Wireless-N ADSL2+ Gateway

Figure 5-25: Internet Access Policy

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Figure 5-26: Internet Policy Summary

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Figure 5-27: List of PCs

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Figure 5-28: Single Port Forwarding

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Figure 5-29: Port Range Forwarding

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Figure 5-30: Port Triggering

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Figure 5-31: DMZ

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Figure 5-32: QoS

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Figure 5-33: QoS - Online Game

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Figure 5-34: QoS - MSN Messenger

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Figure 5-35: QoS - YAHOO Messenger

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Figure 5-36: QoS - Skype

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Figure 5-37: QoS - Voice Device

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Figure 5-38: QoS - Add a New Application (Port Range)

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Figure 5-39: QoS - Add a New Application (MAC Address)

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Figure 5-40: Management

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Figure 5-41: Reporting

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Figure 5-42: View Log

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Figure 5-43: Diagnostics

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Figure 5-44: Ping Test

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Figure 5-45: Backup & Restore

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Figure 5-46: Factory Defaults

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Figure 5-47: Firmware Upgrade

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Figure 5-48: Gateway

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Figure 5-49: Local Network

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Figure 5-50: DHCP Active IP Table

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Figure 5-51: ARP/RARP Table

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Figure 5-52: Wireless

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Figure 5-53: 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-N ADSL2+ Gateway

Chapter 1: Introduction

Welcome

Thank you for choosing the Wireless-N ADSL2+ Gateway. The Gateway will allow you to network wirelessly better

than ever, sharing Internet access, files and fun, easily and securely and with a greater range of up to three times

farther than standard Wireless-G.

The incredible speed of Wireless-N makes it ideal for media-centric applications like streaming video and Voice

over IP (VoIP) telephony, so your network can handle multiple data streams at the same time, with no degradation

in performance.

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. Plus, since the Gateway

is wireless, Internet access can be shared over the wireless broadcast as well as the wired network.

Use wireless security to secure your wireless network while the whole network is protected through a Stateful

Packet Inspection (SPI) firewall and Network Address Translation (NAT) technology. The Gateway also offers VPN

passthrough and other features, which can be configured 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.

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-N ADSL2+ 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.

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

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.

2

Chapter 1: Introduction

What’s in this User Guide?

Wireless-N ADSL2+ Gateway

What’s in this User Guide?

This user guide covers the steps for setting up and using the Wireless-N ADSL2+ Gateway.

•

Chapter 1: Introduction

This chapter describes applications of the Wireless-N ADSL2+ Gateway and this User Guide.

•

Chapter 2: Planning Your Network

This chapter describes the basics of networking.

•

Chapter 3: Getting to Know the Wireless-N ADSL2+ Gateway

This chapter describes the physical features of the Gateway.

•

Chapter 4: Connecting the Wireless-N ADSL2+ Gateway

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

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Chapter 5: Configuring the Wireless-N ADSL2+ Gateway

This chapter explains how to configure the Gateway’s settings using its 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-N ADSL2+ Gateway.

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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.

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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-N ADSL2+ 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-N ADSL2+ 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 Security - Firewall

tab in “Chapter 5: Configuring the Wireless-N

ADSL2+ Gateway.”

Figure 2-1: Network

ip

(internet protocol): a protocol used to send data

over a network