ZyXEL Communications P-2812HNU-51c User Manual page 165

Click NAT > Trigger Port to open the following screen. Use this screen to view
and configure your P-2812HNU-51c's trigger port settings.
Figure 73 Trigger Port
The following table describes the labels in this screen.
Table 44 NAT Trigger Port
LABEL
Service Name
WAN Interface
Trigger Port
Start
End
Protocol
Open Port
Start
End
Protocol
Add
No.
Active
Server Name
WAN Interface
P-2812HNU-51c User's Guide
DESCRIPTION
Select a pre-defined service from the drop-down list box. The pre-
defined service port number(s) and protocol will display in the Trigger
port, Open port and Protocol fields.
Otherwise, select User Define to open the Rule Setup screen where
you can manually enter the port number(s) and select the transport
layer protocol.
Select the WAN interface through which the service is forwarded.
The trigger port is a port (or a range of ports) that causes (or triggers)
the P-2812HNU-51c to record the IP address of the LAN computer that
sent the traffic to a server on the WAN.
This is the first port number that identifies a service.
This is the last port number that identifies a service.
This is the transport layer protocol used for the service.
The open port is a port (or a range of ports) that a server on the WAN
uses when it sends out a particular service. The P-2812HNU-51c
forwards the traffic with this port (or range of ports) to the client
computer on the LAN that requested the service.
This is the first port number that identifies a service.
This is the last port number that identifies a service.
This is the transport layer protocol used for the service.
Click this button to add a rule to the table below.
This is the rule index number (read-only).
This field indicates whether the rule is active or not.
Clear the check box to disable the rule. Select the check box to enable it.
This field displays the name of the service used by the packets for this
virtual server.
This field displays the WAN interface through which the service is
forwarded.
Chapter 8 Network Address Translation (NAT)
165