Patent ID: 8190739
Filing Date: 2012-05-29
Classification: H04L,H04M

Abstract:
1. A computer-implemented method for lawfully intercepting communication IP packets exchanged between a first terminal having a first IP address and a second terminal having a second IP address, the first and second terminals connected via the Internet, the method comprising: a first equipment in a data network of a first communication service provider transmitting data to the first terminal useable to establish a communication tunnel between the data network and the first terminal, the data comprising a third IP address for use as a source IP address of the first terminal in a field of a session establishment message to be transmitted from the first terminal to establish communication between the first terminal and the second terminal, subsequently receiving in the data network via the communication tunnel the communication session establishment message from the first terminal, the field of the communication session establishment message comprising the third IP address, transmitting from the data network to the second terminal the session establishment message without modifying the field, subsequently receiving in the first equipment and/or a second equipment in the data network at least some of the communication IP packets from the second terminal having a destination IP address, the destination IP address being the third IP address; and intercepting the communication IP packets in the data network.