Due to the constantly increasing brute force attacks against WordPress sites, we have implemented couple of additional server side measures, one of which includes extra authentication layer for your WordPress and Joomla login page and prevent your account from being compromised.
For more information regarding this attacks please check the following article:
The Human Verification authentication layer is aimed to prevent most of those attacks. This security script will prompt for username and password when accessing the administration page of the Wordpress/Joomla. The authentication method will ask the user trying to log in, to type in a user name and password which will be provided in the prompt window.
Please, note that this username/password is in addition to your standard Administrator username/password.
When you enter the extra username/password you should be able to access your websites properly but at the same time, this authentication will stop any botnet script trying to get access to your account.
For more information on how to manage your Human Verification settings (Linux shared accounts) please, check: Human Verification (How to enable/disable?)