User's Manual
Conguring Security Settings
6.6 Port Triggering
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Click in the “DMZ Host IP Address” check box, then enter the IP address of 2.
the computer to be designated as a DMZ host. Note that only one network
computer can be a DMZ host at any time.
Click 3. Apply.
Click in the “DMZ Host IP Address” check box again to disable the DMZ host.
6.6 Port Triggering
Port triggering can be described as dynamic port forwarding. By setting port
triggering rules, inbound traffic will be allowed to arrive at a specific network
host using ports different than those used for outbound traffic. When using port
triggering, the outbound traffic triggers the ports at which inbound traffic
is directed.
For example, a gaming server is accessed using UDP protocol on port 2222. The
gaming server then responds by connecting the user using UDP on port 3333
when a gaming session is initiated. In this case, port triggering must be used,
since it conflicts with the following default firewall settings:
The firewall blocks inbound traffic by default. t
The server replies to the FiOS Router’s IP, and the connection is not sent back t
to the host, since it is not part of a session.
To resolve the conflict, a port triggering entry must be defined, which allows
inbound traffic on UDP port 3333 only after a network host generated traffic to
UDP port 2222. This results in the FiOS Router accepting the inbound traffic from
the gaming server, and sending it back to the network host which originated
the outgoing traffic to UDP port 2222.