[activemx]

What i think you are looking for is yourdomainname.net to point to an ip address at your home Ip address? Two questions is this website internal? meaning that it can be only accessed by computers on your local network or a public domain. A site that can be accessed by anyone from anywhere with internet. BAsically you first need a public IP address, for that you have to contact you ISP. They charge 5 bucks for a set per month i think. You can also do this with dynamic DNS if you dont have a static IP. BUt hten on the server it has to keep updating ur dynamic IP. Technically if its internal, the router already has a DNS server built in. Meaning that you are already running a DNS server on ur network, otherwise there wont be a network. Remember a DNS server basically manages a set of ip addresses. The set of ipaddresses can be public or private.
Not sure if i hit any part of your question.