State difference between Automatic NAT and Manual NAT.

Answer»

NAT (Network ADDRESS Translation) can be configured in Checkpoint Firewall either manually or AUTOMATICALLY.

Automatic NAT	Manual NAT
The firewall automatically creates this rule.	Administrators create this rule manually.
You cannot modify it.	It can be modified.
It cannot PERFORM DUAL NAT (if two or more routers on a network perform NAT).	It can perform DUAL NAT.
A proxy ARP (Address Resolution Protocol) is CREATED automatically. It is ENABLED by default.	A proxy ARP (Address Resolution Protocol) is created manually. It is not enabled by default.

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