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User Manual
Port Triggering
Some applications require multiple connections, like Internet games, video conferencing,
Internet calling and so on. These applications cannot work with a pure NAT router. Port
Triggering is used for some of these applications that can work with an NAT router. You
can set up Port Triggering on this page:
Port Triggering
Port triggering process:
1. A local host makes an outgoing connection using a destination port number
defined in the Trigger Port field.
2. The router records this connection, opens the incoming port or ports associated
with this entry in the Port Triggering table, and associates them with the local
host.
3. When necessary the external host will be able to connect to the local host using
one of the ports defined in the Incoming Ports field.
Trigger Port The port for outgoing traffic. An outgoing connection using this port
Trigger
will
this rule.
Trigger Protocol The protocol used for Trigger Ports, either TCP, UDP, or All (all
protocols supported by the router).
Incoming Ports Range The port or port range used by the remote system when it
responds to the outgoing request. A response using one of these ports will be
forwarded to the PC that triggered this rule. You can input at most 5 groups of
Page 62 of 102
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