State-based filtering on a packet switch appliance
US8315256B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2008 |
| Grant date | Nov 20, 2012 |
| Priority date | — |
| Expiry date | May 31, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L49/355
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A packet switch appliance includes a plurality of ports. One of the plurality of ports is configured to operate as a network port connected to a packet-switching network. Another of the plurality of ports is configured to operate as a first instrument port connected to a network instrument. To filter packets, one or more packets or copies of packets received through the first network port are examined prior to the packets or copies of packets being sent out the first instrument port to determine a current state of a state-based protocol, which includes a plurality of potential states. A filter is created or modified for the first network port or the first instrument port based on the determined current state of the state-based protocol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.