Have I read the related troubleshooter articles above before posting (which pages?)? Yes
Have I searched the tickets before posting? Yes
Have I read the documentation before posting (which pages?)? Yes
Joomla! version: 2.5.11
PHP version: 5.3+
MySQL version: 5.5+
Host: Siteground
Admin Tools version: 2.5.4
Description of my issue: This is not a bug in Admin Tools or a problem with the extension. Recently I have observed thousands of security exceptions. Someone robot is trying to enter random usernames and passwords in the admin area. I use a secret parameter in the admin URL. However that seems to be bypassed by the hacker by using the following URL:
site.com/administrator/index.php?option=com_login
This URL and the wrong sets of usernames/passwords are logged in the Admin Tools exceptions area.
Please let me know how I can stop the hacker from accessing the admin area via the above URL.