JP5245906B2 - DEVICE MANAGEMENT DEVICE, DEVICE MANAGEMENT SYSTEM, DEVICE MANAGEMENT METHOD, DEVICE MANAGEMENT PROGRAM, AND RECORDING MEDIUM CONTAINING THE PROGRAM - Google Patents

Description

  The present invention relates to a device management apparatus and a device management system that manage one or more devices connected via a data transmission path such as a network, and in particular, which device information is among the devices to be managed. This is related to the technology for identifying whether the product is a product.

  Systems for monitoring the status of MFPs (Multifunction Peripheral) and image processing devices such as printers via device data transmission devices such as networks are already known, and users are subject to management. It is possible to detect (know) an abnormality of a managed device without going to the device (hereinafter referred to as “managed device”) by itself.

  For example, in Patent Document 1, in the device management system, the communication load related to information acquisition can be reduced by properly using Trap and polling, which are methods by which the device management apparatus acquires device information from managed devices. A device management apparatus is disclosed.

  As described above, there are two methods by which the device management apparatus acquires device information: Trap and polling.

  Trap means that a device to be managed acquires device information by transmitting device information when the device to be managed itself satisfies a predetermined condition (for example, “occurrence error” or “device state”). Is. That is, the agent voluntarily notifies the manager of information. On the other hand, in the polling, the device management apparatus makes a device information acquisition request to the management target device, thereby receiving a response from the management target device, and the device management apparatus acquiring the device information. That is, the manager periodically sends a request, and the agent responds to it.

  However, in the conventional device management, when the device management apparatus acquires device information by Trap, there is a case where it is not possible to correctly identify which device the received device information is transmitted from.

  In a network environment based on DHCP (Dynamic Host Configuration Protocol), when a large number of clients are connected to the network, it is not necessary to manually perform network settings (for example, “IP address assignment”) for each client. Further, when a mobile terminal (for example, “notebook PC (Personal Computer)”) is connected to a network at a plurality of locations, it is not necessary to manually switch the network settings. In this way, there is an advantage that the labor of network management can be reduced.

  For this reason, even in the device management system as described above, the network setting of each device is automatically performed when the number of devices to be managed is increased and decreased, and the network management effort can be reduced. An environment may be constructed.

  Under such a network environment, an IP address is automatically assigned to the device. Therefore, there is a possibility that the IP address assigned to each device differs from the IP address of each device managed on the device management apparatus side.

  If the IP addresses are different, the device management apparatus cannot correctly identify the information transmitted from the device even if the device information is received from the device by Trap.

  Therefore, the device management apparatus cannot determine whether the device that transmitted the device information is a management target device or a non-management target device, and the received device information cannot be handled as device management data. As a result, device management cannot be performed normally.

  Therefore, the device management apparatus performs predetermined data communication with the device in order to determine whether the device is a managed device or a non-managed device, and information that can identify the device (for example, “specific to the hardware of the network device). Physical address: MAC (Media Access Control) address ”). Furthermore, since it is possible that the device management device and the device have different security level settings during communication with each other, when data communication with the device is performed, an appropriate security level (security level appropriate to the device) should be used. It is necessary to communicate.

  The present invention has been proposed in view of the above-described problems of the prior art, and its object is to be conscious of security even if the network setting of the device is changed in an environment where the network setting is automatically performed. To provide a device management apparatus, a device management system, a device management method, a device management program, and a recording medium on which the program is recorded, which can identify a device as an information transmission source by a communication method and can perform device management normally. is there.

In order to achieve the above object, the device management apparatus according to the present invention acquires device information transmitted from a device connected to a predetermined data transmission path, and manages the device based on the acquired device information. A device management device,
Security level acquisition means for acquiring security level information indicating the security level at the time of communication set in the device based on the network setting information of the transmission source;
Device identification means for identifying the transmission source device based on device identification information for identifying the device acquired from the device according to the security level indicated in the security level information;
When the transmission source device identified by the device identification means is a management target device managed by the device management apparatus, based on the received device information, among the device information of one or a plurality of management target devices, A device information updating means for updating the corresponding device information;
Device verification information holding means for holding device verification information including network setting information of the management target device and management target device specifying information for specifying the management target device;
The device verification information is referred to based on the network setting information of the transmission source to check whether the network setting information of the corresponding managed device is included in the device verification information, and based on the confirmation result, the transmission source Managed device determination means for determining whether the device is a managed device;
Determination condition conversion means for converting an IP address included in the network setting information of the transmission source into a host name;
The determination condition conversion means includes:
When the managed device determination unit confirms that the network setting information of the managed device corresponding to the device verification information is not included, the IP address is converted into the host name;
The management target device determination unit is requested to determine whether or not the transmission source device is a management target device .

  With such a configuration, the device management apparatus according to the present invention stores information (hereinafter referred to as “security level information”) indicating a communication security level set for the device based on the IP address of the transmission source. Acquire information that identifies a device in accordance with the security level indicated in the acquired information (hereinafter referred to as “device identification information”). Subsequently, the device that transmitted the device information is specified based on the acquired device specifying information. As a result, if the identified device is a managed device, the device information of the corresponding managed device is updated based on the received device information.

  As a result, the device management apparatus according to the present invention can identify the information transmission source device by a security-conscious communication method even if the network setting of the device is changed in an environment where the network setting is automatically performed. it can. As a result, the received device information can be handled as device management data, and device management can be performed normally.

