[vpn] init

machines/configuration.nix

@@ -123,7 +123,6 @@ in
     ];
   };
 
-
   durruti = nixosSystem {
     system = "x86_64-linux";
     specialArgs.inputs = inputs;
@@ -133,6 +132,16 @@ in
     ];
   };
 
+  vpn = nixosSystem {
+    system = "x86_64-linux";
+    specialArgs.inputs = inputs;
+    specialArgs.self = self;
+    modules = makeMicroVM "vpn" "10.0.0.10" [
+      self.nixosModules.malobeo
+      ./vpn/configuration.nix
+    ];
+  };
+
   lucia = nixosSystem {
     system = "aarch64-linux";
     specialArgs.inputs = inputs;

machines/vpn/configuration.nix

@@ -0,0 +1,28 @@
+{ config, lib, pkgs, inputs, ... }:
+
+with lib;
+
+{
+  #sops.defaultSopsFile = ./secrets.yaml;
+
+  networking = {
+    hostName = mkDefault "vpn";
+    useDHCP = false;
+    nameservers = [ "1.1.1.1" ];
+  };
+
+  imports = [
+    ../modules/malobeo_user.nix
+    ../modules/sshd.nix
+    ../modules/minimal_tools.nix
+  ];
+
+  services.malobeo.vpn = {
+    enable = true;
+    name = "vpn";
+    privateKey = "somepath";
+  };
+
+  system.stateVersion = "22.11"; # Did you read the comment?
+}
+

machines/vpn/wireguard.nix

@@ -0,0 +1,73 @@
+{config, pkgs, ...}:
+{
+  sops.secrets.wireguard_private = {};
+
+  # enable NAT
+  networking.nat.enable = true;
+  networking.nat.externalInterface = "eth0";
+  networking.nat.internalInterfaces = [ "wg0" ];
+  networking.firewall = {
+    allowedUDPPorts = [ 51820 ];
+  };
+
+
+  networking.wireguard.enable = true;
+  networking.wireguard.interfaces = {
+    # "wg0" is the network interface name. You can name the interface arbitrarily.
+    wg0 = {
+      # Determines the IP address and subnet of the server's end of the tunnel interface.
+      ips = [ "10.100.0.1/24" ];
+
+      # The port that WireGuard listens to. Must be accessible by the client.
+      listenPort = 51820;
+
+      # This allows the wireguard server to route your traffic to the internet and hence be like a VPN
+      # For this to work you have to set the dnsserver IP of your router (or dnsserver of choice) in your clients
+      postSetup = ''
+        ${pkgs.iptables}/bin/iptables -t nat -A POSTROUTING -s 10.100.0.0/24 -o eth0 -j MASQUERADE
+      '';
+
+      # This undoes the above command
+      postShutdown = ''
+        ${pkgs.iptables}/bin/iptables -t nat -D POSTROUTING -s 10.100.0.0/24 -o eth0 -j MASQUERADE
+      '';
+
+      # Path to the private key file.
+      #
+      # Note: The private key can also be included inline via the privateKey option,
+      # but this makes the private key world-readable; thus, using privateKeyFile is
+      # recommended.
+      privateKey = config.sops.secrets.wireguard_private.path;
+
+      peers = [
+        # List of allowed peers.
+        { # Feel free to give a meaningfull name
+          # Public key of the peer (not a file path).
+          publicKey = "SfokXbgmvSmodgPFoVHjwmHE3nriQ3OTQ+hISU/3eW4=";
+
+          # List of IPs assigned to this peer within the tunnel subnet. Used to configure routing.
+          allowedIPs = [ "10.100.0.2/32" ];
+
+        }
+      ];
+    };
+  };
+
+  #sops.secrets.wireguard_host = {};
+  #sops.secrets.mullvad_secret = {};
+
+  #networking.wg-quick.interfaces = {
+  #  wg0 = {
+  #    address = [ "50.100.0.2/24" ];
+  #    privateKeyFile = "/home/kalipso/.config/wireguard-keys/private";
+
+  #    peers = [
+  #      {
+  #        publicKey = "Anme1N482rGSZ14wqtZQbzUHvX4oFhoVct0d187H0iM=";
+  #        allowedIPs = [ "50.100.0.0/24" ];
+  #        endpoint = "5.9.153.217:51820";
+  #      }
+  #    ];
+  #  };
+
+}