nix/nixos/hosts/frankfurt-linode-01/firewall.nix

{ pkgs, ... }: {
  networking = {
    firewall = {
      enable = true;
      allowedTCPPorts = [
        80    # HTTP
        443   # HTTPS
        42420 # Vintage Story
        25565 # Minecraft
        1443  # Headscale DERP (tcp)
        25    # Mailserver
        143   # Mailserver
        465   # Mailserver
        587   # Mailserver
        993   # Mailserver
        4190  # Mailserver
        4443  # Jitsi
      ];
      allowedUDPPorts = [
        3478  # Headscale DERP (udp)
        10000 # Jitsi Meet (udp)
        15636 # Enshrouded - Game
        15637 # Enshrouded - Query Port
      ];
    };

    nftables = {
      enable = true;
      ruleset = ''
          table ip nat {
            chain PREROUTING {
              type nat hook prerouting priority dstnat; policy accept;
              iifname "enp0s4" udp dport 10000 dnat to 10.100.0.2:10000;
              iifname "enp0s4" udp dport 15636 dnat to 10.100.1.2:15636;
              iifname "enp0s4" udp dport 15637 dnat to 10.100.1.2:15637;
            }
          }
      '';
    };

    nat = {
      enable = true;
      internalInterfaces = [ "enp0s4" ];
      externalInterface = "wireguard0";
      forwardPorts =  [
        { sourcePort = 10000; proto = "udp"; destination = "10.100.0.2:10000"; }
        { sourcePort = 15636; proto = "udp"; destination = "10.100.1.2:15636"; }
        { sourcePort = 15637; proto = "udp"; destination = "10.100.1.2:15637"; }
      ];
    };
  };

  environment.systemPackages = [ pkgs.cacert ];
  
  environment.etc."haproxy-blocked-ips" = ''
    # https://openai.com/searchbot.json
    20.42.10.176/28
    172.203.190.128/28
    51.8.102.0/24

    # https://openai.com/chatgpt-user.json
    23.98.142.176/28 
    40.84.180.224/28 
    13.65.240.240/28 
    20.97.189.96/28 
    20.161.75.208/28 
    52.225.75.208/28 
    52.156.77.144/28 
    40.84.221.208/28 
    40.84.221.224/28 
    40.84.180.64/28 
    23.98.179.16/28 

