Chapter 8 Network Address Translation (NAT)

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

This is the first trigger port number that identifies a service.

Port

 

 

 

Trigger End

This is the last trigger port number that identifies a service.

Port

 

 

 

Trigger Proto.

This is the trigger transport layer protocol. 1 means TCP, 2 means UDP

 

and 3 means TCP/UDP.

 

 

Open Start

This is the first open port number that identifies a service.

Port

 

 

 

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.

 

 

 

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P-870HN-51D User’s Guide