JP2019175174A - Connection destination determination device, connection destination determination program, and connection destination determination system - Google Patents

Abstract

To make it possible to determine a connection destination network even if there is a change in the configuration of the connection destination network.SOLUTION: A connection destination determination device 100 stores information on network devices connected to a registered network in a storage unit 120. An information acquisition unit (address acquisition unit) 111 acquires information on network devices connected to a connection destination network. A network determination unit 112 compares the network device information stored in the storage unit 120 with the network device information acquired by the information acquisition unit 111. If the number of network devices whose information match or the number of network devices whose information is already stored is equal to or greater than a predetermined threshold, the network determination unit determines that the connection destination network is the registered network.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a connection destination determination apparatus, a connection destination determination program, and a connection destination determination system that determine whether a network to which a terminal is connected is a registered network.

It is common to carry portable devices (terminals) such as personal computers, tablets, and smartphones, and use them by connecting to the destination network.
Depending on the usage form, it is necessary to determine which network the connected network is. For example, in order to collect information device information in order to manage its own information device assets, it is necessary to collect information only when connected to its own LAN (Local Area Network). When information is collected when connected to a public wireless LAN or connected to a home network, etc., even non-company assets are registered as own assets. Private information such as personal information that should not be collected / hidden Problems such as collecting information will occur.

  In addition, it is desirable to change the setting of the mobile device according to the connection destination network. For example, it is desirable to strengthen security measures by tightening firewall settings for portable devices in the order of public network, home network, and company LAN.

  As a technique for determining which network the terminal is connected to, such as that disclosed in Patent Document 1, an IP (Internet Protocol) address assigned to the terminal or a continuity test with a specific server is performed. A technique for recognizing a connected network environment is described. Patent Document 2 describes a technique for specifying a connection position based on a MAC (Media Access Control) address of a default gateway of a connected network.

Table 2007-007546 JP 2007-018479 A

  The techniques described in Patent Documents 1 and 2 determine a network based on the MAC address or network address of the default gateway of the connected network. However, if the default gateway is exchanged or the network settings are changed, the MAC address and network address of the default gateway change, which causes a problem that the network cannot be specified.

  As a result, in the previous information device asset management example, inappropriate information collection is performed, or misconfiguration of the firewall occurs, resulting in unauthorized access. Also, if the terminal is operating normally, it will remain unaware of replacement of the default gateway and changes in the network settings, and the user may not be aware of the erroneous determination state. For this reason, there is a need for a network determination method that can cope with network configuration changes such as device replacement and setting changes.

  The present invention has been made in view of such a background, and the present invention relates to a connection destination determination apparatus and a connection destination determination program capable of determining a connection destination network even when the configuration of the connection destination network is changed. It is another object of the present invention to provide a connection destination determination system.

  In order to solve the above-described problem, the invention according to claim 1 is a connection destination determination device that determines whether or not a connected network is a registered network, and is a predetermined type of network connected to the registered network. A storage unit that stores a plurality of registered device information indicating device information, an information acquisition unit that acquires connected device information indicating information of the predetermined type of network device connected to the connected network, and the registered device information When the number of network devices that match the connected device information or the number of network devices that include the connected device information in the registered device information is equal to or greater than a predetermined threshold, the connected network is registered as the registered device. A connection destination determination apparatus including a network determination unit that determines to be a network.

  According to the present invention, it is possible to provide a connection destination determination device, a connection destination determination program, and a connection destination determination system that can determine a connection destination network even when there is a change in the configuration of the connection destination network.

