How would you deal with customers' corporate IT banning any non-certified OS from the network? At work, we have a big TV screen showing an alert overview (a Gr

How would you deal with customers' corporate IT banning any non-certified OS from the network? At work, we have a big TV screen showing an alert overview (a Grafana dashboard). A Raspberry Pi with Raspbian and Firefox would be enough to do that, but if we were to connect one to the LAN, its MAC would be blacklisted within less than a hour. (I've heard a report from a contractor plugging his own notebook into Ethernet, who had said cable ripped out by the local admin a few minutes later.) We ended up using an old notebook from one of our colleagues running Windows 7 Enterprise. Every few days, we have to RDP into it to click through app updates or restart the browser or something like that.