| 摘要 |
A device carries out a receiving process to receive a message transmitted or received by a server from a communication device connected to the server. The device stores the message in a message storing unit in connection with a time when the receiving process is carried out. The device extracts a message for synchronization from the message storing unit. The device produces log data including identification data to identify the message for synchronization and a time when the message for synchronization is received. The device produces log data including a time when a message other than the message for synchronization is received. The device stores the log data in a log data storing unit. The device transmits the log data stored in the log data storing unit to a log data processing device connected to a network on an opposite side of a firewall connected to the communication device.
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