implementation - Implementing autonomous NAT to NAT communication in Python -

I was searching for a while from peer-to-peer communication between the two hosts of NAT, when I

My idea is what he does: Try out the basic outline mentioned in the above page under the "How do I work" section and plan to implement it. "Does the machine send a UDP packet to machine B by A?" What is a send packet on the IP address / router address that appears globally on Machine B? Apart from this, would the unsupported UDP packet streams be sent from both sides in an established connection?

Thank you!

This is what I understood:

Machine A Machine B UDP packets send to NAT, which is expected to fall, machine B UDP pocket machine sends the NAT to A, which is likely to be omitted. NAT of Machine B believes that machine A's UDP packet machine is in the north of UDP packets of B and machine B sends machine B Machine B for machine A reacts with UDP for machine A and machine A NAT also will not be left as it thinks that the answer is in the establishment of UDP communication for Machine A's UDP Packet!