Step One—Install Deny Hosts

We need to use a repository to install Deny Hosts on CentOS.

sudo rpm -Uvh http://mirror.metrocast.net/fedora/epel/6/i386/epel-release-6-8.noarch.rpm

sudo yum install denyhosts

Once the program has finished downloading to the VPS, denyhosts is installed and configured.

yum install denyhosts

http://blogger.liaohaha.tw/2012/02/denyhosts.html