Cloud service [was: RE: EC2 and GAE means end of ip address reputation industry? (Re: Intrustion attempts from Amazon EC2 IPs)]

Ken Simpson ksimpson at
Tue Jun 24 13:37:34 UTC 2008

> Source IP blocking makes up a large portion of today's spam arrest  
> approach,
> so we shouldn't discount the CPU benefits of that approach too  
> quickly.
> I'm not sure where today's technology is in regards for caching the  
> first 1
> to 10kB of a session....once enough information is garnered to  
> block, issue
> TCP RSETs.  If it's good, free the contents of the cache.

What's your interest in mopping up spam in the middle of the network?  
Usually spam is viewed as a leaf-node problem (much to the chagrin of  
receivers, actually).


Ken Simpson

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