I'm looking for a not commercial NAC application, and i found Packetfence for Linux.
But i'm loving pfSense :-) and my question is: pfSense can work like NAC? if yes, how?
With Captive Portal you can provide the authentication portion. Outside of that there is no native functionality. There is no point in porting one of the two linux NAC solutions due to the integration with iptables on the linux-side. It would need to be written from the ground up with PF in mind.