Feb 27

Some applications require multiple connections, such as Internet gaming, video conferencing, Internet telephony, VPNs, and others. These applications have difficulties working through NAT (Network Address Translation). If you need to run applications that require multiple connections, specify the port normally associated with an application in the Trigger Port field, select the protocol type as TCP (Transmission Control Protocol, UDP (User Datagram Protocol), or both, then enter the public ports associated with the trigger port to open them for inbound traffic.

This article tell you how to use the special applications feature on D-Link routers,DI-624 as an example.

The Trigger port is an outgoing port (from LAN to WAN) that the application will send out.

Step 1: Open your web browser and enter the IP address of your router (

Step 2: Enter your username (admin) and password, if any.

Step 3: Click on Advanced tab on the top and then Applications on the left side.


Name – This is the name referencing the special application.

Trigger Port – This is the port used to trigger the application. It can be either a single port or a range of ports.

Trigger Type – This is the protocol used to trigger the special application.

Public Port – 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.

Public Type – This is the protocol used for the special application.

At the bottom of the screen, there are already defined well-known special applications. To use them, click on the edit icon and enable the service.


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