Chapter 8 Network Address Translation (NAT)
P-870HN-51D User’s Guide
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The following table describes the labels in this screen.
Table 39 NAT Trigger Port
LABEL DESCRIPTION
Service Name 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.
WAN Interface Select the WAN interface through which the service is forwarded.
Trigger Port The trigger port is a port (or a range of ports) that causes (or triggers)
the P-870HN-51D to record the IP address of the LAN computer that
sent the traffic to a server on the WAN.
Start This is the first port number that identifies a service.
End This is the last port number that identifies a service.
Protocol This is the transport layer protocol used for the service.
Open Port 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-870HN-51D forwards
the traffic with this port (or range of ports) to the client computer on the
LAN that requested the service.
Start This is the first port number that identifies a service.
End This is the last port number that identifies a service.
Protocol This is the transport layer protocol used for the service.
Add Click this button to add a rule to the table below.
No. This is the rule index number (read-only).
Active 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.
Server Name This field displays the name of the service used by the packets for this
virtual server.
WAN Interface This field displays the WAN interface through which the service is
forwarded.
Trigger Start
Port
This is the first trigger port number that identifies a service.
Trigger End
Port
This is the last trigger port number that identifies a service.
Trigger Proto. This is the trigger transport layer protocol. 1 means TCP, 2 means UDP
and 3 means TCP/UDP.
Open Start
Port
This is the first open port number that identifies a service.
Open End Port This is the last open port number that identifies a service.
Open Proto. This is the open transport layer protocol. 1 means TCP, 2 means UDP
and 3 means TCP/UDP.
Modify Click the Edit icon to go to the screen where you can edit the rule.
Click the Remove icon to delete an existing rule. Note that subsequent
rules move up by one when you take this action.
