I noticed that there is no security at all contacting the Nucleus one from the network. With guests using the network too. Just a Web browser and the ip address will let you change, or by accident ruin your server.
Is nobody worried about this, or did I forget some security setting?
Nope there is no security setting as you are asking about. There are several Feature Requests about this, you might go and add your vote to one of them.
You are absolutely right. But not all home Internet routers (from your Internet provider) have options to route guests directly to the Internet. And most users are not familiar in configuring a router.
Manty people will buy a Nucleus because it’s plug and play. So you expect some security settings to protect it.
Happily I know how to do it and happily I have Ubiquiti AP’s. So don’t worry.
But with my Internet home router I couldn’t manage this.