103 lines
3.2 KiB
Nix
103 lines
3.2 KiB
Nix
# SPDX-FileCopyrightText: 2021-2022 Simon Bruder <simon@sbruder.de>
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#
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# SPDX-License-Identifier: AGPL-3.0-or-later
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{ config, lib, pkgs, ... }:
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let
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cfg = config.services.coturn;
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fqdn = "turn.sbruder.de";
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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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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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cert = "/run/turnserver/fullchain.pem";
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pkey = "/run/turnserver/key.pem";
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min-port = 49160;
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max-port = 49200;
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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-${fqdn}.target" ];
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serviceConfig = {
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ExecStartPre = lib.singleton "!${pkgs.writeShellScript "coturn-setup-tls" ''
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cp ${config.security.acme.certs."${fqdn}".directory}/{fullchain,key}.pem /run/turnserver/
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chgrp turnserver /run/turnserver/{fullchain,key}.pem
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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 ];
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allowedUDPPorts = with cfg; [ listening-port alt-listening-port tls-listening-port ];
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allowedUDPPortRanges = lib.singleton {
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from = cfg.min-port;
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to = cfg.min-port;
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};
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};
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}
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