Chapter 8 Network Address Translation (NAT)

The following table describes the labels in this screen.

Table 37 NAT Port Forwarding

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 External

 

port, Internal 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 IP protocol.

 

 

WAN Interface

Select the WAN interface through which the service is forwarded.

 

You must have already configured a WAN connection with NAT enabled.

 

 

Server IP

Enter the IP address of the server for the specified service.

Address

 

 

 

External Port

Enter the original destination port for the packets.

Start

To forward only one port, enter the port number again in the External

 

 

Port End field.

 

To forward a series of ports, enter the start port number here and the

 

end port number in the External Port End field.

 

 

External Port

Enter the last port of the original destination port range.

End

To forward only one port, enter the port number in the External Port

 

 

Start field above and then enter it again in this field.

 

To forward a series of ports, enter the last port number in a series that

 

begins with the port number in the External Port Start field above.

 

 

Internal Port

Enter the port number to which you want the P-870HN-51D to translate

Start

the incoming port.

 

To forward only one port, enter the port number again in the Internal

 

Port End field.

 

For a range of ports, enter the first number of the range to which you

 

want the incoming ports translated.

 

 

Internal Port

Enter the last port of the translated port range.

End

 

 

 

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.

 

 

External Start

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

Port

 

 

 

External End

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

Port

 

 

 

 

131

P-870HN-51D User’s Guide