ZyXEL Communications wireless n gigbit router zyxel Manual Do Utilizador

 Chapter 11 Network Address Translation (NAT)

NBG-460N User’s Guide

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).

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.

The Real Audio server responds using a port number ranging between 6970-7170.

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