We would like to deploy a public facing DNS server in our DMZ. All of our DMZ servers reside on a VMware 5 host. I was wondering if there are any open source DNS servers with web interfaces that come pre-assembled on a hardened Linux appliance. I'm basically looking for an OVF template that I can deploy on our VMware host and then browse to it to configure it. I don't know enough about Linux to properly deploy a secure DNS server from scratch and I don't really want to pay for Windows Server 2008 R2 licenses just for DNS.