-Only and SRX mode. There's nothing you need to do to utilize this
feature.
Appendix A: Troubleshooting
Common Problems and Solutions
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Wireless-G Broadband Router with SRX
Frequently Asked Questions
What is the maximum number of IP addresses that the Router will support?
The Router will support up to 253 IP addresses.
Is IPSec Pass-Through supported by the Router?
Yes, it is a built-in feature that the Router automatically enables.
Where is the Router installed on the network?
In a typical environment, the Router is installed between the cable/DSL modem and the LAN. Plug the Router into
the cable/DSL modem’s Ethernet port.
Does the Router support IPX or AppleTalk?
No. TCP/IP is the only protocol standard for the Internet and has become the global standard for communications.
IPX, a NetWare communications protocol used only to route messages from one node to another, and AppleTalk, a
communications protocol used on Apple and Macintosh networks, can be used for LAN to LAN connections, but
those protocols cannot connect from the Internet to a LAN.
Does the Internet connection of the Router support 100Mbps Ethernet?
The Router’s current hardware design supports up to 100Mbps Ethernet on its Internet port; however, the Internet
connection speed will vary depending on the speed of your broadband connection. The Router also supports
100Mbps over the auto-sensing Fast Ethernet 10/100 switch on the LAN side of the Router.
What is Network Address Translation and what is it used for?
Network Address Translation (NAT) translates multiple IP addresses on the private LAN to one public address that
is sent out to the Internet. This adds a level of security since the address of a PC connected to the private LAN is
never transmitted on the Internet. Furthermore, NAT allows the Router to be used with low cost Internet accounts,
such as DSL or cable modems, when only one TCP/IP address is provided by the ISP. The user may have many
private addresses behind this single address provided by the ISP.
Does the Router support any operating system other than Windows 98SE, Windows Millennium,
Windows 2000, or Windows XP?
Yes, but Linksys does not, at this time, provide technical support for setup, configuration or troubleshooting of
any non-Windows operating systems.
Does the Router support ICQ send file?
Yes, with the following fix: click ICQ menu -> preference -> connections tab->, and check I am behind a firewall
or proxy. Then set the firewall time-out to 80 seconds in the firewall setting. The Internet user can then send a file
to a user behind the Router.
Appendix A: Troubleshooting
Frequently Asked Questions
45
Wireless-G Broadband Router with SRX
I set up an Unreal Tournament Server, but others on the LAN cannot join. What do I need to do?
If you have a dedicated Unreal Tournament server running, you need to create a static IP for each of the LAN
computers and forward ports 7777, 7778, 7779, 7780, 7781, and 27900 to the IP address of the server. You can
also use a port forwarding range of 7777 ~ 27900. If you want to use the UT Server Admin, forward another port.
(Port 8080 usually works well but is used for remote admin. You may have to disable this.) Then in the
[UWeb.WebServer] section of the server.ini file, set the ListenPort to 8080 (to match the mapped port above) and
ServerName to the IP assigned to the Router from your ISP.
Can multiple gamers on the LAN get on one game server and play simultaneously with just one public IP
address?
It depends on which network game or what kind of game server you are using. For example, Unreal Tournament
supports multi-login with one public IP.
How do I get Half-Life: Team Fortress to work with the Router?
The default client port for Half-Life is 27005. The computers on your LAN need to have “+clientport 2700x”
added to the HL shortcut command line; the x would be 6, 7, 8, and on up. This lets multiple computers connect
to the same server. One problem: Version 1.0.1.6 won’t let multiple computers with the same CD key connect at
the same time, even if on the same LAN (not a problem with 1.0.1.3). As far as hosting games, the HL server does
not need to be in the DMZ. Just forward port 27015 to the local IP address of the server computer.
How can I block corrupted FTP downloads?
If you are experiencing corrupted files when you download a file with your FTP client, try using another FTP
program.
The web page hangs; downloads are corrupt, or nothing but junk characters are being displayed on the
screen. What do I need to do?
Force your Ethernet adapter to 10Mbps or half duplex mode, and turn off the “Auto-negotiate” feature of your
Ethernet adapter as a temporary measure. (Please look at the Network Control Panel in your Ethernet adapter’s
Advanced Properties tab.) Make sure that your proxy setting is disabled in the browser. Check our website at
www.linksys.com for more information.
If all else fails in the installation, what can I do?
Reset the Router by holding down the reset button until the Power LED fully turns on and off. Reset your cable or
DSL modem by powering the unit off and then on. Obtain and flash the latest firmware release that is readily
available on the Linksys website, www.linksys.com.
How will I be notified of new Router firmware upgrades?
All Linksys firmware upgrades are posted on the Linksys website at www.linksys.com, where they can be
downloaded for free. To upgrade the Router’s firmware, use the System tab of the Router’s web-based utility. If
the Router’s Internet connection is working well, there is no need to download a newer firmware version, unless
Appendix A: Troubleshooting
Frequently Asked Questions
46
Wireless-G Broadband Router with SRX
that version contains new features that you would like to use. Downloading a more current version of Router
firmware will not enhance the quality or speed of your Internet connection, and may disrupt your current
connection stability.
