JP2015186164A - monitoring server, network monitoring system, network monitoring method and network monitoring program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a monitoring server, a network monitoring system, a network monitoring method and a network monitoring program, capable of automatically registering the information of a monitoring target terminal.SOLUTION: A monitoring server 1 includes: a monitoring target device information storage unit 17 which stores the setting registration information of the monitoring target device; an identification unit 15a which identifies, based on a predetermined notification received from a newly connected monitoring target device, whether the device is a monitor target device in a network managed by the monitoring server; and a registration confirmation unit 15b which confirms whether or not the transmission source monitoring target device of the predetermined notification is already registered, depending on whether or not the transmission source specific information of the predetermined notification is coincident with specific information which is included in the setting registration information of the monitoring target device information storage unit.

Description

  The present invention relates to a monitoring server, a network monitoring system, a network monitoring method, and a network monitoring program for monitoring a network.

  The network monitoring system is a system for monitoring a monitoring target terminal to be monitored via a network, and setting of an L2 switch, an L3 switch, or the like of a monitoring target device at the time of network construction or subsequent communication Manage the entire network by monitoring the status. The network monitoring system groups devices to be monitored for each predetermined area, and connects the networks of these groups via a bus line or the like. As a result, a huge network of hundreds or tens of thousands of scales is built nationwide or around the world.

  When the network is changed or expanded, the maintenance worker needs to additionally register information on the monitoring target device in the network monitoring system. At this time, if the information on the monitoring target device is not correctly registered and the information on the monitoring target device registered in the network monitoring system does not match the information included in the monitoring target device, the monitoring target device cannot be correctly monitored. As the network becomes larger, the number of devices to be monitored increases, and accordingly, there is a high possibility that the maintenance worker will make an input mistake in the registration work to the network monitoring system. For this reason, a technique is disclosed that can be automatically registered in the network by a program instead of the maintenance worker.

  For example, OSPF (Open Shortest Path First) is adopted as a path control protocol, and a device to be monitored is specified by detecting an adjacent device using the LLDP (Link Layer Discovery Protocol) protocol, and the device A method for automatically acquiring information to be registered is disclosed (see Patent Document 1).

  Also, a technique is disclosed in which the monitoring server performs broadcast transmission to all the monitoring target devices and receives the reply message to detect the address of the monitoring target device (see Patent Document 2).

JP 2012-134616 A JP-A-9-172433

  In the method described in Patent Document 1, in order to automatically register with the monitoring server, the monitoring target device creates a unique message defined for the registration request and transmits it to the monitoring server. The monitoring server has received this unique message, and it has been necessary to register information on the monitoring target device based on the received unique message. That is, it is necessary to send and receive messages for registration.

  In the method described in Patent Document 2, the monitoring server performs broadcast distribution of an empty message or the like to all the devices connected to the network, and the device connected to the network returns this message. The monitoring server needs to detect the address or the like of the monitoring target device based on the reply message and register the detected address or the like. That is, it is necessary to send and receive messages for registration.

  The present invention has been made in view of the above problems, and a monitoring server, a network monitoring system, a network monitoring method, and a network monitoring that automatically register information of a monitoring target terminal without transmitting / receiving a message for registration. The purpose is to provide a program.

  In view of the above problems, a first feature of the present invention is a monitoring server that is communicably connected to a plurality of monitoring target devices, and stores the setting registration information of each of the monitoring target devices. An information storage unit, an identification unit for identifying whether the device is a monitoring target device in the network managed by the monitoring server, based on a predetermined notification received from a newly connected monitoring target device, and transmission of the predetermined notification Registration for confirming whether or not the transmission source monitoring target device of the predetermined notification has been registered based on whether or not the original identification information matches the specific information included in the setting registration information of the monitoring target device information storage unit The gist is that the monitoring server includes a confirmation unit.

  A second feature of the present invention includes the monitoring server described above and the monitoring target device, and the monitoring target device newly added to the network managed by the monitoring server is connected to the monitoring server. The gist of the present invention is a network monitoring system that transmits a predetermined notification.

