Confusing about Dynamic and Static NAT

[Boon Keat Gan]

Dear All,

I have this configuration:-

static (inside,outside) smtp1_extern smtp1_intern netmask 255.255.255.255 0 0

static (inside,outside) smtp2_extern smtp2_intern netmask 255.255.255.255 0 0

and

global (outside) 1 smtp1_extern netmask 255.255.255.224

nat (internal) 1 smtp1_intern 255.255.255.255 0 0

global (outside) 2 smtp2_extern netmask 255.255.255.224

nat (internal) 2 smtp2_intern 255.255.255.255 0 0

Is there a different in the dynamic NAT vs the static NAT?

Can I said if i just apply the dynamic NAT, the command in static NAT also will include?

Static NAT is 1 way protocol and dynamic NAT allow 2 way communication? Please correct me. Thanks.

[ajay chauhan]

When we do static NAT means it has got another indentity from outside mean 2 way.

With PAT its one way.

Dynamic nat can be based on NAT POOL /PAT. While static nat is one to one.

More infor here-http://www.cisco.com/en/US/docs/security/asa/asa82/configuration/guide/nat_dynamic.html

Thanks

Ajay