Common use cases for NAT

Twice NAT and Manual NAT

Here are some common tasks that can be achieved using "Network Object NAT", also known as "Auto NAT":

Enable a Server on the Inside Network to Reach the Internet Using a Public IP address
Enable Users on the Inside Network to Access the Internet Using the Outside Interface's Public IP Address
Make a Server on the Inside Network Available on a Specific Port of a Public IP Address
Translate a Range of Private IP Addresses to a Range of Public IP Addresses

Network Object NAT and Auto NAT

Here is a common task that can be achieved using "Twice NAT", also know as "Manual NAT":

Prevent a Range of IP Addresses from Being Translated When Traversing the Outside Interface