I would like to use a special inteet-domain of mine, to securely access "Banana Pi-M3 Board Einplatinencomputer" or "Raspberry Pi 3 Model B, Quadcore CPU, 1GB RAM, WLAN, BT" (I am not quite sure which to buy by now), which is behind the FritzBox, the machine use windows 10 as operating system. I would like to access and control securely functions of my "Banana" or "Raspberry" via the inteet for example.
How shall I build my IT-Infrastructure and to access securely my PI ?
Should I write a web service/interface....or how should I do it ?
I know C# and a little bit of Node.js.
Maybe you know good source I can read about ?
Thanks for helping.