joomla website 100% Secure Guarantee, here i am trying to describe how to secure your sire winch is powered by joomla or wordpress or drupal or any cms where admin panel available. you just assign that from which ip this site will give opportunity to administrator login
here the code
<Limit GET>
Order Deny, Allow
Deny from all
allow from IP (Your PC or laptop Ip adress)
</Limit>
just keep this to administrator folder
then the result you can see, without this IP (which u wull provide in allow from ), from no othere IP will login to administrator.