In order to achieve the above object, the device management system according to the present invention acquires device information transmitted from a device connected to a predetermined data transmission path, and manages the device based on the acquired device information. A device management system that
Security level acquisition means for acquiring security level information indicating the security level at the time of communication set in the device based on the network setting information of the transmission source;
Device identification means for identifying the transmission source device based on device identification information for identifying the device acquired from the device according to the security level indicated in the security level information;
When the transmission source device identified by the device identification means is a managed device managed by the device management apparatus, based on the received device information, among the device information of one or more managed devices, A device information updating means for updating the corresponding device information;
Device verification information holding means for holding device verification information including network setting information of the management target device and management target device specifying information for specifying the management target device;
The device verification information is referred to based on the network setting information of the transmission source to check whether the network setting information of the corresponding managed device is included in the device verification information, and based on the confirmation result, the transmission source Managed device determination means for determining whether the device is a managed device;
Determination condition conversion means for converting an IP address included in the network setting information of the transmission source into a host name;
The determination condition conversion means includes:
When the managed device determination unit confirms that the network setting information of the managed device corresponding to the device verification information is not included, the IP address is converted into the host name;
The management target device determination unit is requested to determine whether or not the transmission source device is a management target device .

In order to achieve the above object, a device management method according to the present invention acquires device information transmitted from a device connected to a predetermined data transmission path, and manages the device based on the acquired device information. A device management method in
Security level acquisition procedure for acquiring security level information indicating the security level at the time of communication set in the device based on the network setting information of the transmission source;
A device identification procedure for identifying the transmission source device based on the device identification information for identifying the device acquired from the device according to the security level indicated in the security level information;
When the transmission source device identified by the device identification procedure is a managed device managed by the device management apparatus, based on the received device information, among the device information of one or more managed devices, A device information update procedure for updating the corresponding device information;
A device verification information holding procedure for holding device verification information including network setting information of the management target device and management target device specifying information for specifying the management target device;
The device verification information is referred to based on the network setting information of the transmission source to check whether the network setting information of the corresponding managed device is included in the device verification information, and based on the confirmation result, the transmission source Managed device determination procedure for determining whether or not the device is a managed device;
A determination condition conversion procedure for converting an IP address included in the network setting information of the transmission source into a host name;
The determination condition conversion procedure is as follows:
When the managed device determination procedure confirms that the network setting information of the managed device corresponding to the device verification information is not included, the IP address is converted into the host name,
The management target device determination unit that executes the management target device determination procedure is requested to determine whether or not the transmission source device is a management target device .

  By such a procedure, the device management method according to the present invention acquires the security level information at the time of communication set for the device from the device based on the IP address of the transmission source, and according to the security level indicated in the acquired information. Acquire device identification information, identify the device that sent the device information based on the acquired device identification information, and if the identified device is a managed device, the corresponding managed device is identified based on the received device information. The operation of updating device information is realized.

  As a result, the device management method according to the present invention identifies the information transmission source device using a security-conscious communication method even if the network setting of the device is changed in an environment where the network setting is automatically performed. An environment where management can be performed normally can be provided.

  According to the present invention, even if an IP address assigned to a device is changed in an environment where network settings are automatically performed, the device management apparatus can identify a device by a communication method in consideration of security and can perform device management normally. A device management system, a device management method, a device management program, and a recording medium recording the program can be provided.

It is a figure which shows the structural example of the apparatus management system which concerns on the 1st Embodiment of this invention. It is a figure which shows the hardware structural example of the apparatus management apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the function structural example which the apparatus management apparatus which concerns on the 1st Embodiment of this invention has. It is a figure which shows the example of data of the apparatus collation information which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the example of a process sequence which performs SNMP communication which concerns on the 1st Embodiment of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the drawings.

[First Embodiment]
<System configuration>
A configuration of the device management system according to the present embodiment will be described.

FIG. 1 is a diagram illustrating a configuration example of a device management system 1 according to the present embodiment.
As shown in FIG. 1, the device management system 1 includes, for example, a plurality of devices 200 that are image processing apparatuses such as MFPs and LPs (Laser Printers), and a plurality of client PCs 300 (hereinafter simply referred to as “PCs”) such as user terminals. And the device management apparatus 100 are connected to each other through a data transmission path 90 such as a network.

  With such a system configuration, the device management apparatus 100 acquires device information including various logs (for example, “job log” and “access log”) from the device 200, and performs device management by monitoring the device state. . In addition, the PC 300 is provided with various types of information regarding the state of the management target device 200.

  In addition, a network management apparatus 400 that is a DHCP / DNS (Domain Name System) server is connected to the device management system 1 shown in FIG.

  DHCP refers to a protocol that automatically assigns information necessary for a computer to connect to a network (for example, network setting information such as an “IP address”). DNS is a system that searches for an IP address of a host by referring to a computer called a DNS server when a host name is input. In DNS, forward lookup for retrieving an IP address from a host name and reverse lookup for retrieving a host name from an IP address (name resolution) can be performed.

  Here, the host name is a unique human-readable name given to the device 200 connected to the network.

  In such a network management apparatus 400, when an IP address is assigned to the device 200 by DHCP, a DNS entry (association between “IP address” and “host name”) is dynamically updated in conjunction with the IP address. .

  With such a system configuration, it is possible to flexibly cope with increase / decrease in the device 200, the PC 300, etc. in the device management system 1, and it is possible to reduce the trouble of network management.

  The system configuration illustrated in FIG. 1 is an example of a network environment in which the IP address assigned to the device 200 may be changed (whether manually or automatically), and the present invention is limited to the above configuration. It is not a thing.

<Hardware configuration>
Next, a hardware configuration of the device management apparatus 100 according to the present embodiment will be described.