Will the Router function in a Macintosh environment?
Yes, but the Router’s setup pages are accessible only through Internet Explorer 4.0 or Netscape Navigator 4.0 or
higher for Macintosh.
I am not able to get the web configuration screen for the Router. What can I do?
You may have to remove the proxy settings on your Internet browser, e.g., Netscape Navigator or Internet
Explorer. Or remove the dial-up settings on your browser. Check with your browser documentation, and make
sure that your browser is set to connect directly and that any dial-up is disabled. Make sure that your browser is
set to connect directly and that any dial-up is disabled. For Internet Explorer, click Tools, Internet Options, and
then the Connection tab. Make sure that Internet Explorer is set to Never dial a connection. For Netscape
Navigator, click Edit, Preferences, Advanced, and Proxy. Make sure that Netscape Navigator is set to Direct
connection to the Internet.
What is DMZ Hosting?
Demilitarized Zone (DMZ) allows one IP address (computer) to be exposed to the Internet. Some applications
require multiple TCP/IP ports to be open. It is recommended that you set your computer with a static IP if you
want to use DMZ Hosting. To get the LAN IP address, see “Appendix E: Finding the MAC Address and IP Address
for Your Ethernet Adapter.”
If DMZ Hosting is used, does the exposed user share the public IP with the Router?
No.
Does the Router pass PPTP packets or actively route PPTP sessions?
The Router allows PPTP packets to pass through.
Is the Router cross-platform compatible?
Any platform that supports Ethernet and TCP/IP is compatible with the Router.
How many ports can be simultaneously forwarded?
Theoretically, the Router can establish 520 sessions at the same time, but you can only forward 10 ranges of
ports.
What are the advanced features of the Router?
The Router’s advanced features include Advanced Wireless settings, Filters, Port Forwarding, Routing, and DDNS.
Appendix A: Troubleshooting
Frequently Asked Questions
47
Wireless-G Broadband Router with SRX
How do I get mIRC to work with the Router?
Under the Port Forwarding tab, set port forwarding to 113 for the PC on which you are using mIRC.
Can the Router act as my DHCP server?
Yes. The Router has DHCP server software built-in.
Can I run an application from a remote computer over the wireless network?
This will depend on whether or not the application is designed to be used over a network. Consult the
application’s documentation to determine if it supports operation over a network.
What is the IEEE 802.11g standard?
It is one of the IEEE standards for wireless networks. The 802.11g standard allows wireless networking hardware
from different manufacturers to communicate, provided that the hardware complies with the 802.11g standard.
The 802.11g standard states a maximum data transfer rate of 54Mbps and an operating frequency of 2.4GHz.
What IEEE 802.11b features are supported?
The product supports the following IEEE 802.11b functions:
• CSMA/CA plus Acknowledge protocol
• Multi-Channel Roaming
• Automatic Rate Selection
• RTS/CTS feature
• Fragmentation
• Power Management
What is ad-hoc mode?
When a wireless network is set to ad-hoc mode, the wireless-equipped computers are configured to
communicate directly with each other. The ad-hoc wireless network will not communicate with any wired
network.
What is infrastructure mode?
When a wireless network is set to infrastructure mode, the wireless network is configured to communicate with a
wired network through a wireless access point.
What is roaming?
Roaming is the ability of a portable computer user to communicate continuously while moving freely throughout
an area greater than that covered by a single access point. Before using the roaming function, the workstation
must make sure that it is the same channel number with the access point of dedicated coverage area.
To achieve true seamless connectivity, the wireless LAN must incorporate a number of different functions. Each
node and access point, for example, must always acknowledge receipt of each message. Each node must
Appendix A: Troubleshooting
Frequently Asked Questions
48
Wireless-G Broadband Router with SRX
maintain contact with the wireless network even when not actually transmitting data. Achieving these functions
simultaneously requires a dynamic RF networking technology that links access points and nodes. In such a
system, the user’s end node undertakes a search for the best possible access to the system. First, it evaluates
such factors as signal strength and quality, as well as the message load currently being carried by each access
point and the distance of each access point to the wired backbone. Based on that information, the node next
selects the right access point and registers its address. Communications between end node and host computer
can then be transmitted up and down the backbone.
As the user moves on, the end node’s RF transmitter regularly checks the system to determine whether it is in
touch with the original access point or whether it should seek a new one. When a node no longer receives
acknowledgment from its original access point, it undertakes a new search. Upon finding a new access point, it
then re-registers, and the communication process continues.
What is ISM band?
