Inventors:
Ramesh M. Gupta - San Jose CA, US
Parveen K. Jain - San Jose CA, US
Keith E. Amidon - Fremont CA, US
Fengmin Gong - Livermore CA, US
Srikant Vissamsetti - Fremont CA, US
Steve M. Haeffele - Los Gatos CA, US
Ananth Raman - San Jose CA, US
Assignee:
McAfee, Inc. - Santa Clara CA
International Classification:
G06F 11/00
US Classification:
726 23, 726 22, 726 26, 705 51, 705 52, 705 53, 705 54, 713189, 713190, 713191, 713192, 713193, 717174, 717175, 717176, 717177, 717178
Abstract:
A method of detecting intrusions on a computer includes the step of identifying an internet protocol field range describing fields within internet protocol packets received by a computer. A connectivity range is also established which describes a distribution of network traffic received by the computer. An internet protocol field threshold and a connectivity threshold are then determined from the internet protocol field range and connectivity range, respectively. During the operation of the computer, values are calculated for the internet protocol field range and connectivity range. These values are compared to the internet protocol metric threshold and connectivity metric threshold so as to identify an intrusion on the computer.