ZyXEL Communications NBG420N User Manual

 Chapter 11 Network Address Translation (NAT)

NBG420N User’s Guide

The following table describes the labels in this screen.

Port forwarding allows you to define the local servers to which the incoming services will be 
forwarded. To change your NBG420N’s port forwarding settings, click Network > NAT > 
Application. The screen appears as shown.

"

If you do not assign a Default Server IP address in the NAT > General 
screen, the NBG420N discards all packets received for ports that are not 
specified in this screen or remote management.

 for port numbers commonly used for particular services.

Table 53   Network > NAT > General

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 NBG420N discards all 

packets received for ports that are not specified in the Application screen or 

remote management.

Wake up this 

target by Wake 

On LAN

Select this to use WoL (Wake On LAN) to turn on the server specified in the 

Server IP Address field when packets are received on ports not specified in the 

Application screen. 

Note: For more information on Wake On LAN see 

Apply

Click Apply to save your changes back to the NBG420N.

Reset

Click Reset to begin configuring this screen afresh.