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Date:      Thu, 2 Nov 2000 15:15:23 -0500 (COT)
From:      Buliwyf McGraw <buliwyf@libertad.univalle.edu.co>
To:        security@FreeBSD.ORG
Subject:   DOS attack
Message-ID:  <Pine.BSF.4.21.0011021439550.10392-100000@libertad.univalle.edu.co>

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 Ok... here we go again ;)
 I was researching about the last incidents on the machine with the
 system load problem (possible attack) ... 
 I get this: the service which crash the server when the problem 
 starts is the famous "squid".
 Normal days, the squid is running without problems and the load of 
 the server is 0.5 (average), the required cputime for the program
 is 20%. Then the world is beatiful.
 But, when we have a bad day... the squid need 90% 95% 100% cputime
 and the load of the server jump until crash. The interrupts are too
 big in these moments.
 If i quit the network cable from the server... the load dissapear and
 everything is rigth, but, if i put the network cable again... booom!!!

 The problem isnt everyday, is just sometimes, somedays... few hours.

 Thanks for any comment or sugestion... ;)

=======================================================================
 Buliwyf McGraw
 Administrador del Servidor Libertad
 Centro de Servicios de Informacion
 Universidad del Valle
=======================================================================




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