And again, an interesting question about traffic tunneling

Dear habraly people, do you know how to make available on the Internet the port of the computer I need that is connected to the Internet via NAT (need a windows solution)?

I see myself a solution to the problem in this form:
1) We install special software on some server on the Internet that opens some port available on the Internet
2) A computer hidden behind NAT connects to our server itself and leaves an open connection.
3) Traffic is tunneled through this connection.

I do not propose the option of picking in a NAT router (forwarding router port-port within the network).