Hamiltonian path as protection against DOS.

James A. Donald jamesd at echeque.com
Thu Aug 17 16:58:06 EDT 2006

Anne & Lynn Wheeler wrote:
 > as an aside, i've pointed out before that in the
 > mid-90s that as webserver activity was increasing ...
 > a lot of platforms experienced severe throughput
 > degradation with HTTP transaction protocol use of TCP.
 > Most platforms had a highly inefficient session close
 > implementation around checking of the FINWAIT list ...
 > the assumption as that most session activity had
 > relatively infrequent session open/close activity. The
 > HTTP transaction activity violated those TCP activity
 > assumptions ... and for a period of time you found
 > platforms spending over 95percent of their processor
 > utilization dealing with the FINWAIT list.

Has this been entirely fixed, or is some substantial
degree of inefficiency inherent in the TCP protocol if
one uses it in a manner that tends to approximate  UDP.
(Lots of brief connections that are predominantly one

The keep-alive extension to the HTTP protocol was
intended to make HTTP activity more TCP like.

          James A. Donald

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