| 摘要 |
A storage unit stores a correspondence between information indicating one or more services executable on one or more virtual machines and information indicating one or more users who use the services, and one or more communication monitoring rules to be used by one or more virtual routers. The rules are defined for each of the services. A control unit specifies, when a rule stored in the storing unit is changed, one or more of the users who use a service corresponding to the changed rule by referring to the storing unit. The control unit transmits the changed rule to one or more of the virtual routers which relay communication of one or more of the virtual machines assigned to the specified users so as to cause the one or more of the virtual routers, to which the changed rule is transmitted, to perform monitoring based on the changed rule. |
