system/modules/nixos/services/vpn/wireguard/client.nix

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{ config, lib, ... }:
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let
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cfg = config.local.services.vpn.wireguard;
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in
{
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options.local.services.vpn.wireguard = with lib; {
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enable = mkEnableOption "Enable wireguard vpn";
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ip = mkOption {
type = types.str;
example = "10.100.0.1/24";
};
privateKeyFile = mkOption {
type = types.str;
};
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server = {
addr = mkOption {
type = types.str;
};
port = mkOption {
type = types.int;
};
publicKey = mkOption {
type = types.str;
};
};
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};
config = lib.mkIf cfg.enable {
networking.firewall = {
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allowedUDPPorts = [ cfg.server.port ]; # Clients and peers can use the same port, see listenport
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};
# Enable WireGuard
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networking.wg-quick.interfaces = {
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# "wg0" is the network interface name. You can name the interface arbitrarily.
wg0 = {
# Determines the IP address and subnet of the client's end of the tunnel interface.
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address = [ cfg.ip ];
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dns = [ "10.20.30.1" ];
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listenPort = cfg.server.port; # to match firewall allowedUDPPorts (without this wg uses random port numbers)
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# Path to the private key file.
privateKeyFile = cfg.privateKeyFile;
peers = [
# For a client configuration, one peer entry for the server will suffice.
{
# Public key of the server (not a file path).
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publicKey = cfg.server.publicKey;
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# Forward all the traffic via VPN.
allowedIPs = [ "0.0.0.0/0" ];
# Or forward only particular subnets
# allowedIPs = [ "192.168.0.0/24" ];
# Set this to the server IP and port.
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endpoint = "${cfg.server.addr}:${toString cfg.server.port}";
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# Send keepalives every 25 seconds. Important to keep NAT tables alive.
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persistentKeepalive = 15;
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}
];
};
};
};
}