89 lines
2.7 KiB
Nix
89 lines
2.7 KiB
Nix
{ config, lib, pkgs, ... }:
|
|
|
|
let
|
|
cfg = config.local.services.vpn.wireguard;
|
|
|
|
addrsViaDefaultInterface = [
|
|
# cache.nixos.org
|
|
"151.101.86.217/32"
|
|
];
|
|
in
|
|
{
|
|
options.local.services.vpn.wireguard = with lib; {
|
|
enable = mkEnableOption "Enable wireguard vpn";
|
|
ip = mkOption {
|
|
type = types.str;
|
|
example = "10.100.0.1/24";
|
|
};
|
|
privateKeyFile = mkOption {
|
|
type = types.str;
|
|
};
|
|
server = {
|
|
addr = mkOption {
|
|
type = types.str;
|
|
};
|
|
port = mkOption {
|
|
type = types.int;
|
|
};
|
|
publicKey = mkOption {
|
|
type = types.str;
|
|
};
|
|
};
|
|
};
|
|
|
|
config = lib.mkIf cfg.enable {
|
|
networking.firewall = {
|
|
allowedUDPPorts = [ cfg.server.port ]; # Clients and peers can use the same port, see listenport
|
|
};
|
|
# Enable WireGuard
|
|
networking.wg-quick.interfaces = {
|
|
# "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.
|
|
address = [ cfg.ip ];
|
|
dns = [ "10.20.30.1" ];
|
|
|
|
listenPort = cfg.server.port; # to match firewall allowedUDPPorts (without this wg uses random port numbers)
|
|
|
|
# Path to the private key file.
|
|
privateKeyFile = cfg.privateKeyFile;
|
|
|
|
postUp = ''
|
|
addr=`${pkgs.iproute}/bin/ip route | ${pkgs.gawk}/bin/awk '/default/ {print $3; exit}'`
|
|
interface=`${pkgs.iproute}/bin/ip route | ${pkgs.gawk}/bin/awk '/default/ {print $5; exit}'`
|
|
'' + lib.concatLines (map
|
|
(addr: "${pkgs.iproute}/bin/ip route add ${addr} via $addr dev $interface")
|
|
addrsViaDefaultInterface
|
|
);
|
|
|
|
preDown = ''
|
|
addr=`${pkgs.iproute}/bin/ip route | ${pkgs.gawk}/bin/awk '/default/ {print $3; exit}'`
|
|
interface=`${pkgs.iproute}/bin/ip route | ${pkgs.gawk}/bin/awk '/default/ {print $5; exit}'`
|
|
'' + lib.concatLines (map
|
|
(addr: "${pkgs.iproute}/bin/ip route del ${addr} via $addr dev $interface")
|
|
addrsViaDefaultInterface
|
|
);
|
|
|
|
peers = [
|
|
# For a client configuration, one peer entry for the server will suffice.
|
|
|
|
{
|
|
# Public key of the server (not a file path).
|
|
publicKey = cfg.server.publicKey;
|
|
|
|
# Forward all the traffic via VPN.
|
|
allowedIPs = [ "0.0.0.0/0" ];
|
|
# Or forward only particular subnets
|
|
# allowedIPs = [ "192.168.0.0/24" ];
|
|
|
|
# Set this to the server IP and port.
|
|
endpoint = "${cfg.server.addr}:${toString cfg.server.port}";
|
|
|
|
# Send keepalives every 25 seconds. Important to keep NAT tables alive.
|
|
persistentKeepalive = 15;
|
|
}
|
|
];
|
|
};
|
|
};
|
|
};
|
|
}
|