How to limit the number of concurrent CGI script invocations in Apache 2.2?

Posted by hsivonen on Server Fault See other posts from Server Fault or by hsivonen
Published on 2010-11-29T08:49:46Z Indexed on 2011/01/09 4:55 UTC
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apache

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apache2

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cgi

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bugzilla

How can I limit the number of concurrent CGI invocations in Apache 2.2.x?

More specifically, my problem is this: I have Apache hosting a Bugzilla instance and other stuff on one server. There's very little legitimate concurrent use of Bugzilla. However, it's trivial to mount a Denial of Service attack on the whole server by ignoring robots.txt and simply fetching a lot of bug pages that fork a process and hit a database.

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