Blackhole non authorised computers?

[Quackers]

I am sure it was on here, a few years ago, somebody pointed to an open source peice of software (think it was linux based), that allowed you to create a list of allowed MAC addresses, and if somebody plugged a computer in and it was not on the allow list all its traffic would get black holed.

 

Am i dreaming or does this exist?

[featured_spectre]

It does exist, but you need accurate routing tables and configs. I'll try to dig out the software later.

[plexer]

Packetfence is what you're looking for