Patent ID: 7613195

Claim:
A telecommunication system comprising: a first network having a primary server and a first node with a first TCP/IP port and a second node, and a second network having a client server and a third node with a second TCP/IP port which can communicate with the first TCP/IP port, the first TCP/IP port and the second TCP/IP port having been predefined by an administrator, wherein the first TCP/IP port and the second TCP/IP port remain constant and cannot be changed unless both the client server and the primary server are physically changed; a communication portion in communication with the first network and the third node and through which the third node is only able to communicate with the first TCP/IP port of the first node via TCP/IP port extension using gateway methodology, such that the second node cannot be accessed by the third node; and wherein the system is configured such that the third node cannot utilize any port between the first node and the third node except for the first and second TCP/IP ports, the third node able to communicate with the second node only if the third node is allowed to by the first node which prevents an intruder who compromises the second network from gaining access to the first network except for the first TCP/IP port.