  According to a third aspect of the present invention, there is provided a network monitoring method for monitoring a network by a monitoring server that is communicably connected to a plurality of devices to be monitored, the setting registration information of each of the devices to be monitored being monitored A step of storing in the device information storage unit, a step of identifying whether the device is a monitoring target device in the network managed by the monitoring server, based on a predetermined notification received from a newly connected monitoring target device, and the predetermined Whether or not the transmission source monitoring target device of the predetermined notification has been registered, whether or not the transmission source identification information of the notification matches the specific information included in the setting registration information of the monitoring target device information storage unit And a network monitoring method having a step of confirming

  A fourth feature of the present invention is a network monitoring program for monitoring a network by a monitoring server that is communicably connected to a plurality of monitoring target devices, and the setting registration information of each of the monitoring target devices is monitored A procedure for storing in the device information storage unit, a procedure for identifying whether the device is a monitoring target device in a network managed by the monitoring server, based on a predetermined notification received from a newly connected monitoring target device, and the predetermined Whether or not the transmission source monitoring target device of the predetermined notification has been registered, whether or not the transmission source identification information of the notification matches the specific information included in the setting registration information of the monitoring target device information storage unit And a network monitoring program for causing a computer to function each procedure of the system.

  According to the monitoring server, the network monitoring system, the network monitoring method, and the network monitoring program according to the present invention, it is possible to automatically register the information of the monitoring target terminal without transmitting / receiving a message for registration.

1 is a configuration diagram of a network monitoring system according to a first embodiment. It is an internal block diagram of a monitoring server. It is a figure which shows the internal data structure of the monitoring object apparatus information storage part. It is a figure which shows the naming structure of position information. It is a table figure which shows the table and displacement of MIB. It is an internal block diagram of a monitoring object apparatus. It is a figure which shows the internal data structure of a setting information storage part. It is a flowchart which shows operation | movement of the monitoring object apparatus. It is a flowchart which shows operation | movement of a monitoring server. It is a block diagram of the network monitoring system which concerns on 2nd embodiment.

Next, embodiments of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic. Furthermore, it should be noted that the embodiment described below is an example, and can be appropriately changed within the scope of the same essence.
<First embodiment>
(Network monitoring system)
As shown in FIG. 1, the network monitoring system 100 according to the first embodiment of the present invention includes a monitoring server 1 and a plurality of monitoring target devices 2a, 2b, 2c, 2d, 2e, and 2f. The monitoring server 1 and each of the monitoring target devices 2a to 2f are connected by a line network 3 such as an intranet or the Internet. If the network is huge, a plurality of monitoring servers 1 may exist. The monitoring target devices 2a to 2f are communication devices installed in each region, and there are at least one or more in the same region. For convenience of explanation, it is assumed that the monitoring target terminals 2a and 2b belong to the A area, the monitoring target terminals 2c and 2d belong to the B area, and the monitoring target terminals 2e and 2f belong to the C area. Each of the monitoring target terminals 2a to 2f includes a plurality of node terminals (not shown) in each area, and manages their communication via a network.
(Monitoring server)
As shown in FIG. 2, the monitoring server 1 includes an input device 11, an output device 12, a communication device 13, a temporary storage device 14, a CPU (Central Processing Unit) 15, a reception information storage unit 16, a monitoring target device information storage unit 17, and A position conversion information storage unit 18 and the like are provided. The CPU 15 includes a monitoring target device identification unit 15a, a registration confirmation unit 15b, an information search unit 15c, a device information acquisition unit 15d, a position information conversion unit 15e, a position information registration unit 15f, and the like. Each of these units represents a functional block of a program that is arithmetically processed by the CPU 15.

  The reception information storage unit 16 stores data such as trap notifications to be received.

  The monitoring target device information storage unit 17 stores setting registration information created based on the basic setting information of the monitoring target devices 2a to 2f. The setting registration information includes an IP address or the like as specific information that can uniquely identify the monitoring target devices 2a to 2f. For example, as shown in FIG. 3, the monitoring target device information storage unit 17 stores “IP (Internet Protocol) address”, “device name”, “location information”, “other related information”, and the like.

