Before we proceed, take note of several things:

# The actual VPN connection must be made from OUTSIDE your home network. You can't test your VPN setup (which presumes, like “E.T.,” that you're trying to “home phone” from somewhere else) if you're still INSIDE your home network. In my case, I explained to my patient neighbors what I needed to do and got permission from them to connect to their Wi-Fi router. (It helped the situation that I've helped fix and de-louse their computer on numerous occaisions.) Thus I could test this while at home, but still be “away” as far as the network was concerned.