D-Link DI-707P - Manual (Page 21)

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Using the Configuration Menu
Advanced > Application
Some applications require multiple connections, such as Internet gaming, video
conferencing, Internet telephony and others. These applications have difficulties working
through NAT (Network Address Translation). Special Applications makes some of these
applications work with the DI-707P. If you need to run applications that require multiple
connections, specify the port normally associated with an application in the Trigger
field, then enter the public ports associated with the trigger port into the Incoming
Ports field.
At the bottom of the screen, there are already defined special applications. To use
them, select one from the drop down list and select an ID number you want to use.
Then click the “Copy to” button and the router will fill in the appropriate information to
the list. You will then need to enable the service. If the mechanism of Special Applica-
tions fails to make an application work, try using DMZ host instead.
Note! Only one PC can use each Special Application tunnel.
Trigger- This is the port used to trigger the application. It can be either
a single port or a range of ports.
Incoming Ports-
This is the port number on the WAN side that will be used to
access the application. You may define a single port or a range
of ports. You can use a comma to add multiple ports or port
ranges.
Enable- Select to activate the policy