Chapter 16 Network Address Translation (NAT)

16.3 General NAT Screen

Use this screen to enable NAT and set a default server. Click Network > NAT > General to open the following screen.

Figure 99 Network > NAT > General

The following table describes the labels in this screen.

Table 63 Network > NAT > General

LABEL

DESCRIPTION

NAT Setup

 

 

 

Enable Network

Network Address Translation (NAT) allows the translation of an Internet protocol address

Address

used within one network (for example a private IP address used in a local network) to a

Translation

different IP address known within another network (for example a public IP address used on

 

the Internet).

 

Select the check box to enable NAT.

 

 

Default Server Setup

 

 

Server IP

In addition to the servers for specified services, NAT supports a default server. A default

Address

server receives packets from ports that are not specified in the Application screen.

 

If you do not assign a Default Server IP address, the Router discards all packets received

 

for ports that are not specified in the Application screen or remote management.

 

 

Apply

Click Apply to save your changes back to the Router.

 

 

Reset

Click Reset to begin configuring this screen afresh.

 

 

16.4 NAT Application Screen

Use the Application screen to forward incoming service requests to the server(s) on your local network. You may enter a single port number or a range of port numbers to be forwarded, and the local IP address of the desired server. The port number identifies a service; for example, web service is on port 80 and FTP on port 21. In some cases, such as for unknown services or where one server can support more than one service (for example both FTP and web service), it might be better to specify a range of port numbers.

In addition to the servers for specified services, NAT supports a default server. A service request that does not have a server explicitly designated for it is forwarded to the default server. If the default is not defined, the service request is simply discarded.

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NBG-419N v2 User’s Guide