Is it possible to set up an FTP transfer between 2 laptops, and it doesn't matter that there are file sharing!?

Question

Browsers

For example, in Moscow there is a PC, and in Kyiv there is a PC.
Is it possible to set up a private file exchange via the FTP protocol, via an ftps connection via the Internet!?

Answer 1

It is possible if at least one of the laptops has a direct connection to the Internet with a real IP address or through a router that allows the publication of FTP servers with a real IP address on the router.

Answer 2

You can, if you forward ports (or have a white IP), at least on one computer.
Moreover, FTP is known for the fact that it works muddy with ports. He needs port 21 and another range for data.
If you use SFTP, then it needs only one port (default is 22, but it's better to use some other one)

Answer 3

install a softether vpn server on one of the computers, install a softether vpn client on another computer, connect to the server in SSL-VPN mode (not sstp/openvpn/l2tp), softether supports UDP hole punching by contacting the softether intermediate server to establish a connection, it works even when both computers are behind nat, but do not support symmetric nat ( https://habrahabr.ru/post/150298/ )
inside the vpn, transfer data with any programs.
https://www.softether.org/4-docs/2-howto/6.VPN_Ser...
https://www.softether.org/4-docs/2-howto/7.Replace...
if vpn you don't like it - bittorrent sync can also nat traversal
why no file sharing? do you know how dropbox works and what is file encryption like encfs4win?