Embodiments of the invention provide a functional architecture having {HEAD ~ a control unit} inside {TAIL ~ the firewall}, and a proxy server outside the firewall 
inside
Embodiments of the invention provide a functional architecture having { HEAD ~ a control unit } inside { TAIL ~ the firewall } , and a proxy server outside the firewall
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH