Upgrading firewall module on port-by-port basis
US11743234B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2021 |
| Grant date | Aug 29, 2023 |
| Priority date | — |
| Expiry date | Dec 18, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/20
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Some embodiments of the invention provide a method of upgrading a firewall module executing on a host computer to process traffic sent to and from machines executing on the host computer. While a first version of the firewall module executes on the host computer to process the traffic to and from the machines, the method loads a second version of the firewall module alongside the first version of the firewall module. For each of multiple ports associated with machines executing on the host computer for which the firewall module processes traffic sent to and from the port, the method saves a runtime state of the first version that relates to the port, transfers association of a firewall filter associated with the port from the first version to the second version, and restores the saved runtime state for the port to the second version.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.