Having moved from Windows to Linux partially because Windows was about as secure as a flyscreen door, I've recently switched back to Windows. Whenever a versio

Having moved from Windows to Linux partially because Windows was about as secure as a flyscreen door, I've recently switched back to Windows. Whenever a version of an app wants to provide a network service, Windows first asks if this specific app can provide network services on this class of network (public connection or private connection). So it is not just builtin, but for a particular class of restriction even easy to use. Blocking consumption of resources is an advanced feature though. I used to use a program called "firestarter" on Linux, which provided a way to block specific apps. Long time since I've done that though, since most of the untrusted apps on Linux are Chrome and the ones you run in Firefox.