  The position conversion information storage unit 18 stores a naming rule for the position information of the monitoring target devices 2a to 2f under the management of the monitoring server 1 and a position conversion table for converting the position information into Japanese. As an example of the naming convention, as shown in FIG. 4, the first 2 bytes of information is “region”, the first 3 to 5 bytes of information are “prefecture name”, and the first 6 to 9 bytes of information are “location”. "The 10th byte and after are set as" other additional information ". In this rule, the region is a numerical code of 00 to 99, the prefecture name is a numerical code of 000 to 999, the location is a numerical code of 0000 to 9999, and other additional information is a character string code AZ, az, and It consists of numerical codes 0-9. The position conversion table is a table in which numerical codes indicating “region”, “prefecture name”, and “location” and Japanese corresponding thereto are arranged. For example, region 01 is defined as “Kanto”, prefecture name 001 as “Tokyo”, and location 0001 as “Chiyoda-ku Ichibanchi”.

  The communication device 13 controls communication according to a specified communication interface. In this embodiment, RFC (Request For Comment) 1213 “Management Information Base for Network Management of TCP / IP-based internets” is adopted as the specification of the communication interface, and a standard MIB (Management Information Base) standardized by RFC 1213, Private MIB, CLI (Command Line Interface) commands, etc. are provided. Common MIB types include “sysDescr”, “sysObjectID”, “sysContact”, “sysName”, and “sysLocation” as shown in FIG. Among these, “sysObjectID” is a table showing what kind of network management subsystem is included, and this table allows you to easily and accurately check which monitored server is managed under which management server. it can.

  The monitoring target device identification unit 15a is the monitoring target devices 2a to 2f in the network managed by the monitoring server 1 based on a predetermined notification received from the newly connected monitoring target devices 2a to 2f, for example, a trap notification. Judge.

  The registration confirmation unit 15b determines whether the IP address of the monitoring target device is registered in the monitoring target device information storage unit 17 based on the source identification information of the trap notification, for example, the transmission source IP address.

  The information search unit 15c searches the basic setting information of the unregistered monitoring target device based on the transmission source IP address of the trap notification.

  The device information acquisition unit 15d acquires the searched basic information, and stores information such as the IP address, device name, and position information included in the acquired basic setting information in the monitoring target device information storage unit 17.

  The position information conversion unit 15 e converts the position information included in the basic setting information into Japanese based on the position conversion table stored in the position conversion information storage unit 18. The location information registration unit 15 f stores the converted Japanese location information in the monitoring target device information storage unit 17.

The input device 11 indicates a keyboard, a mouse for inputting data, an input port for inputting data from the outside, and the like. The output device 12 indicates an image device or a printing device for displaying data, a port for outputting data to the outside, or the like. The temporary storage device 14 is a RAM (Random Access Memory) or the like for temporarily storing data processed by the CPU 15. In FIG. 2, each of the units 15a to 15f, which are functional blocks, is stored in the CPU 15, but may be stored in a ROM (Read Only Memory) or a RAM. Each function is executed by the CPU 15 appropriately reading each unit 15a to 15f and performing arithmetic processing.
(Monitored device)
As shown in FIG. 6, the monitoring target devices 2a to 2f include an input device 21, an output device 22, a communication device 23, a temporary storage device 24, a CPU 25, a setting information storage unit 26, and the like. The CPU 25 includes a basic setting information management unit 25a, a data communication setting information management unit 25b, a trap notification transmission unit 25c, and the like.

  The communication device 23 controls communication according to a specified communication interface. The communication device 23 includes a standard MIB, a private MIB, a CLI command, and the like standardized by RFC1213 as communication interface specifications.

  The setting information storage unit 26 stores basic setting information and data communication setting information of the monitoring target devices 2a to 2f shown in FIG. The basic setting information includes information such as “device name”, “device IP address”, “authentication method”, “communication protocol”, “device account information”, “monitoring server address”, and “location information”. The data communication setting information includes information such as “path setting”, “bandwidth control”, and “line quality”.

The basic setting information management unit 25a performs new registration, update, deletion, and the like of basic setting information.
The data communication setting information management unit 25b performs new registration, update, deletion, etc. of the data communication setting information.

  The trap notification transmission unit 25c transmits a trap notification for notifying completion of device setting to the monitoring server 1 when a new monitoring target device is additionally installed in the network managed by the monitoring server 1. The trap notification is always notified when the device setting is completed, and is different from the case where the new monitoring target device 2g creates and transmits a unique message for a registration request to the monitoring server 1. There are various types of trap notifications, which are actively transmitted to the monitoring server 1 when an abnormality is detected on the monitoring target devices 2a to 2f side.