It is a figure which illustrates the whole structure of the connecting point determination apparatus which concerns on 1st Embodiment, and the structure of a network. It is a figure which illustrates the data structure of the marker apparatus database which concerns on 1st Embodiment. It is a flowchart of the network registration process which concerns on 1st Embodiment. It is a flowchart of the determination process of the connection destination network which concerns on 1st Embodiment. It is a figure which illustrates the whole structure of the connecting point determination apparatus which concerns on 2nd Embodiment, and the structure of a network. It is a figure which illustrates the data structure of the marker apparatus database which concerns on 2nd Embodiment. It is a flowchart of the network registration process which concerns on 2nd Embodiment. It is a flowchart of the determination process of the connection destination network which concerns on 2nd Embodiment. It is a figure which shows the whole structure of the connecting point determination apparatus which concerns on 3rd Embodiment, and a some registration network. It is a figure which illustrates the data structure of the marker apparatus database which concerns on 3rd Embodiment. It is a flowchart of the determination process of the connection destination network which concerns on 3rd Embodiment. It is the figure which illustrated the whole structure of the mobile terminal which concerns on 4th Embodiment, and the whole structure of an apparatus information collection server.

<< First Embodiment >>
Hereinafter, a connection destination determination device (connection destination network determination device) in a mode (embodiment) for carrying out the present invention will be described. The connection destination determination apparatus according to the first embodiment refers to the default gateway of the connection destination network (connection destination network) and the physical (MAC) address of the printer. Determine.

<< First Embodiment: Overall Configuration of Connection Destination Determination Apparatus >>
FIG. 1 is a diagram illustrating an overall configuration of a connection destination determination apparatus 100 and a network configuration according to the first embodiment. In addition to the connection destination determination device 100, the network includes a default gateway (also referred to as default GW (Gateway)) 210, a printer 220, a DHCP (Dynamic Host Configuration Protocol) server 240, a file server 250, and a personal computer (PC (Personal Computer)). 280) is also connected. In addition, a smartphone or a tablet terminal may be connected (not shown).

  The connection destination determination apparatus 100 includes a control unit 110, a storage unit 120, and an input / output unit 140. The input / output unit 140 includes a NIC (Network Interface Card) that transmits and receives data in addition to a user interface device such as a display and a keyboard.

  The control unit 110 includes a CPU (Central Processing Unit), and executes an OS (Operating System) and a connection destination determination program (not shown) stored in the storage unit 120, thereby connecting the connection destination determination device 100, which is a computer. To work. The control unit 110 includes an address acquisition unit 111 and a network determination unit 112.

  The address acquisition unit 111 acquires network addresses (for example, IP addresses) and physical addresses (for example, MAC addresses) of the default gateway 210 and the printer 220 connected to the network. Note that the default gateway 210 and the printer 220 are network devices (also simply referred to as devices) that are referred to when determining whether or not the connection destination network is a registered network.

The network determination unit 112 determines whether or not the connection destination network is a registered network stored in a sign device database (also referred to as a sign device DB (Database), which will be described later) 130 described later.
The storage unit 120 includes a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, and the like, and includes a sign device database 130.

<< First Embodiment: Sign Equipment Database >>
FIG. 2 is a diagram illustrating a data configuration of the sign device database 130 according to the first embodiment. The sign device database 130 is, for example, tabular data, and one record (row) indicates one sign device, and includes attributes (columns) of a type 131, a physical address 132, and a network address 133.

The type 131 indicates the type of the sign device. In the first embodiment, the type 131 is “default gateway” or “printer”.
The physical address 132 is a physical address of the sign device, for example, a MAC address.
The network address 133 is a network address of the sign device, for example, an IP address.

  A network in which the default gateway stored in the sign device database 130 and the printer are connected is a registered network. The connection destination determination apparatus 100 determines whether the network (connection destination network) to which the connection destination determination apparatus 100 is connected is a registered network. Hereinafter, a process of registering a network in the sign device database 130 (see FIG. 3 described later) and a process of determining whether or not the connection destination network is a registered network (see FIG. 4 described later) will be described.

<< First Embodiment: Network Registration Process >>
FIG. 3 is a flowchart of network registration processing according to the first embodiment. With reference to FIG. 3, a process performed by the address acquisition unit 111 for registering a determination target network in the sign device database 130 will be described. When the network registration process is executed, the connection destination determination apparatus 100 is connected to the registration target network and can communicate with the default gateway 210 and the printer 220.