    # https://openai.com/gptbot.json
    52.230.152.0/24 
    52.233.106.0/24 
    20.171.206.0/24 

    # https://developers.google.com/search/apis/ipranges/googlebot.json
    2001:4860:4801:10::/64
    2001:4860:4801:11::/64
    2001:4860:4801:12::/64
    2001:4860:4801:13::/64
    2001:4860:4801:14::/64
    2001:4860:4801:15::/64
    2001:4860:4801:16::/64
    2001:4860:4801:17::/64
    2001:4860:4801:18::/64
    2001:4860:4801:19::/64
    2001:4860:4801:1a::/64
    2001:4860:4801:1b::/64
    2001:4860:4801:1c::/64
    2001:4860:4801:1d::/64
    2001:4860:4801:1e::/64
    2001:4860:4801:1f::/64
    2001:4860:4801:20::/64
    2001:4860:4801:21::/64
    2001:4860:4801:22::/64
    2001:4860:4801:23::/64
    2001:4860:4801:24::/64
    2001:4860:4801:25::/64
    2001:4860:4801:26::/64
    2001:4860:4801:27::/64
    2001:4860:4801:28::/64
    2001:4860:4801:29::/64
    2001:4860:4801:2::/64
    2001:4860:4801:2a::/64
    2001:4860:4801:2b::/64
    2001:4860:4801:2c::/64
    2001:4860:4801:2d::/64
    2001:4860:4801:2e::/64
    2001:4860:4801:2f::/64
    2001:4860:4801:31::/64
    2001:4860:4801:32::/64
    2001:4860:4801:33::/64
    2001:4860:4801:34::/64
    2001:4860:4801:35::/64
    2001:4860:4801:36::/64
    2001:4860:4801:37::/64
    2001:4860:4801:38::/64
    2001:4860:4801:39::/64
    2001:4860:4801:3a::/64
    2001:4860:4801:3b::/64
    2001:4860:4801:3c::/64
    2001:4860:4801:3d::/64
    2001:4860:4801:3e::/64
    2001:4860:4801:40::/64
    2001:4860:4801:41::/64
    2001:4860:4801:42::/64
    2001:4860:4801:43::/64
    2001:4860:4801:44::/64
    2001:4860:4801:45::/64
    2001:4860:4801:46::/64
    2001:4860:4801:47::/64
    2001:4860:4801:48::/64
    2001:4860:4801:49::/64
    2001:4860:4801:4a::/64
    2001:4860:4801:50::/64
    2001:4860:4801:51::/64
    2001:4860:4801:53::/64
    2001:4860:4801:54::/64
    2001:4860:4801:55::/64
    2001:4860:4801:60::/64
    2001:4860:4801:61::/64
    2001:4860:4801:62::/64
    2001:4860:4801:63::/64
    2001:4860:4801:64::/64
    2001:4860:4801:65::/64
    2001:4860:4801:66::/64
    2001:4860:4801:67::/64
    2001:4860:4801:68::/64
    2001:4860:4801:69::/64
    2001:4860:4801:6a::/64
    2001:4860:4801:6b::/64
    2001:4860:4801:6c::/64
    2001:4860:4801:6d::/64
    2001:4860:4801:6e::/64
    2001:4860:4801:6f::/64
    2001:4860:4801:70::/64
    2001:4860:4801:71::/64
    2001:4860:4801:72::/64
    2001:4860:4801:73::/64
    2001:4860:4801:74::/64
    2001:4860:4801:75::/64
    2001:4860:4801:76::/64
    2001:4860:4801:77::/64
    2001:4860:4801:78::/64
    2001:4860:4801:79::/64
    2001:4860:4801:80::/64
    2001:4860:4801:81::/64
    2001:4860:4801:82::/64
    2001:4860:4801:83::/64
    2001:4860:4801:84::/64
    2001:4860:4801:85::/64
    2001:4860:4801:86::/64
    2001:4860:4801:87::/64
    2001:4860:4801:88::/64
    2001:4860:4801:90::/64
    2001:4860:4801:91::/64
    2001:4860:4801:92::/64
    2001:4860:4801:93::/64
    2001:4860:4801:c::/64
    2001:4860:4801:f::/64
    192.178.5.0/27
    192.178.6.0/27
    34.100.182.96/28
    34.101.50.144/28
    34.118.254.0/28
    34.118.66.0/28
    34.126.178.96/28
    34.146.150.144/28
    34.147.110.144/28
    34.151.74.144/28
    34.152.50.64/28
    34.154.114.144/28
    34.155.98.32/28
    34.165.18.176/28
    34.175.160.64/28
    34.176.130.16/28
    34.22.85.0/27
    34.64.82.64/28
    34.65.242.112/28
    34.80.50.80/28
    34.88.194.0/28
    34.89.10.80/28
    34.89.198.80/28
    34.96.162.48/28
    35.247.243.240/28
    66.249.64.0/27
    66.249.64.128/27
    66.249.64.160/27
    66.249.64.224/27
    66.249.64.32/27
    66.249.64.64/27
    66.249.64.96/27
    66.249.65.0/27
    66.249.65.160/27
    66.249.65.192/27
    66.249.65.224/27
    66.249.65.32/27
    66.249.65.64/27
    66.249.65.96/27
    66.249.66.0/27
    66.249.66.160/27
    66.249.66.192/27
    66.249.66.32/27
    66.249.66.64/27
    66.249.66.96/27
    66.249.68.0/27
    66.249.68.32/27
    66.249.68.64/27
    66.249.69.0/27
    66.249.69.128/27
    66.249.69.160/27
    66.249.69.192/27
    66.249.69.224/27
    66.249.69.32/27
    66.249.69.64/27
    66.249.69.96/27
    66.249.70.0/27
    66.249.70.128/27
    66.249.70.160/27
    66.249.70.192/27
    66.249.70.224/27
    66.249.70.32/27
    66.249.70.64/27
    66.249.70.96/27
    66.249.71.0/27
    66.249.71.128/27
    66.249.71.160/27
    66.249.71.192/27
    66.249.71.224/27
    66.249.71.32/27
    66.249.71.64/27
    66.249.71.96/27
    66.249.72.0/27
    66.249.72.128/27
    66.249.72.160/27
    66.249.72.192/27
    66.249.72.224/27
    66.249.72.32/27
    66.249.72.64/27
    66.249.72.96/27
    66.249.73.0/27
    66.249.73.128/27
    66.249.73.160/27
    66.249.73.192/27
    66.249.73.224/27
    66.249.73.32/27
    66.249.73.64/27
    66.249.73.96/27
    66.249.74.0/27
    66.249.74.128/27
    66.249.74.32/27
    66.249.74.64/27
    66.249.74.96/27
    66.249.75.0/27
    66.249.75.128/27
    66.249.75.160/27
    66.249.75.192/27
    66.249.75.224/27
    66.249.75.32/27
    66.249.75.64/27
    66.249.75.96/27
    66.249.76.0/27
    66.249.76.128/27
    66.249.76.160/27
    66.249.76.192/27
    66.249.76.224/27
    66.249.76.32/27
    66.249.76.64/27
    66.249.76.96/27
    66.249.77.0/27
    66.249.77.128/27
    66.249.77.160/27
    66.249.77.192/27
    66.249.77.224/27
    66.249.77.32/27
    66.249.77.64/27
    66.249.77.96/27
    66.249.78.0/27
    66.249.78.32/27
    66.249.79.0/27
    66.249.79.128/27
    66.249.79.160/27
    66.249.79.192/27
    66.249.79.224/27
    66.249.79.32/27
    66.249.79.64/27
    66.249.79.96/27

  '';

  services.haproxy = {
    enable = true;
    config = ''
      defaults
        timeout connect 10s
        timeout client 30s
        timeout server 30s 
        maxconn 3000 
        log global

      frontend http
        mode http
        bind :80
        bind :443 ssl crt /Storage/Data/Docker/sysctl.io/letsencrypt/external/*.sysctl.io/combined.pem

        acl is-blocked-ip src -f /etc/haproxy-blocked-ips
        http-request deny if is-blocked-ip

        http-request redirect scheme https unless { ssl_fc }
        default_backend backend_http
      backend backend_http
        mode http
        option forwardfor
        option forwarded
        server warsaw-ovh-01 10.100.0.2:443 ssl verify required ca-file ${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt sni req.hdr(Host)

      frontend vintage-story
        mode tcp 
        bind :42420
        default_backend backend_tcp 
      backend backend_tcp
        mode tcp
        server vintage-story-wg 10.100.1.5

      frontend tcp
        mode tcp
        bind :25565 
        bind :4443  
        default_backend backend_tcp 
      backend backend_tcp
        mode tcp
        server warsaw-ovh-01 10.100.0.2

      frontend mail 
        mode tcp
        bind :25
        bind :143
        bind :465
        bind :587
        bind :993
        bind :4190
        default_backend backend_mail 
      backend backend_mail
        mode tcp 
        server mailserver-wg 10.100.1.3
    '';
  };
}