Patent ID: 7864772
Filing Date: 2011-01-04
Classification: H04L

Abstract:
1. A method of protecting by one or more proxies integrity of data packets of a transport layer connection, comprising: (a) receiving, by a first performance enhancing proxy, a data packet for a transport layer connection between an endpoint and a server, the data packet having a sequence number within a valid window of sequence numbers for the transport layer connection; (b) rotating, by the first performance enhancing proxy, the sequence number of the data packet to a value outside of the valid window of sequence numbers; (c) transmitting, by the first performance enhancing proxy, the data packet to the server; (d) receiving, by a second performance enhancing proxy, the data packet; (e) determining, by the second performance enhancing proxy, that the sequence number of the data packet falls outside the valid window of sequence numbers; and (f) derotating, by the second performance enhancing proxy, the rotated sequence number of the data packet.