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:
Mar. 02, 2021
Filed:
Oct. 09, 2018
Colortokens, Inc., Santa Clara, CA (US);
Natarajan Venkataraman, Bangalore, IN;
COLORTOKENS, INC., Santa Clara, CA (US);
Abstract
Whenever an IP packet is routed from a source computing device through to a NAT device on the way to a destination computing device, a PCP client transmits a PCP query to a PCP server to determine the external IP address and external port number that have been substituted for the source IP address and source port number previously incorporated within the IP packet. Subsequently, the PCP server responds to the PCP client with the information denoting the mapping between the source IP address-some port number pair and the external IP address-external port number pair. A snooping agent is utilized to firstly snoop on the mapping communicated from the PCP server to the PCP client, and secondly to communicate the mapping information to a policy server incorporating a plurality of predefined firewall rules usable in deducing appropriate PACKET ALLOW/PACKET DROP decisions, based on the mapping information.