Howtoforge posted a tutorial about setting up your own nameserver with ISPConfig 3

This tutorial shows how you can run your own name server for domains that you register with fasthosts.com. Of course, this works with every other registrar as well, although the procedure might differ a little bit. We will use the ISPConfig 3 server as the primary name server and also acting as the secondary. This may be suited best to a single server setup. To do this, you need one server with ISPConfig 3 installed and a Fast hosts account.

How To Run Your Own Name Server With ISPConfig 3 And Fast Hosts