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N600 Wireless Dual Band Gigabit VDSL2 Modem Router DGND3800B
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 modem 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
The port forwarding feature lets you 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 modem 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 you start, 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.
To ensure that your server computer always has the same IP address, use the reserved IP
address feature of your product. See
Address Reservation
on page 52.
Security
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