Huh? How would that work? You have no idea what my port knocking scheme is.

For all you know you have to knock ports 22, 46, 1776, and 8998 to the timing of "shave and a haircut" switching between udp and icmp along the way... Good luck, the entropy you have to overcome is astronomical.

I would thing that blocking IP's of insessant knockers would be easy to implement.