copnix/nixos/networking/vpn/default.nix

{ config, pkgs, ... }:

{
  services.cloudflare-warp.enable = false;

  services.zapret = {
    enable = false;
    params = [
      "--filter-tcp=80"
      "--dpi-desync=fake,multisplit"
      "--dpi-desync-split-pos=method+2"
      "--dpi-desync-fooling=md5sig"
      "--new"
      "--filter-tcp=443"
      "--dpi-desync=fake,multidisorder"
      "--dpi-desync-split-pos=1,midsld"
      "--dpi-desync-fooling=badseq,md5sig"
      "--new"
      "--filter-udp=443"
      "--dpi-desync=fake"
      "--dpi-desync-repeats=6"
    ];
  };

  networking.enableIPv6 = false;

  networking.firewall.extraCommands = ''
    iptables -I OUTPUT -p tcp -m multiport --dports 80,443 -m connbytes --connbytes-dir=original --connbytes-mode=packets --connbytes 1:9 -j NFQUEUE --queue-num 200 --queue-bypass
    iptables -I OUTPUT -p udp --dport 443 -m connbytes --connbytes-dir=original --connbytes-mode=packets --connbytes 1:9 -j NFQUEUE --queue-num 200 --queue-bypass
    iptables -I OUTPUT -m mark --mark 0x40000000/0x40000000 -j RETURN
  '';

  networking.firewall.extraStopCommands = ''
    iptables -D OUTPUT -p tcp -m multiport --dports 80,443 -m connbytes --connbytes-dir=original --connbytes-mode=packets --connbytes 1:9 -j NFQUEUE --queue-num 200 --queue-bypass || true
    iptables -D OUTPUT -p udp --dport 443 -m connbytes --connbytes-dir=original --connbytes-mode=packets --connbytes 1:9 -j NFQUEUE --queue-num 200 --queue-bypass || true
    iptables -D OUTPUT -m mark --mark 0x40000000/0x40000000 -j RETURN || true
  '';
}