You can do this using CARP.
@ar4uall:
Hey guys,
I don't know if this is possible or not, or if there's a genie out there that did it.
Situation, i have a PfSense box with Captive Portal authenticating users to a NPS on 15 airports, meaning 1 box and 1 NPS per airport.
Now pilots travelling from an airport to another don't want to re-authenticate at each airport they travel to.
Is it possible that once they authenticated to a 1st box, that 1st box replicates the authenticated user to all the other ones so the user does not need to re-authenticate again?! ???
Thanks you very much for your time. ;)