SMURF amplifier block list

Stephen Sprunk writes:

If you have a suggestion for "removing the attack possibility in its
entirety," please tell us. So far, nobody's come up with one.

SMURF'ing depends on spoofed source addresses, so the appropriate
filter is customer (and if your can afford it peer) ingress, not
network egress.

Anyone willing to install a *.255 filter should instead eliminate
directed-broadcast response, and validate packets they will accept.