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Chapter 11 Network Address Translation (NAT)
NBG-460N User’s Guide
171
11.5.1 Trigger Port Forwarding Example
The following is an example of trigger port forwarding.
Figure 119 Trigger Port Forwarding Process: Example
1 Jane requests a file from the Real Audio server (port 7070).
2 Port 7070 is a “trigger” port and causes the NBG-460N to record Jane’s computer
IP address. The NBG-460N associates Jane's computer IP address with the
"incoming" port range of 6970-7170.
3 The Real Audio server responds using a port number ranging between 6970-7170.
4 The NBG-460N forwards the traffic to Jane’s computer IP address.
Name Type a unique name (up to 15 characters) for identification purposes.
All characters are permitted - including spaces.
Incoming Incoming is a port (or a range of ports) that a server on the WAN uses
when it sends out a particular service. The NBG-460N forwards the
traffic with this port (or range of ports) to the client computer on the
LAN that requested the service.
Start Port Type a port number or the starting port number in a range of port
numbers.
End Port Type a port number or the ending port number in a range of port
numbers.
Trigger The trigger port is a port (or a range of ports) that causes (or triggers)
the NBG-460N to record the IP address of the LAN computer that sent
the traffic to a server on the WAN.
Start Port Type a port number or the starting port number in a range of port
numbers.
End Port Type a port number or the ending port number in a range of port
numbers.
Apply Click Apply to save your changes back to the NBG-460N.
Reset Click Reset to begin configuring this screen afresh.
Table 60 Network > NAT > Advanced
LABEL DESCRIPTION