  In step S <b> 101, the address acquisition unit 111 acquires the physical address and network address of the default gateway 210 and registers them in the sign device database 130. The address acquisition unit 111 may acquire the physical address and network address of the default gateway 210 by inquiring of the OS or may use DHCP or ARP (Address Resolution Protocol).

  After the acquisition, the address acquisition unit 111 checks whether communication with the default gateway 210 is possible using the acquired physical address and network address. Subsequently, the address acquisition unit 111 stores the acquired physical address and network address in the physical address 132 and network address 133 of the record whose type 131 is “default gateway”, respectively.

  In step S <b> 102, the address acquisition unit 111 acquires the physical address and network address of the printer 220 and registers them in the sign device database 130. The address acquisition unit 111 may acquire the physical address and network address of the printer 220 by inquiring of the OS, or acquire the name of the printer 220 from the OS and acquire it using a name resolution service or ARP. May be.

  After the acquisition, the address acquisition unit 111 checks whether communication with the printer 220 is possible using the acquired physical address and network address. Subsequently, the address acquisition unit 111 stores the acquired physical address and network address in the physical address 132 and network address 133 of the record whose type 131 is “printer”, respectively.

<< First Embodiment: Network Determination Process >>
FIG. 4 is a flowchart of the connection destination network determination process according to the first embodiment. A process executed by the address acquisition unit 111 and the network determination unit 112 to determine whether or not the connection destination network is a registered network will be described with reference to FIG.

  In step S201, the address acquisition unit 111 acquires the default gateway of the connection destination network and the network address and physical address of the printer. The acquisition procedure is the same as the network registration process (see FIG. 3).

  In step S202, the network determination unit 112 compares the address (connected device information) acquired in step S201 with the registered address (registered device information). Specifically, the network determination unit 112 acquires the default gateway and the printer physical address from the sign device database 130, and compares the default gateway and the printer physical address acquired in step S201, respectively. Note that if the physical address cannot be obtained or communication cannot be obtained in step S201, the physical addresses do not match.

  In step S203, the network determination unit 112 proceeds to any of steps S204, S205, S208, and S211 according to the comparison result of step S202. Specifically, if the default gateway physical address matches and the printer physical address also matches (GW: match, PRN: match), the network determination unit 112 proceeds to step S204. When the physical address of the default gateway matches and the physical address of the printer does not match (GW: match, PRN: mismatch), the network determination unit 112 proceeds to step S205. If the default gateway physical address does not match and the printer physical address matches (GW: mismatch, PRN: match), the network determination unit 112 proceeds to step S208. If the default gateway physical address does not match and the printer physical address does not match (GW: mismatch, PRN: mismatch), the network determination unit 112 proceeds to step S211.

In step S204, the network determination unit 112 determines that the connection destination network is a registered network.
In step S205, the network determination unit 112 determines that the connection destination network is a registered network.
In step S206, the network determination unit 112 proceeds to step S207 when the printer exists (when the address can be acquired and communication is possible) (step S206 → Y), and when the printer does not exist (step S206). → N) terminates the network determination process.

  In step S207, the network determination unit 112 updates the printer address. Specifically, the network determination unit 112 updates the physical address 132 and the network address 133 to the physical address and the network address acquired in step S201 in the printer record of the sign device database 130, respectively.

In step S208, the network determination unit 112 determines that the connection destination network is a registered network.
In step S209, the network determination unit 112 proceeds to step S210 when the default gateway exists (when the address can be acquired and communication is possible) (step S209 → Y), and when it does not exist (step S209). In S209 → N), the network determination process ends.

In step S210, the network determination unit 112 updates the address of the default gateway. Specifically, the network determination unit 112 updates the physical address 132 and the network address 133 to the physical address and the network address acquired in step S201 in the default gateway record of the sign device database 130, respectively.
In step S211, the network determination unit 112 determines that the connection destination network is an unregistered network (not a registered network).

