Out of the box, the Icinga Classic interface uses standard Apache .htaccess files (http://docs.icinga.org/1.5.0/en/cgiauth.html) to secure both the CGIs and the classic web interface. Living in an Active Directory world, I'm always looking for ways to integrate products with my existing AD credentials so I don't have to log in again. I decided our move from Nagios to Icinga was a good opportunity to figure out how achieve integrated Windows authentication (IWA) in Apache since we were having to figure out how to configure everything anyway.

What is Kerberos