nixos-conf/machine-confs/wg-rpi-configuration.nix

{ config, pkgs, lib, ... }:
let
        SSID = "ENTER_SSID";
        SSIDpassword = "ENTER_PASSWORD";
        interface = "wlan0";
        wg_interface = "end0";
        hostname = "netflix-huijaus";
        ssh-authorizedKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBbGREoK1uVny1s8FK3KZ74Wmaf0VtifhqPyK69C/Gez vili@helium";
		  ddPassFile = "/root/wg-conf/ddPassFile";
in {

environment.systemPackages = with pkgs; [ vim wireguard-tools qrencode ];

  # enable NAT
  networking.nat.enable = true;
  networking.nat.externalInterface = wg_interface;
  networking.nat.internalInterfaces = [ "wg0" ];
  networking.firewall = {
    allowedUDPPorts = [ 51821 ];
  };

  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 = 51821;

      # 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 ${wg_interface} -j MASQUERADE
      '';

		# This undoes the above command
		postShutdown = ''
${pkgs.iptables}/bin/iptables -t nat -D POSTROUTING -s 10.100.0.0/24 -o ${wg_interface} -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.
      privateKeyFile = "/root/wg-conf/private";

      peers = [
        { # Vili Android
          publicKey = "niKpC3+Pi4HrYITlzROzqRcxzfzRw1rjpxeJVOr/WAw=";
          allowedIPs = [ "10.100.0.2/32" ];
        }
        { # Miika Puhelin
          publicKey = "mcOs94W9jqn3SGgc8uWbnmUv0tja/P6tAvaCg3WYKlY=";
          allowedIPs = [ "10.100.0.3/32" ];
        }
        { # Miika Kone
          publicKey = "7m7wnwNlmxZfUNvUOYNh4mTNbOsig7z2K/svUhDHFDY=";
          allowedIPs = [ "10.100.0.4/32" ];
        }
        { # Silja Puhelin
          publicKey = "f6wWd6KD63xwnKkre/ZgZxPJv9GfAXK9Zx/EQEq8cik=";
          allowedIPs = [ "10.100.0.5/32" ];
        }
        { # Silja Kone
          publicKey = "t9cmHc6/+0njdzsTFnnhEGKfhCa2VXFrTH9hF1jOCXw=";
          allowedIPs = [ "10.100.0.6/32" ];
        }
        { # Vili helium
          publicKey = "iGO375NT9EK5LH+E9vjPRRJp+UM4rZ2d1RMVR3f5R0c=";
          allowedIPs = [ "10.100.0.7/32" ];
        }
      ];
    };
  };

services.ddclient = {
	enable = true;
	domains = [ "netflood.ddnsfree.com" ];
	use = "web, web=checkip.dynu.com/, web-skip='IP Address'";
	server = "api.dynu.com";
	username = "VSinerva";
	passwordFile = ddPassFile;
};
#################### EVERYTHING BELOW THIS SHOULD NOT NEED TO CHANGE ####################

        boot = {
                kernelPackages = pkgs.linuxKernel.packages.linux_rpi4;
                initrd.availableKernelModules = [ "xhci_pci" "usbhid" "usb_storage" ];
                loader = {
                        grub.enable = false;
                        generic-extlinux-compatible.enable = true;
                };
        };

        fileSystems = {
                "/" = {
                        device = "/dev/disk/by-label/NIXOS_SD";
                        fsType = "ext4";
                        options = [ "noatime" ];
                };
        };

        networking = {
                hostName = hostname;
                wireless = {
                        enable = false;
                        networks."${SSID}".psk = SSIDpassword;
                        interfaces = [ interface ];
                };
        };

#################### SSH configuration ####################
        services.openssh.enable = true;
        services.openssh.settings.PasswordAuthentication = false;
        users.users.root.openssh.authorizedKeys.keys = [ ssh-authorizedKey ];

#################### BASE ####################
        users.mutableUsers = false;
        users.users.root.hashedPassword = "!";

        nixpkgs.config.allowUnfree = true;

# Select internationalisation properties.
        i18n.defaultLocale = "en_US.UTF-8";
        services.xserver.layout = "us,";
        services.xserver.xkbVariant = "de_se_fi,";
        console = pkgs.lib.mkForce {
                font = "Lat2-Terminus16";
                useXkbConfig = true; # use xkbOptions in tty.
        };
        time.timeZone = "Europe/Helsinki";

#################### Housekeeping ####################
        system.autoUpgrade.enable = true;
        nix.gc.automatic = true;
        nix.gc.options = "--delete-older-than 7d";
        nix.gc.dates = "weekly";

# Copy the NixOS configuration file and link it from the resulting system
# (/run/current-system/configuration.nix). This is useful in case you
# accidentally delete configuration.nix.
        system.copySystemConfiguration = true;

        hardware.enableRedistributableFirmware = true;
        system.stateVersion = "23.11";
}