Patent ID: 8245288
Filing Date: 2012-08-14
Classification: H04L

Abstract:
1. A method for secure communications between a first device and a second device in a data communications system, the method comprising: receiving by the second device from the first device an Internet Key Exchange standard (IKE) key management packet communicated according to Uniform Datagram Protocol (UDP) as a part of IKE negotiations for establishing secure communications between the first device and the second device in a packet-based data communications system where a network address translation is possible between the first device and the second device and the first device has set a destination port field in the IKE key management packet to a standard port number for IKE; determining and saving by the second device a UDP source port of the received IKE key management packet; and sending a data packet using the UDP port number and Internet Protocol (IP) address of the first device determined during the IKE negotiations, wherein the destination port field of the data packet is set to the port number from which the first device appears to be sending packets.