1 droplets with web app, 2 office building, some phones and VPN?
I have 1 droplets which is running an web application.
I have 2 office building with out IP is not static.
I have some phones (android) use 3G.
And now, I want to config that only allows the pc inside that 2 office connect to that droplets web app.
beside, need to allows some specific phones to connect to that droplets web app too.
How can I do that? build a VPN? is there some links to learn how to do that?