UDP hole punching

https://habr.com/ru/articles/142858/

TCP

https://habr.com/ru/articles/142858/

ngrok

https://habr.com/ru/articles/142858/

frp

https://github.com/fatedier/frp

delfer

https://delfer.ru/2019/12/28/%d0%b7%d0%b0%d0%bf%d1%83%d1%81%d0%ba%d0%b0%d0%b5%d0%bc-%d1%81%d0%be%d0%b1%d1%81%d1%82%d0%b2%d0%b5%d0%bd%d0%bd%d1%8b%d0%b9-ngrok/