  (outbound and
   udp.DstPort >= 20000 and udp.DstPort <= 65535 and
   udp.PayloadLength>=20 and
   udp.Payload[0] != 0x64)
  or
  (inbound and
   udp.SrcPort >= 20000 and udp.SrcPort <= 65535 and
   udp.PayloadLength>=20 and
   udp.Payload[0] != 0x64)
