In my homelab I historically used a couple of MS Windows Server machines to run DNS and authentication services. They did their job perfectly, but I realized that lately no single machine in my network was joined to their Active Directory domain, and so basically I was using them as just DNS servers. To simplify my lab I decided to switch them to two Linux servers, using Bind as the dns service and Webmin to have a comfortable user interface. This is how I did.
Virtual To The Core
Virtualization blog, the italian way.