JP7049885B2 - Connection destination judgment device, connection destination judgment program and connection destination judgment system - Google Patents

Description

The present invention relates to a connection destination determination device, a connection destination determination program, and a connection destination determination system for determining whether or not the network to which a terminal is connected is a registered network.

It is common to carry a mobile device (terminal) such as a personal computer, tablet, or smartphone and connect it to the destination network for use.
Depending on the usage pattern, it is necessary to determine which network the connected network is. For example, in order to collect information on information devices in order to manage the assets of the company's information devices, it is necessary to collect the information only when connected to the company's LAN (Local Area Network). If you collect information when you connect to a public wireless LAN or your home network, even devices that are not your own assets will be registered as your own assets, and confidential information such as personal information that should not be collected originally / privately Problems such as collecting information will occur.

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

As a technique for determining which network the terminal is connected to, Patent Document 1 describes an IP (Internet Protocol) address assigned to the terminal and a continuity test with a specific server. , The technology to recognize the connected network environment is described. Further, Patent Document 2 describes a technique for specifying a connection position by a MAC (Media Access Control) address of a default gateway of a connected network.

Re-table 2007-007546 JP-A-2007-018479

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

As a result, inappropriate information is collected in the previous example of information device asset management, or a firewall is erroneously set and unauthorized access is received. In addition, if the terminal is operating normally, the replacement of the default gateway and the change of the network setting may go unnoticed, and the user may not notice that the judgment is erroneous. Therefore, there is a need for a network determination method that can respond to 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 is a connection destination determination device and a connection destination determination program capable of determining a connection destination network even if the configuration of the connection destination network is changed. An object of the present invention is to provide a connection destination determination system.

In order to solve the above-mentioned problems, the invention according to claim 1 is a connection destination determination device for determining whether or not the 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 whose connected device information is included in the registered device information is equal to or greater than a predetermined threshold, the connected network is registered. The network determination unit includes a network determination unit that determines that the network is a network, and the network determination unit uses the registered device information that does not match the connected device information when the connected network is determined to be the registered network. The connection destination determination device is characterized by changing to the connected device information or adding the connected device information to the registered device information .

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 if the configuration of the connection destination network changes.

It is a figure which illustrates the overall structure of the connection destination determination device and the structure of a network which concerns on 1st Embodiment. It is a figure which illustrates the data structure of the signing 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 overall structure of the connection destination determination device and the structure of a network which concerns on 2nd Embodiment. It is a figure which illustrates the data structure of the signing 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 connection destination determination apparatus which concerns on 3rd Embodiment, and a plurality of registration networks. It is a figure which illustrates the data structure of the signing 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 a figure exemplifying the whole configuration of the mobile terminal and the whole configuration of the device information collection server which concerns on 4th Embodiment.

<< First Embodiment >>
The connection destination determination device (connection destination network determination device) in the embodiment (embodiment) for carrying out the present invention will be described below. Whether or not the connection destination determination device in the first embodiment is a registered network (registered network) by referring to the default gateway of the connection destination network (connection destination network) and the physical (MAC) address of the printer. Is determined.

<< First Embodiment: Overall configuration of connection destination determination device >>
FIG. 1 is a diagram illustrating an overall configuration and a network configuration of the connection destination determination device 100 according to the first embodiment. In addition to the connection destination determination device 100, the network includes a default gateway (also referred to as a 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)). Also referred to as) 280 is connected. In addition, a smartphone or tablet terminal may be connected (not shown).

The connection destination determination device 100 includes a control unit 110, a storage unit 120, and an input / output unit 140. The input / output unit 140 includes a user interface device such as a display and a keyboard, and a NIC (Network Interface Card) for transmitting and receiving data.

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

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

The network determination unit 112 determines whether or not the connection destination network is a registered network stored in the marking device database (also referred to as a marking device DB (Database), see FIG. 2) 130 described later.
The storage unit 120 is composed of a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, and the like, and includes a marking device database 130.

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

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

The network to which the default gateway and the printer stored in the indicator device database 130 are connected is the registration network. The connection destination determination device 100 determines whether or not the network (connection destination network) to which the connection destination determination device 100 is connected is a registered network. Hereinafter, a process of registering a network in the indicator 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 the network registration process according to the first embodiment. With reference to FIG. 3, a process of registering the network to be determined, which is executed by the address acquisition unit 111, in the indicator device database 130 will be described. When the network registration process is executed, the connection destination determination device 100 is connected to the network to be registered and can communicate with the default gateway 210 and the printer 220.

