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From Apache Wiki <wikidi...@apache.org>
Subject [Httpd Wiki] Trivial Update of "DoS" by GuillermoGrandes
Date Sun, 30 Dec 2012 10:55:16 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Httpd Wiki" for change notification.

The "DoS" page has been changed by GuillermoGrandes:
http://wiki.apache.org/httpd/DoS?action=diff&rev1=9&rev2=10

Comment:
link to patch

  
  --(The slowloris script is also a big CPU drain on its own host.  Running it on my opensolaris
box, it took around 50% of the CPU (as shown by top(1)) to hold 252 connections open and trickle
data.  On linux it was over 99% to hold 1020 connections.  Running both slowloris and apache
on the linux box, apache responded effortlessly to /server-status requests while servicing
the slowloris attack, all while sharing the <1% of CPU left by slowloris with top and the
Gnome desktop.)--
  
- ['''Update: 29.Apr.2011'''] slowloris-perl can be patched (1 line) to reduce CPU drain...
(only use 2%, 500 connections in linux-box/threaded, this crash typical server in 15 seconds)
+ ['''Update: 29.Apr.2011'''] slowloris-perl can be [[http://pastebin.com/z3cveHKA|patched]]
(1 line) to reduce CPU drain... (only use 2%, 500 connections in linux-box/threaded, this
crash typical server in 15 seconds)
  
  MaxClients
  

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