Let's say I have 20 Raspberry Pis each located in different cities. I want to be able to monitor them, transfer files to/from them, control them, etc. remotely and securely from my office.
I searched for possible solutions in the past few days, and found the following solutions:
- Port Forwarding
- VPN
- Using some 3rd party websites like RealVNC, Remote3.it, TeamViewer, etc.
As I've understood, the port forwarding is the least secure solution in this list. Also, 3rd party websites have limits on the number of Pis you can access in free versions. Besides, they are not open source, so you cannot design your desired monitoring system/interface based on them. Hence, the VPN seems a better solution all in all.
As for the VPN, I searched the net a lot, but in most of the relevant tutorials, the RPi is the server, and the PC is the client. There's no problem in being so, until you have only 1 RPi to remotely access to.
Now here are my questions:
- If I want to remotely access to 20 RPis in different locations and monitor them from 1 PC, what configuration shall I use !? 20 VPN servers + 1 client !? How is this possible !? Or shall I change the configuration to 1 server + 20 clients !? If so, how shall I do that !?
- Are there any other methods for remote access to RPis securely from the office!? (else than those 3 ones listed above)?
Thanks.