# NAT

Network Address Translation - Default = Disabled.

## NAT Private Network Table

NAT technology is a method by which IP addresses are mapped from one address space to another. In Viper, it is normally used on the WAN side of an IP network to hide local IP addresses from an external IP network (i.e. Internet). On all Viper units, the user can select which one out of the two interfaces (Ethernet or RF) will be considered private.

The following parameters allow the user to customize the NAT firewall protection.

### ETH (hidden by NAT):

The Network Address Translation Table hides the IP Addresses on the Ethernet side.

### RF (hidden by NAT):

The Network Address Translation Table hides the IP Addresses on the RF side.

### User X:

A specific IP Address or Subnet can be specified and will be hidden by the Network Address Translation Table.

## NAT Port Forwarding Table

This table allows the user to specify a particular public port or range of ports to be forwarded to the private network hidden by Network Address Translation Table.

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