First you will need to enable the ELEP repowget https://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
rpm -ivh epel-release-6-8.noarch.rpm
yum update
next install syslog-ngyum install syslog-ng
next if we are using a mysql backend, we wil have to install the plugin and mysql serveryum install syslog-ng-libdbi mysql-server