ASA NAT Question

[zekebashi]

Hello, 

I'm novice to Firewalling and have a simple question. Can someone explain to me what these NAT statement mean or how they work? 

global (outside) 1

global (outside) 2 

nat (outside) 0

nat (dmz) 0

Thanks in advance. 

~zK 

[Pawan Raut]

global (outside) 1 and global (outside) 2  --> Interface PAT for the source

nat (outside) 0  and nat (dmz) 0  --> NAT exemption