Two Way NAT

[Sagar4]

In what scenario is two way NAT used?

[balaji.bandi]

best examples here mentioned :

https://www.practicalnetworking.net/series/nat/policy-nat-twice-nat/

if this is cisco ASA here is the good doc for reference :

https://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next-generation-firewalls/72273-dns-doctoring-3zones.html

[paul driver]

Hello
when you say two way nat can you be more precise-do you mean twice nat which is nattiing both source and destination addressing?

[Sagar4]

Two way nat is also called as twice nat.

[paul driver]

Hello
So just to confirm, you wish understand when you would implement and NAT both source/destination addressing correct? 

[Sagar4]

Yes, you understood my doubt correctly. I was asking if there are situations where two way NAT is being used. By checking link in your previous reply, what I understood so far is that it's being used for accessing a public server by multiple local hosts. A static PAT can do that as well though only for a single local host. Correct me if I'm wrong.

[MHM Cisco World]

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[Joseph W. Doherty]

You might need to clarify where you've seen the term "two way NAT" used, as, it appears, some devices use slightly different terminology for doing NAT in two directions and/or when/where both source and destination addressed are NATted.  (See also double NAT and twice NAT.)

One reference I found using the term "two way NAT" also refers to it as Bi-Directional NAT.  Perhaps you can check if what that reference describes is what you have in mind, and possibly, that reference's explanation clarifies why you would use it.  There's also a rather old topic thread using this term too.