NAT on FTD

autonat = object net

manual nat = twice NAT

In the example below we want to give a DMZ server an public IP

On ASA you can write NAT's on CLI

In FTD this is not possible

1 - Go to Objects -> Object Management

Create 

INSIDE IP object

PUBLIC IP as object

2 - Go to Devices -> NAT

Edit the policy for the device you are working on

Add NAT rule

Choose Manual NAT rule

Insert into NAT rule before

Type: Static

Interface

Source: DMZ

Destination: OUTSIDE

Translation

Original Source: Select inside IP object

Translated Source: Select outside IP object 

PAT pool

Leave unchecked

Advanced

Uncheck unidirectional

check Do no proxy ARP on destination interface