FIG. 2 is a diagram illustrating a hardware configuration example of the device management apparatus 100 according to the present embodiment.
As shown in FIG. 2, the device management apparatus 100 includes an input device 101, a display device 102, a drive device 103, a RAM (Random Access Memory) 104, a ROM (Read Only Memory) 105, a CPU 106, an interface device 107, and an HDD ( (Hard Disk Drive) 108 and the like, each of which is connected to each other via a bus.

  The input device 101 includes a keyboard and a mouse, and is used to input each operation signal to the device management apparatus 100. The display device 102 includes a display or the like, and displays a processing result (for example, “device status information”) by the device management device 100.

  The interface device 107 is an interface that connects the device management apparatus 100 to a predetermined data transmission path 90 such as a network. Therefore, the device management apparatus 100 can perform data communication with the device 200, the PC 300, and the network management device 400 via the interface device 107.

  The HDD 108 is a non-volatile storage device that stores various programs and data. The stored programs and data include, for example, an OS (Operating System) that is basic software such as an information processing system (for example, “Windows (registered trademark)” or “UNIX (registered trademark)”) that controls the entire device management apparatus 100. ), And an application that provides various functions (for example, “device management function”) on the information processing system. The HDD 108 manages the stored programs and data by a predetermined file system and / or DB (Data Base).

  The drive device 103 is an interface with a removable recording medium 103a. Therefore, the device management apparatus 100 can read and / or write the recording medium 103a via the drive device 103.

  The ROM 105 is a nonvolatile semiconductor memory (storage device) that can retain internal data even when the power is turned off. The ROM 105 stores data such as a basic input / output system (BIOS) that is executed when the device management apparatus 100 is activated, and system settings and network-related settings of the device management apparatus 100.

  The RAM 104 is a volatile semiconductor memory (storage device) that temporarily stores programs and data read from the various storage devices.

  The CPU 106 operates the overall control of the device management apparatus 100 and various functions installed in the device management apparatus 100 by executing the program read on the RAM 104.

  With such a hardware configuration, for example, the device management apparatus 100 can implement a device management function by executing a program (device management program) read from the HDD 108 onto the RAM 104 by the CPU 106.

<Device specific function>
Next, a device management function according to the present embodiment will be described.

  In the device management apparatus 100 according to the present embodiment, the security level information at the time of communication set in the device 200 is acquired from the device 200 based on the IP address of the transmission source. Subsequently, device specifying information is acquired from the device 200 in accordance with the security level indicated in the acquired information. Subsequently, the device 200 that has transmitted the device information is specified based on the acquired device specifying information. As a result, if the identified device 200 is a managed device, the device information of the corresponding managed device is updated based on the received device information. The device management apparatus 100 has such a device management function.

  For example, in a network environment in which an IP address is automatically assigned, the IP address assigned to each device 200 and the IP address of each managed device managed by the device management apparatus 100 may be different.

  If the IP addresses are different, even if the device management apparatus 100 receives device information transmitted from the device 200 by SNMP Trap, it cannot correctly identify which device 200 has transmitted the information. . Therefore, the received device information cannot be handled as device management data, and device management cannot be performed normally.

  Therefore, the device management apparatus 100 must determine whether the transmission source device 200 is a managed device or a non-managed device. At this time, it is necessary to perform predetermined data communication with the device 200 and acquire device specifying information of the device 200. Furthermore, it is also conceivable that the device management apparatus 100 and the device 200 have different security level settings during communication. When performing data communication with the device 200, it is necessary to perform communication at an appropriate security level (security level suitable for the device 200).

  Therefore, the device management apparatus 100 according to the present embodiment acquires device identification information from the device 200 according to the security level corresponding to the transmission source device 200, and identifies the device 200 that transmitted the device information based on the acquired information. Then, it is determined whether the identified device 200 is a managed device or a non-managed device. As a result, when the identified device 200 is a management target device, the device management apparatus 100 updates the device information of the corresponding management target device based on the received device information.

  As a result, the device management apparatus 100 specifies the information transmission source device 200 by a communication method in consideration of security even when the IP address assigned to the device 200 is changed in an environment where network setting is automatically performed. Device management can be performed normally.

<Functional configuration>
The configuration and operation of the log management function will be described below.

FIG. 3 is a diagram illustrating a configuration example of the device management function according to the present embodiment.
As illustrated in FIG. 3, the device management apparatus 100 includes a device verification data acquisition unit 21, a device verification information holding unit 22, a device information acquisition unit 23, a management target device determination unit 24, a determination information conversion unit 25, and a security level acquisition. A unit 26, a device identification unit 27, a received data processing unit 28, a device verification information update unit 29, and the like.

  The device verification data acquisition unit 21 acquires various verification data for identifying the device 200 from the device 200 and the network management device 400. The data acquired here is device identification information. The device identification information includes, for example, a physical address unique to the hardware of the network device (hereinafter referred to as “MAC (Media Access Control) address”).

  In addition, the verification data is acquired by making an information acquisition request using an SNMP command (such as a Get command) based on the IP addresses of the device 200 and the network management device 400, and from the device 200 and the network management device 400. It can be obtained by receiving a response.

  In this way, the various verification data acquired by the device verification data acquisition unit 21 is stored as the device verification information 31, for example, in a predetermined storage area of the storage device (for example, “HDD 108”) included in the device management apparatus 100. Retained. Therefore, the storage area that holds the device verification information 31 corresponds to the device verification information holding unit 22.

(Device verification information)
Here, the device verification information 31 will be described with reference to FIG.

