Hello Bruce
Although it is true that the vast majority of NAT configurations are indeed nat (inside,outside)
, there are situations where the nat(outside,inside)
scenario is useful. One such example is if you have a web server that is on the Internet that you want users on the inside of a network to access using an internal private address.
This example can be seen in the following Cisco documentation on pages 2 to 4 in a section titled “NAT for Inside Hosts (Dynamic NAT) and NAT for an Outside Web Server (Static NAT)”
I hope this has been helpful!
Laz