several installations of Info-Beamer are inside corporate buildings So far the IT departments have put the device on a fixed address, and opened every connection/port to and from the Raspberry on the corporate firewall.
But maybe this is too much.
What are the minimum ports/hostname/ips that need to be opened in order for an InfoBeamer hosted to work?
I suppose an HTTPS connection to infobeamer.com is needed, and what more? Who initiates the websocket connection?
A list (if publicly available) would be nice to give to those IT departments.