The FCC and their counterparts outside of the U.S. have set aside bandwidth for unlicensed use in the ISM
(Industrial, Scientific and Medical) band. Spectrum in the vicinity of 2.4 GHz, in particular, is being made available
worldwide. This presents a truly revolutionary opportunity to place convenient high-speed wireless capabilities in
the hands of users around the globe.
What is Spread Spectrum?
Spread Spectrum technology is a wideband radio frequency technique developed by the military for use in
reliable, secure, mission-critical communications systems. It is designed to trade off bandwidth efficiency for
reliability, integrity, and security. In other words, more bandwidth is consumed than in the case of narrowband
transmission, but the trade-off produces a signal that is, in effect, louder and thus easier to detect, provided that
the receiver knows the parameters of the spread-spectrum signal being broadcast. If a receiver is not tuned to
the right frequency, a spread-spectrum signal looks like background noise. There are two main alternatives,
Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping Spread Spectrum (FHSS).
What is DSSS? What is FHSS? And what are their differences?
Frequency-Hopping Spread-Spectrum (FHSS) uses a narrowband carrier that changes frequency in a pattern that
is known to both transmitter and receiver. Properly synchronized, the net effect is to maintain a single logical
channel. To an unintended receiver, FHSS appears to be short-duration impulse noise. Direct-Sequence SpreadSpectrum (DSSS) generates a redundant bit pattern for each bit to be transmitted. This bit pattern is called a chip
(or chipping code). The longer the chip, the greater the probability that the original data can be recovered. Even if
one or more bits in the chip are damaged during transmission, statistical techniques embedded in the radio can
recover the original data without the need for retransmission. To an unintended receiver, DSSS appears as low
power wideband noise and is rejected (ignored) by most narrowband receivers.
Appendix A: Troubleshooting
Frequently Asked Questions
49
Wireless-G Broadband Router with SRX
What is WEP?
WEP is Wired Equivalent Privacy, a data privacy mechanism based on a 64-bit or 128-bit shared key algorithm, as
described in the IEEE 802.11 standard.
What is a MAC Address?
The Media Access Control (MAC) address is a unique number assigned by the manufacturer to any Ethernet
networking device, such as a network adapter, that allows the network to identify it at the hardware level. For all
practical purposes, this number is usually permanent. Unlike IP addresses, which can change every time a
computer logs onto the network, the MAC address of a device stays the same, making it a valuable identifier for
the network.
How do I reset the Router?
Press the Reset button on the back panel for about five seconds. This will reset the Router to its default settings.
How do I resolve issues with signal loss?
There is no way to know the exact range of your wireless network without testing. Every obstacle placed between
the Router and a wireless PC will create signal loss. Lead glass, metal, concrete floors, water and walls will
inhibit the signal and reduce range. Start with the Router and your wireless PC in the same room and move it
away in small increments to determine the maximum range in your environment.
You may also try using different channels, as this may eliminate interference affecting only one channel.
I have excellent signal strength, but I cannot see my network.
WEP is probably enabled on the Router, but not on your wireless adapter (or vice versa). Verify that the same WEP
keys and levels (64 or 128) are being used on all nodes of your wireless network.
How many channels/frequencies are available with the Router?
There are eleven available channels, ranging from 1 to 11 (in North America).
If your questions are not addressed here, refer to the Linksys website, www.linksys.com.
Appendix A: Troubleshooting
Frequently Asked Questions
50
Wireless-G Broadband Router with SRX
Appendix B: Wireless Security
Linksys wants to make wireless networking as safe and easy for you as possible. The current generation of
Linksys products provide several network security features, but they require specific action on your part for
implementation. So, keep the following in mind whenever you are setting up or using your wireless network.
Security Precautions
The following is a complete list of security precautions to take (at least steps 1 through 5 should be followed):
1. Change the default SSID.
2. Disable SSID Broadcast.
3. Change the default password for the Administrator account.
4. Enable MAC Address Filtering.
5. Change the SSID periodically.
6. Use the highest encryption algorithm possible. Use WPA if it is available. Please note that this may reduce
your network performance.
Note: Some of these security features are
available only through the network router or
access point. Refer to the router or access
point’s documentation for more information.
7. Change the WEP encryption keys periodically.
For information on implementing these security features, refer to “Chapter 5: Configuring the Wireless-G
Broadband Router.”
Security Threats Facing Wireless Networks
Wireless networks are easy to find. Hackers know that in order to join a wireless network, wireless networking
products first listen for “beacon messages”. These messages can be easily decrypted and contain much of the
network’s information, such as the network’s SSID (Service Set Identifier). Here are the steps you can take:
Change the administrator’s password regularly. With every wireless networking device you use, keep in mind
that network settings (SSID, WEP keys, etc.) are stored in its firmware. Your network administrator is the only
person who can change network settings. If a hacker gets a hold of the administrator’s password, he, too, can
change those settings. So, make it harder for a hacker to get that information. Change the administrator’s
password regularly.