FIG. 4 is a diagram illustrating a data example of the device verification information 31 according to the present embodiment.
As shown in FIG. 4, the device verification information 31 includes information items “IP address”, “host name”, “MAC address”, and “SNMP communication setting”, and each information item corresponds to each device 200. It is attached. That is, if any one item data is clear, other item data can be specified based on this data.

  The “IP address” is device verification data acquired by the device information acquisition unit 23 described later. “IP address” is data indicating an IP address assigned to the device 200.

  The “host name” and “MAC address” are device verification data acquired by the device verification data acquisition unit 21 as described above. “Host name” is data indicating the host name of the device 200, and “MAC address” is data indicating the physical address of a network I / F device (not shown) included in the device 200. For example, it is data held by a NIC (Network I / F Card) or the like.

  “SNMP communication setting” is data indicating whether or not there is various control information related to data communication using SNMP (presence of control information). The various control information includes SNMP version information (v1, v2, v3) during communication, various SNMP command parameters in each version, and the like.

  In the SNMP communication setting item, it can be set whether or not there is various control information.

  Each setting item can be set and changed by a user including an administrator using a predetermined tool (such as a browser) or a predetermined command via the input device 101 included in the device management apparatus 100. it can.

  The device 200 registered in the device verification information 31 is a management target device managed by the device management apparatus 100. Therefore, the “IP address” and the “host name” correspond to the network setting information of the management target device, and the “MAC address” corresponds to information for specifying the management target device (management target device identification information).

  In the present embodiment, the device specifying unit 24 described later specifies the device 200 using the device verification information 31.

  Next, the device information acquisition unit 23 acquires device information from the device 200. As described above, the acquisition of device information from the device 200 mainly includes polling and trap. In the present embodiment, it is assumed that device information is transmitted from the device 200 by Trap. Therefore, the device information acquisition unit 23 receives the message transmitted from the device 200 to acquire the device information in the message. The device information acquisition unit 23 also acquires an IP address in a message transmitted from the device 200 when acquiring device information. This IP address is an address assigned to the device 200 from the network management device 400. That is, the network setting information of the transmission source.

  In this way, the device management apparatus 100 acquires device information from the device 200. However, unlike information acquisition by polling, the device management apparatus 100 makes an information acquisition request from the device management apparatus 100 and receives information from the device 200 as a response. I don't mean.

  Therefore, in a network environment in which the IP address may be changed, it cannot be determined which device 200 should receive the received device information as device management data. Therefore, in order to make a correct determination, the device management apparatus 100 needs to specify the transmission source device 200. Therefore, the device management apparatus 100 includes a management target device determination unit 24, a determination information conversion unit 25, a security level acquisition unit 36, and a device identification unit 27.

  The management target device determination unit 24 determines the possibility of whether or not the device 200 is a management target device. The managed device determination unit 24 accesses the device verification information 31 held by the device verification information holding unit 22 and determines whether or not the corresponding registered IP address exists based on the IP address acquired by the device information acquisition unit 23. Confirm. That is, based on the network setting information of the transmission source, it is confirmed whether the device verification information 31 includes the network setting information of the corresponding managed device. At this time, when the corresponding IP address exists, it is determined that the device 200 may be a management target device. On the other hand, when the corresponding IP address does not exist, it is determined that the device 200 may be an unmanaged device (possibly not a managed device).

  Further, the management target device determination unit 24 can confirm whether or not the corresponding registered host name exists based on the host name other than the IP address. This is based on the IP address, and it is determined whether or not the device 200 is a management target device. If it is determined that there is a possibility that the device 200 is a non-management target device, the host name is set as the next step. Judge again based on this. Based on these two determination conditions, the possibility of whether or not the device 200 is a managed device is determined.

  For this reason, the present embodiment includes a determination information conversion unit 25 that converts an IP address, which is a determination condition, into a host name.

  The determination information conversion unit 25 converts the IP address into a host name. The conversion method can be converted by, for example, reverse DNS lookup. That is, when an IP address is input, a computer called a DNS server is referred to search for a registered host name corresponding to the IP address. As a result, the host name is acquired.

  Thus, the host name converted by the determination information conversion unit 25 is passed to the management target device determination unit 24, and the management target device determination unit 24 confirms again the possibility of being a management target device.

  Subsequently, when the management target device determination unit 24 determines that the device 200 is a management target device, the device specification for specifying the information transmission source device 200 according to the security level according to the device 200 is specified. Get information.

  Therefore, in this embodiment, the security level acquisition unit 26 that acquires the security level information set in the device 200 is provided.

  The security level acquisition unit 26 acquires the security level information currently set for the device 200 from the device 200 determined as the management target device by the management target device determination unit 24. The acquisition method is performed by making an information acquisition request using an SNMP command (such as a Get command) based on the acquired IP address from the device 200 and receiving a response from the device 200.

  In this way, the security level information acquired by the security level acquisition unit 26 is passed to the device specifying unit 27 described later, and the device specifying unit 27 is the device that is the information transmission source according to the security level indicated in the security level information. Device identification information is acquired from 200.

  The device specifying unit 27 specifies whether the information transmission source device 200 is a managed device or a non-managed device. Further, when the information transmission source device 200 is a management target device, it is determined whether or not the IP address (transmission source network setting information) assigned after the registration as the management target device has been changed. To do.

  As described above, the management target device determination unit 24 determines whether or not the information transmission source device 200 is a management target device based on the IP address or the host name. However, since the information used for the determination is not necessarily invariant information in the network environment, the possibility of whether or not the device is a management target device is determined at this stage.

