ipfs? With ipfs p2p. It has swarm-mediated firewall traversal, and can fall back on relays within the swarm. Unfortunately, there hasn't been much progress on

ipfs? With ipfs p2p. It has swarm-mediated firewall traversal, and can fall back on relays within the swarm. Unfortunately, there hasn't been much progress on that funtionality, as the ipfs team seems to focus more on "crypto" lately. But it mostly works: http://docs.ipfs.io.ipns.localhost:8080/reference/cli/#ipfs-p2p http://docs.ipfs.io.ipns.localhost:8080/reference/cli/#ipfs-... and I guess this gives more context on relays: https://github.com/ipfs/go-ipfs/issues/7433#issuecomment-640888631 https://github.com/ipfs/go-ipfs/issues/7433#issuecomment-640... Otherwise, there is a useful library of firewall traversal libraries in any webrtc implementation.