| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a monitoring system capable of ensuring sufficient security with respect to an object of monitoring. SOLUTION: In the monitoring system monitoring illegal access to the object of monitoring, a computer for fire wall limits access to a control system from an information system and monitors an access route after a monitoring device passes through the computer for fire wall. Thus, an illegal access is blocked in two stages between the control system and the information system.</p> |