The other devices are the same as those shown in FIG.
(Operation of network monitoring system)
Next, the operation of the network monitoring system 100 will be described. In the following description, an operation in the case where a monitoring target device 2g (not shown) is newly added to the network in the A area as the line in the A area in FIG. 1 increases will be described. Note that, when the monitoring target devices 2a to 2f are deleted from the network, only the registration information in the monitoring target device information storage unit 17 is deleted, and there are few operation errors. Therefore, the description is omitted in this embodiment.

First, the operation of the new monitoring target terminal 2g will be described with reference to the flowchart of FIG.
(A) First, in step S110, the basic setting information management unit 25a of the new monitoring target terminal 2g displays basic setting information necessary for connection with the monitoring server 1 and data communication setting information necessary for data communication as a setting information storage unit. 26. As a premise, the communication device 23 of the new monitoring target device 2g includes a standard MIB, a private MIB, a CLI command, and the like.
(B) When the network operator and the new monitoring target terminal 2g are connected and activated by the maintenance worker in step S120, the trap notification transmission unit 25c completes the setting of the new monitoring target terminal 2g to the monitoring server 1. Send a trap notification to inform you. This trap notification includes the IP address of the new monitoring target terminal 2g as a transmission source address.

Next, the operation of the monitoring server 1 that receives the trap notification will be described with reference to the flowchart of FIG.
(A) In step S210, the monitoring server 1 receives the trap notification via the network 3. In step S220, the monitoring target device identification unit 15a searches for the monitoring target device 2g based on the transmission source IP address of the trap notification. When the monitoring target device 2g is found as a result of the search, the “sysObjectID” in FIG. 5 included in the standard MIB of the monitoring target device 2g is read to determine whether the monitoring target device is a monitoring target device in the network managed by the monitoring server 1. . If it is determined that the device is a monitoring target device, the process proceeds to step S230. If it is determined that the device is not a monitoring target device, it is stored in the reception information storage unit 16 as a simple trap notification in step S280, and the process returns to step S210.
(B) Next, in step S230, the registration confirmation unit 15b has already registered the transmission source IP address of the trap notification as the monitoring target device IP address in the setting registration information stored in the monitoring target device information storage unit 17. Determine whether or not. If it is determined that it is not registered, the process proceeds to step S240. If it is determined that it has been registered, it is stored in the received information storage unit 16 as a simple trap notification in step S280, and the process returns to step S210.
(C) In step S240, the information retrieval unit 15c retrieves the basic setting information (see FIG. 7) of the unregistered monitoring target device 2g via the network 3 based on the transmission source IP address of the trap notification. . In step S250, the device information acquisition unit 15d acquires the searched basic information, and stores the IP address, device name, position information, and the like included in the acquired basic setting information in the monitoring target device information storage unit 17 as setting registration information. Store.
(D) In step S260, the position information conversion unit 15e acquires the position information of the setting registration information, and converts it into a Japanese name using the position conversion table stored in the position conversion information storage unit 18. In step S270, the location information registration unit 15f stores the converted Japanese location information in the monitoring target device information storage unit 17 as setting registration information.

As described above, according to the first embodiment of the present invention, the monitoring target device identification unit reads out the sysObjectID that is the source of the trap notification, and determines whether or not the monitoring target device is in the network managed by the monitoring server. In addition, the information search unit and the device information acquisition unit register information on the monitoring target device added in the network. Thereby, the information of the added monitoring target apparatus can be automatically registered without transmitting / receiving a message for newly registering the monitoring target apparatus.
Further, the position information conversion unit automatically converts and registers the position information of the monitoring target terminal into Japanese. Thereby, an input mistake by the maintenance worker can be prevented and the input time can be shortened. Furthermore, it becomes easy for the maintenance worker to confirm the position information.
<Second Embodiment>
The network monitoring system 200 according to the second embodiment of the present invention includes a monitoring server 4 as shown in FIG. The monitoring server 4 is connected to be able to communicate with a plurality of monitoring target devices. The monitoring server 4 includes a monitoring target device information storage unit 4a, an identification unit 4b, a registration confirmation unit 4c, and the like.

