Update a DNS to a for a dynamic IP

I want to use my schools connection as a place to host a small webserver but one problem I have run into is anytime my server reboots I am given a new IP inside the schools range.

All of the schools IP are public and therefor I can access my computer directly over WAN just via the IP given in ifconfig. I would like to be able to give my computer a dns which is easy enough when I change the Arecords to match the current IP of my computer. The problem is if my computer ever reboots (my school regularly cycles power at night and over holidays) I am assigned a new IP and have to realize it then update the Arecords

This is inconvenient and I figure there must be a better way to keep the DNS records updated either via a script or my own BIND server. That way if there is a power cycle I can still access the server via a Domain Name.

If you have any direction to point me in it would be much appreciated.

I am running Ubuntu 10.04 if that helps :).

One option is to use a dynamic DNS service such as the one offered by DynDNS, see here for more info http://www.dyndns.com/support/kb/dyndns.html

Once you have an account setup, use a client like DDClient to update your DNS records when you computer's IP changes.

If you are planning to use your domain name and don't want to pay then you can try

http://freedns.afraid.org/ or

http://www.everydns.net --> they were bought over by DyDNS