Appendix B: Wireless Security
Security Precautions
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Wireless-G Broadband Router with SRX
SSID. There are several things to keep in mind about the SSID:
1. Disable Broadcast
2. Make it unique
3. Change it often
Most wireless networking devices will give you the option of broadcasting the SSID. While this option may be
more convenient, it allows anyone to log into your wireless network. This includes hackers. So, don’t broadcast
the SSID.
Wireless networking products come with a default SSID set by the factory. (The Linksys default SSID is “linksys”.)
Hackers know these defaults and can check these against your network. Change your SSID to something unique
and not something related to your company or the networking products you use.
Change your SSID regularly so that any hackers who have gained access to your wireless network will have to
start from the beginning in trying to break in.
MAC Addresses. Enable MAC Address filtering. MAC Address filtering will allow you to provide access to only
those wireless nodes with certain MAC Addresses. This makes it harder for a hacker to access your network with
a random MAC Address.
WEP Encryption. Wired Equivalent Privacy (WEP) is often looked upon as a cure-all for wireless security
concerns. This is overstating WEP’s ability. Again, this can only provide enough security to make a hacker’s job
more difficult.
There are several ways that WEP can be maximized:
1. Use the highest level of encryption possible
2. Use “Shared Key” authentication
3. Change your WEP key regularly
Important: Always remember that each
device in your wireless network MUST use
the same encryption method and encryption
key or your wireless network will not function
properly.
WPA. Wi-Fi Protected Access (WPA) is the newest and best available standard in Wi-Fi security. Two modes are
available: Pre-Shared Key and RADIUS. Pre-Shared Key gives you a choice of two encryption methods: TKIP
(Temporal Key Integrity Protocol), which utilizes a stronger encryption method and incorporates Message
Integrity Code (MIC) to provide protection against hackers, and AES (Advanced Encryption System), which utilizes
a symmetric 128-Bit block data encryption. RADIUS (Remote Authentication Dial-In User Service) utilizes a
RADIUS server for authentication and the use of dynamic TKIP, AES, or WEP.
Appendix B: Wireless Security
Security Threats Facing Wireless Networks
52
Wireless-G Broadband Router with SRX
WPA Pre-Shared Key. If you do not have a RADIUS server, Select the type of algorithm, TKIP or AES, enter a
password in the Pre-Shared key field of 8-64 characters, and enter a Group Key Renewal period time between
0 and 99,999 seconds, which instructs the Router or other device how often it should change the encryption
keys.
WPA RADIUS. WPA used in coordination with a RADIUS server. (This should only be used when a RADIUS
server is connected to the Router or other device.) First, select the type of WPA algorithm, TKIP or AES. Enter
the RADIUS server’s IP Address and port number, along with a key shared between the device and the server.
Last, enter a Group Key Renewal period, which instructs the device how often it should change the encryption
keys.
RADIUS. WEP used in coordination with a RADIUS server. (This should only be used when a RADIUS server is
connected to the Router or other device.) First, enter the RADIUS server’s IP Address and port number, along
with a key shared between the device and the server. Then, select a WEP key and a level of WEP encryption,
and either generate a WEP key through the Passphrase or enter the WEP key manually.
Implementing encryption may have a negative impact on your network’s performance, but if you are transmitting
sensitive data over your network, encryption should be used.
These security recommendations should help keep your mind at ease while you are enjoying the most flexible
and convenient technology Linksys has to offer.
Appendix B: Wireless Security
Security Threats Facing Wireless Networks
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Wireless-G Broadband Router with SRX
Appendix C: Upgrading Firmware
The Broadband Router's firmware is upgraded through the Web-based Utility's Administration tab. Follow these
instructions:
1. Download the firmware from Linksys's website at www.linksys.com.
2. Click Firmware Upgrade from the Web-Utility's Administration tab, and the Upgrade Firmware screen, will
appear.
3. Enter the location of the firmware's file or click the Browse button to find the file.
4. Then, click the Upgrade button to upgrade the firmware.
Figure C-1: Upgrade Firmware
Appendix C: Upgrading Firmware
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Wireless-G Broadband Router with SRX
Appendix D: Windows Help
All Linksys wireless products require Microsoft Windows. Windows is the most used operating system in the
world and comes with many features that help make networking easier. These features can be accessed through
Windows Help and are described in this appendix.
TCP/IP
Before a computer can communicate with the Broadband Router, TCP/IP must be enabled. TCP/IP is a set of
instructions, or protocol, all PCs follow to communicate over a network. This is true for wireless networks as well.
Your PCs will not be able to utilize wireless networking without having TCP/IP enabled. Windows Help provides
complete instructions on enabling TCP/IP.
Shared Resources
If you wish to share printers, folder, or files over your network, Windows Help provides complete instructions on
utilizing shared resources.
Network Neighborhood/My Network Places
Other PCs on your network will appear under Network Neighborhood or My Network Places (depending upon the
version of Windows you're running). Windows Help provides complete instructions on adding PCs to your
network.
