Systems, methods, and computer program products to perform an operation comprising obtaining a set of ports based on monitoring repeated attempts by a client application to establish a connection on ports signaled by a server application, establishing one or more secure connections between a client computer executing the client application to the server computer executing the server application based on the set of ports, opening each port of the set of ports to receive requests from the client application, listening on each of the set of ports for a first request from the client application to the server application, receiving, from the client application, the first request on a first port of the set of ports, and transmitting the first request to the server application.