Patent ID: 8677478
Filing Date: 2014-03-18
Classification: H04L

Abstract:
1. A method for removing authentication of a supplicant comprising: monitoring, by an intermediate network device, communication between the supplicant and an authenticator, the supplicant coupled to an attachment port of the intermediate network device, the intermediate network device disposed between the supplicant and the authenticator, the communication between the supplicant and the authenticator passing through the intermediate network device; determining, by the intermediate network device based on the monitored communication, the MAC address for the supplicant and the attachment port of the intermediate network device; and determining, by the intermediate network device, that the supplicant no longer has a link connection with the intermediate network device, and in response, preventing, by the intermediate network device, a subsequent unauthenticated device from attaching to the attachment port of the intermediate network device by sending by the intermediate network device a logoff message having a spoofed source address of the supplicant to the authenticator, the logoff message being sent after the link connection between the supplicant and the intermediate network device is lost.