To configure in enforcing/permissive mode, edit the SELinux configuration file /etc/sysconfig/selinux.
# vi /etc/sysconfig/selinux
There will be a number of variables in the configuration file, the following variables need to be modified. You can add whether enforcing or permissive.
SELINUX=permissive
OR
SELINUX=enforcing

Once the changes made, reboot the server to reflect the changes. The reboot process will see all the files in the server labelled with an SELinux context. Once rebooted, the SELinux changes will be reflecting and the implementation will be fine.