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Page 47 of 78
Port trigger is used to restrict certain types of data packets from your local network to Internet. 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 Trigger is used for some of these
applications that can work with an NAT Router, which can be helpful in securing and restricting your
local network.
Figure 4-29
Nat Port rigger:
Enable or disable the port trigger function on the device. After selecting, click
the
Apply Changes
button to save your configuration.
Application Type:
You can select the service from the “
Usual Application Name
” and then
the following parameters, Match Port, Trigger Protocol, Relate Port and Open Protocol, will be
automatically filled. You can also de
fine the application by yourself in the “
User-defined
Application Name
” field. But, you need to fill the following related parameters manually.
Start Match Port / End Match port:
The start and end port to match.
Trigger Protocol:
The protocol to trigger the rule, it can be TCP, UDP or TCP/UDP.
Start Relate Port / End Relate Port:
The start and end related port.
