ZyXEL g-2000 plusv2 사용자 가이드

ZyXEL G-2000 Plus v2 User’s Guide

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Chapter 8 Single User Account (SUA) / Network Address Translation (NAT)

The following is an example of trigger port forwarding.

Figure 45   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 ZyXEL device to record Jane’s computer IP 

address. The ZyXEL device 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 ZyXEL device forwards the traffic to Jane’s computer IP address. 

5 Only Jane can connect to the Real Audio server until the connection is closed or times 

out. The ZyXEL device times out in three minutes with UDP (User Datagram Protocol), 
or two hours with TCP/IP (Transfer Control Protocol/Internet Protocol). 

1 Trigger events only happen on data that is going coming from inside the ZyXEL device 

and going to the outside.

2 If an application needs a continuous data stream, that port (range) will be tied up so that 

another computer on the LAN can’t trigger it. 

To change your ZyXEL device’s trigger port settings, click SUA/NAT and the Trigger Port 
tab. The screen appears as shown.

Note: Only one LAN computer can use a trigger port (range) at a time