iDNS is a configuration tool that makes setting up your own DNS server as simple as possible. iDNS uses the de facto standard DNS server, BIND, which comes installed on every Mac. The tool to configure this DNS server is not included by Apple on standard Mac OS X installations, only Mac OS X Server. But what if you don't want to buy Apple's expensive Server operating system just for a DNS server? This is the beauty of iDNS!