Dynamically inserting filters into forwarding paths of a network device
US7769873B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 25, 2002 |
| Grant date | Aug 3, 2010 |
| Priority date | — |
| Expiry date | Sep 12, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/1458
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Techniques are described for dynamically inserting filters into a forwarding path of a router in response to a received filter description. For example, a first router may receive a generic filter description, and process the generic filter description to generate machine instructions executable by forwarding hardware. The forwarding hardware, which may be a forwarding engine or an interface card, executes the machine instructions to implement the dynamic filter. The router, for instance, may filter packet flows of a device sourcing a network disturbance, such as a denial of service (DoS) attack by applying the dynamic filter to the packet flows. The router may further forward the filter description to neighboring routers to filter the packet flows closer to the source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.