Netgear Modem DGN2200V3 User Manual download pdf (Page 46)

Security Settings

N300 Wireless ADSL2+ Modem Router DGN2200v3

4. Your router performs Network Address Translation (NAT) on the source IP address, and

sends this request message through the Internet to the remote computer, which displays the

web page from www.example.com.

To configure port forwarding, you need to know which inbound ports the application needs.

You usually can determine this information by contacting the publisher of the application or

the relevant user groups or news groups.

How Port Forwarding Differs from Port Triggering

The following points summarize the differences between port forwarding and port triggering:

• Port triggering can be used by any computer on your network, although only one

computer can use it at a time.

• Port forwarding is configured for a single computer on your network.

• With port triggering, the router does not need to know the computer’s IP address in

advance. The IP address is captured automatically.

• Port forwarding requires that you specify the computer’s IP address during configuration,

and the IP address can never change.

• Port triggering requires specific outbound traffic to open the inbound ports, and the

triggered ports are closed after a period of no activity.

• Port forwarding is always active and does not need to be triggered.

Set Up Port Forwarding to Local Servers

Using the port forwarding feature, you can allow certain types of incoming traffic to reach

servers on your local network. For example, you might want to make a local web server, FTP

server, or game server visible and available to the Internet.

Use the Port Forwarding/Port Triggering screen to configure the router to forward specific

incoming protocols to computers on your local network. In addition to servers for specific

applications, you can also specify a default DMZ server to which all other incoming protocols

are forwarded.

Before starting, you need to determine which type of service, application, or game you want

to provide, and the local IP address of the computer that will provide the service. The server

computer has to always have the same IP address.

Tip: To ensure that your server computer always has the same IP address,

use the reserved IP address feature of your product.

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Netgear Modem DGN2200V3 User Manual Page 46