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:
Apr. 21, 2015
Filed:
Nov. 18, 2009
Robert Batz, Raleigh, NC (US);
Robert Mackie, Cary, NC (US);
Robert Batz, Raleigh, NC (US);
Robert Mackie, Cary, NC (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A method is provided in one example and includes receiving a first packet associated with a domain name system (DNS) exchange between a subscriber and a DNS server. A correlation is maintained between a domain name and an Internet protocol (IP) address included in a DNS response. A subsequent packet associated with a subsequent flow is received and the IP address is identified within the subsequent packet. The method further includes executing a policy decision for the subsequent flow based on the correlation between the IP address and the domain name. In more specific embodiments, the correlation is stored in a table that includes a time to live (TTL) parameter associated with the IP address. The IP address within the subsequent packet can be mapped to the domain name in order to apply the policy decision for the subsequent flow.