RELAY DEVICE, NETWORK MONITORING SYSTEM, AND PROGRAM

WIPO Patent Application WO/2016/194123

A1

In the present invention, unauthorized access from outside a facility to a device disposed inside the facility is detected by effectively using the output from a mirror port of a network switch. A gateway device 10 has: a monitored data acquisition unit 15 for saving in a monitored data storage unit 19, as monitored data, packet data that is outputted from a mirror port of a switch, the packet data being outputted from a device being monitored; an unauthorized access detection unit 17 for detecting unauthorized access by determining whether the monitored data is abnormal on the basis of a comparison between the monitored data and assessment rules; and an unauthorized access notification unit 18 for notifying a server of a monitoring center, which is connected to an external network via an external communication unit 12, that unauthorized access has been detected.

KAWASAKI JIN (JP)
TABATA HIROYASU (JP)
YAMAGUCHI TERUYOSHI (JP)
KOBAYASHI NOBUHIRO (JP)

PCT/JP2015/065848

December 08, 2016

June 02, 2015

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MITSUBISHI ELECTRIC BUILDING TECHNO SERVICE CO LTD (JP)
MITSUBISHI ELECTRIC CORP (JP)

H04L12/66

JP2012169731A

2012-09-06

HIROSHI NISHIHARA: "Professional ni Manabu Enterprise Security", MONTHLY ASCII DOT TECHNOLOGIES, vol. 15, no. 9, 24 July 2010 (2010-07-24), pages 122 - 125, XP009504676

YKI Patent Attorneys (JP)
Patent business corporation YKI international patent firm (JP)

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