dotfiles-nixos/nixos/machines/pc-mans/network.nix

# networking.nix

# Import the necessary modules
{ config, pkgs, ... }:

{
  # Set the network interface configuration
  # networking.interfaces.eth0.useDHCP = true;

  networking.networkmanager.enable = true;

  # Open ports in the firewall.
  networking.firewall.allowedTCPPorts = [ 22 ];
  networking.firewall.allowedUDPPorts = [ 51820 ];
  # Or disable the firewall altogether.
  # networking.firewall.enable = true;

  # Enable WireGuard
  networking.wireguard.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.
      ips = [ "10.100.0.2/24" ];
      listenPort = 51820; # to match firewall allowedUDPPorts (without this wg uses random port numbers)

      # 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 = "/etc/wireguard/private";

      peers = [
        {
          # Public key of the server (not a file path).
          publicKey = "Q6kxhwGhqOyaGyyO4lum83WpJqjsj71Ab4gvUau2zCI=";

          # Forward all the traffic via VPN.
          allowedIPs = [ "0.0.0.0/0" ];
          # Or forward only particular subnets
          #allowedIPs = [ "10.100.0.1" "91.108.12.0/22" ];

          # Set this to the server IP and port.
          endpoint = "192.168.2.11:51820"; # ToDo: route to endpoint not automatically configured https://wiki.archlinux.org/index.php/WireGuard#Loop_routing https://discourse.nixos.org/t/solved-minimal-firewall-setup-for-wireguard-client/7577

          # Send keepalives every 25 seconds. Important to keep NAT tables alive.
          persistentKeepalive = 25;
        }
      ];
    };
  };

  # Set the hostname
  networking.hostName = "pc-mans";
}