I've made a couple DNS updaters that change your IP in the A records of a domain registrar automatically when your IP of the WAN where your server is located changes. Just finished the GoDaddy one last night, and anyone who needs it is free to reap the benefits of my labor! It does require you use a *NIX type server though. There's no way I'm coding anything for Windows anymore 😉 You just need to put in your userid, password & domain name into the script. Follow the instructions in the README file on github for what to put into cron for 5 minute checks.