Appendix D: Windows Help
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Wireless-G Broadband Router with SRX
AppendixE:FindingtheMACAddressandIPAddressforYour
Ethernet Adapter
This section describes how to find the MAC address for your computer’s Ethernet adapter so you can use the MAC
filtering and/or MAC address cloning feature of the Router. You can also find the IP address of your computer’s
Ethernet adapter. This IP address is used for the Router’s filtering, forwarding, and/or DMZ features. Follow the
steps in this appendix to find the adapter’s MAC or IP address in Windows 98, Me, 2000, or XP.
Windows 98SE or Me Instructions
1. Click Start and Run. In the Open field, enter winipcfg. Then press the Enter key or the OK button.
Figure E-1: IP Configuration Screen
2. When the IP Configuration screen appears, select the Ethernet adapter you have connected to the Router via a
CAT 5 Ethernet network cable.
3. Write down the Adapter Address as shown on your computer screen. This is the MAC address for your
Ethernet adapter and is shown as a series of numbers and letters.
The MAC address/Adapter Address is what you will use for MAC address cloning or MAC filtering.
Another screen will show the Ethernet adapter’s IP address. (Shown in the example as 192.168.1.100.) Your
computer may show something different.
Figure E-2: MAC Address/Adapter Address
Note: The MAC address is also called the Adapter Address.
Figure E-3: MAC Address/Physical Address
Appendix E: Finding the MAC Address and IP Address for Your Ethernet Adapter
Windows 98SE or Me Instructions
56
Wireless-G Broadband Router with SRX
Windows 2000 or XP Instructions
1. Click Start and Run. In the Open field, enter cmd. Press the Enter key or click the OK button.
2. At the command prompt, enter ipconfig /all. Then press the Enter key.
3. Write down the Physical Address as shown on your computer screen; it is the MAC address for your Ethernet
adapter. This appears as a series of numbers and letters.
The MAC address/Physical Address is what you will use for MAC address cloning or MAC filtering.
Note: The MAC address is also called the Physical Address.
Another screen will show the Ethernet adapter’s IP address. (Shown in the example as 192.168.1.100.) Your
computer may show something different.
For the Router’s Web-based Utility
For MAC filtering, enter the 12-digit MAC address in this format, XXXXXXXXXXXX, WITHOUT the hyphens.
Figure E-4: MAC Address Filter List
For MAC address cloning, enter the 12-digit MAC address in the MAC Address fields provided, two digits per field.
Figure E-5: MAC Address Clone
Appendix E: Finding the MAC Address and IP Address for Your Ethernet Adapter
Windows 2000 or XP Instructions
57
Wireless-G Broadband Router with SRX
Appendix F: Glossary
802.11b - An IEEE wireless networking standard that specifies a maximum data transfer rate of 11Mbps and an
operating frequency of 2.4GHz.
802.11g - An IEEE wireless networking standard that specifies a maximum data transfer rate of 54Mbps, an
operating frequency of 2.4GHz, and backward compatibility with 802.11b devices.
Access Point - A device that allows wireless-equipped computers and other devices to communicate with a
wired network. Also used to expand the range of a wireless network.
Adapter - A device that adds network functionality to your PC.
Ad-hoc - A group of wireless devices communicating directly with each other (peer-to-peer) without the use of
an access point.
AES (Advanced Encryption Standard) - A method that uses up to 256-bit key encryption to secure data.
Backbone - The part of a network that connects most of the systems and networks together, and handles the
most data.
Bandwidth - The transmission capacity of a given device or network.
Beacon Interval - Data transmitted on your wireless network that keeps the network synchronized.
Bit - A binary digit.
Boot - To start a device and cause it to start executing instructions.
Broadband - An always-on, fast Internet connection.
Browser - An application program that provides a way to look at and interact with all the information on the
World Wide Web.
Cable Modem - A device that connects a computer to the cable television network, which in turn connects to the
Internet.
CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) - A method of data transfer that is used to prevent
data collisions.
Appendix F: Glossary
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Wireless-G Broadband Router with SRX
CTS (Clear To Send) - A signal sent by a wireless device, signifying that it is ready to receive data.
Database - A collection of data that is organized so that its contents can easily be accessed, managed, and
updated.
DDNS (Dynamic Domain Name System) - Allows the hosting of a website, FTP server, or e-mail server with a
fixed domain name (e.g., www.xyz.com) and a dynamic IP address.
Default Gateway - A device that forwards Internet traffic from your local area network.
DHCP (Dynamic Host Configuration Protocol) - A networking protocol that allows administrators to assign
temporary IP addresses to network computers by "leasing" an IP address to a user for a limited amount of time,
instead of assigning permanent IP addresses.
DMZ (Demilitarized Zone) - Removes the Router's firewall protection from one PC, allowing it to be "seen" from
the Internet.
DNS (Domain Name Server) - The IP address of your ISP's server, which translates the names of websites into IP
addresses.
