Intelliarp watch net devices and automatic allow or deny access from mobile machines (like notebooks) in an Intranet, using ARP for MAC registration.The mobile can use any configuration(fix IP or DHCP) and Intelliarp will give control on it.
An alternative Identification system that is a replacement for Microsoft's Passport and the Liberty Alliance. Its a simple architecture that is setup so anyone can run a server and thereby have control over their online identification.