  Therefore, the device specifying unit 27 determines whether or not the device 200 is a management target device. As a reason for having a stepwise determination function in this way, it is possible to specify a non-management target device without acquiring device specifying information from the information transmission source device 200. Specifically, if the data of both the IP address and the host name of the device 200 that is the information transmission source do not exist in the device verification information 31, it can be specified that the device 200 is the unmanaged device 200. .

(Identification of equipment)
First, the device identification unit 27 acquires device identification information from the information transmission source device 200 based on the transmission source IP address acquired by the device information acquisition unit 23. The device identification information can be acquired from the device 200 by making an information acquisition request using an SNMP command (Get command), for example.

  Subsequently, the device identification unit 27 acquires the acquired device identification information (for example, “acquired MAC address of the device 200”) and the management target device identification information (for example, “the management target device of the management target device”) held in the device verification information holding unit 22 described above. The device 200 that has transmitted the device information is identified based on the “registered MAC address”). The device verification information 31 currently includes the MAC address of the management target device managed by the device management apparatus 100 and is associated with the IP address (network setting information of the management target device).

  Therefore, based on the IP address of the transmission source acquired by the device information acquisition unit 23, the MAC address item of the device verification information 31 is referred to, and the corresponding registered MAC address and the acquired MAC address of the device 200 are verified (compared). To do.

  At this time, if the MAC addresses match, it can be determined that the device 200 is a managed device even if the IP addresses are different. On the other hand, if the MAC addresses do not match, it is determined whether or not there is a corresponding MAC address that matches the acquired MAC address of the device 200 in the device verification information 31. As a result, if there is no matching MAC address, the information transmission source device 200 can be identified as a non-managed device (a device that is not currently managed). In addition, when the corresponding MAC address associated with the acquired IP address does not exist in the device verification information 31 reference, there is a corresponding MAC address that matches the acquired MAC address of the device 200 that is the information transmission source. It is determined whether or not.

  In this way, the device management apparatus 100 identifies the information transmission source device 200 based on hardware-invariant information in the device 200 (or the network I / F device included in the device 200).

(Change IP address)
The device specifying unit 27 determines that the IP address (source network setting information) assigned to the device 200 has been changed when the MAC addresses do not match in the verification.

  As described above, the device management apparatus 100 uses the device identification unit 27 to identify a management target device or a non-management target device of the device 200, and if it is a management target device, the assigned IP address is changed. It is also judged whether or not it is done. Thereby, when the IP address is changed in the management target device, the device verification information 31 is updated together with the update of the device information. If the device is an unmanaged device, the device information and the device verification information 31 are added / updated according to an instruction from a user including the administrator after confirming whether or not the device is a new management target.

  In accordance with instructions from the device specifying unit 27, each of the following functional units performs such information update and update confirmation.

  The device verification information update unit 29 updates the device verification information 31 held by the device verification information holding unit 22. The device verification information 31 includes an IP address, a host name, a MAC address, and an SNMP communication setting. Therefore, when the device identification unit 27 determines that the IP address of the management target device has been changed, the device verification information update unit 29 updates the association between the IP address and the MAC address. In addition, when the device specifying unit 27 specifies a non-management target device, new device verification data including an IP address and a MAC address is added.

  Further, when the device identifying unit 27 identifies the device 200 as a management target device or when the device collation information update unit 29 adds / updates device collation data, the received data processing unit 28 Each functional unit instructs to update device management data corresponding to the device 200.

  The reception data processing unit 28 updates device management data managed by the device management apparatus 100. The device management apparatus 100 monitors the operation state of each managed device by managing device information acquired from the managed device as device management data. Therefore, the reception data processing unit 28 updates the corresponding device management data based on the device information from the device 200 specified as the management target device by the device specifying unit 27. In addition, when the device 200 is identified as an unmanaged device, the received data processing unit 28 discards received data that is device information from the device 200.

  As described above, the device management function according to the present embodiment is realized by the above-described functional units linking to each other.

<Functional operation>
In the following, detailed operation of the device management function (operation of function unit group) will be described with reference to a flowchart showing a processing procedure.

  In the device management function, a device management program (software component) installed (installed) in the device management apparatus 100 is read from the storage location (for example, “ROM 105”) onto the RAM 104 by the CPU 106, and the following processing is executed. Is realized.

  FIG. 5 is a flowchart illustrating an example of a processing procedure for performing SNMP communication according to the present embodiment. That is, this is a processing procedure when device information is transmitted from the device 200 to the device management apparatus 100 by Trap.

  As illustrated in FIG. 5, the device management apparatus 100 receives a Trap from the device 200 by the device information acquisition unit 23 (Step S <b> 101). The message received at this time corresponds to the device information from the device 200, and the device information transmitted by Trap is mainly an error notification about a failure that has occurred in the device 200.

  In addition, the device information acquisition unit 23 acquires the IP address of the transmission source included in the message when device information is received (step S102). That is, the IP address of the device 200 that transmitted the device information by Trap is acquired. Thereby, the IP address of the device 200 that is device verification data can be acquired.

  As described above, when the device information acquisition unit 23 receives the device information and the IP address from the device 200, the device information acquisition unit 23 notifies the management target device determination unit 24 of the reception.

  Subsequently, in the device management apparatus 100, the management target device determination unit 24 refers to the device verification information 31 held by the device verification information holding unit 22, and the device 200 is managed based on the IP address acquired in step S102. It is confirmed whether or not it is a device (step S103). Specifically, the IP address item of the device verification information 31 is referred to and it is determined whether or not the acquired IP address exists in the item. That is, it is determined whether or not the device 200 corresponding to the acquired IP address is registered in the device verification information 31 as a management target device. If it exists in the item, since the acquired IP address is registered as the IP address of the managed device, it can be determined that the device 200 is the managed device. On the other hand, if the IP address does not exist in the item, the acquired IP address is not registered as the IP address of the management target device. Therefore, it can be determined that the device 200 may not be the management target device.

