Basic Setup of an FTD NAT

There are 3 types of NATs on a FTD:

1. NAT Rules Before. This is equivalent to Twice NAT (section 1) on classic ASA.
2. Auto NAT Rules. Section 2 on classic ASA
3. NAT Rules After. This is equivalent to Twice NAT (section 3) on classic ASA.

https://www.cisco.com/c/en/us/support/docs/security/firepower-management-center/212702-configure-and-verify-nat-on-ftd.html

NAT Rules After - > PAT Overload

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This is where you want to place your PAT Overload statements for Internet access.

NAT Rules Before - > PAT

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This is a config for doing PAT with inbound connections.

NAT Rules Before - > 1 to 1 NAT

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This is a config for doing a 1:10 with inbound/outbound connections.