User Manual

Chapter 9 WAN
NBG7815 User’s Guide
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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.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).
Use this screen to view the summary table of your NBG7815’s port trigger settings. Click Expert Mode >
WAN > NAT > Port Trigger to show the following screen.
Note: Only one LAN computer can use a trigger port (range) at a time.
Figure 50 Expert Mode > WAN > NAT > Port Trigger
The following table describes the labels in this screen.
9.7.1 Add Port Trigger Rule Screen
Use this screen to configure your NBG7815’s port trigger settings. Click Expert Mode > WAN > NAT > Port
Trigger > Add Rule to show the following screen.
Table 28 Expert Mode > WAN > NAT > Port Trigger
LABEL DESCRIPTION
Port Trigger Rules (Max Limit: 32)
No. This is the rule index number.
Name This field displays a name to identify this rule.
Incoming Port This field displays a port number that a server on the WAN uses when it sends out a particular
service.
End Port This field displays a port number or the final port number in a range of port numbers.
Trigger Port This field displays a port number that causes the NBG7815 to record the IP address of the LAN
computer that sent then traffic to a server on the WAN.
End Port This field displays a port number or the ending port number in a range of port numbers.
Actions Click the icons under Actions to delete or edit an existing trigger port settings.
Click to delete the rule.
Click to edit the rule.