I'm running a multisite Drupal installation, Drupal's multisite allows me to run different websites off the same set of PHP files, but with different databases (so different content). Like example.com, example1.com, and example2.com. All of them point to single folder in my server.
 
What should be added to .htaccess file to use http authentication only for example2.com without affecting others (example.com and example1.com).
 
I have used below code to achieve what i want..
 

1. # set the "require_auth" var if Host ends with "example2.com"