Dynamic DNS for your IP Address: Irritated that your broadband ISP changes your IP address every now and again so you can’t map a domain name and run a server? Solve that problem for $20 a year, but watch out that you don’t create a new problem.
The DNS2Go client software is installed on the computer with which you want to associate your domain name. The software always knows your computer’s current IP address, and it quietly and automatically notifies the DNS2Go service whenever that IP address changes. The DNS2Go service then modifies the DNS zone records associated with your domain, and the change takes effect almost immediately.
This is all well and good until your ISP gets hip to the fact that your running a file sharing server and starts blocking ports.