This guide is wraped for easy viewing, to see the non wraped version Click Here
Installing mod_evasive (formally known as mod_dosevasive)
Login too your server and execute
cd /usr/local/src
wget http://www.nuclearelephant.com/projects/mod_evasive/mod_evasive_1.10.1.tar.gz
tar -zxvf mod_evasive_1.10.1.tar.gz
cd mod_evasive