A method for enforcing security policies required to gain access to a network includes determining if a client desiring a connection to the network is in conformance with a current version of the security policies, and if a client is not in conformance with a current version of the security policies,...http://www.google.com.au/patents/US7877786?utm_source=gb-gplus-sharePatent US7877786 - Method, apparatus and network architecture for enforcing security policies using an isolated subnet
