ZyXEL NBG-417N Manuale Utente

Chapter 11 Network Address Translation (NAT)

NBG-417N User’s Guide

The following table describes the labels in this screen.

Table 44   NAT Application

Add Application Rule
Active 

Select the check box to enable this rule and the requested service can 
be forwarded to the host with a specified internal IP address.

Clear the checkbox to disallow forwarding of these ports to an inside 
server without having to delete the entry. 

Service Name

Type a name (of up to 31 printable characters) to identify this rule in 
the first field next to Service Name. Otherwise, select a predefined 
service in the second field next to Service Name. The predefined 
service name and port number(s) will display in the Service Name and 
Port fields.

Local Port 
Range

Public Port 
Range

Type a port number(s) to be forwarded.

To specify a range of ports, enter a hyphen (-) between the first port 
and the last port, such as 10-20.

To specify two or more non-consecutive port numbers, separate them 
by a comma without spaces, such as 123,567.

Server IP 
Address

Type the inside IP address of the server that receives packets from the 
port(s) specified in the Port field.

Apply

Click Apply to save your changes to the Application Rules Summary 
table.

Reset

Click Reset to not save and return your new changes in the Service 
Name and Port fields to the previous one.

Application Rules Summary
#

This is the number of an individual port forwarding server entry.

Active

This icon is turned on when the rule is enabled. 

Name

This field displays a name to identify this rule.

Local Start/End 
Port

Public Start/End 
Port

This field displays the port number(s). 

Server IP 
Address

This field displays the inside IP address of the server.

Modify

Click the Edit icon to display and modify an existing rule setting in the 
fields under Add Application Rule. 

Click the Remove icon to delete a rule.