{flake, config, lib, ...}: { age.secrets."coturn-static-auth-secret" = { file = "${flake.self}/secrets/coturn-static-auth-secret.age"; mode = "400"; owner = "turnserver"; }; services.coturn = rec { enable = true; no-cli = true; no-tcp-relay = true; min-port = 49000; max-port = 50000; use-auth-secret = true; static-auth-secret-file = "/run/agenix/coturn-static-auth-secret"; realm = "turn.pub.solar"; cert = "${config.security.acme.certs.${realm}.directory}/full.pem"; pkey = "${config.security.acme.certs.${realm}.directory}/key.pem"; extraConfig = let externalIPv4s = lib.strings.concatMapStringsSep "\n" ({address, ...}: "external-ip=${address}") config.networking.interfaces.enp35s0.ipv4.addresses; externalIPv6s = lib.strings.concatMapStringsSep "\n" ({address, ...}: "external-ip=${address}") config.networking.interfaces.enp35s0.ipv6.addresses; in '' ${externalIPv4s} ${externalIPv6s} no-tlsv1 no-tlsv1_1 no-rfc5780 response-origin-only-with-rfc5780 prod no-stun-backward-compatibility # ban private IP ranges no-multicast-peers denied-peer-ip=0.0.0.0-0.255.255.255 denied-peer-ip=10.0.0.0-10.255.255.255 denied-peer-ip=100.64.0.0-100.127.255.255 denied-peer-ip=127.0.0.0-127.255.255.255 denied-peer-ip=169.254.0.0-169.254.255.255 denied-peer-ip=172.16.0.0-172.31.255.255 denied-peer-ip=192.0.0.0-192.0.0.255 denied-peer-ip=192.0.2.0-192.0.2.255 denied-peer-ip=192.88.99.0-192.88.99.255 denied-peer-ip=192.168.0.0-192.168.255.255 denied-peer-ip=198.18.0.0-198.19.255.255 denied-peer-ip=198.51.100.0-198.51.100.255 denied-peer-ip=203.0.113.0-203.0.113.255 denied-peer-ip=240.0.0.0-255.255.255.255 denied-peer-ip=::1 denied-peer-ip=64:ff9b::-64:ff9b::ffff:ffff denied-peer-ip=::ffff:0.0.0.0-::ffff:255.255.255.255 denied-peer-ip=100::-100::ffff:ffff:ffff:ffff denied-peer-ip=2001::-2001:1ff:ffff:ffff:ffff:ffff:ffff:ffff denied-peer-ip=2002::-2002:ffff:ffff:ffff:ffff:ffff:ffff:ffff denied-peer-ip=fc00::-fdff:ffff:ffff:ffff:ffff:ffff:ffff:ffff denied-peer-ip=fe80::-febf:ffff:ffff:ffff:ffff:ffff:ffff:ffff ''; }; networking.firewall = { interfaces.enp35s0 = let range = with config.services.coturn; [ { from = min-port; to = max-port; } ]; in { allowedUDPPortRanges = range; allowedUDPPorts = [ 3478 5349 ]; allowedTCPPortRanges = [ ]; allowedTCPPorts = [ 3478 5349 ]; }; }; # get a certificate security.acme.certs.${config.services.coturn.realm} = { /* insert here the right configuration to obtain a certificate */ postRun = "systemctl restart coturn.service"; group = "turnserver"; }; services.nginx.virtualHosts.${config.services.coturn.realm} = { enableACME = true; addSSL = true; globalRedirect = "pub.solar"; }; users.users.nginx.extraGroups = [ "turnserver" ]; }