Stige wrote: |
Yes, they usually have a tool for automaticly updating it, atleast DynDns does. |
That's one way.
The other way is to have your modem report them whenever your IP changes. But for that your modem has to support their service.
For example, my ADSL modem supports a few well known dynamic DNS services.

Beware of he who would deny you access to information, for in his heart he dreams himself your master.
Commisssioner Pravin Lal
"U.N. Declaration of Rights"