Try this too,

 - Keep your Joomla up-to-date together with its extensions.
 - Keep regularly backups of your site in [clouds][1].
 - Do not open `robots.txt` for secured folders.
 - For the latest Joomla versions, making use of the two-factor authentication will be more secure.
 - Make sure folders and files have the right permissions allowed.
 - Use Cloudfare for [Joomla][2].

Hope its helps..

 

 


  [1]: http://extensions.joomla.org/extensions/access-a-security/site-security/backup/25698
  [2]: http://extensions.joomla.org/extensions/core-enhancements/performance/content-networking/16320