Resources
"Placing an Active Directory in the DMZ," by Danielle and Nelson Ruest (Windows Server System Magazine, April 2004)
"Security Strategies—Follow Established Best Practices," by Geir Olsen (.NET Magazine, May 2003)
"Secure and Manage Windows Server 2003," by Nils Odhner (.NET Magazine, June 2003)
FTPOnline's Security Hot Topic page