<< First Embodiment: Features of Network Determination Process >>
The network determination unit 112 compares the default gateway and printer physical address of the connection destination network with the default gateway and printer physical address of the registered network, and only one of them matches, not only when both match. Even in such a case, it is determined that the connection destination network is a registered network. For this reason, even if one of the default gateway and the printer is exchanged and the physical address changes, it can be determined as a registered network. Even if one of the default gateway and the printer is not operating, it can be determined that the network is a registered network.

  In addition, since a new address is registered in the sign device database 130 (see steps S207 and S210), either the default gateway or the printer may be exchanged or not operating in the next network determination process. Can also be determined as a registered network.

<< Second Embodiment >>
In the first embodiment, the connection destination determination apparatus 100 refers to the default gateway and the physical address of the printer to determine whether the connection destination network is a registered network. The connection destination determination apparatus according to the second embodiment refers to the physical addresses of network devices (labeled devices) other than the default gateway and printer and determines whether the network is a registered network.

<< Second Embodiment: Overall Configuration of Connection Destination Determination Apparatus >>
FIG. 5 is a diagram illustrating the overall configuration of the connection destination determination apparatus 100A and the network configuration according to the second embodiment. Compared to the first embodiment (see FIG. 1), a plurality of printers 220 and 230 are provided.

The address acquisition unit 111 </ b> A acquires the addresses of the DHCP server 240 and the file server 250 in addition to the default gateway 210 and the printers 220 and 230.
The network determination unit 112A compares the physical addresses of the DHCP server 240 and the file server 250 in addition to the default gateway 210 and the printers 220 and 230, and determines whether or not the connection destination network is a registered network.

  FIG. 6 is a diagram illustrating a data configuration of the sign device database 130A according to the second embodiment. The sign device database 130 </ b> A stores the addresses of the DHCP server 240 and the file server 250 in addition to the default gateway 210 and the printers 220 and 230. Specifically, as the value of the type 131, there are “DHCP server” and “file server” in addition to “default gateway” and “printer”. In addition, since there are a plurality of printers 220 and 230, there are a plurality of records whose type 131 is “printer”.

<< Second Embodiment: Network Registration Process >>
FIG. 7 is a flowchart of network registration processing according to the second embodiment. With reference to FIG. 7, the process performed by the address acquisition unit 111A to register the network to be determined in the sign device database 130A will be described. When executing the network registration process, it is assumed that the connection destination determination apparatus 100A is connected to the registration target network and the default gateway 210, the printers 220 and 230, the DHCP server 240, and the file server 250 are operating.

In step S301, the address acquisition unit 111A acquires the physical address and network address of the default gateway 210 and registers them in the sign device database 130A. Acquisition and registration procedures are the same as those in step S101 (see FIG. 3).
In step S302, the address acquisition unit 111A acquires the physical addresses and network addresses of the printers 220 and 230 and registers them in the sign device database 130A. Acquisition and registration procedures are the same as those in step S102 (see FIG. 3).

  In step S303, the address acquisition unit 111A acquires the physical address and network address of the DHCP server 240 and registers them in the sign device database 130A. The address acquisition unit 111A may acquire the physical address and network address of the DHCP server 240 by inquiring of the OS, or may acquire using DHCP or ARP. The acquired physical address and network address are stored in the physical address 132 and the network address 133 of the record whose type 131 is “DHCP server”, respectively.

  In step S304, the address acquisition unit 111A acquires the physical address and network address of the file server 250 and registers them in the sign device database 130A. The address acquisition unit 111A may acquire the physical address and network address of the file server 250 by inquiring of the OS, or may acquire the name of the file server 250 from the OS and use a name resolution service or ARP. You may get it. The acquired physical address and network address are stored in the physical address 132 and the network address 133 of the record whose type 131 is “file server”, respectively.

<< Second Embodiment: Network Determination Process >>
FIG. 8 is a flowchart of the connection destination network determination process according to the second embodiment. With reference to FIG. 8, a process performed by the address acquisition unit 111A and the network determination unit 112A for determining whether or not the connected network is a registered network will be described.

