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Chapter 14 Network Address Translation (NAT)

NBG6503 User’s Guide

118

14.3 General NAT Screen

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

the following screen.

Figure 83 Network > NAT > General

The following table describes the labels in this screen.

14.4 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.

Table 50 Network > NAT > General

LABEL DESCRIPTION

NAT Setup

Enable Network

Address

Translation

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

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

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

Address

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

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.

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ZyXEL NBG6503 Manuel d'utilisateur Page 118