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. 01, 2004
Filed:
Jan. 31, 2002
Brant D. Thomsen, Sandy, UT (US);
3Com Corporation, Santa Clara, CA (US);
Abstract
A method is described a NIC to ascertain the presence of spoofing activity and thus detect unauthorized network access. The NIC monitors for packets purporting to be from itself. In one embodiment, a NIC views packets trafficking on its network and monitors for packets having its own MAC Address, but which it did not send. In another embodiment, the NIC monitors for packets having its own IP address, but which it did not send. These falsely purportive packets originate not from the observant NIC, but suspiciously from elsewhere. Such suspect origins entities may be rogue entities attempting to gain unauthorized network access. These embodiments detect unauthorized access to a network by ascertaining the presence of spoofing activity in a manner that does not require gross revamping of network architecture or the burdening of network accessibility by legitimate authorized entities.