Denial of service detection and prevention using dialog level filtering
US8719926B2 · kind B2 · utility
2Cited by
28References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2011 |
| Grant date | May 6, 2014 |
| Priority date | — |
| Expiry date | May 24, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L65/1104
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method may include receiving a session initiation protocol (SIP) request message and determining whether a dialog exists corresponding to the request message. The method may also include determining whether the dialog is in a first phase or a second phase when a dialog exists corresponding to the session control protocol message and querying a table indicating valid protocol requests for the determined phase to determine whether the received request message is valid. The method may include rejecting the request message when determined that the request message is not valid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.