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:
Feb. 15, 2011
Filed:
Aug. 28, 2009
Stacey C. Lum, Los Altos, CA (US);
Stacey C. Lum, Los Altos, CA (US);
InfoExpress, Inc., Mountain View, CA (US);
Abstract
Systems and methods of managing security on a computer network are disclosed. The computer network includes a restricted subnet and a less-restricted subnet. Access to the restricted subnet is controlled by a network filter, optionally inserted as a software shim on a DHCP server. In some embodiments, the network filter is configured to manipulate relay IP addresses to control whether the DHCP server provides, in a DHCPOFFER packet, an IP address that can be used to access the restricted subset. In some embodiments, configuration information is communicated between the DHCP server and the network filter via DHCPOFFER packets.