77 lines
2.4 KiB
Nix
77 lines
2.4 KiB
Nix
# TURN/STUN NAT traversal service
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# commonly used to establish realtime calls with prosody, or possibly matrix/synapse
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#
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# TODO: fix tel -> xmpp:
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# - "ERROR: check_stun_auth: Cannot find credentials of user <XXXMMMNNNN>"
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{ lib, ... }:
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let
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# TODO: this range could be larger, but right now that's costly because each element is its own UPnP forward
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# TURN port range (inclusive)
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turnPortLow = 49152;
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turnPortHigh = 49167;
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turnPortRange = lib.range turnPortLow turnPortHigh;
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in
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{
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sane.ports.ports = lib.mkMerge ([
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{
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"3478" = {
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# this is the "control" port.
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# i.e. no client data is forwarded through it, but it's where clients request tunnels.
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protocol = [ "tcp" "udp" ];
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visibleTo.lan = true;
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visibleTo.wan = true;
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description = "colin-stun-turn";
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};
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"5349" = {
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# the other port 3478 also supports TLS/DTLS, but presumably clients wanting TLS will default 5349
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protocol = [ "tcp" ];
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visibleTo.lan = true;
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visibleTo.wan = true;
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description = "colin-stun-turn-over-tls";
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};
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}
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] ++ (builtins.map
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(port: {
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"${builtins.toString port}" = let
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count = port - turnPortLow + 1;
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numPorts = turnPortHigh - turnPortLow + 1;
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in {
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protocol = [ "tcp" "udp" ];
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visibleTo.lan = true;
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visibleTo.wan = true;
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description = "colin-turn-${builtins.toString count}-of-${builtins.toString numPorts}";
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};
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})
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turnPortRange
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));
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services.nginx.virtualHosts."turn.uninsane.org" = {
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# allow ACME to procure a cert via nginx for this domain
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enableACME = true;
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};
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sane.dns.zones."uninsane.org".inet = {
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CNAME."turn" = "native";
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};
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sane.derived-secrets."/var/lib/coturn/shared_secret.bin" = {
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encoding = "base64";
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# TODO: make this not globally readable
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acl.mode = "0644";
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};
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# provide access to certs
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users.users.turnserver.extraGroups = [ "nginx" ];
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services.coturn.enable = true;
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services.coturn.realm = "turn.uninsane.org";
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services.coturn.cert = "/var/lib/acme/turn.uninsane.org/fullchain.pem";
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services.coturn.pkey = "/var/lib/acme/turn.uninsane.org/key.pem";
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services.coturn.use-auth-secret = true;
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services.coturn.static-auth-secret-file = "/var/lib/coturn/shared_secret.bin";
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services.coturn.min-port = turnPortLow;
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services.coturn.max-port = turnPortHigh;
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services.coturn.extraConfig = ''
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no-multicast-peers
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'';
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}
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