Setup automatic IP update
Router with an integrated DynDNS service
Many routers support DynDNS services out of the box. In this case, please refer to the documentation for your special router. Find out, if FreeDNS is supported. If not, please refer to the next section.
Router without an integrated DynDNS service
If your router does not support a DynDNS service, you can install a special program called a "DynDNS client" inside your home network. In this case you can find here a program that fits to your system.