SMC Networks SMC7004BR - Manual (Page 23)

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4.7 Special AP
Some applications require multiple connections, such as Internet games, video
conferencing, Internet telephony and others. Due to the firewall function, these applications
can not work with a pure NAT router. Special Applications allows some of these
applications to work with a NAT router. If the Special Applications are still insufficient to
allow an application to function correctly, try DMZ host in the Miscellaneous Items options.
1. Trigger: the outbound port number that the application assigned first.
2. Incoming Ports: when the trigger packet is detected, the inbound packets to the
specified port number are allowed to pass through the firewall.
This product provides some predefined settings in the gray pad on the bottom of the web
page. Choose the Popular application and click Copy to copy the predefined setting.
Note: Only one PC can use each Special Applications tunnel at one time.