Domain - A specific name for a network of computers.
Download - To receive a file transmitted over a network.
DSL (Digital Subscriber Line) - An always-on broadband connection over traditional phone lines.
DSSS (Direct-Sequence Spread-Spectrum) - Frequency transmission with a redundant bit pattern resulting in a
lower probability of information being lost in transit.
DTIM (Delivery Traffic Indication Message) - A message included in data packets that can increase wireless
efficiency.
Dynamic IP Address - A temporary IP address assigned by a DHCP server.
Encryption - Encoding data transmitted in a network.
ESS (Extended Service Set) - More than one BSS in a network.
Ethernet - IEEE standard network protocol that specifies how data is placed on and retrieved from a common
transmission medium.
Appendix F: Glossary
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Wireless-G Broadband Router with SRX
Firewall - A set of related programs located at a network gateway server that protects the resources of a
network from users from other networks.
Firmware - The programming code that runs a networking device.
Fragmentation -Breaking a packet into smaller units when transmitting over a network medium that cannot
support the original size of the packet.
FTP (File Transfer Protocol) - A protocol used to transfer files over a TCP/IP network.
Gateway - A device that interconnects networks with different, incompatible communications protocols.
Half Duplex - Data transmission that can occur in two directions over a single line, but only one direction at a
time.
Hardware - The physical aspect of computers, telecommunications, and other information technology devices.
HTTP (HyperText Transport Protocol) - The communications protocol used to connect to servers on the World
Wide Web.
IEEE (The Institute of Electrical and Electronics Engineers) - An independent institute that develops networking
standards.
Infrastructure - A wireless network that is bridged to a wired network via an access point.
IP (Internet Protocol) - A protocol used to send data over a network.
IP Address - The address used to identify a computer or device on a network.
IPCONFIG - A Windows 2000 and XP utility that displays the IP address for a particular networking device.
IPSec (Internet Protocol Security) - A VPN protocol used to implement secure exchange of packets at the IP layer.
ISM band - Radio bandwidth utilized in wireless transmissions.
ISP (Internet Service Provider) - A company that provides access to the Internet.
LAN - The computers and networking products that make up your local network.
MAC (Media Access Control) Address - The unique address that a manufacturer assigns to each networking
device.
Appendix F: Glossary
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Wireless-G Broadband Router with SRX
Mbps (MegaBits Per Second) - One million bits per second; a unit of measurement for data transmission.
mIRC - An Internet Relay Chat program that runs under Windows.
NAT (Network Address Translation) - NAT technology translates IP addresses of a local area network to a different
IP address for the Internet.
Network - A series of computers or devices connected for the purpose of data sharing, storage, and/or
transmission between users.
Node - A network junction or connection point, typically a computer or work station.
Packet - A unit of data sent over a network.
Passphrase - Used much like a password, a passphrase simplifies the WEP encryption process by automatically
generating the WEP encryption keys for Linksys products.
Ping (Packet INternet Groper) - An Internet utility used to determine whether a particular IP address is online.
POP3 (Post Office Protocol 3) - A standard mail server commonly used on the Internet.
Port - The connection point on a computer or networking device used for plugging in cables or adapters.
PPPoE (Point to Point Protocol over Ethernet) - A type of broadband connection that provides authentication
(username and password) in addition to data transport.
PPTP (Point-to-Point Tunneling Protocol) - A VPN protocol that allows the Point to Point Protocol (PPP) to be
tunneled through an IP network. This protocol is also used as a type of broadband connection in Europe.
RADIUS (Remote Authentication Dial-In User Service) - A protocol that uses an authentication server to control
network access.
Roaming - The ability to take a wireless device from one access point's range to another without losing the
connection.
Router - A networking device that connects multiple networks together.
RTS (Request To Send) - A networking method of coordinating large packets through the RTS Threshold setting.
Server - Any computer whose function in a network is to provide user access to files, printing, communications,
and other services.
Appendix F: Glossary
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Wireless-G Broadband Router with SRX
SMTP (Simple Mail Transfer Protocol) - The standard e-mail protocol on the Internet.
Software - Instructions for the computer. A series of instructions that performs a particular task is called a
"program".
SPI (Stateful Packet Inspection) Firewall - A technology that inspects every incoming packet of information
before allowing it to enter the network.
Spread Spectrum - Wideband radio frequency technique used for more reliable and secure data transmission.
SSID (Service Set IDentifier) - Your wireless network's name.
Static IP Address - A fixed address assigned to a computer or device that is connected to a network.
Static Routing - Forwarding data in a network via a fixed path.
Subnet Mask - An address code that determines the size of the network.
Switch - 1. A data switch that connects computing devices to host computers, allowing a large number of
devices to share a limited number of ports. 2. A device for making, breaking, or changing the connections in an
electrical circuit.
TCP (Transmission Control Protocol) - A network protocol for transmitting data that requires acknowledgement
from the recipient of data sent.
