Installing mod_evasive (formally known as mod_dosevasive)

Login to the server and execute

cd /usr/local/src

wget http://www.zdziarski.com/projects/mod_evasive/mod_evasive_1.10.1.tar.gz

tar -zxvf mod_evasive_1.10.1.tar.gz
cd mod_evasive

For apache 2.0.x

/usr/sbin/apxs -cia mod_evasive20.c

Then add add this too httpd.conf

<IfModule mod_evasive20.c>
DOSHashTableSize 3097
DOSPageCount 6
DOSSiteCount 100
DOSPageInterval 2
DOSSiteInterval 2
DOSBlockingPeriod 600
</IfModule>

For apache 1.3.x

/usr/local/apache/bin/apxs -cia mod_evasive.c

Then add this too httpd.conf

<IfModule mod_evasive.c>
DOSHashTableSize 3097
DOSPageCount 6
DOSSiteCount 100
DOSPageInterval 2
DOSSiteInterval 2
DOSBlockingPeriod 600
</IfModule>

Now just restart apache and the installation is complete.

/etc/init.d/httpd restart