  In step S401, the address acquisition unit 111A acquires the network address and physical address of the sign device (default gateway 210, printers 220 and 230, DHCP server 240, and file server 250) of the connection destination network. The acquisition procedure is the same as the network registration process (see FIG. 7).

  In step S402, the network determination unit 112A compares the address acquired in step S401 with the registered address. Specifically, the network determination unit 112A acquires the physical addresses of the default gateway, printer, DHCP server, and file server from the sign device database 130A, and the physical addresses of the default gateway, printer, DHCP server, and printer acquired in step S401, respectively. Compare. If the physical address cannot be obtained or communication cannot be obtained in step S401, the physical addresses of the devices do not match.

In step S403, the network determination unit 112A calculates the number of matching sign devices in the comparison in step S402.
In step S404, the network determination unit 112A proceeds to step S405 if the number of matches calculated in step S403 is equal to or greater than a predetermined threshold (step S404 → Y), and if the number of matches is less than the predetermined threshold (step S404). S404 → N) Proceed to step S408.

In step S405, the network determination unit 112A determines that the connection destination network is a registered network.
In step S406, the network determination unit 112A determines that there is a label device whose physical address does not match (when the address can be acquired, communication is possible, and the address is different) (step S406 → Y), the process proceeds to step S407. If it does not exist (step S406 → N), the network determination process is terminated.

In step S407, the network determination unit 112A updates the address of the sign device having a different address. Specifically, the network determination unit 112A updates the physical address 132 and the network address 133 with the physical address and the network address acquired in step S401 in the record of the sign device database 130A, respectively.
In step S408, the network determination unit 112A determines that the connection destination network is an unregistered network (not a registered network).

<< Second Embodiment: Features of Network Determination Process >>
The network determination unit 112A compares the physical addresses of the sign devices (default gateway, printer, DHCP server, and file server) of the connection destination network with the physical addresses of the sign devices of the registered network, and the number of matching sign devices is determined. If it is equal to or greater than a predetermined threshold, it is determined as a registered network. For this reason, even if a part of the sign device is replaced and the physical address changes, it can be determined as a registered network. Further, even if a part of the sign device is not in operation, it can be determined as a registered network.
In addition, since a new address is registered in the sign device database 130A (see step S407), even if a part of the sign device is replaced or is not operating in the subsequent network determination processing, it is determined as a registered network. can do.

<< Modification of Second Embodiment: Type of Sign Apparatus >>
The sign device in the second embodiment described above is a default gateway, a printer, or the like on the premise of always operating. The sign device may be a server that provides a network service such as a time server, a mail server, or a Web server. Further, a PC 280, a smartphone (not shown), or a tablet terminal (not shown) used by the end user may be added to the sign device. In order to acquire the address of the PC 280, the smartphone, or the tablet terminal, the address acquisition unit 111A may acquire the address by inquiring of the OS, or sequentially check the ARP and the network communication with respect to the network address included in the connection destination network. You may acquire using a protocol (For example, using ICMP (Internet Control Message Protocol)). Alternatively, the address acquisition unit 111A may acquire the address of the PC 280 from the sign device database 130A.

<< Modification of Second Embodiment: Addition of Marking Equipment >>
When it is determined that the connection destination network is a registered network, and there is a labeled device whose physical address does not match, the network determination unit 112A uses the address of the labeled device in the labeled device database 130A as the connection destination network. (See step S407 in FIG. 8). In addition to updating, the network determination unit 112A may add the address of the new sign device connected to the connection destination network to the sign device database 130A. For example, when the address acquisition unit 111A acquires the printer address in addition to the printer registered in the sign device database 130A as a result of inquiring of the OS, the network determination unit 112A assigns the printer address to the sign device database 130A. May be added to

<< Modified Example of Second Embodiment: Determination Threshold >>
The threshold value in step S404 may be a fixed value, a value corresponding to the number of sign devices stored in the sign device database 130A, or the sign device whose address has been acquired in step S401. It may be a value corresponding to the number. For example, half of the sign devices stored in the sign device database 130A may be set as the threshold value.

