stormwind-nixfiles/networking.nix

{ config, ... }:

{
  networking = {
    hostName = "Stormwind";
    networkmanager.enable = false;


    firewall = {
      allowedTCPPorts = [ 80 443 8123 1883 8883 9001 20 21 22 2223 990 989 445 111 2049 32765 32768 20048 ];
      allowedUDPPorts = [ 111 2049 20048 32765 32768 ];
      trustedInterfaces = [ "incusbr0" ];
    };

    # here’s the custom nftables filter ruleset for forwarded traffic:
    nftables.ruleset = ''
      table ip filter {
        chain forward {
          type filter hook forward priority 0; policy drop;
          # allow established/related replies
          ct state established,related accept

          # allow new+established VM→Internet
          iifname "incusbr0" oifname "enp4s0" ct state new,established accept
          iifname "incusbr1" oifname "enp4s0" ct state new,established accept

          # allow natted replies
          iifname "enp4s0" oifname "incusbr0" tcp dport 8123 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" tcp dport 80 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" tcp dport 443 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" tcp dport 1883 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" tcp dport 8883 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" tcp dport 9001 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" tcp dport 20 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" tcp dport 21 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" tcp dport 22 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" tcp dport 2223 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" tcp dport 990 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" tcp dport 989 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" tcp dport 445 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" tcp dport 111 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" udp dport 111 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" tcp dport 2049 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" udp dport 2049 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" tcp dport 32765 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" udp dport 32765 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" tcp dport 32768 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" udp dport 32768 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" tcp dport 20048 ct state new,established accept
          iifname "enp4s0" oifname "incusbr0" udp dport 20048 ct state new,established accept
        }
      }
    '';

    bridges = {
      incusbr0 = {
        interfaces = [];
      };
      incusbr1 = {
        interfaces = [];
      };
    };

    interfaces = {
      incusbr0 = {
        ipv4.addresses = [
          { address = "10.46.32.1"; prefixLength = 24; }
        ];
      };
      incusbr1 = {
        ipv4.addresses = [
          { address = "10.46.33.1"; prefixLength = 24; }
        ];
      };
    };

    nat = {
      enable = true;
      internalInterfaces = [ "incusbr0" "incusbr1" ];
      externalInterface = "enp4s0";
      forwardPorts = [
        # Web-UI for home-assistant
        {
          sourcePort = 8123;
          proto = "tcp";
          destination = "10.46.32.153:8123";
        }
        # Web-UI for nas
        {
          sourcePort = 80;
          proto = "tcp";
          destination = "10.46.32.2:80";
        }
        {
          sourcePort = 443;
          proto = "tcp";
          destination = "10.46.32.2:443";
        }
        # MQTT
        {
          sourcePort = 1883;
          proto = "tcp";
          destination = "10.46.32.153:1883";
        }
        {
          sourcePort = 8883;
          proto = "tcp";
          destination = "10.46.32.153:8883";
        }
        {
          sourcePort = 9001;
          proto = "tcp";
          destination = "10.46.32.153:9001";
        }
        # FTP
        {
          sourcePort = 20;
          proto = "tcp";
          destination = "10.46.32.2:20";
        }
        {
          sourcePort = 21;
          proto = "tcp";
          destination = "10.46.32.2:21";
        }
        {
          sourcePort = 22;
          proto = "tcp";
          destination = "10.46.32.2:22";
        }
        {
          sourcePort = 2223;
          proto = "tcp";
          destination = "10.46.32.2:2223";
        }
        {
          sourcePort = 990;
          proto = "tcp";
          destination = "10.46.32.2:990";
        }
        {
          sourcePort = 989;
          proto = "tcp";
          destination = "10.46.32.2:989";
        }
        # SMB
        {
          sourcePort = 445;
          proto = "tcp";
          destination = "10.46.32.2:445";
        }
        # NFS
        {
          sourcePort = 111;
          proto = "tcp";
          destination = "10.46.32.2:111";
        }
        {
          sourcePort = 111;
          proto = "udp";
          destination = "10.46.32.2:111";
        }
        {
          sourcePort = 2049;
          proto = "tcp";
          destination = "10.46.32.2:2049";
        }
        {
          sourcePort = 2049;
          proto = "udp";
          destination = "10.46.32.2:2049";
        }
        {
          sourcePort = 32765;
          proto = "tcp";
          destination = "10.46.32.2:32765";
        }
        {
          sourcePort = 32765;
          proto = "udp";
          destination = "10.46.32.2:32765";
        }
        {
          sourcePort = 32768;
          proto = "tcp";
          destination = "10.46.32.2:32768";
        }
        {
          sourcePort = 32768;
          proto = "udp";
          destination = "10.46.32.2:32768";
        }
        {
          sourcePort = 20048;
          proto = "tcp";
          destination = "10.46.32.2:20048";
        }
        {
          sourcePort = 20048;
          proto = "udp";
          destination = "10.46.32.2:20048";
        }
      ];
    };
  };
}