nixos/hosts/proxy/coturn.nix

{ pkgs, config, ... }:

let
  public_ip = "23.88.108.216";
  realm = "turn.giugl.io";
  static-auth-secret = "69duck duck fuck420";
in {
  services.coturn = rec {
    inherit realm static-auth-secret;

    secure-stun = true;
    enable = true;
    no-cli = true;
    no-tcp-relay = true;
    min-port = 49000;
    max-port = 50000;
    use-auth-secret = true;
    relay-ips = [ public_ip ];
    listening-ips = [ public_ip ];
    cert = "${config.security.acme.certs.${realm}.directory}/full.pem";
    pkey = "${config.security.acme.certs.${realm}.directory}/key.pem";
    extraConfig = ''
      verbose

      cipher-list=\"HIGH\"
      no-multicast-peers
      denied-peer-ip=0.0.0.0-0.255.255.255
      denied-peer-ip=10.0.0.0-10.255.255.255
      denied-peer-ip=100.64.0.0-100.127.255.255
      denied-peer-ip=127.0.0.0-127.255.255.255
      denied-peer-ip=169.254.0.0-169.254.255.255
      denied-peer-ip=172.16.0.0-172.31.255.255
      denied-peer-ip=192.0.0.0-192.0.0.255
      denied-peer-ip=192.0.2.0-192.0.2.255
      denied-peer-ip=192.88.99.0-192.88.99.255
      denied-peer-ip=192.168.0.0-192.168.255.255
      denied-peer-ip=198.18.0.0-198.19.255.255
      denied-peer-ip=198.51.100.0-198.51.100.255
      denied-peer-ip=203.0.113.0-203.0.113.255
      denied-peer-ip=240.0.0.0-255.255.255.255
      denied-peer-ip=::1
      denied-peer-ip=64:ff9b::-64:ff9b::ffff:ffff
      denied-peer-ip=::ffff:0.0.0.0-::ffff:255.255.255.255
      denied-peer-ip=100::-100::ffff:ffff:ffff:ffff
      denied-peer-ip=2001::-2001:1ff:ffff:ffff:ffff:ffff:ffff:ffff
      denied-peer-ip=2002::-2002:ffff:ffff:ffff:ffff:ffff:ffff:ffff
      denied-peer-ip=fc00::-fdff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
      denied-peer-ip=fe80::-febf:ffff:ffff:ffff:ffff:ffff:ffff:ffff
    '';
  };
  networking.firewall = {
    interfaces.ens3 = let
      range = with config.services.coturn; [{
        from = min-port;
        to = max-port;
      }];
    in {
      allowedUDPPortRanges = range;
      allowedUDPPorts = [ 5349 ];
      #allowedTCPPortRanges = range;
      allowedTCPPorts = [ 80 443 5349 ];
    };
  };

  services.nginx.enable = true;
  services.nginx.virtualHosts.${realm} = {
    addSSL = true;
    enableACME = true;
  };

  # to access the ACME files
  users.groups.nginx.members = [ "turnserver" ];
}