## On 2002-09-10 09:45 -0400 alex@yuriev.com typed:
Hi Eliot
Maybe I'm missing something obvious but do how you get rate-limiting per TCP *flow* with Cisco IOS ?
It is more trouble than its worth.
IMHO there are other problems beside SPAM that can use per flow shaping/rate-limiting
SPAM is not a technical problem. It is a social problem. Using technical methods is not going to solve the problem. In the end, every time we come up with another method of detecting and blocking spam, another method is bypassing this defense is going to show up.
How about using a combination of technical and "social" measures For example in a Cyber Cafe use passive technical measures to count the total number of outbound SMTP sessions and charge 1$ per Email over an average rate of 2 Emails/minute and 10$ per Email exceeding a rate of 10 per minute
Alex
-- Rafi