ZyXEL NBG-460N User Guide - Page 161
Trigger Port Forwarding Example
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Chapter 11 Network Address Translation (NAT) Table 57 Network > NAT > Advanced LABEL DESCRIPTION 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. 11.5.1 Trigger Port Forwarding Example The following is an example of trigger port forwarding. Figure 108 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. NBG-460N User's Guide 161