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From the Service list, select the service for 
which you want to configure port forwarding. 

To add a custom rule that is not in the list of 
services, specify these settings in the Add 
Custom Service table:

Name. A name for the service.

Start Port. The start port for the service.

End Port. The end port for the service.

Protocol. The protocol for the ports:

TCP. TCP only.

UDP. UDP only.

Both. Both TCP and UDP.

Local IP Address. Complete the local IP 
address for the computer that is using the 
service.

Perform one of these actions:

Click Add. The Active Forwarding Rules table displays the list of forwarded ports.

To delete a service, select the radio button in the Active Forwarding Rules table for 
the service that you want to delete, and click Delete.

To reset the selection in the Service list and to clear all the fields in the Add Custom 
Rules, click Reset.

Port triggering is an advanced feature that you can use to allow gaming and other Internet 
applications that the firewall would otherwise block. You must know the port numbers the 
application uses. Port triggering operates as follows:

A computer makes an outgoing connection using a port number defined in the Port 

Triggering table.

The gateway records this connection, opens the incoming port or ports associated with this 
entry in the Port Triggering List, and associates them with the computer.

The remote system receives the computer’s request, and responds using a different port 
number.

The gateway matches the response to the previous request, and forwards the response to 
the computer. (Without port triggering, this response would be treated as a new connection 
request rather than a response. As such, it would be handled in accordance with the port 
forwarding rules.)