Applying fine-grain policy action to encapsulated network attacks
US9398043B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 2009 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Jan 23, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/1441
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An intrusion detection system inspects encapsulated packet flows and, upon detecting a malicious encapsulated packet flow, may close an encapsulated network session corresponding to the malicious flow or drop sub-packets of the malicious flow without acting against non-malicious sub-packets and/or sessions. In one example, a network device includes a flow analysis module that receives a packet flow packets, each packet comprising a packet header and one or more sub-packets each corresponding to respective network sessions, an attack detection module that identifies at least one of the network sessions as a malicious network session, a policy action module that executes a policy action on the sub-packet corresponding to the malicious network session based on the identification of the malicious network session, and a forwarding component that forms a reconstructed packet comprising the packet header and the sub-packets excluding the sub-packet corresponding to the malicious network session and forwards the reconstructed packet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.