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:
Oct. 11, 2011
Filed:
Dec. 24, 2002
Applicant:
Steven Michael Bellovin, Westfield, NJ (US);
Inventor:
Steven Michael Bellovin, Westfield, NJ (US);
Assignee:
AT&T Intellectual Property II, LP, Atlanta, GA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 15/173 (2006.01); H04L 5/22 (2006.01); H04J 3/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention is a method and apparatus for counting the number of active hosts behind network address translation boxes. The technique is based on the observation that on many operating systems, the IP header's ID field is a simple counter. By suitable processing of trace data, packets emanating from individual machines can be isolated, and the number of machines determined.