  Further, the threshold value may be divided between the server-type marker device and the non-server system (PC). For example, both the server system threshold value is half of the server system sign apparatus stored in the sign apparatus database 130A and the non-server system threshold value is 1/4 of the non-server system sign apparatus stored in the sign apparatus database 130A. You may determine with a registration network, when a threshold value is satisfy | filled.

<< Modification of Second Embodiment: Sign Equipment Database >>
The sign device database 130A includes the attribute of the type 131, but this may be eliminated. In this case, in the network registration process (see FIG. 7), the address acquisition unit 111A stores the physical address 132 of the sign device and the network address 133 in the sign device database 130A. In the network determination process (see FIG. 8), the network determination unit 112A does not compare the number of devices with matching addresses with a threshold value (steps S402 to S404), but includes a device whose address is included in the sign device database 130A. Is compared with a threshold value. Further, instead of updating the address of the sign device whose address does not match (steps S406 to S407), the address is added to the sign device database 130A.

<< Modification of Second Embodiment: Sign Information of Sign Equipment >>
In the first and second embodiments, assuming that the physical address is the sign information of the sign device (also referred to as unique information, device information, and device information), the physical address is registered in the sign device databases 130 and 130A, and the connection destination Used for network judgment. Instead of the physical address, unique information corresponding to the type of device or manufacturer may be used. For example, the address acquisition unit (information acquisition unit) 111A may acquire the serial number of the device using SNMP (Simple Network Management Protocol) and use it as unique information.

<< Third Embodiment >>
In the second embodiment, the connection destination determination device 100A determines whether the connection destination network is a registered network with reference to the physical address of the sign device. The connection destination determination apparatus according to the third embodiment determines whether there are a plurality of registered networks and which registered network is an unregistered network.

«Third embodiment: overall configuration of connection destination determination device»
FIG. 9 is a diagram illustrating an overall configuration of a connection destination determination apparatus 100B according to the third embodiment and a plurality of registered networks. In the third embodiment, the sign device addresses of the plurality of networks 291 to 293 are registered in the sign device database 130B, and the network determination unit 112B uses any of the registered networks as the connection destination network. Determine if there is an unregistered network.

The address acquisition unit 111B acquires the addresses of the sign devices (default gateway, printer, DHCP server, and file server) of the connection destination network.
The network determination unit 112B compares the physical address of the sign device in the connection destination network with the physical address registered in the sign device database 130B, and determines which registered network is the connection destination network or an unregistered network. judge.

  FIG. 10 is a diagram illustrating a data configuration of the sign device database 130B according to the third embodiment. Compared with the sign device database 130A (see FIG. 6), the sign device database 130B includes an attribute of the network 134 that is identification information of the registered network. For example, the sign device indicated by the record in the first row of FIG. 10 is a sign device of the network whose identification information is “NET1”, the type 131 is “default gateway”, and the physical address 132 is “4f”. -3d-e9-34-aa-8d "and the network address is" 123.45.67.1 ".

<< Third Embodiment: Network Registration Process >>
For each of the networks 291 to 293 to be registered, the network registration process is executed in a state where the connection destination determination device 100B is connected to each network. Network registration processing in each of the networks 291 to 293 is the same as the network registration processing (see FIG. 7) in the second embodiment, except for registration in the sign device database 130B. Specifically, the address acquisition unit 111B includes the network 134 that is identification information of the connection destination network (network to be registered) in addition to the type 131, the physical address 132, and the network address 133 after acquiring the address of the sign device. Information on the sign device is stored in the sign device database 130B.

<< Third Embodiment: Network Determination Process >>
FIG. 11 is a flowchart of the connection destination network determination process according to the third embodiment. A process executed by the address acquisition unit 111B and the network determination unit 112B to determine whether or not the connected network is a registered network will be described with reference to FIG.

