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| Number | Title | Issue Date |
| 5898830 | Firewall providing enhanced network security and user transparency The present invention, generally speaking, 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-us... | 04/27/1999 |
| 5870550 | Web server employing multi-homed, moldular framework A Web server is provided having a multi-homed, modular framework. The modular framework allows extensions to the Web server to be easily compiled into the Web server, allowing the extensions to run natively as part of the server instead of incurring the o... | 02/09/1999 |
| 5826014 | Firewall system for protecting network elements connected to a public network Providing a firewall for isolating network elements from a publicly accessible network to which such network elements are attached. The firewall operates on a stand alone computer connected between the public network and the network elements to be protect... | 10/20/1998 |
