User`s manual

NAT Setup contains three functional items including Port Trigger,

Virtual Server and Virtual DMZ.

4.3.1 Port Trigger

Application-triggered port forwarding opens a port only when a

program needs to use it. You can set a trigger port to open an

incoming port. When trigger ports are used, the system opens the

specified incoming ports.

To setup port trigger, follow the instructions below.

Enable Port Trigger:

Select Yes to enable or No to disable port trigger.

Popular Applications:

The drop-down list has listed some popular applications, you can

get the port number of an application by selecting from the

drop-down list. Or you can also select User Defined from the list