Network Address Translation - Network Address Translation (2)

You can configure NAT three ways on a Cisco router: static, dynamic, and NAT Overload (PAT).

The host on the private network after translation is considered to be an inside global host.

The host on the global network before translation is considered to be an outside local host.

The show ip nat statistics command displays a summary of the NAT configuration as well as counts of active translation types, hits to an existing mapping, misses (causing an attempt to create a mapping), and expired translations.

In order for NAT to provide translation services, you must have ip nat inside and ip nat outside configured on your router's interfaces.

Instead of the netmask command, you can use the prefix-length <length> statement.

Another term for port address translation is NAT Overload because that is the command used to enable port address translation.

As in access-lists, you must configure your interfaces before NAT will provide any translations. On the inside networks you would use the command ip nat inside. On the outside interface, you will use the command ip nat outside.