With an .htaccess file, you shall determine how the web server which manages the requests to your web sites have to act in different cases. This is a text file with directives that are executed when someone tries to open your Internet site and what happens next is determined by the content of the file. For instance, you may block a certain IP address from opening the site, which means that the server will decline the visitor’s request, or you can forward your domain name to an alternative URL, so the server will redirect the visitor to the new web address. You can also use customized error pages or preserve any part of your site with a password, if you place an .htaccess file in the correct folder. Many well-known script-driven applications, like WordPress, Drupal™ and Joomla™, use an .htaccess file to work correctly.