An inverted network design employs the philosophy that that security should be focused at the core of the network rather than on the perimeter (where firewalls, anti-virus and iintrusion detection systems would typically sit).
Recognizing the increasingly threats to the enterprise network come from with, even internal LANs — and every component connected to it — are considered "dirty." For example, in an inverted network, VPN connections would be established from the desktop to the server.
