How can a network be designed in a way that only nodes connected will have access to resources hosted on that network

[dvlpmntmnnl]

I am developing a network application which should be accessed by nodes in a local network. Devices from other networks must not be able to access this application except from their network. Again, the local server will have to be connected to a cloud database but then provide the needed data for the local network which its serving. Is this possible, and if yes, how please?

 

[hang-the-9]

Not really sure why you would have any issues there, if you setup the network rights properly then devices from other networks won't be able to reach yours. It's a standard network setup, any book on network security will have the info you need. Heck, a basic router will stop most outside networks from connecting to yours.