Monitoring device and monitoring method

A technology for monitoring devices and communication devices, which is applied in digital transmission systems, electrical components, transmission systems, etc., and can solve problems such as increased loads on monitoring devices

Inactive Publication Date: 2016-01-13
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, when the scale of the network serving as a target for the detection of unauthorized access is large, the load on the monitoring device increases, so that there are transmissions and Received packets for analysis

Method used

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  • Monitoring device and monitoring method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0067] In the following, a description is given of an example of detection of unauthorized access by the monitoring devices 30, which is divided into detection of communication in the monitoring target by each of the monitoring devices 30, and using Notification of communication status against detection of unauthorized access. In the following description, a letter assigned to a device performing an operation is appended to a reference numeral of a device in order to facilitate distinction of a device performing a process. For example, the acquisition unit 34a indicates the acquisition unit 34 included in the monitoring device 30a.

[0068] (1) Detection of communication in the monitoring target by each monitoring device 30

[0069] First, in the company network 1 including the communication device 10a and the communication device 10d, the communication device 10a starts communication with the communication device 10d. When the communication device 10a transmits and receives...

no. 2 approach

[0125] In the second embodiment, a description is given of an example of processing performed when acquisition of a status notification message is ended due to the monitoring device 10 that is the monitoring destination of the monitoring device 30 ending communication. Note that, in the following description, the company network 1 and devices included in the external network, and the connection relationship between the communication device 10 and the monitoring device 30 and the like are the same as in the first embodiment. Therefore, the communication devices 5 a to 5 c are devices not included in the company network 1 . In the initial stage, as Figure 18 As shown, monitoring device 30a holds T30a-18, monitoring device 30c holds T30c-18, and monitoring device 30d holds T30d-18. The monitoring device 30b holds Figure 16 Information shown in T30b-12.

[0126] (1) The communication with the device other than the company network 1 is completed

[0127] Figure 22 is a sequ...

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Abstract

A monitoring device to operate as a first monitoring device in a network including communication devices and monitoring devices, the monitoring device includes: an acquisition unit to acquire information of packets transmitted or received by a first communication device monitored by the first monitoring device; a transmission unit to transmit a first join request message to a first multicast group in which a second monitoring device performs notification of communication information of a second communication device monitored by the second monitoring device, when the first communication device communicates with the second communication device, after the first communication device communicates with an external device not included in the network; and a determination unit to determine whether the external device is performing unauthorized access to the second communication device via the first communication device, based on packets transmitted from the second monitoring device to the first multicast group.

Description

technical field [0001] Embodiments discussed herein relate to monitoring apparatus and monitoring methods for monitoring communications made between multiple networks. Background technique [0002] In a local area network (LAN) such as a corporate network, there are cases where a monitoring device analyzes packets sent and received by each communication device in the network in order to detect unauthorized access by devices not included in the LAN . In this case, when the scale of the network serving as a target for the detection of unauthorized access is large, the load on the monitoring device increases, so that there are transmissions and The received packet is analyzed. When a plurality of monitoring devices are used, it is possible to detect unauthorized access to the network using analysis results obtained by all of the monitoring devices by exchanging the analysis results among all the monitoring devices. [0003] figure 1 An example of a network is shown. The co...

Claims

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Application Information

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IPC IPC(8): H04L12/26H04L45/16
CPCH04L43/50H04L12/185H04L63/1408
Inventor 加古镇治
Owner FUJITSU LTD
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