SMURF amplifier block list

All outgoing pkts to now should go to Null0. I am sure
one can improve on the logic even more.

Exactly. All OUTGOING packets. Not Incoming. Not the smurf attack
packets which are swamping your downstream customer, which have a source
address from

My textual mistake - this snippet is to send pkts to dev/null for all pkts
*sourced* from -Hank