Quadra Hosting implemented HTTP authentication to prevent malicious bots from performing a brute force password attempt on your Wordpress sites. Such attempts, not only endanger the security of your web site if they managed to crack your password, but can also severely degrade your web site and the server's performance.
There are some wordpress plugins that can help you stop such brute force login attempts, but they do not help with the server's performance and as a result, the use of such plugins will still cause a serious degradation in your site performance when subjected to brute force login attacks.
Because of this, we recommend you not to disable our HTTP authentication prompt. However if you must disable it, here's how:
Add the following lines to your wordpress .htaccess
Allow from all