Enabling NAT

When traffic subject to translation originates from or is destined to an interface, that interface must be enabled for NAT. If the interface is part of the internal private network, it should be enabled as an inside interface by configuring an inside source list. If the interface is part of the external public network, it should be enabled as an outside interface by configuring an outside source list.

Use the ip | ipv6 nat inside command in interface configuration mode to enable an inside interface.

Use the ip | ipv6 nat outside command in interface configuration mode to enable an outside interface.