The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 2009
Filed:
Aug. 02, 2004
Michael Lee Hall, Austin, TX (US);
Kevin L. Wiley, Austin, TX (US);
Munawar Hossain, Austin, TX (US);
Joseph M. Sirrianni, Ceder Park, TX (US);
Michael Lee Hall, Austin, TX (US);
Kevin L. Wiley, Austin, TX (US);
Munawar Hossain, Austin, TX (US);
Joseph M. Sirrianni, Ceder Park, TX (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
In accordance with one embodiment of the present invention, a method for inline intrusion detection includes receiving a packet at a physical interface of an intrusion detection system. The packet is tagged with a first VLAN identifier associated with an external network. The network further includes buffering the packet at the physical interface, communicating a copy of the packet to a processor, and analyzing the copy of the packet at the processor to determine whether the packet includes an attack signature. The method also includes communicating a reply message from the processor to the interface indicating whether the packet includes an attack signature. If the packet does not contain an attack signature the buffered copy of the packet is re-tagged with a second VLAN identifier associated with a protected network and re-tagged packet is communicated to the protected network.