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Wireless-N ADSL2+ Gateway
Figure 5-25: Internet Access Policy
31
Figure 5-26: Internet Policy Summary
31
Figure 5-27: List of PCs
32
Figure 5-28: Single Port Forwarding
33
Figure 5-29: Port Range Forwarding
34
Figure 5-30: Port Triggering
35
Figure 5-31: DMZ
36
Figure 5-32: QoS
37
Figure 5-33: QoS - Online Game
38
Figure 5-34: QoS - MSN Messenger
38
Figure 5-35: QoS - YAHOO Messenger
38
Figure 5-36: QoS - Skype
38
Figure 5-37: QoS - Voice Device
38
Figure 5-38: QoS - Add a New Application (Port Range)
38
Figure 5-39: QoS - Add a New Application (MAC Address)
39
Figure 5-40: Management
40
Figure 5-41: Reporting
42
Figure 5-42: View Log
42
Figure 5-43: Diagnostics
43
Figure 5-44: Ping Test
43
Figure 5-45: Backup & Restore
44
Figure 5-46: Factory Defaults
45
Figure 5-47: Firmware Upgrade
45
Figure 5-48: Gateway
46
Figure 5-49: Local Network
47
Figure 5-50: DHCP Active IP Table
47
Figure 5-51: ARP/RARP Table
47
Figure 5-52: Wireless
48
Figure 5-53: DSL Connection
49
Figure C-1: IP Configuration Screen
68
Figure C-2: MAC Address/Adapter Address
68
Figure C-3: MAC Address/Physical Address
69
Figure D-1: Firmware Upgrade
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Page 7 / 98
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.
Page 8 / 98
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.
•
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.
•
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.
Page 9 / 98
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.
Page 10 / 98
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

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