Longshine LCS-IR2114-D - Manual (Page 35)

IP Sharing Router
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To specify the extranet port used by the virtual server Public Port
This displays the protocol used for public ports range, either TCP, UDP, Both. Type
It is the option, and you can enter some notes or not. Comment
To add/modify a virtual server entry, you can enter the above information, then click Add/Modify directly.
Note:
If you set the virtual server of the service port as 80, you must set the web management port on Admin—
Remote Management screen to be any value except 80 such as 8080. Or else there will be conflict to a
disable the Virtual server.
3.4.2 Port Triggering
Port Triggering: Allow you to do port forwarding without setting a fixed PC. By setting Port Triggering
rules, you can allow inbound traffic to arrive at a specific LAN host, using ports different than those used
for the outbound traffic. This is called port triggering since the outbound traffic triggers to which ports
inbound traffic is directed.
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.