| 摘要 |
PROBLEM TO BE SOLVED: To reduce the adverse effect on a communication network due to loop generation, without using a test frame.SOLUTION: A communication protection system includes a filter 11-1 for discarding the data of a specific source address, from among the data flowing from a second communication network 102 to a first communication network 101 for transmitting the data exchanged between the second communication network 102 and a third communication network 103, and a filter control unit 12 for acquiring the MAC address Mac_b of a terminal 13-2 for connection with the third communication network 103, and setting the MAC address Mac_b thus acquired, as a specific source address, to the filter 11-1. |
