SMC Networks 7004VBR User Manual page 41

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DVANCED ETUP
Enabling Special Applications
Some applications, such as Internet gaming, videoconferencing, Internet
telephony and others, require multiple connections. These applications
cannot work with Network Address Translation (NAT) enabled. If you
need to run applications that require multiple connections, use the
following screen to specify the additional public ports to be opened for
each application.
Specify the port normally associated with an application in the "Trigger
Port" field, select the protocol type as TCP or UDP, then enter the public
ports associated with the trigger port to open them for inbound traffic.
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