  If it is confirmed in step S103 that the device 200 is a device to be managed (step S104: YES), the device management apparatus 100 uses the security level acquisition unit 26 to obtain information on the security level during SNMP communication from the device 200. Obtain (step S105). Specifically, information on the security level at the time of SNMP communication currently set in the device 200 is acquired from the device 200 determined to be a management target device using an SNMP command based on the acquired IP address.

  In SNMP, the security level during communication differs depending on the version. Therefore, the information acquired in step S105 differs depending on the version.

  Therefore, the security level acquisition unit 26 first acquires information on the latest version among the SNMP supported by the device 200. As a result, it is specified which version of the three versions (v1, v2c, v3) mainly used in SNMP from the acquired version.

  At this time, if the specified version is SNMPv1 or v2c, information such as a community name is acquired. The “community” referred to here represents the range of the network system managed by SNMP, and the community name serves as a password associated with the authority of the community. For example, the SNMP manager and the agent cannot communicate if the community names do not match.

  If the specified version is SNMPv3, security levels such as noAuthNoPriv (authentication and encryption), authNoPriv (authentication but not encryption), authPriv (authentication and encryption), etc. Get the setting value. Depending on the security level, information such as an authentication method (MD5 (Message Digest Algorithm 5) or SHA (Secure Hash Algorithm)) or an encryption protocol (DES (Data Encryption Standard) or AES (Advanced Encryption Standard)) is used. To get.

  As described above, the security level acquisition unit 26 uses the version with the highest security level among the SNMP versions supported by the device 200 for data communication between the device management apparatus 100 and the device 200. get.

  Subsequently, the device management apparatus 100 acquires a MAC address (device specifying information of the device 200) from the device 200 that the device specifying unit 27 determines to be a management target device using an SNMP command based on the acquired IP address. (Step S106). Specifically, a MAC address acquisition request is made to the device 200, and a MAC address is acquired by receiving a response from the device 200. For example, an SNMP Get command specifies an OID of a MIB object value of a MAC address defined in an IP group or an Interface group, and receives a response by making an information acquisition request. Thereby, the MAC address of the device 200 which is device verification data can be acquired.

  Subsequently, the device specifying unit 27 refers to the device verification information 31 and searches for the corresponding MAC address based on the MAC address acquired in step S106 (step S107). That is, based on the search result, it is determined whether or not the device 200 corresponding to the acquired MAC address is registered in the device verification information 31 as a management target device.

  In step S107, when there is relevant data (step S108: YES), the device specifying unit 27 obtains the acquired MAC address from the device 200 and the corresponding MAC address associated with the acquired IP address in the device verification information 31. Are matched (step S109).

  If it is confirmed in step S109 that they match (step S110: YES), the device specifying unit 27 specifies that the device 200 is a management target device. Further, it is determined that the IP address of the management target device has not been changed.

  As a result, the device management apparatus 100 causes the received data processing unit 28 to process the device 200 that has received the trap as a management target device (step S111). Specifically, the reception data processing unit 28 updates the device information of the device 200 corresponding to the acquired IP address based on the received device information (latest information).

  On the other hand, when it is confirmed in step S103 that there is a possibility that the device 200 is not a managed device (step S104: NO), or when it is confirmed in step S109 that the MAC addresses do not match ( In step S110: NO), the device management apparatus 100 converts the acquired IP address into a corresponding host name by the determination information conversion unit 25 (step S112).

  In the above processing, it is determined whether or not the device 200 is a management target device based on the acquired IP address when the device information is received. However, even if the IP address registration confirmation in step S104 or the MAC address verification confirmation in step S110 is performed, the device 200 may not be identified as a management target device. Therefore, the determination condition as to whether or not the device is a management target device, that is, the acquired IP address used at the time of determination is converted into other information that can be similarly used at the time of determination. Make a decision.

  Therefore, the determination information conversion unit 25 accesses the network management device 400 and acquires a host name corresponding to the IP address based on the acquired IP address. For example, the host name corresponding to the IP address is examined (name resolution) by reverse DNS lookup. As a result, the host name of the device 200 that is device verification data can be acquired.

  In the device management apparatus 100, the management target device determination unit 24 refers to the device verification information 31 and checks whether the device 200 is a management target device based on the host name converted in step S112 (step S113). Specifically, the host name item of the device verification information 31 is referred to and it is determined whether or not the converted host name exists in the item. That is, it is determined whether or not the device 200 corresponding to the converted host name is registered in the device verification information 31 as a management target device. If it exists in the item, the post-conversion host name is registered as the host name of the device to be managed, so that it can be determined that the device 200 is a device to be managed. On the other hand, if it does not exist in the item, since the host name after conversion is not registered as the host name of the management target device, it can be determined that the device 200 may not be the management target device.

  If it is confirmed in step S113 that the device 200 is a device to be managed (step S114: YES), the device management apparatus 100 executes each processing procedure from steps S115 to S120. Note that the processing procedures of steps S115 to S120 are the same as the processing procedures of steps S105 to S110 described above. Therefore, detailed description is omitted for the sake of convenience, and the processing procedure after step S120 will be described.

  When it is confirmed in step S119 that they match (step S120: YES), the device specifying unit 27 specifies that the device 200 is a management target device. Further, it is determined that the IP address of the management target device has been changed.

