ZyXEL Communications Corporation P660HNT1AV2 Manuel D’Utilisation

Chapter 10 Network Address Translation (NAT)

P-660HN-Tx(A) v2 User’s Guide

If you need to allow packets from a specific WAN connection to your local network, NAT supports a 
default server IP address. A default server receives packets from the specified WAN connection and 
the ports that are not specified in the NAT Port Forwarding Setup screen.

Network Setting > NAT > DMZ 

The following table describes the fields in this screen. 

This chapter contains more information regarding NAT.

Inside/outside denotes where a host is located relative to the ADSL Router, for example, the 
computers of your subscribers are the inside hosts, while the web servers on the Internet are the 
outside hosts. 

Global/local denotes the IP address of a host in a packet as the packet traverses a router, for 
example, the local address refers to the IP address of a host when the packet is in the local 
network, while the global address refers to the IP address of the host when the same packet is 
traveling in the WAN side. 

Note that inside/outside refers to the location of a host, while global/local refers to the IP address 
of a host used in a packet. Thus, an inside local address (ILA) is the IP address of an inside host in 

Network Setting > NAT > DMZ

WAN Interface

Select a WAN PVC connection (PVC0~PVC7) from which you want to forward the traffic 
to the specified default server.

Default Server 
Address

Enter the IP address of the default server which receives packets from ports that are not 
specified in the NAT > Port Forwarding screen. 

Note: If you do not assign a Default Server Address, the ADSL Router discards all 

packets received for ports that are not specified in the NAT Port Forwarding 
screen.

Apply

Click Apply to save your changes.

Cancel

Click Cancel to restore your previously saved settings.