I’m doing an apprenticeship at a company that manages networks for medical practices. Both our office and all the practices we support run on Unifi gear. One of those clients just happens to be the CEO’s parents, whose clinic is literally right next door. Their network is set up behind our office network.

One day, a colleague was tasked with setting up a demo server rack. Plug a laptop into the Unifi Dream Machine via LAN, WiFi off just to be safe, load up a backup image, add it to Enterprise Management, done.

Except… not done.

After the backup was supposedly restored, we disconnected the LAN and tried to reach the UDM’s web interface through the management portal. But it just didn't appear. So we kept poking at it, scratching our heads over what was wrong.

That’s when the clinic next door, the CEO’s parents’ clinic, suddenly lost their entire network.

Turns out the UDMs web interface we’d been happily messing with wasn’t the demo unit in our rack, nor the one providing internet to the rack from our own office. Nope, we’d somehow managed to connect straight into the CEO’s parents’ live production system which was also conveniently named exactly like our backup, so we didn't notice, and pushed the backup image there.

Needless to say, nobody was particularly amused.

Since that day, we use a separate Unifi account which can only manage demo and other clients networks, not the company network or that clinics network.