| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique that avoids leaking path information on a communication network.SOLUTION: An I-CSCF #2 comprises: a correspondence relation table 11 that associates and stores path information indicating a path of a communication signal in an in-zone network with a dummy value indicating the path information; a transmission processing unit 12 that, when a communication signal received from within the communication network is transmitted to an external network, replaces path information indicating a path of the communication signal in the communication network included in the communication signal with a dummy value, and associates and stores the path information with the dummy value in the correspondence relation table 11; and a reception processing unit 13 that, when a communication signal received from the external network is transmitted to within the communication network, reads out path information corresponding to a dummy value included in the communication signal from the correspondence relation table 11, and replaces the dummy value of the communication signal with the path information. |
