Abstract: A method and system is disclosed for controlling packet communications between a first computer network and a second computer network. A driver module implemented in a first computer extracts information about an application session and a network address and port used by the first computer for sending packets of the application session to a second computer in the second computer network when the first computer initially determining a port for the application session. The driver module sends the extracted information to a gateway node of the first computer network, the gateway node being implemented with a server module and the gateway node monitoring one or more packets exchanging between the first and second computer networks. A look-up table is then established for recording the relation between the application and the network address and port used by the first computer for the application.

Abstract: A method and system is disclosed for dynamically managing port and network addresses for a private network using at least one dynamic port management (DPM) driver and a DPM server. The DPM driver is installed on a computer of the private network and the DPM server is installed on a gateway module of the private network. The private network uses a plurality of unregistered network address for its internal uses and has one or more registered network address for communicating with computers outside of the private network. When initiating an application session communicating with at least one computer outside of the private network, a first port is obtained from the DPM driver. A setup process is established for exchanging information between the DPM driver and the DPM server in order to reserve a registered network address and, if the first port is replaceable, for dynamically assigning a second port.

Abstract: A system for controlling an application process comprises an injector, redirect code operable to be placed in a memory of the application process, and a library of redirect functions operable to be referenced by the redirect code during the application process execution. The redirect code is operable to intercept a set of target function calls made by the application process and execute the redirect functions for the intercepted target function calls.