  As a result, the device management apparatus 100 uses the device verification information update unit 29 to access the device verification information holding unit 22 and update the device verification information 31 (step S121). Specifically, after referring to the device verification information 31, the corresponding verification data of the device 200 in the device verification information 31 is updated based on each data such as the acquired IP address, the host name after conversion, and the acquired MAC address.

  When the device management apparatus 100 updates the device verification information 31 to the latest state, the device management apparatus 100 proceeds to the processing procedure of step S111.

  Further, when there is no corresponding data (acquired MAC address) in the device reference information 31 in steps S108 and S118 (steps S108 and S118: NO), or when it is confirmed in step S119 that the MAC addresses do not match. (Step S120: NO), the device management apparatus 100 identifies that the device 200 is not a managed device (is a non-managed device) by the device identifying unit 27.

  As a result, the device management apparatus 100 causes the received data processing unit 28 to process the device 200 that has received the trap as a non-management target device (step S122). Specifically, the reception data processing unit 28 discards the received device information and does not update the device information of the management target device.

<Summary>
As described above, according to the device management apparatus 100 according to the present embodiment, the device identification information is acquired from the IP address of the transmission source, the device 200 that transmitted the device information is identified based on the acquired device identification information, If the identified device 200 is a managed device, the device information of the corresponding managed device is updated based on the received device information.

  Among them, the device management apparatus 100 acquires information indicating the security level at the time of communication set in the device 200 from the device 200 based on the IP address of the transmission source, and in accordance with the security level indicated in the acquired information Acquiring specific information.

  As a result, the device management apparatus 100 identifies the device 200 that has transmitted the device information using a security-conscious communication method even if the IP address assigned to the device 200 is changed in an environment where network settings are automatically performed. can do. As a result, the received device information can be handled as device management data, and device management can be performed normally.

  Although the above embodiment has been described so far, the “device management function” of the device management apparatus 100 according to the above embodiment describes each processing procedure described with reference to the drawing in accordance with the operating environment (platform). This is realized by the CPU 106 executing a program coded in a programming language suitable for the above.

  The program can be stored in a computer-readable recording medium 103a. Examples of the recording medium 103a include a floppy (registered trademark) disk, a CD (Compact Disk), a DVD (Digital Versatile Disk), an SD memory card (SD Memory Card), and a USB (Universal Serial Bus) memory.

  Therefore, the program can be installed in the device management apparatus 100 via the drive device 103 that can read the recording medium 103a, an external storage I / F (not shown), or the like. In addition, since the device management apparatus 100 includes the interface device 107, the program can be downloaded and installed using a telecommunication line such as the Internet.

  In the above-described embodiment, the configuration in which a device (network management device 400) different from the device management device 100 is equipped with the functions of DHCP and DNS is described as an example. For example, the device management apparatus 100 may be configured to have the functions of DHCP and DNS.

  In the above embodiment, the configuration (configuration including the device identification information holding unit 22) that holds the device identification information 31 in a storage device (for example, “HDD 108”) included in the device management apparatus 100 has been described. This is not the case. For example, if the device management apparatus 100 includes an external storage I / F device (not shown), the recording medium 103a including the SD memory card (SD Memory Card) and the USB (Universal Serial Bus) memory holds the configuration. It may be. Furthermore, a configuration may be employed in which an external device connected by a predetermined data transmission path 90 holds via an interface device 107 provided in the device management apparatus 100.

  Finally, the present invention is not limited to the requirements shown here, such as combinations of other elements with the shapes and configurations described in the above embodiments. With respect to these points, the present invention can be changed within a range that does not detract from the gist of the present invention, and can be appropriately determined according to the application form.

1 device management system 21 device verification data acquisition unit 22 device verification information holding unit 23 device information acquisition unit 24 management target device determination unit 25 determination information conversion unit 26 security level acquisition unit 27 device identification unit 28 received data processing unit 29 device verification Information update unit 31 Device verification information 90 Data transmission path 100 Device management device (device management server)
101 Input Device 102 Display Device 103 Drive Device (a: Recording Medium)
104 RAM (volatile semiconductor memory)
105 ROM (nonvolatile semiconductor memory)
106 CPU (Central Processing Unit)
107 Interface device (NIC: Network I / F Card)
108 HDD (nonvolatile storage device)
200 devices (image processing apparatus: including managed / unmanaged)
300 Client PC (information processing device)
400 Network management device (DHCP / DNS server)

JP 2003-296206 A

Claims (13)

