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How to Install mod_evasive

Download the source

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wget http://www.zdziarski.com/projects/mod_evasive/mod_evasive_1.10.1.tar.gz
tar -xzvf mod_evasive_1.10.1.tar.gz
cd mod_evasive
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Compile in the mod_evasive apache module using apxs

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For Apache 2
/usr/local/apache/bin/apxs -i -a -c mod_evasive20.c

For Apache 1.3
/usr/local/apache/bin/apxs -i -a -c mod_evasive.c
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If the apxs path is not /usr/local/apache/bin/apxs replace it with the appropriate path

Edit your httpd.conf /usr/local/apache/conf/httpd.conf

Add the lines below.

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DOSHashTableSize 3097
DOSPageCount 2
DOSSiteCount 50
DOSPageInterval 1
DOSSiteInterval 1
DOSBlockingPeriod 10
DOSEmailNotify user@yourdomain.com
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/etc/init.d/httpd restart

You can try another values for the above and obtain the best setting.
In some cases mod_evasive also blocks legitimate user IPs.

Install and enjoy….

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