I have a pi2, connected via wifi to the internet. What I want to be able to do is plug an ethernet cable from my switch to the Pi ethernet port, and share the internet connection the Pi has with the rest of my network.
HOWEVER, I don't want anyone on the Pis wifi network to be able to reach machines on the ethernet port side... does that make sense, and is it doable? If so, how! I've read many articles on setting up the pi as a router, but they don't make clear that the two networks will not be able to interact, other than using the internet connection of the wifi router.