System and method for reducing data stream interruption during failure of a firewall device
US7870602B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2005 |
| Grant date | Jan 11, 2011 |
| Priority date | — |
| Expiry date | Apr 8, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L69/40
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system and method of using a controller and firewall devices. Each of the firewall devices operate in an active mode during normal operation. The method may include the steps of determining when a first and/or second redundant data packet is received from a first/second firewall device, respectively, determining a valid sequence number, and transmitting the first/second redundant data packet to a target device when a sequence number of the first/second redundant data packet matches the valid sequence number and a first/second logical condition is satisfied, respectively. The first/second logical condition is at least one of the second/first firewall device is failed, a sequence number of the second/first redundant data packet varies from the valid sequence number, and the first/second firewall device is a primary firewall device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.