Comment We don't put it directly on the internet (Score 1) 106
That is so 1990's.
We install a VPN router to connect to the home network through that? So the only thing we need to secure are the VPN?
Everything else is insanity and who wants to spend all their free time checking up on all their appliances to see if they are secure with the latest patches? Most of them probably won't be and the hardware will outlive the software updates.
Will there be security updates for your heatpump in 10 or even 5 years? I doubt it. But it is damn to be able to turn on the heat or cold from the office.