Systems and methods for improving the performance of a computer network using multiplexed application layer streams of network traffic

A system for improving performance of a computer network, the system comprising:

• a device intermediary to a client and a server, the device comprising a network interface configured to:
• receive multiplexed application layer streams of network traffic from the client to the server via a first transport control protocol (TCP) connection between the device and the client, the multiplexed application layer streams of network traffic including a first data packet with a first sequence number;
• and
• forward the first data packet with the first sequence number to the server via a second TCP connection between the device and the server;
• a ping frame generator configured to transmit, via the first TCP connection, a hypertext transfer protocol (HTTP) ping frame of an application layer protocol to the client to cause the client to increase a next sequence number used for the first TCP connection by a size of a data payload of the HTTP ping frame, wherein the network interface is further configured to:
• receive a HTTP ping response frame from the client, the HTTP ping response frame transmitted by the client responsive to the HTTP ping frame;
• and
• receive, via the first TCP connection, a second data packet from the client with the next sequence number comprising a second sequence number increased by the size of the data payload of the HTTP ping frame;
• and
• a sequence number adjuster configured to adjust the second sequence number of the second data packet to be a third sequence number expected by the second TCP connection between the device and the server, wherein the network interface is further configured to forward, via the second TCP connection, the second data packet having the third sequence number to the server.