1. A method to identify flow control modules of a flow control system using packets traversing the flow control modules and transmitted between a source node and a destination node, the method comprising: inserting, at a first flow control module configured on a first intermediary device, a first configuration identifier into an options area of a header of a first transmission control protocol (“TCP”) data packet transmitted from a source node to initiate synchronization of a session with a destination node, the first configuration identifier identifying that the first intermediary device is configured with the first flow control module; extracting, at the first flow control module, a second configuration identifier from an options area of a header of a second TCP data packet, transmitted from the destination node to initiate acknowledgement of synchronization of the session responsive to receiving the first data packet, the second configuration identifier identifying that a second intermediary device is configured with a second flow control module; and applying, by the first flow control module, at least one performance enhancing technique of increasing a window scale to communications between the first intermediary device and the second intermediary device to increase data buffering capabilities of the session, responsive to the presence of the second configuration identifier in the second TCP data packet.