hosts/mermet/coturn.nix

   1 { inputs, pkgs, lib, config, hostName, ipv4, ... }:
   2 let
   3   inherit (config.networking) domain;
   4   inherit (config.services) coturn;
   5   inherit (config.users) users;
   6 in
   7 {
   8 networking.nftables.ruleset = ''
   9   table inet filter {
  10     chain input-net {
  11       meta l4proto { udp, tcp } th dport ${toString coturn.listening-port} counter accept comment "TURN"
  12       meta l4proto { udp, tcp } th dport ${toString coturn.tls-listening-port} counter accept comment "TURN (D)TLS"
  13       meta l4proto { udp, tcp } th dport ${toString coturn.alt-listening-port} counter accept comment "STUN"
  14       udp dport ${toString coturn.min-port}-${toString coturn.max-port} counter accept comment "Coturn"
  15     }
  16     chain output-net {
  17       meta skuid ${users.turnserver.name} counter accept comment "Coturn"
  18     }
  19   }
  20 '';
  21 users.groups.acme.members = [ users.turnserver.name ];
  22 security.acme.certs."${domain}" = {
  23   postRun = "systemctl try-restart coturn";
  24 };
  25 environment.systemPackages = [pkgs.coturn];
  26 systemd.services.coturn = {
  27   wants = [ "acme-selfsigned-${domain}.service" "acme-${domain}.service"];
  28   after = [ "acme-selfsigned-${domain}.service" ];
  29 };
  30 services.coturn = {
  31   enable = true;
  32   realm = "turn.${domain}";
  33   use-auth-secret = true;
  34   static-auth-secret = lib.readFile coturn/static-auth-secret.clear;
  35   pkey = "/var/lib/acme/${domain}/key.pem";
  36   cert = "/var/lib/acme/${domain}/fullchain.pem";
  37   dh-file = lib.readFile coturn/dh4096.pem;
  38   listening-ips = [ipv4];
  39   relay-ips = [ipv4];
  40   secure-stun = false;
  41   no-cli = false;
  42   no-udp = false;
  43   no-tcp = false;
  44   no-udp-relay = false;
  45   no-tcp-relay = false;
  46   cli-ip = "127.0.0.1";
  47   cli-password = "none";
  48   extraConfig = ''
  49     # Disallow server fingerprinting
  50     prod
  51     cipher-list="HIGH"
  52     no-multicast-peers
  53     #fingerprint
  54     #verbose
  55   '';
  56 };
  57 }