If your site was ever exploited in the way that the admin details are gave up to where the user can access your admin panel and do whatever they want.

This is how i keep this from ever happening
TESTED AND FOUND NO ISSUES BY DOING THIS

create and .htacces file in your admin folder

Paste into folder

Code:
Order Deny,Allow
Deny from all
Allow from your ip address here
Change the ip address as needed