  In step S501, the address acquisition unit 111B acquires the network address and physical address of the sign device of the connection destination network. The acquisition procedure is the same as the network registration process (see FIG. 7).

  In step S502, the network determination unit 112B repeats the processing of steps S503 to S505 (hereinafter also referred to as loop processing) for each network registered in the sign device database 130B. For example, there are “NET1”, “NET2” and “NET3” as the values of the network 134 in the sign device database 130B shown in FIG. 10, and the addresses of the sign devices connected to these three networks are stored in the sign device database 130B. Stored. The network determination unit 112B repeats the loop processing of steps S503 to S505 for each of “NET1”, “NET2”, and “NET3”.

  In step S503, the network determination unit 112B compares the address acquired in step S501 with the registered address of the loop processing target network. Specifically, the network determination unit 112B acquires the physical addresses of the default gateway, printer, DHCP server, and file server of the network to be loop processed (“NET1”, “NET2”, or “NET3”) from the sign device database 130B. The default gateway, printer, DHCP server, and printer physical addresses acquired in step S501 are respectively compared. If the physical address cannot be acquired or communication cannot be performed in step S501, the physical addresses are not matched.

In step S504, the network determination unit 112B calculates the number of sign devices that match in the comparison in step S503.
In step S505, the network determination unit 112B proceeds to step S508 if the number of matches calculated in step S504 is equal to or greater than a predetermined threshold (step S505 → Y), and if the number of matches is less than the predetermined threshold (step S505). S505 → N) Proceed to step S506.

  In step S506, the network determination unit 112B determines whether the loop processing in steps S503 to S505 has been executed for all networks registered in the sign device database 130B. If loop processing has been executed for all networks, the process proceeds to step S507. If there is an unprocessed network, the process returns to step S503 for the network.

In step S507, the network determination unit 112B determines that the connection destination network is an unregistered network (not a registered network).
In step S508, the network determination unit 112B determines that the connection destination network is a registered network that is undergoing loop processing.
Steps S509 and S510 are the same processes as steps S406 and S407, respectively. However, the record whose address is updated is a record in which the network 134 is a network to be loop-processed.

<< Third Embodiment: Features of Network Determination Process >>
The network determination unit 112B sequentially compares the physical address of the sign device of the connection destination network with the physical address of the sign device of the network for a plurality of registered networks, and if the number of matching sign devices is equal to or greater than a predetermined threshold value. If it is, the network is determined. For this reason, even if a plurality of networks are registered, it is possible to determine which registered network is an unregistered network as a connection destination network.

<< Fourth Embodiment >>
In the first to third embodiments, the connection destination determination devices 100, 100A, and 100B determine whether the connection destination network is a registered network with reference to the physical address of the sign device. In the fourth embodiment, the mobile terminal acquires the address of the sign device of the connection destination network and transmits it to the device information collection server, and the device information collection server determines whether the connection destination network is a registered network. To do.

<< Fourth Embodiment: Overall Configuration >>
FIG. 12 is a diagram illustrating the overall configuration of the mobile terminal (terminal) 100C and the overall configuration of the device information collection server (connection destination determination server) 300 according to the fourth embodiment. The control unit 110C of the mobile terminal 100C includes an address acquisition unit 111C and a device information acquisition unit 113. The address acquisition unit 111C is the same as the address acquisition unit 111A (see FIG. 5) except that the acquired labeling device address is transmitted to the device information collection server 300 described later. The mobile terminal 100C does not include a network determination unit or a sign device database.
The device information acquisition unit 113 acquires device information such as the device name, software configuration, and setting information of the device connected to the connection destination network, and transmits the device information to the device information collection server 300.

  The device information collection server 300 is connected to the mobile terminal 100C via the default gateway 210 or the Internet. The device information collection server 300 includes a control unit 310 configured by a CPU, a storage unit 320 configured by a RAM, an HDD (Hard Disk Drive), and the like, and an input / output unit 350 configured by a NIC. The control unit 310 stores the device information transmitted by the mobile terminal 100C in a device information database (device information DB) 340 described later.

