D-Link Express Ethernetwork DI-604 Owner's Manual page 19

ADVANCED > APPLICATIONS
Some applications require multiple connections, like Internet games, Video
conferencing, Internet telephony and so on. Due to the firewall function,
these applications cannot work without some intervention. Special
Applications makes some of these applications work with the DI-604. If
Special Applications is still insufficient to allow an application to function
correctly, try the DMZ Host in the Miscellaneous Items options.
Trigger: the outbound port number the application issued first.
Incoming Ports: when the trigger packet is detected, the inbound packets to
the specified port numbers are allowed to pass the firewall.
The DI-604 provides some predefined settings in the gray pad on the bottom
of the web page. Select your application in the Popular applications pull-
down menu and click Copy to in order to copy the predefined setting.
Note! At any time, only one PC can use each Special Application tunnel.
Click Apply if you have made any changes.