  The monitoring target device information storage unit 4a stores setting registration information of each of the monitoring target devices. The identification unit 4b identifies whether the device is a monitoring target device in the network managed by the monitoring server, based on a predetermined notification received from the newly added monitoring target device. The registration confirmation unit 4c registers the transmission source monitoring target device of the predetermined notification depending on whether or not the transmission source identification information of the predetermined notification matches the specific information included in the setting registration information of the monitoring target device information storage unit. Check if it is done.

  According to the second embodiment of the present invention, it is possible to automatically register the information of the added monitoring target device without transmitting / receiving a message for newly registering the monitoring target device.

A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.
[Appendix 1]
A monitoring server connected to a plurality of monitored devices so as to be communicable,
A monitoring target device information storage unit that stores setting registration information of each of the monitoring target devices;
Based on a predetermined notification received from a newly connected monitoring target device, an identification unit for identifying whether the monitoring target device is in the network managed by the monitoring server;
Whether the transmission source monitoring target device of the predetermined notification has been registered based on whether or not the transmission source identification information of the predetermined notification matches the specific information included in the setting registration information of the monitoring target device information storage unit A monitoring server comprising a registration confirmation unit for confirming whether or not.
[Appendix 2]
When the registration confirmation unit determines that the information has not been registered, the setting information of the unregistered monitoring target device is searched based on the transmission source identification information of the predetermined notification, and the searched setting registration information is used as the monitoring target device. The monitoring server according to appendix 1, further comprising a device information acquisition unit stored in the information storage unit.
[Appendix 3]
The monitoring server according to appendix 1 or 2, wherein the communication between the monitoring target device and the monitoring server uses a standard management information base format of RFC standard.
[Appendix 4]
The identification unit identifies whether the device is a monitoring target device in a network managed by the monitoring server, based on a system object ID in the standard management information base format included in the predetermined notification. The monitoring server according to any one of appendices 1 to 3.
[Appendix 5]
The monitoring server according to any one of appendices 1 to 4, and
Comprising the monitored device;
A network monitoring system, wherein a monitoring target device newly added in a network managed by the monitoring server transmits a predetermined notification to the monitoring server.
[Appendix 6]
A network monitoring method for monitoring a network by a monitoring server connected to be able to communicate with a plurality of monitoring target devices,
Storing the setting registration information of each of the monitoring target devices in a monitoring target device information storage unit;
Identifying whether the device is a monitoring target device in a network managed by the monitoring server, based on a predetermined notification received from a newly connected monitoring target device;
Whether the transmission source monitoring target device of the predetermined notification has been registered based on whether or not the transmission source identification information of the predetermined notification matches the specific information included in the setting registration information of the monitoring target device information storage unit And a step of confirming whether or not the network monitoring method.
[Appendix 7]
When it is determined that the registration is not completed in the checking step, the setting information of the unregistered monitoring target device is searched based on the transmission source specifying information of the predetermined notification, and the searched setting registration information is used as the monitoring target device. The network monitoring method according to appendix 6, further comprising a step of storing in an information storage unit.
[Appendix 8]
The network monitoring method according to appendix 6 or 7, wherein communication between the monitoring target device and the monitoring server uses a standard management information base format of RFC standard.
[Appendix 9]
The identifying step identifies whether the device is a monitoring target device in the network managed by the monitoring server based on a system object ID in the standard management information base format included in the predetermined notification. The network monitoring method according to any one of appendices 6 to 8.
[Appendix 10]
A network monitoring program for performing network monitoring by a monitoring server connected to be able to communicate with a plurality of monitoring target devices,
A procedure for storing the setting registration information of each of the monitoring target devices in the monitoring target device information storage unit;
A procedure for identifying whether a monitoring target device is in a network managed by the monitoring server based on a predetermined notification received from a newly connected monitoring target device;
Whether the transmission source monitoring target device of the predetermined notification has been registered based on whether or not the transmission source identification information of the predetermined notification matches the specific information included in the setting registration information of the monitoring target device information storage unit A network monitoring program for causing a computer to function each procedure of the system.
[Appendix 11]
When the registration confirmation unit determines that the information has not been registered, the setting information of the unregistered monitoring target device is searched based on the transmission source identification information of the predetermined notification, and the searched setting registration information is used as the monitoring target device. Item 11. The network monitoring program according to appendix 10, which causes the computer to further function in the procedure of storing in the information storage unit.
[Appendix 12]
12. The network monitoring program according to appendix 10 or 11, wherein communication between the monitoring target device and the monitoring server uses a standard management information base format of RFC standard.
[Appendix 13]
The identifying step identifies whether the device is a monitoring target device in the network managed by the monitoring server, based on a system object ID in the standard management information base format included in the predetermined notification. The network monitoring program according to any one of supplementary notes 10 to 12.

