Wireless-G ADSL Home Gateway

Figure 5-21: Security

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Figure 5-22: Firewall Log

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Figure 5-23: Internet Access

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Figure 5-24: Internet Policy Summary

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Figure 5-25: List of PCs

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Figure 5-26: Add/Edit Service

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Figure 5-27: Single Port Forwarding

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Figure 5-28: Port Range Forwarding

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Figure 5-29: Port Triggering

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Figure 5-30: DMZ

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Figure 5-31: QoS

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Figure 5-32: Management

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Figure 5-33: Allowed IP - IP Range

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Figure 5-34: Reporting

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Figure 5-35: System Log

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Figure 5-36: Ping Test

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Figure 5-37: Backup&Restore

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Figure 5-38: Factory Defaults

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Figure 5-39: Firmware Upgrade

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Figure 5-40: Reboot

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Figure 5-41: Gateway

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Figure 5-42: Local Network

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Figure 5-43: DHCP Active IP Table

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Figure 5-44: ARP/RARP Table

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Figure 5-45: Wireless

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Figure 5-46: Networked Computers

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Figure 5-47: DSL Connection

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Figure C-1: IP Configuration Screen

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Figure C-2: MAC Address/Adapter Address

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Figure C-3: MAC Address/Physical Address

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Figure D-1: Firmware Upgrade

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1

Chapter 1: Introduction

Welcome

Wireless-G ADSL Home Gateway

Chapter 1: Introduction

Welcome

Thank you for choosing the Wireless-G ADSL Home Gateway. This Gateway will provide your computers with a

high-speed Internet connection as well as resources, including files and printers. Since the Gateway is wireless,

Internet access can be shared over the wired network as well as the wireless broadcast at up to 11Mbps for

Wireless-B or up to 54Mbps for Wireless-G.

How does the Gateway do all of this? By connecting the Internet, as well as your computers and peripherals, to

the Gateway, then the Gateway can direct and control communications for your network.

To protect your data and privacy, the Gateway features an advanced firewall to keep out Internet intruders.

Wireless transmissions can be protected by powerful data encryption. In addition, you can safeguard your family

with parental control features such as Internet access restrictions and keyword blocking. You can configure the

Gateway’s settings through the easy-to-use, browser-based utility.

But what does all of this mean?

Networks are useful tools for sharing Internet access and 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 not only are useful in homes and offices, but also can be fun.

PCs on a wired network create a LAN, or Local Area Network. They are connected with Ethernet cables, which is

why the network is called “wired”. 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. This is sometimes called a WLAN, or Wireless Local Area Network. Since the Gateway has

wireless capabilities, it can bridge your wired and wireless networks, letting them communicate with each other.

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 ADSL Home Gateway protects your networks from

unauthorized and unwelcome users.

Linksys recommends using the Setup CD-ROM for first-time installation of the Gateway. 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 Gateway,

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 ADSL Home Gateway.

lan

(local area network): The computers and

networking products that make up the network in

your home or office.

nat

(network address translation): NAT technology

translates IP addresses of a local area network to a

different IP address for the Internet.

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.

spi

(stateful packet inspection)

firewall

: a technology

that inspects incoming packets of information before

allowing them to enter the network.

firewall

: Security measures that protect the

resources of a local network from intruders.

network

: a series of computers or devices

connected for the purpose of data sharing,

storage, and/or transmission between users

2

Chapter 1: Introduction

What’s in this User Guide?

Wireless-G ADSL Home Gateway

What’s in this User Guide?

This user guide covers the steps for setting up and using the Wireless-G ADSL Home Gateway.

•

Chapter 1: Introduction

This chapter describes applications of the Wireless-G ADSL Home Gateway and this User Guide.

•

Chapter 2: Planning Your Network

This chapter describes the basics of networking.

•

Chapter 3: Getting to Know the Wireless-G ADSL Home Gateway

This chapter describes the physical features of the Gateway.

•

Chapter 4: Connecting the Wireless-G ADSL Home Gateway

This chapter instructs you on how to connect the Gateway to your network.

•

Chapter 5: Configuring the Wireless-G ADSL Home Gateway

This chapter explains how to use the Web-based Utility to configure the settings on the Gateway.

•

Appendix A: Troubleshooting

This appendix describes some problems and solutions, as well as frequently asked questions, regarding

installation and use of the Wireless-G ADSL Home Gateway.

•

Appendix B: Wireless Security

This appendix explains the risks of wireless networking and some solutions to reduce the risks.

•

Appendix C: 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 MAC filtering and/or MAC address cloning feature of the Gateway.

•

Appendix D: Upgrading Firmware

This appendix instructs you on how to upgrade the firmware on the Gateway if you should need to do so.

•

Appendix E: Glossary

This appendix gives a brief glossary of terms frequently used in networking.

•

Appendix F: Specifications

This appendix provides the technical specifications for the Gateway.

•

Appendix G: Warranty Information

This appendix supplies the warranty information for the Gateway.

3

Chapter 1: Introduction

What’s in this User Guide?

Wireless-G ADSL Home Gateway

•

Appendix H: Regulatory Information

This appendix supplies the regulatory information regarding the Gateway.

•

Appendix I: Contact Information

This appendix provides contact information for a variety of Linksys resources, including Technical Support.

4

Chapter 2: Planning Your Network

The Gateway’s Functions

Wireless-G ADSL Home Gateway

Chapter 2: Planning Your Network

The Gateway’s Functions

A Gateway is a network device that connects two networks together.

In this instance, the Gateway connects your Local Area Network (LAN), or the group of computers in your home or

office, to the Internet. The Gateway processes and regulates the data that travels between these two networks.

The Gateway’s NAT feature protects your network of computers so users on the public, Internet side cannot “see”

your computers.

This is how your network remains private. The Gateway protects your network by inspecting

every packet coming in through the Internet port before delivery to the appropriate computer on your network.

The Gateway inspects Internet port services like the web server, ftp server, or other Internet applications, and, if

allowed, it will forward the packet to the appropriate computer on the LAN side.

Remember that the Gateway’s ports connect to two sides. The LAN ports connect to the LAN, and the ADSL port

connects to the Internet.

The LAN ports transmit data at 10/100Mbps.

IP Addresses

What’s an IP Address?

IP stands for Internet Protocol. Every device on an IP-based network, including computers, print servers, and

Gateways, requires an IP address to identify its “location,” or address, on the network.

This applies to both the

Internet and LAN connections. There are two ways of assigning an IP address to your network devices. You can

assign static IP addresses or use the Gateway to assign IP addresses dynamically.

Static IP Addresses

A static IP address is a fixed IP address that you assign manually to a computer or other device on the network.

Since a static IP address remains valid until you disable it, static IP addressing ensures that the device assigned

it will always have that same IP address until you change it.

Static IP addresses must be unique and are

commonly used with network devices such as server computers or print servers.

NOTE:

Since the Gateway is a device that connects

two networks, it needs two IP addresses—one for

the LAN, and one for the Internet.

In this User Guide,

you’ll see references to the “Internet IP address”

and the “LAN IP address.”

Since the Gateway uses NAT technology, the only IP

address that can be seen from the Internet for your

network is the Gateway’s Internet IP address.

However, even this Internet IP address can be

blocked, so that the Gateway and network seem

invisible to the Internet—see the Block WAN

Requests description under Security in “Chapter 5:

Configuring the Wireless-G ADSL Home Gateway.”

Figure 2-1: Network

ip

(internet protocol): a protocol used to send data

over a network