102 lines
2.9 KiB
Nix
102 lines
2.9 KiB
Nix
{ config, self, lib, inputs, options, pkgs, ... }:
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with lib;
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let
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cfg = config.services.malobeo.vpn;
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peers = import ./peers.nix;
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myPeer = if cfg.name == "" then peers.${config.networking.hostName} else peers.${cfg.name};
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peerList = builtins.filter (peer: peer.role != myPeer.role) (builtins.attrValues peers);
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peerListWithEndpoint = map (host:
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if host.role == "server" then
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host // { endpoint = "${host.publicIp}:${builtins.toString host.listenPort}"; }
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else
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host
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) peerList;
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filteredPeerlist = map (host: builtins.removeAttrs host [
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"role"
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"address"
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"listenPort"
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"publicIp"
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] ) peerListWithEndpoint;
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in
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{
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options = {
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services.malobeo.vpn = {
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enable = mkOption {
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default = false;
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type = types.bool;
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description = lib.mdDoc "Setup wireguard to access malobeo maintainance vpn";
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};
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autostart = mkOption {
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default = true;
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type = types.bool;
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description = lib.mdDoc "whether to autostart vpn interface on boot";
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};
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name = mkOption {
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default = "";
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type = types.str;
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description = ''
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Name of the host in peers.nix, if empty uses hostname
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'';
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};
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privateKeyFile = mkOption {
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default = "";
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type = types.str;
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description = ''
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Path to private key
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'';
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};
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};
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};
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config = mkIf cfg.enable {
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assertions = [
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{
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assertion = !(myPeer.role != "client" && myPeer.role != "server");
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message = ''
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VPN Role must be either client or server, nothing else!
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'';
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}
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];
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boot.kernel.sysctl."net.ipv4.ip_forward" = mkIf (myPeer.role == "server") 1;
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networking.wg-quick = {
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interfaces = {
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malovpn = {
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mtu = 1340; #seems to be necessary to proxypass nginx traffic through vpn
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address = [ "${myPeer.address}/24" ];
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autostart = cfg.autostart;
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listenPort = mkIf (myPeer.role == "server") myPeer.listenPort;
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# This allows the wireguard server to route your traffic to the internet and hence be like a VPN
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# For this to work you have to set the dnsserver IP of your router (or dnsserver of choice) in your clients
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postUp = mkIf (myPeer.role == "server") ''
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${pkgs.iptables}/bin/iptables -t nat -A POSTROUTING -s 10.100.0.0/24 -o enp0s3 -j MASQUERADE
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'';
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# This undoes the above command
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postDown = mkIf (myPeer.role == "server") ''
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${pkgs.iptables}/bin/iptables -t nat -D POSTROUTING -s 10.100.0.0/24 -o enp0s3 -j MASQUERADE
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'';
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privateKeyFile = cfg.privateKeyFile;
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peers = filteredPeerlist;
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};
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};
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};
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#networking.nat = mkIf (myPeer.role == "server"){
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# enable = true;
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# internalInterfaces = [ "microvm" ];
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# externalInterface = "eth0"; #change to your interface name
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#};
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};
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}
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