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Well I find this 3 apache modules (mod_evasive, mod_qos, mod_security) but I want to know wich is better to defend my server from a Denial-of-service attack?

Server version: Apache/2.2.17 (Win32) Server built: Oct 18 2010 19:45:39

On Microsoft Windows [Version 6.1.7600] and Microsoft Windows [Version 5.2.3790]

Also if you know a better one please tell me!!!

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This question is bad on so many levels. First you should read the faq, then you should read How to Ask a Question. –  MDMarra Nov 3 '11 at 15:36
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1 Answer

I'd be much more concerned about the fact that you're running 2.2.17, which is vulnerable to the Range Header DOS attack on unpatched Windows. 6.1.7600 is either Windows 7 or Windows Server 2008 R2 without SP1 installed.

All of the Apache modules in the world won't save you from a kernel vulnerability or Apache vulnerability like the range header exploit.

Also, running Apache on Windows in production is just weird, IMO. It's kind of a bolt-on implementation as opposed to the Linux/Unix native implementation.

As far as the modules that you're asking about. Read here. Apache HTTPD server is extremely well documented.

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