Well it's abandoned and experimental, and there are better ways to hole punch than what I did, e.g. using STUN and TURN. But yeah it could replace one ngrok use

Well it's abandoned and experimental, and there are better ways to hole punch than what I did, e.g. using STUN and TURN. But yeah it could replace one ngrok use case, though I think ngrok does not do L2/3 bridges. Also: I think technically this was my first Go program (https://github.com/binwiederhier/re https://github.com/binwiederhier/re), but that was so tiny that it doesn't really count. ;-)