60 lines
2.1 KiB
Nix
60 lines
2.1 KiB
Nix
{ pkgs, lib, config, ... }:
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{
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options.wireguard = {
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enable = lib.mkEnableOption "wireguard";
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port = lib.mkOption {
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default = 51820;
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description = "The port for wireguard to use.";
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type = lib.types.int;
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};
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externalInterface = lib.mkOption {
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description = "The external networking interface for wireguard to use.";
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type = lib.types.str;
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};
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internalInterface = lib.mkOption {
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default = "wg0";
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description = "The networking interface for wireguard to use.";
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type = lib.types.str;
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};
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privateKeyFile = lib.mkOption {
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description = "The path to the private key of the wireguard server.";
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type = lib.types.path;
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};
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};
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config = lib.mkIf config.wireguard.enable {
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networking.nat.enable = true;
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networking.nat.externalInterface = config.wireguard.externalInterface;
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networking.nat.internalInterfaces = [ config.wireguard.internalInterface ];
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networking.firewall.allowedUDPPorts = [ config.wireguard.port ];
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networking.wireguard.interfaces = {
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${config.wireguard.internalInterface} = {
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# Determines the IP address and subnet of the server's end of the tunnel interface.
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ips = [ "10.100.0.1/24" ];
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listenPort = config.wireguard.port;
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# This allows the wireguard server to route your traffic to the internet and hence be like a VPN
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# For this to work you have to set the dnsserver IP of your router (or dnsserver of choice) in your clients
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postSetup = ''
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${pkgs.iptables}/bin/iptables -t nat -A POSTROUTING -s 10.100.0.0/24 -o eth0 -j MASQUERADE
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'';
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# This undoes the above command
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postShutdown = ''
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${pkgs.iptables}/bin/iptables -t nat -D POSTROUTING -s 10.100.0.0/24 -o eth0 -j MASQUERADE
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'';
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# Path to the servers private key file.
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privateKeyFile = config.wireguard.privateKeyFile;
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# TODO: add config option?
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peers = [
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{
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publicKey = "L+NlTn0E9pgCoEoTYs4aDewZSMmyeyC1Os9DCdwYTjY=";
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allowedIPs = [ "10.100.0.2/32" ];
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}
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];
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};
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};
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};
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}
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