Network access control using network address translation
US7072933B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2000 |
| Grant date | Jul 4, 2006 |
| Priority date | — |
| Expiry date | Jan 24, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/564
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An improved network content filtering system and method utilize the network address translation functionality of a shared network connection to redirect outgoing packets from a client intended for a destination web server to an access controlling web server instead. Before a session to the destination web server is established, the access controlling web server either approves or refuses the connection, providing a content filtering mechanism. If the connection is refused, the access controlling web server may substitute other content for a filtered URL. In order to identify the client, the shared connection may additionally embed an identifier token in the redirected traffic, so as to customize the filtering action or to facilitate billing functions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.