machines/mermet/coturn.nix

   1 { pkgs, lib, config, machineName, ipv4, ... }:
   2 let
   3   inherit (builtins.extraBuiltins) pass-chomp;
   4   inherit (config) networking;
   5   inherit (config.services) coturn;
   6   inherit (config.users) users;
   7 in
   8 {
   9 networking.nftables.ruleset = ''
  10   add rule inet filter net2fw tcp dport ${toString coturn.listening-port} counter accept comment "TURN"
  11   add rule inet filter net2fw udp dport ${toString coturn.listening-port} counter accept comment "TURN"
  12   add rule inet filter net2fw tcp dport ${toString coturn.tls-listening-port} counter accept comment "TURN TLS"
  13   add rule inet filter net2fw udp dport ${toString coturn.tls-listening-port} counter accept comment "TURN DTLS"
  14   add rule inet filter net2fw tcp dport ${toString coturn.alt-listening-port} counter accept comment "STUN"
  15   add rule inet filter net2fw udp dport ${toString coturn.alt-listening-port} counter accept comment "STUN"
  16   add rule inet filter net2fw udp dport ${toString coturn.min-port}-${toString coturn.max-port} counter accept comment "Coturn"
  17   add rule inet filter fw2net meta skuid ${users.turnserver.name} counter accept comment "Coturn"
  18 '';
  19 users.groups.acme.members = [ users.turnserver.name ];
  20 security.acme.certs."${networking.domain}" = {
  21   postRun = "systemctl try-restart coturn";
  22 };
  23 environment.systemPackages = [pkgs.coturn];
  24 systemd.services.coturn = {
  25   wants = [ "acme-selfsigned-${networking.domain}.service" "acme-${networking.domain}.service"];
  26   after = [ "acme-selfsigned-${networking.domain}.service" ];
  27 };
  28 services.coturn = {
  29   enable = true;
  30   realm = "turn.${networking.domain}";
  31   use-auth-secret = true;
  32   static-auth-secret = pass-chomp "machines/${machineName}/coturn/static-auth-secret";
  33   pkey = "/var/lib/acme/${networking.domain}/key.pem";
  34   cert = "/var/lib/acme/${networking.domain}/fullchain.pem";
  35   dh-file = "${../../../sec/openssl/dh.pem}";
  36   listening-ips = [ipv4];
  37   relay-ips = [ipv4];
  38   secure-stun = false;
  39   no-cli = false;
  40   no-udp = false;
  41   no-tcp = false;
  42   no-udp-relay = false;
  43   no-tcp-relay = false;
  44   cli-ip = "127.0.0.1";
  45   cli-password = "none";
  46   extraConfig = ''
  47     # Disallow server fingerprinting
  48     prod
  49     cipher-list="HIGH"
  50     no-multicast-peers
  51     #fingerprint
  52     verbose
  53   '';
  54 };
  55 }