UDP Hole

Small server for "UDP hole punching" to traverse NAT between clients.

Clients send a message GAME###{game_id} and get back corresponding player's ip:port for UDP traffic

Setup

Start the UDP hole image on a server with a public ip

docker run -d -p 3400:3400/udp ghcr.io/finafisken/udp-hole:latest

Test it

Run in the terminal of two different network devices, replace X.X.X.X with servers public ip

echo -n "GAME###abc123" | nc -u X.X.X.X 3400