Patent ID: 6662223
Filing Date: 2003-12-09
Classification: H04L

Abstract:
A method for authenticating response time requests issued from a source router by a destination router comprising the steps of:receiving, at a default responder port of the destination router, a control protocol message sent by the source router, the message comprising a Network Endpoint Connection Protocol (NECP) message encapsulating a Command Length Status Data (CLSD) message therein, and when the NECP message is unencrypted, accessing an Access Control List (ACL) to determine whether a specified client is authorized, based upon information in the ACL, to utilize the default responder port, and in response to receipt of the CLSD message, initiating, at the destination router, a listening process at a predetermined port thereon, the listening process including enabling a User Datagram Protocol (UDP) server process at the predetermined port; establishing a time limit for receiving a server request at the predetermined port at which time the predetermined port is enabled; and receiving the server request at the predetermined port when the server request is received while the predetermined port is enabled.