Abstract: A firewall penetration scheme is described for communication between two networked computers. A first computer within a firewall protected network initiates a connection to a second computer. The second computer is coupled to a network of remote clients that are configured to access the first computer. The first computer transmits a message to the second computer commanding the second computer to connect back to the first computer A series of tests using communication protocols of increasing complexity are executed until a communication protocol enabling communication between the first and second computers is determined. If the address of the first computer changes upon connection, the second computer registers the new address upon each change. If the connection between the first computer and second computer is unintentionally broken, the first computer re-establishes contact with the second computer and maintains the connection by transmitting periodic signals to the second computer.