I am developing an intranet site and I want to know if it is possible to authenticate windows users on a Unix/Apache/Perl platform. I am not even 100% sure what I am even asking for yet. But, on our network if you are using IE and go to a .NET site, you are automatically logged in. In C# I have found the classes that you would use to get this done and it *seems* like it is something the server does but I am not really sure. Basically, I just want to know if this is possible on a LAMP platform either with Perl or an Apache module and if so, I just need to be pointed in the right direction.