TCP/IP (Transmission Control Protocol/Internet Protocol) - A set of instructions PCs use to communicate over a
network.
Telnet - A user command and TCP/IP protocol used for accessing remote PCs.
TFTP (Trivial File Transfer Protocol) - A version of the TCP/IP FTP protocol that has no directory or password
capability.
TKIP (Temporal Key Integrity Protocol) - a wireless encryption protocol that provides dynamic encryption keys for
each packet transmitted.
Topology - The physical layout of a network.
UDP (User Datagram Protocol) - A network protocol for transmitting data that does not require acknowledgement
from the recipient of the data that is sent.
Upgrade - To replace existing software or firmware with a newer version.
Appendix F: Glossary
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Wireless-G Broadband Router with SRX
URL (Uniform Resource Locator) - The address of a file located on the Internet.
VPN (Virtual Private Network) - A security measure to protect data as it leaves one network and goes to another
over the Internet.
WAN (Wide Area Network)- The Internet.
WEP (Wired Equivalent Privacy) - A method of encrypting network data transmitted on a wireless network for
greater security.
WINIPCFG - A Windows 98 and Me utility that displays the IP address for a particular networking device.
WLAN (Wireless Local Area Network) - A group of computers and associated devices that communicate with
each other wirelessly.
WPA (Wi-Fi Protected Access) - a wireless security protocol using TKIP (Temporal Key Integrity Protocol)
encryption, which can be used in conjunction with a RADIUS server.
Appendix F: Glossary
63
Wireless-G Broadband Router with SRX
Appendix G: Specifications
Model
WRT54GX
Standards
IEEE 802.3, IEEE 802.3u, IEEE 802.11g, IEEE 802.11b
Channels
11 Channels (US, Canada)
13 Channels (Europe)
Ports/Buttons
Internet: One 10/100 RJ-45 Port
LAN: Four 10/100 RJ-45 Switched Ports
One Power Port
One Reset Button
Cabling Type
UTP CAT 5
LEDs
Power, DMZ, Wireless, LAN (1, 2, 3, 4), Internet
RF Power Output
17 dBm
UPnP able/cert
Able
Security features
Stateful Packet Inspection (SPI) Firewall, Internet Policy
Wireless Security
WEP, Wireless MAC Filtering
Dimensions
(W x H x D)
6.38" x 6.38" x 1.58"
(162 mm x 162 mm x 40 mm)
Unit Weight
16 oz. (0.6 kg)
Appendix G: Specifications
64
Wireless-G Broadband Router with SRX
Power
External, 12V DC, 1.0A
Certification
FCC, IC-03, CE
Operating Temp.
0° C to 40° C (32° F to 104° F)
Storage Temp.
-10° C to 65° C (-14° F to 149° F)
Operating Humidity
5% to 80% Non-Condensing
Storage Humidity
5% to 80% Non-Condensing
Warranty
3-Years Limited
Appendix G: Specifications
65
Wireless-G Broadband Router with SRX
Appendix H: Warranty Information
LIMITED WARRANTY
Linksys warrants to You that, for a period of three years (the “Warranty Period”), your Linksys Product will be substantially
free of defects in materials and workmanship under normal use. Your exclusive remedy and Linksys' entire liability under
this warranty will be for Linksys at its option to repair or replace the Product or refund Your purchase price less any
rebates. This limited warranty extends only to the original purchaser.
If the Product proves defective during the Warranty Period call Linksys Technical Support in order to obtain a Return
Authorization Number, if applicable. BE SURE TO HAVE YOUR PROOF OF PURCHASE ON HAND WHEN CALLING. If You are
requested to return the Product, mark the Return Authorization Number clearly on the outside of the package and include a
copy of your original proof of purchase. RETURN REQUESTS CANNOT BE PROCESSED WITHOUT PROOF OF PURCHASE. You
are responsible for shipping defective Products to Linksys. Linksys pays for UPS Ground shipping from Linksys back to You
only. Customers located outside of the United States of America and Canada are responsible for all shipping and handling
charges.
ALL IMPLIED WARRANTIES AND CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED
TO THE DURATION OF THE WARRANTY PERIOD. ALL OTHER EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF NON-INFRINGEMENT, ARE DISCLAIMED. Some jurisdictions do not
allow limitations on how long an implied warranty lasts, so the above limitation may not apply to You. This warranty gives
You specific legal rights, and You may also have other rights which vary by jurisdiction.
This warranty does not apply if the Product (a) has been altered, except by Linksys, (b) has not been installed, operated,
repaired, or maintained in accordance with instructions supplied by Linksys, or (c) has been subjected to abnormal
physical or electrical stress, misuse, negligence, or accident. In addition, due to the continual development of new
techniques for intruding upon and attacking networks, Linksys does not warrant that the Product will be free of
vulnerability to intrusion or attack.
