{
  pkgs,
  lib,
  config,
  ...
}: let
  keys = import ../../../variables/keys.nix;
  passwords = import ../../../variables/passwords.crypt.nix;
in {
  # TASK: new device
  networking.hostName = "fwhost1"; # Define your hostname.

  networking.useDHCP = false;

  networking.firewall.enable = lib.mkForce false;
  networking.firewall.allowedTCPPorts = [
    # iperf3
    5201
  ];

  networking.firewall.logRefusedConnections = false;
  networking.usePredictableInterfaceNames = false;

  networking.bridges.breth.interfaces = ["eth0" "eth1"];
  networking.bridges.breth.rstp = true;

  networking.defaultGateway.address = "172.172.171.10";
  networking.nameservers = ["172.172.171.10"];

  # WAN interfaces, currently unused because the OPNsense guest acts as a router.
  networking.vlans.wan1.id = 3;
  networking.vlans.wan1.interface = "breth";
  networking.interfaces.wan1.ipv4.addresses = [
    {
      address = "192.168.0.15";
      prefixLength = 24;
    }
  ];

  networking.vlans.wan2.id = 4;
  networking.vlans.wan2.interface = "breth";
  networking.interfaces.wan2.ipv4.addresses = [
    {
      address = "172.16.0.15";
      prefixLength = 12;
    }
  ];

  # Local interfaces, all accessed via VLAN tags on the main bridge
  networking.vlans.lan.id = 1;
  networking.vlans.lan.interface = "breth";
  networking.interfaces.lan.ipv4.addresses = [
    {
      address = "172.172.171.15";
      prefixLength = 24;
    }
  ];

  networking.vlans.dmz.id = 5;
  networking.vlans.dmz.interface = "breth";

  networking.vlans.family.id = 6;
  networking.vlans.family.interface = "breth";

  networking.vlans.guests.id = 7;
  networking.vlans.guests.interface = "breth";

  services.hostapd = {
    enable = false;
    hwMode = "g";
    interface = "wlan0";
    ssid = "noowhere-lan";
    wpaPassphrase = passwords.wifi.noowhere-lan;
    extraConfig = ''
      bridge=breth
    '';
  };

  virtualisation = {
    libvirtd = {
      onShutdown = "shutdown";
      enable = true;
    };
  };

  boot.kernelPackages = lib.mkForce pkgs.linuxPackages_latest;
}