Port Triggering”, you can view and add port triggering entry on this
page (shown in Figure 4-64). Some applications require multiple connections, like Internet games,
video conferencing, Internet telephoning and so on. Port Triggering is useful for those applications
that cannot work with a pure NAT router.
Figure 4-64 Port Triggering
Trigger Port - The port for outgoing traffic. An outgoing connection using this port will trigger
this rule.
Trigger Protocol - The protocol used for Trigger Ports, either TCP, UDP, or All (all
protocols supported by the router).
Open Port - 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 which
triggered this rule. You can input at most 5 groups of ports (or port sections). Every group of
ports must be separated with ",", for example, 2000-2038, 2046, 2050-2051, 2085,
3010-3030.
Open Protocol - The protocol used for Open Port, either TCP, UDP, or ALL (all protocols
supported by the router).
Status - The status of this entry, Enabled means the Port Triggering entry is enabled.
Edit - To modify or delete an existing entry.
Common Applications - Some popular applications already listed in the drop-down list of
Incoming Protocol.
To add a new rule, follow the steps below.
1. Click the Add New button, the next screen will pop-up as shown in Figure 4-65.
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