table ip wg0 {
  chain preraw {
    type filter hook prerouting priority raw; policy accept;
    iifname != "wg0" ip daddr 10.55.127.342 fib saddr type != local drop;
  }

  chain premangle {
    type filter hook prerouting priority mangle; policy accept;
    meta l4proto udp meta mark set ct mark;
  }

  chain postmangle {
    type filter hook postrouting priority mangle; policy accept;
    meta l4proto udp meta mark 0xa22a61a9 ct mark set meta mark;
  }
}

table ip6 wg0 {
  chain preraw {
    type filter hook prerouting priority raw; policy accept;
    iifname != "wg0" ip6 daddr ab00:aaaa:aaa:aa02::5:abcd fib saddr type != local drop;
  }

  chain premangle {
    type filter hook prerouting priority mangle; policy accept;
    meta l4proto udp meta mark set ct mark;
  }

  chain postmangle {
    type filter hook postrouting priority mangle; policy accept;
    meta l4proto udp meta mark 0xa22a61a9 ct mark set meta mark;
  }
}