Port backflow, how to configure NAT?

[Wang]

Hello，Hello, engineers, can you help me solve this problem?

[Nick_Doropoulos]

Hi Wang,

Could you please provide us with a bit more detail on what it is you need with regards to NAT?

Thanks.

[Wang]

The Intranet server maps the application to a public network address. The Intranet client accesses the public network address mapped by the Intranet server and then accesses the application on the Intranet server.

[PhoneBoy]

Backflow doesn't have any meaning to me with respect to NAT.
The more details you can provide about what exactly you're trying to achieve, what exactly you've configured, the kind of traffic involved, and behavior you're seeing, the more likely we'll be able to help you.

[Wang]

How can NAT be configured to prevent dropped logs from appearing when backflow occurs

[PhoneBoy]

I still don’t know what you’ve exactly configured or what “backflow” is.
Please provide more details as requested so we can understand the problem and point you in the right direction.

[Chris_Atkinson]

A few suggestions come to mind here but I'm not sure I understand the requirement fully.

You can NAT the source and destination on the same rule if that is requirement using manual NAT

Also to configure bi-di NAT please refer:

How to configure bidirectional NAT 

Alternately the following may be relevant in some NAT / VPN scenarios...

Global Properties > Remote Access > Enable Back connections from gateway to client