ZyXEL Communications VSG1432-B101 - V1.10, Manual

Page: 182 / 408

Chapter 12 Network Address Translation (NAT)
VSG1432-B101 Series User’s Guide
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For example:
Figure 67 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 "open" 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).
Click Network Settings > NAT > Port Triggering to open the following screen.
Use this screen to view your ZyXEL Device’s trigger port settings.
Figure 68 Network Settings > NAT > Port Triggering
The following table describes the labels in this screen.
Table 46 Network Settings > NAT > Port Triggering
LABEL DESCRIPTION
Add new rule Click this to create a new rule.
# This is the index number of the entry.
Status This field displays whether the port triggering rule is active or not. A
yellow bulb signifies that this rule is active. A gray bulb signifies that this
rule is not active.
Service Name This field displays the name of the service used by this rule.