Draytek VIGOR2925 SERIES User Manual page 283

Triggering Port
Incoming Protocol
Incoming Port
After finishing all the settings here, please click OK to save the configuration.
Type the port or port range for such triggering profile.
When the triggering packets received, it is expected the
incoming packets will use the selected protocol. Select the
protocol (TCP, UDP or TCP/UDP) for the incoming data of
such triggering profile.
Type the port or port range for the incoming packets.
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Vigor2925 Series User's Guide