Using packet filters and network virtualization to restrict network communications
US7093288B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2000 |
| Grant date | Aug 15, 2006 |
| Priority date | — |
| Expiry date | Jun 16, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/0263
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A network mediator corresponding to a computing device uses packet filters to restrict network communications. The network mediator includes a set of one or more filters, each filter having parameters that are compared to corresponding parameters of a data packet to be passed through the network mediator. The network mediator determines whether to allow the data packet through based on whether the data packet parameters match any filter parameters. The set of filters can be modified by a remote device, but cannot be modified by the computing device whose communications are being restricted. When a data packet is sent from the computing device, the data packet will include the virtual address which is changed to the network address by the network mediator prior to forwarding the packet on the network, and vice versa. By virtualizing the addresses, the computing device is restricted in accessing other devices over the network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.