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:
Nov. 24, 2009
Filed:
Dec. 04, 2003
Brian Francis Cox, Redwood City, CA (US);
Bruce Mcmurdo, San Jose, CA (US);
Venkateswara Rao Yarlagadda, Bangalore, IN;
Brian Francis Cox, Redwood City, CA (US);
Bruce McMurdo, San Jose, CA (US);
Venkateswara Rao Yarlagadda, Bangalore, IN;
Cisco Technology, Inc., San Jose, CA (US);
Abstract
The present invention provides a technique for securely implementing port-based authentication on a shared media port in an intermediate node, such as a router. To that end, the invention provides enhanced port-based network access control that includes client-based control at the shared media port. Unlike previous implementations, the port does not permit multiple client nodes to access a trusted subnetwork as soon as a user at any one of those nodes is authenticated by the subnetwork. Instead, port-based authentication is performed for every client node that attempts to access the trusted subnetwork through the shared media port. As such, access to the trusted subnetwork is not compromised by unauthenticated client nodes that 'piggy-back' over the shared media port after a user at another client node has been authenticated by the trusted subnetwork.