to;dr: school, raspi, spoofing, public status screen, funny pictured.

So. At school we had these huge ass 2/3 TVs displaying some information such as which teacher is ill, which lessons won't take place and some school related news. Standard stuff.

They worked using a raspberry pi attached to the TV fetching a website over http every now and then.

Using nmap I discovered that these pi's were in the same network as the pupils devices: Sweeeet.

After trying some standard passwords at the ssh port and not succeeding I came up with something different: A spoofing attack.

I would relay all traffic from those pi's through my device, would replace all images with a trollface picture (I know I know) and flip all text upside down.

Chaos, annoyed faces and laughter.
It was beautiful.