113 lines
4.1 KiB
Nix
113 lines
4.1 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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cfg = config.services.coturn;
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fqdn = "turn.jalr.de";
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inherit (config.networking) ports;
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in
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{
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sops.secrets.turn-static-auth-secret = {
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owner = "turnserver";
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sopsFile = ../secrets.yaml;
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};
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services.coturn = (
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if ports.coturn-plain.tcp != ports.coturn-plain.udp then builtins.abort "coturn: plain TCP and UDP ports must match."
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else if ports.coturn-tls.tcp != ports.coturn-tls.udp then builtins.abort "coturn: TLS TCP and UDP ports must match."
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else if lib.lists.length ports.coturn-plain.tcp != 2 then builtins.abort "coturn: exactly two plain ports must be given."
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else if lib.lists.length ports.coturn-tls.tcp != 2 then builtins.abort "coturn: exactly two TLS ports must be given."
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else {
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listening-port = builtins.elemAt ports.coturn-plain.tcp 0;
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alt-listening-port = builtins.elemAt ports.coturn-plain.tcp 1;
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tls-listening-port = builtins.elemAt ports.coturn-tls.tcp 0;
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alt-tls-listening-port = builtins.elemAt ports.coturn-tls.tcp 1;
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cli-port = ports.coturn-cli.tcp;
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min-port = ports.coturn-relay.udp.from;
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max-port = ports.coturn-relay.udp.to;
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}
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) // {
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enable = true;
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# config adapted from synapse’s turn howto:
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# https://github.com/matrix-org/synapse/blob/develop/docs/turn-howto.md
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use-auth-secret = true;
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realm = fqdn;
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# the NixOS module does not support loading the secret from a dedicated file
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static-auth-secret-file = config.sops.secrets.turn-static-auth-secret.path;
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no-tcp-relay = true;
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no-cli = true;
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extraConfig = ''
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denied-peer-ip=10.0.0.0-10.255.255.255
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denied-peer-ip=192.168.0.0-192.168.255.255
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denied-peer-ip=172.16.0.0-172.31.255.255
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# https://www.rtcsec.com/article/cve-2020-26262-bypass-of-coturns-access-control-protection/
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no-multicast-peers
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denied-peer-ip=0.0.0.0-0.255.255.255
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denied-peer-ip=10.0.0.0-10.255.255.255
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denied-peer-ip=100.64.0.0-100.127.255.255
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denied-peer-ip=127.0.0.0-127.255.255.255
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denied-peer-ip=169.254.0.0-169.254.255.255
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denied-peer-ip=172.16.0.0-172.31.255.255
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denied-peer-ip=192.0.0.0-192.0.0.255
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denied-peer-ip=192.0.2.0-192.0.2.255
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denied-peer-ip=192.88.99.0-192.88.99.255
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denied-peer-ip=192.168.0.0-192.168.255.255
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denied-peer-ip=198.18.0.0-198.19.255.255
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denied-peer-ip=198.51.100.0-198.51.100.255
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denied-peer-ip=203.0.113.0-203.0.113.255
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denied-peer-ip=240.0.0.0-255.255.255.255
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denied-peer-ip=::1
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denied-peer-ip=64:ff9b::-64:ff9b::ffff:ffff
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denied-peer-ip=::ffff:0.0.0.0-::ffff:255.255.255.255
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denied-peer-ip=100::-100::ffff:ffff:ffff:ffff
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denied-peer-ip=2001::-2001:1ff:ffff:ffff:ffff:ffff:ffff:ffff
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denied-peer-ip=2002::-2002:ffff:ffff:ffff:ffff:ffff:ffff:ffff
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denied-peer-ip=fc00::-fdff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
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denied-peer-ip=fe80::-febf:ffff:ffff:ffff:ffff:ffff:ffff:ffff
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user-quota=12
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total-quota=1200
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'';
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};
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systemd.services.coturn = {
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after = [ "acme-finished-${fqdn}.target" ];
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serviceConfig = {
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Environment = [
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"CERT_FILE=%d/fullchain.pem"
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"KEY_FILE=%d/key.pem"
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];
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LoadCredential = [
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"fullchain.pem:${config.security.acme.certs."${fqdn}".directory}/fullchain.pem"
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"key.pem:${config.security.acme.certs."${fqdn}".directory}/key.pem"
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];
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ExecStartPre = lib.singleton "${pkgs.writeShellScript "coturn-setup-tls" ''
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cat >> /run/coturn/turnserver.cfg << EOF
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cert="$CERT_FILE";
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pkey="$KEY_FILE";
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EOF
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''}";
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};
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};
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security.acme.certs."${fqdn}".postRun = ''
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if systemctl is-active coturn; then
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systemctl --no-block restart coturn
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fi
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'';
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services.nginx.virtualHosts."${fqdn}" = {
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enableACME = true;
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forceSSL = true;
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};
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networking.firewall = {
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allowedTCPPorts = with cfg; [ listening-port alt-listening-port tls-listening-port alt-tls-listening-port ];
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allowedUDPPorts = with cfg; [ listening-port alt-listening-port tls-listening-port alt-tls-listening-port ];
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allowedUDPPortRanges = lib.singleton ports.coturn-relay.udp;
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};
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}
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