The network determination unit 312 and the sign device database 330 are the same as the network determination unit 112A (see FIG. 5) and the sign device database 130A (see FIG. 6) in the second embodiment, respectively, and are acquired and transmitted by the mobile terminal 100C. Based on the address information of the marked device, it is determined whether or not the connection destination network of the mobile terminal 100C is a registered network.
The device information database 340 is a database that stores names and software of devices connected to the connection destination network acquired and transmitted by the mobile terminal 100C.

<< Fourth Embodiment: Network Registration Process >>
The address acquisition unit 111C acquires the address of the sign device of the connection destination network and transmits it to the device information collection server 300. The control unit 310 of the device information collection server 300 stores the received address information in the sign device database 330.

<< Fourth Embodiment: Network Determination Process >>
The address acquisition unit 111C acquires the address of the sign device of the connection destination network and transmits it to the device information collection server 300. In addition, the device information acquisition unit 113 acquires device information of a device connected to the connection destination network, and transmits the device information to the device information collection server 300.
The network determination unit 312 of the device information collection server 300 determines whether or not the connection destination network of the mobile terminal 100C is a registered network based on the received address information of the labeled device and the information of the labeled device database 330 ( (Processing similar to steps S402 to S405 in FIG. 4). If it is determined that the network is a registered network, the control unit 310 stores the received device information in the device information database 340. Furthermore, the network determination unit 312 updates the address information of the sign device whose address does not match (the same processing as steps S406 and S407 in FIG. 4).

<< Features of Fourth Embodiment >>
The device information collection server 300 stores in the device information database 340 only device information of devices that are device information collection targets and connected to the registered network. As a result, it is possible to prevent the collection of information on devices that do not need to be collected connected to the home network or public network of the user of the mobile terminal 100C.

100, 100A, 100B Connection destination determination device 100C Mobile terminal (terminal)
111, 111A, 111B, 111C Address acquisition unit (information acquisition unit)
112, 112A, 112B, 312 Network determination unit 130, 130A, 130B, 330 Sign device database 210 Default gateway (sign device, network device)
220, 230 Printer (sign device, network device)
240 DHCP server (sign equipment, network equipment)
250 File server (sign device, network device)
300 Device information collection server (connection destination determination server)

Claims (5)

A connection destination determination device that determines whether a connected network is a registered network,
A storage unit for storing a plurality of registered device information indicating information of a predetermined type of network device connected to the registered network;
An information acquisition unit for acquiring connected device information indicating information of the predetermined type of network device connected to the connected network;
When the number of network devices in which the registered device information and the connected device information match or the number of network devices in which the connected device information is included in the registered device information is equal to or greater than a predetermined threshold, the connection And a network determination unit that determines that the network is the registered network. The network determination unit
When it is determined that the connected network is the registered network, the registered device information that does not match the connected device information is changed to the connected device information, or the connected device information is added to the registered device information. The connection destination determination device according to claim 1, wherein the connection destination determination device is added. The type of the network device is any of a default gateway, a printer, and a server that provides a network service,
The connection destination determination apparatus according to claim 1, wherein the information on the network device is a physical address of the network device.   The connection destination determination program for functioning a computer as a connection destination determination apparatus of any one of Claims 1-3. A connection destination determination system configured by a terminal and a connection destination determination server capable of communicating with the terminal and determining whether a network to which the terminal is connected is a registered network;
The terminal
An information acquisition unit that acquires connection device information indicating information of a predetermined type of network device connected to the connected network, and transmits the connection device information to the connection destination determination server;
The connection destination determination server is
A storage unit for storing a plurality of registered device information indicating information of the predetermined type of network device connected to the registered network;
When the number of network devices in which the registered device information and the connected device information match or the number of network devices in which the connected device information is included in the registered device information is equal to or greater than a predetermined threshold, the connection And a network determination unit that determines that the network is the registered network.

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