The good thing is that you don't need to know which ports to block. You just set your firewall up to deny by default and then start whitelisting the things you want to allow.
Even easier if you put your "smart" devices in a separate network, then it's just:
- Allow traffic from home net to Internet
- allow traffic from home net to iot-net
- drop the rest
Now you can surf the internet, control your devices and they can't phone home
Hmpff, ich fand ihn ja schon immer latent unsympathisch. Dass er jetzt mit den "Christ"-"Demokraten" Politik machen will bestätigt das irgendwie.