Joomla secuirty
http://extensions.joomla.org/extensions/access-a-security/site-security/site-protection
http://extensions.joomla.org/extensions/access-a-security/site-security/spam-protection
http://extensions.joomla.org/extensions/access-a-security/site-security/site-monitoring
http://extensions.joomla.org/extensions/access-a-security/site-security/update-check
http://extensions.joomla.org/extensions/access-a-security/site-security/spam-protection
http://extensions.joomla.org/extensions/access-a-security/site-security/site-monitoring/22225