Method for secure packet-based communication between two units via an intermedia unit

摘要

A method and system for packet based data communication between a first unit (1) and a second unit (3), wherein said first unit (1) communicate via an intermediate unit (2), each unit being identified by at least one address. The method comprises the steps of retrieving, at said first unit (1), from said intermediate unit (2) and address of said at least one address identifying said intermediate unit. The retrieved address is used as source address when forming a first data packet in said first unit (1). The data packet is tunneled from said first unit (1) to said intermediate unit (2) and then sent from said intermediate unit to said second unit.