A device management apparatus that acquires device information transmitted from a device connected to a predetermined data transmission path and manages the device based on the acquired device information,
Security level acquisition means for acquiring security level information indicating the security level at the time of communication set in the device based on the network setting information of the transmission source;
Device identification means for identifying the transmission source device based on device identification information for identifying the device acquired from the device according to the security level indicated in the security level information;
When the transmission source device identified by the device identification means is a management target device managed by the device management apparatus, based on the received device information, among the device information of one or a plurality of management target devices, A device information updating means for updating the corresponding device information;
Device verification information holding means for holding device verification information including network setting information of the management target device and management target device specifying information for specifying the management target device;
The device verification information is referred to based on the network setting information of the transmission source to check whether the network setting information of the corresponding managed device is included in the device verification information, and based on the confirmation result, the transmission source Managed device determination means for determining whether the device is a managed device;
Determination condition conversion means for converting an IP address included in the network setting information of the transmission source into a host name;
The determination condition conversion means includes:
When the managed device determination unit confirms that the network setting information of the managed device corresponding to the device verification information is not included, the IP address is converted into the host name;
A device management apparatus that requests the management target device determination unit to determine whether or not the transmission source device is a management target device. The managed device determining means includes
When it is confirmed that the network setting information of the managed device corresponding to the device verification information is included,
The device management apparatus according to claim 1 , wherein the security level acquisition unit requests the acquisition of security level information set in the transmission source device. The device specifying means includes
Refer to the device verification information based on the device identification information acquired from the transmission source device, confirm whether the device verification information includes the management target device identification information of the corresponding management target device, and check result based on the device management apparatus according to claim 1 or 2, characterized in that identifying the transmission source device is a device to be managed. The device specifying means includes
When it is confirmed by the managed device determination means that the network setting information of the managed device corresponding to the device verification information is included,
The managed device identification information acquired from the device verification information based on the network setting information of the transmission source is compared with the device identification information acquired from the transmission source device. The device management apparatus according to claim 3 , wherein the transmission source device that is a device is specified. The device specifying means includes
The device management apparatus according to claim 4 , wherein the device to be managed that matches the matching result is identified as the transmission source device. The device specifying means includes
The matching result does not match,
And when it is confirmed that the network setting information of the management target device corresponding to the device verification information is not included, or the management target device identification information of the management target device corresponding to the device verification information is not included. Is confirmed,
The device management apparatus according to claim 4 or 5 , wherein the transmission source device is identified as not being a management target device. The device specifying means includes
The matching result does not match,
And when it is confirmed that the managed device identification information of the managed device corresponding to the device verification information is included,
Identify the source device that is the managed device,
And device management apparatus according to any one of claims 4 to 6, characterized in that it is determined that the IP address assigned to the transmission source device is changed. The device management device
A device verification information update means for updating the device verification information;
The device verification information update means includes
By the device identifying means, identify the transmission source device that is the managed device,
And when it is determined that the IP address assigned to the source device has been changed,
The device management apparatus according to any one of claims 1 to 7 , wherein the device verification information is updated. The network setting information is
Device management apparatus according to any one of claims 1 to 8, characterized in that it comprises an IP address assigned to the device. A device management system for acquiring device information transmitted from a device connected to a predetermined data transmission path, and managing the device based on the acquired device information,
Security level acquisition means for acquiring security level information indicating the security level at the time of communication set in the device based on the network setting information of the transmission source;
Device identification means for identifying the transmission source device based on device identification information for identifying the device acquired from the device according to the security level indicated in the security level information;
When the transmission source device identified by the device identification means is a managed device managed by the device management apparatus, based on the received device information, among the device information of one or more managed devices, A device information updating means for updating the corresponding device information;
Device verification information holding means for holding device verification information including network setting information of the management target device and management target device specifying information for specifying the management target device;
The device verification information is referred to based on the network setting information of the transmission source to check whether the network setting information of the corresponding managed device is included in the device verification information, and based on the confirmation result, the transmission source Managed device determination means for determining whether the device is a managed device;
Determination condition conversion means for converting an IP address included in the network setting information of the transmission source into a host name;
The determination condition conversion means includes:
When the managed device determination unit confirms that the network setting information of the managed device corresponding to the device verification information is not included, the IP address is converted into the host name;
A device management system that requests the management target device determination unit to determine whether or not the transmission source device is a management target device . A device management method in a device management apparatus that acquires device information transmitted from a device connected to a predetermined data transmission path and manages the device based on the acquired device information,
Security level acquisition procedure for acquiring security level information indicating the security level at the time of communication set in the device based on the network setting information of the transmission source;
A device identification procedure for identifying the transmission source device based on the device identification information for identifying the device acquired from the device according to the security level indicated in the security level information;
When the transmission source device identified by the device identification procedure is a managed device managed by the device management apparatus, based on the received device information, among the device information of one or more managed devices, A device information update procedure for updating the corresponding device information;
A device verification information holding procedure for holding device verification information including network setting information of the management target device and management target device specifying information for specifying the management target device;
The device verification information is referred to based on the network setting information of the transmission source to check whether the network setting information of the corresponding managed device is included in the device verification information, and based on the confirmation result, the transmission source Managed device determination procedure for determining whether or not the device is a managed device;
A determination condition conversion procedure for converting an IP address included in the network setting information of the transmission source into a host name;
The determination condition conversion procedure is as follows:
When the managed device determination procedure confirms that the network setting information of the managed device corresponding to the device verification information is not included, the IP address is converted into the host name,
A device management method, which requests a management target device determination unit that executes the management target device determination procedure to determine whether or not the transmission source device is a management target device . A device management program in a device management apparatus that acquires device information transmitted from a device connected to a predetermined data transmission path and manages the device based on the acquired device information,
Computer
Security level acquisition means for acquiring security level information indicating the security level at the time of communication set in the device based on the network setting information of the transmission source;
Device identification means for identifying the transmission source device based on device identification information for identifying the device acquired from the device according to the security level indicated in the security level information;
When the transmission source device identified by the device identification means is a managed device managed by the device management apparatus, based on the received device information, among the device information of one or more managed devices, A device information updating means for updating the corresponding device information ;
Device verification information holding means for holding device verification information including network setting information of the management target device and management target device specifying information for specifying the management target device;
The device verification information is referred to based on the network setting information of the transmission source to check whether the network setting information of the corresponding managed device is included in the device verification information, and based on the confirmation result, the transmission source Managed device determination means for determining whether the device is a managed device;
Function as a determination condition conversion means for converting an IP address included in the network setting information of the transmission source into a host name ;
The determination condition conversion means includes:
When the managed device determination unit confirms that the network setting information of the managed device corresponding to the device verification information is not included, the IP address is converted into the host name;
A device management program that requests the management target device determination unit to determine whether or not the transmission source device is a management target device . A computer-readable recording medium storing the program according to claim 12 .

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