Please introduce a red flashlight on screen and a warning tone if an Android app or an internet webpage tries to connect to a server forbidden/blocked by firewall (outgoing) and with a different color and tone if an internet server tries to connect to the phone (incoming) on a port blocked by firewall or if an Android app tries to access data on the phone in a nasty way.
This would warn the user and also clear the situation in a quick way if an Android app doesn’t work or also a homepage doesn’t work or tries to do evil.