UDP holepunch through QUIC. I've tested it via an aws server, and it seems to work. It has two modes:

• Do a simple server-peer run like:

  go run quic-holepunch -port=:<port> -remoteAddr=<remote address>:<remote port>

  This will attempt to dial a remote peer who already has <remote port> open. On the server side, it is simply:

  go run quic-holepunch -port=:<port> -remoteAddr=none

  Note that you need the none there, otherwise it will run in rendezvous mode. If two peers have a predictable NAT (ie. external port == internal port), you can use the first command on each peer with the others remote address and port

• Do a rendezvous-(peer-peer) like: Start the server with:

  go run quic-holepunch -port=:<port>

  Then run

  go run quic-holepunch -port=:<port> -peerID=<peerID> -rendezvousAddr=<rendezvous server>:<rendezvous port>

  on each peer. Make sure to pick a different peerID for each one.