Trigger Port Forwarding Example - ZyXEL Communications NBG-4600N User Manual

Table 60 Network > NAT > Advanced
LABEL
Name
Incoming
Start Port
End Port
Trigger
Start Port
End Port
Apply
Reset

11.5.1 Trigger Port Forwarding Example

The following is an example of trigger port forwarding.
Figure 119 Trigger Port Forwarding Process: Example
Jane requests a file from the Real Audio server (port 7070).
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Port 7070 is a "trigger" port and causes the NBG-460N to record Jane's computer
2
IP address. The NBG-460N associates Jane's computer IP address with the
"incoming" port range of 6970-7170.
The Real Audio server responds using a port number ranging between 6970-7170.
3
The NBG-460N forwards the traffic to Jane's computer IP address.
4
NBG-460N User's Guide
DESCRIPTION
Type a unique name (up to 15 characters) for identification purposes.
All characters are permitted - including spaces.
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.
Type a port number or the starting port number in a range of port
numbers.
Type a port number or the ending port number in a range of port
numbers.
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.
Type a port number or the starting port number in a range of port
numbers.
Type a port number or the ending port number in a range of port
numbers.
Click Apply to save your changes back to the NBG-460N.
Click Reset to begin configuring this screen afresh.
Chapter 11 Network Address Translation (NAT)
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