Netgear UTM9S – ProSECURE Unified Threat Management (UTM) Appliance with DSL and Wireless modules Manual De Referência

Configure Network Address Translation (All Models)

Network Address Translation (NAT) allows all PCs on your LAN to share a single public 
Internet IP address. From the Internet, there is only a single device (the UTM) and a single IP 
address. PCs on your LAN can use any private IP address range, and these IP addresses 
are not visible from the Internet.

Note the following about NAT:

The UTM uses NAT to select the correct PC (on your LAN) to receive any incoming data. 

If you have only a single public Internet IP address, you need to use NAT (the default 

setting).

If your ISP has provided you with multiple public IP addresses, you can use one address 

as the primary shared address for Internet access by your PCs, and you can map 
incoming traffic on the other public IP addresses to specific PCs on your LAN. This 
one-to-one inbound mapping is configured using an inbound firewall rule.

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Select Network Config > WAN Settings > WAN Mode. The WAN Mode screen 
displays (see 

In the NAT (Network Address Translation) section of the screen, select the NAT radio button.

Click Apply to save your settings.

Configure Classical Routing (All Models)

In classical routing mode, the UTM performs routing, but without NAT. To gain Internet 
access, each PC on your LAN needs to have a valid static Internet IP address. 

If your ISP has allocated a number of static IP addresses to you, and you have assigned one 
of these addresses to each PC, you can choose classical routing. Or, you can use classical 
routing for routing private IP addresses within a campus environment.

To view the status of the WAN ports, you can view the Router Status screen (see