As a follow-up to this, I experimented with dropping any packet that does not have the exact MSS of 1460. Nearly all spam bots and crawlers are gone but I woul

As a follow-up to this, I experimented with dropping any packet that does not have the exact MSS of 1460. Nearly all spam bots and crawlers are gone but I would expect that some people using VPN's would also be blocked. Oddly enough most of the bots in Asia are exactly 1398 and most of the bots in Russia are 1424. I find that interesting.