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From "Boyle Owen" <>
Subject RE: [users@httpd] how to prevent malicious scripting attack
Date Thu, 01 Apr 2004 16:10:00 GMT
Plain text please...

It's obviously a robot but not necessarily a malicious one. You might
try putting a robots.txt file on the server (see for details). This is a
voluntary standard but well-behaved robots are supposed to obey it.

Owen Boyle
Disclaimer: Any disclaimer attached to this message may be ignored. 

-----Original Message-----
From: Liu, Jack [mailto:Jack.Liu@FALCONJET.COM]
Sent: Donnerstag, 1. April 2004 17:59
To: ''
Subject: [users@httpd] how to prevent malicious scripting attack

  I checked the access.log, and found there are many requests coming
from one IP address. Normally, when human gets one page, he will at
least spend 10 or 20 seconds to take a look at the page, then move on to
another page. However, in the log file, the request from this IP address
changes page within mili-seconds constantly and lasts for several hours.
That is why I believe it is some kind of automation program or scrip
running on this IP address. Human cannot move that fast. 
It cause our HTTP server stop resoponding to users. 
(I know "deny,allow" directive, they only apply to
Directory,File,Location. They don't apply on the Server level. Setting
it Directory, File, Location doesn't help, because the HTTP request
still consume resource until the server cannot take it anymore. If I can
set them up at the Server lever, when the request comes from this IP
address, the Sever can drop it completely without bothering to allocate
more resource.)
  Does the HTTP server have the ability to detect such "pattern of
behavior" accordingly? 
  If not, any idea of other HTTP server which can do this, detecting
such "pattern of behavior" (so that we may block it in the router).


  Jack Liu

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