can you please explain briefly what the NAT overlapping is, and how can i configure the nating for it?
I think that you're referring when you have overlapping IPs on different segments?
For example there's a LAN 10.0.0.0/8 and another LAN that needs to communicate with is 10.1.1.0/24?
The above is an IP overlapping issue that can be resolved with NAT.
You basically NAT both networks to a different IP range so they will be able to communicate.
Is this what you're looking for?