DNS requires that a name server somewhere on the Internet keep track of 'where you are' (i.e. That is, its database must always be updated to make sure your hostname always corresponds to your current IP address.
1 cable is connected to the WLAN router which im talking about right now.
This can be done as a daily scheduled task, using cron.
You should be able to log in to your Dynamic DNS provider's website and verify that the DNS entry is being updated. Alternatively you can type your hostname into a service like
Now that we have a working own Cloud installation on our Raspberry Pi, we need a way to be able to remotely access the device from across the internet.
Knowing the IP address and forwarding the appropriate ports on the router is only part of the story: most residential ISPs will periodically change the external IP address of their customers for logistical reasons that we won’t get into here (it’s a matter of traditional infrastructure limitations and convenience for the ISP).