Method and apparatus for protecting legitimate traffic from DoS and DDoS attacks
US7882556B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2003 |
| Grant date | Feb 1, 2011 |
| Priority date | — |
| Expiry date | Oct 5, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L47/6255
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An apparatus for protecting legitimate traffic from DoS and DDoS attacks has a high-priority (505) and a low-priority (506) queue. Besides, a queue information table (402) has STT (Source-based Traffic Trunk) service queue information of a specific packet. A queue coordinator (502) updates the queue information table (502) based on a load of a provided STT and a load of the high-priority queue (505). A packet classifier (504) receives a packet from the network access unit (508), investigates an STT service queue of the packet from the queue information table (502), selectively transfers the packet to the high-priority (505) or the low-priority (506) queue and provides information on the packet to the queue coordinator (503). A buffer (507) buffers outputs of the high-priority (505) and the low-priority (506) queue and provides outputs to the network (509) to be protected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.