The present invention provides a firewall that achieves maximum network security and maximum user convenience. The firewall employs “envoys” that exhibit the security robustness of prior-art proxies and the transparency and ease-of-use of prior-art packet filters, combining the best of both worlds....http://www.google.fr/patents/US7028336?utm_source=gb-gplus-shareBrevet US7028336 - Firewall providing enhanced network security and user transparency
Firewall providing enhanced network security and user transparency
