Restrict RDP port based on a Dynamic DNS

I want to set a restriction on my firewall (windows firewall on windows 2008) to only allow connections fr开发者_StackOverflowom a certain dynamic DNS. Is this possible?

The reason I ask is that this would allow us to just change the IP on the dynamic DNS if our IP changes and means we won't get locked out of RDP. This also allows me to RDP in from other locations that have IP's that are not static by just changing the IP against the DNS.

Any ideas.

Thanks in advance.

We have created a program that will create the firewall rules based on out DNS instead. This has solved this for us.