| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve security strength against unauthorized access or block by using a spoofed address.SOLUTION: A computer system comprises: a controller 2; a switch 33 for performing on a reception packet suitable for a flow entry set by the controller, a relay operation defined by the flow entry; and a host terminal 31 connected to the switch 33. The switch 33 notifies the controller 2 of transmission source address information of a reception packet which is not suitable for a flow entry set for the switch 33. The controller 2 determines when authorized address information of the host terminal 31 does not coincide with the transmission source address, that the transmission address of the reception packet is spoofed.</p> |