TO THE EXTENT NOT PROHIBITED BY LAW, IN NO EVENT WILL LINKSYS BE LIABLE FOR ANY LOST DATA, REVENUE OR
PROFIT, OR FOR SPECIAL, INDIRECT, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, REGARDLESS OF THE THEORY
OF LIABILITY (INCLUDING NEGLIGENCE), ARISING OUT OF OR RELATED TO THE USE OF OR INABILITY TO USE THE PRODUCT
(INCLUDING ANY SOFTWARE), EVEN IF LINKSYS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN NO EVENT
WILL LINKSYS’ LIABILITY EXCEED THE AMOUNT PAID BY YOU FOR THE PRODUCT. The foregoing limitations will apply even
if any warranty or remedy provided under this Agreement fails of its essential purpose. Some jurisdictions do not allow the
exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to You.
Please direct all inquiries to: Linksys, P.O. Box 18558, Irvine, CA 92623 USA.
66
Appendix H: Warranty Information
Wireless-G Broadband Router with SRX
Appendix I: Regulatory Information
FCC STATEMENT
This product has been tested and complies with the specifications for a Class B digital device, pursuant to Part 15
of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used according to the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which is found by turning the equipment off and on,
the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna
Increase the separation between the equipment or devices
Connect the equipment to an outlet other than the receiver's
Consult a dealer or an experienced radio/TV technician for assistance
FCC Radiation Exposure Statement
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This
equipment should be installed and operated with minimum distance 20cm between the radiator and your body.
INDUSTRY CANADA (CANADA)
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.
The use of this device in a system operating either partially or completely outdoors may require the user to obtain
a license for the system according to the Canadian regulations.
EC DECLARATION OF CONFORMITY (EUROPE)
Linksys declares that the Wireless-G Broadband Router conforms to the specifications listed below, following the
provisions of the European R&TTE directive 1999/5/EC:
EN 301 489-1, 301 489-17 General EMC requirements for Radio equipment.
EN 609 50 Safety
Appendix I: Regulatory Information
67
Wireless-G Broadband Router with SRX
EN 300-328-1, EN 300-328-2 Technical requirements for Radio equipment.
Caution: This equipment is intended to be used in all EU and EFTA countries. Outdoor use may be restricted to
certain frequencies and/or may require a license for operation. Contact local Authority for procedure to follow.
Note: Combinations of power levels and antennas resulting in a radiated power level of above 100 mW equivalent
isotropic radiated power (EIRP) are considered as not compliant with the above mentioned directive and are not
allowed for use within the European community and countries that have adopted the European R&TTE directive
1999/5/EC.
For more details on legal combinations of power levels and antennas, contact Linksys Corporate Compliance.
Linksys vakuuttaa täten että Wireless-G Broadband Router tyyppinen laite on direktiivin 1999/5/EY oleellisten
vaatimusten ja sitä koskevien näiden direktiivien muiden ehtojen mukainen.
Linksys déclare la Wireless-G Broadband Router est conforme aux conditions essentielles et aux dispositions
relatives à la directive 1999/5/EC.
Belgique:
Dans le cas d'une utilisation privée, à l'extérieur d'un bâtiment, au-dessus d'un espace public, aucun
enregistrement n'est nécessaire pour une distance de moins de 300m. Pour une distance supérieure à 300m un
enregistrement auprès de l'IBPT est requise. Pour une utilisation publique à l'extérieur de bâtiments, une licence
de l'IBPT est requise. Pour les enregistrements et licences, veuillez contacter l'IBPT.
France:
2.4 GHz Bande : les canaux 10, 11, 12, 13 (2457, 2462, 2467, et 2472 MHz respectivement) sont complétement
libres d'utilisation en France (en utilisation intérieur). Pour ce qui est des autres canaux, ils peuvent être soumis à
autorisation selon le départment. L'utilisation en extérieur est soumis à autorisation préalable et très restreint.
Vous pouvez contacter l'Autorité de Régulation des Télécommunications (http://www.art-telecom.fr) pour de plus
amples renseignements.
Appendix I: Regulatory Information
68
Wireless-G Broadband Router with SRX
Appendix J: Contact Information
Need to contact Linksys?
Visit us online for information on the latest products and updates
to your existing products at:
http://www.linksys.com or
ftp.linksys.com
Can't find information about a product you want to buy
on the web? Do you want to know more about networking
with Linksys products? Give our advice line a call at:
Or fax your request in to:
800-546-5797 (LINKSYS)
949-823-3002
If you experience problems with any Linksys product,
you can call us at:
Don't wish to call? You can e-mail us at:
800-326-7114
support@linksys.com
If any Linksys product proves defective during its warranty period,
you can call the Linksys Return Merchandise Authorization
department for obtaining a Return Authorization Number at:
(Details on Warranty and RMA issues can be found in the Warranty
Information section in this Guide.)
949-823-3000
69
Appendix J: Contact Information
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