1, 4 Monitoring server 11 Input device 12 Output device 13 Communication device 14 Temporary storage device 15 CPU
15a Monitoring target device identification unit 15b Registration confirmation unit 15c Information retrieval unit 15d Device information acquisition unit 15e Location information conversion unit 15f Location information registration unit 16 Reception information storage unit 17 Monitoring target device information storage unit 18 Location conversion information storage unit 2a, 2b 2c, 2d, 2e, 2f, 2g Monitoring target device 21 Input device 22 Output device 23 Communication device 24 Temporary storage device 25 CPU
25a Basic setting information management unit 25b Data communication setting information management unit 25c Trap notification transmission unit 26 Setting information storage unit 3 Network 100, 200 Network monitoring system

Claims (10)

A monitoring server connected to a plurality of monitored devices so as to be communicable,
A monitoring target device information storage unit that stores setting registration information of each of the monitoring target devices;
Based on a predetermined notification received from a newly connected monitoring target device, an identification unit for identifying whether the monitoring target device is in the network managed by the monitoring server;
Whether the transmission source monitoring target device of the predetermined notification has been registered based on whether or not the transmission source identification information of the predetermined notification matches the specific information included in the setting registration information of the monitoring target device information storage unit A monitoring server comprising a registration confirmation unit for confirming whether or not.   When the registration confirmation unit determines that the information has not been registered, the setting information of the unregistered monitoring target device is searched based on the transmission source identification information of the predetermined notification, and the searched setting registration information is used as the monitoring target device. The monitoring server according to claim 1, further comprising a device information acquisition unit stored in the information storage unit.   The monitoring server according to claim 1 or 2, wherein the communication between the monitoring target device and the monitoring server uses a standard management information base format of RFC standard.   The identification unit identifies whether the device is a monitoring target device in a network managed by the monitoring server, based on a system object ID in the standard management information base format included in the predetermined notification. The monitoring server according to any one of claims 1 to 3. The monitoring server according to any one of claims 1 to 4,
Comprising the monitored device;
A network monitoring system, wherein a monitoring target device newly added in a network managed by the monitoring server transmits a predetermined notification to the monitoring server. A network monitoring method for monitoring a network by a monitoring server connected to be able to communicate with a plurality of monitoring target devices,
Storing the setting registration information of each of the monitoring target devices in a monitoring target device information storage unit;
Identifying whether the device is a monitoring target device in a network managed by the monitoring server, based on a predetermined notification received from a newly connected monitoring target device;
Whether the transmission source monitoring target device of the predetermined notification has been registered based on whether or not the transmission source identification information of the predetermined notification matches the specific information included in the setting registration information of the monitoring target device information storage unit And a step of confirming whether or not the network monitoring method.   When it is determined that the registration is not completed in the checking step, the setting information of the unregistered monitoring target device is searched based on the transmission source specifying information of the predetermined notification, and the searched setting registration information is used as the monitoring target device. The network monitoring method according to claim 6, further comprising a step of storing in the information storage unit. 8. The network monitoring method according to claim 6, wherein communication between the monitoring target device and the monitoring server uses a standard management information base format of RFC standard. 9. A network monitoring program for performing network monitoring by a monitoring server connected to be able to communicate with a plurality of monitoring target devices,
A procedure for storing the setting registration information of each of the monitoring target devices in the monitoring target device information storage unit;
A procedure for identifying whether a monitoring target device is in a network managed by the monitoring server based on a predetermined notification received from a newly connected monitoring target device;
Whether the transmission source monitoring target device of the predetermined notification has been registered based on whether or not the transmission source identification information of the predetermined notification matches the specific information included in the setting registration information of the monitoring target device information storage unit A network monitoring program for causing a computer to function each procedure of the system.   When the registration confirmation unit determines that the information has not been registered, the setting information of the unregistered monitoring target device is searched based on the transmission source identification information of the predetermined notification, and the searched setting registration information is used as the monitoring target device. The network monitoring program according to claim 9, further causing a computer to function a procedure stored in the information storage unit.

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