This page explains how to provide a DNS name to a webserver running at your home, when you have *not* paid for a static IP.   

Your first step is to register a domain name for yourself (a domain would be something like cmed.us, or gwu.edu, or google.com, but you need to pick one that is not used).  This is very simple to do, and can cost very little ($10 a year or less).  

There are many different places you can go to for getting a domain name.  

If you go with my suggestion below, and use freedns.afraid.org, then the DNS servers that the register will want from you will be: 

If you don't host your own DNS service, then I would suggest your register with freedns.afraid.org.  They will provide you free DNS services so that you can point any hostname (like net.cmed.us) to any server IP.  

 

If you have a computer at home that you want to get to from out on the web, and you have a dynamic IP address provided to you by your cable company, then you need some way of automatically updating your DNS servers (freedns.afraid.org) every time your cable company changes your IP address. 

The page that comes up will provide you with a simple cron command to run that will automatically update DNS with the external IP address of the server that ran the command.