In a recent programme on local TV, some investigative journalist reported that they had found many
NAS devices online. A certain brand of NAS comes with sharing enabled by default, with a default password.
You just need to unpack your NAS and connect it to your local network and all the data you put on it
is accessible to the world. It uses UPNP to overcome the NAT problem.
The journalist found several NAS boxes with backups of very private data on it.
Another issue is the HP all-in-one printer/scanner devices, which also are internet connected by
default (even via WiFi). So you can access them from your smartphone, how convenient.
But they found people who had left private documents like account activation letters on the scanner,
and could remotely start a scan and read the document.
The users who were contacted were not aware of any problem.
So, it is a big security risk. But to have this work in the case you know what you are doing and
purposely want to share your data or your device, you need the possibilty to contact your port 80.
So it is no good if the provider blocks this with no way to unblock it.
That is forbidden here. A provider must give transparent access when the customer wants that.