In step S101, the address acquisition unit 111 acquires the physical address and the network address of the default gateway 210 and registers them in the indicator device database 130. The address acquisition unit 111 may acquire the physical address and network address of the default gateway 210 by inquiring the OS, or may acquire them by using DHCP or ARP (Address Resolution Protocol).

After the acquisition, the address acquisition unit 111 confirms 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 the network address 133 of the record whose type 131 is the “default gateway”, respectively.

In step S102, the address acquisition unit 111 acquires the physical address and the network address of the printer 220 and registers them in the indicator device database 130. The address acquisition unit 111 may acquire the physical address and network address of the printer 220 by inquiring to the OS, or acquires the name of the printer 220 from the OS and acquires it by using a name resolution service or ARP. You may.

After the acquisition, the address acquisition unit 111 confirms 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 the 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. With reference to FIG. 4, a process of determining whether or not the connection destination network is a registered network, which is executed by the address acquisition unit 111 and the network determination unit 112, will be described.

In step S201, the address acquisition unit 111 acquires the network address and physical address of the default gateway and the printer of the connection destination network. 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 physical addresses of the default gateway and the printer from the indicator device database 130, and compares them with the physical addresses of the default gateway and the printer acquired in step S201, respectively. If the physical address cannot be acquired or communication cannot be performed in step S201, the physical addresses do not match.

In step S203, the network determination unit 112 proceeds to any one of steps S204, S205, S208, and S211 according to the comparison result of step S202. Specifically, when the physical address of the default gateway matches and the physical address of the printer also matches (GW: match, PRN: match), the network determination unit 112 proceeds to step S204. If 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 physical addresses of the default gateways do not match and the physical addresses of the printers match (GW: mismatch, PRN: match), the network determination unit 112 proceeds to step S208. If the physical address of the default gateway does not match and the physical address of the printer 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). → In N), the network determination process is terminated.

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 indicator 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 is terminated.

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 with the physical address and the network address acquired in step S201 in the record of the default gateway of the indicator 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 Judgment Processing >>
The network determination unit 112 compares the physical addresses of the default gateway and the printer of the connection destination network with the physical addresses of the default gateway and the printer of the registered network, respectively, and not only when both match, but only one of them matches. Even if this is the case, the connection destination network is determined to be the registered network. Therefore, 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. Further, even if one of the default gateway and the printer is not in operation, it can be determined as a registered network.

Further, since the new address is registered in the indicator device database 130 (see steps S207 and S210), one of the default gateway and the printer may be exchanged or not in operation in the next and subsequent network determination processes. Can also be determined to be a registered network.

<< Second Embodiment >>
In the first embodiment, the connection destination determination device 100 determines whether or not the connection destination network is a registered network by referring to the physical addresses of the default gateway and the printer. The connection destination determination device in the second embodiment refers to the physical address of the network device (marking device) other than the default gateway and the printer, and determines whether or not the network is a registered network.

<< Second Embodiment: Overall configuration of connection destination determination device >>
FIG. 5 is a diagram illustrating an overall configuration and a network configuration of the connection destination determination device 100A according to the second embodiment. Compared with the first embodiment (see FIG. 1), there are a plurality of printers 220 and 230.

The address acquisition unit 111A 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 the data structure of the marking device database 130A according to the second embodiment. The indicator database 130A 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 a "DHCP server" and a "file server" in addition to the "default gateway" and the "printer". Further, 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 the network registration process according to the second embodiment. With reference to FIG. 7, a process of registering the network to be determined, which is executed by the address acquisition unit 111A, in the indicator device database 130A will be described. At the time of executing the network registration process, it is assumed that the connection destination determination device 100A is connected to the network to be registered, and the default gateway 210, the printers 220, 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 the network address of the default gateway 210 and registers them in the indicator device database 130A. The procedure for acquisition and registration is the same as in step S101 (see FIG. 3).
In step S302, the address acquisition unit 111A acquires the physical address and the network address of the printers 220 and 230 and registers them in the marking device database 130A. The procedure for acquisition and registration is the same as 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 indicator device database 130A. The address acquisition unit 111A may acquire the physical address and the network address of the DHCP server 240 by inquiring the OS, or may acquire them by 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 the network address of the file server 250 and registers them in the indicator device database 130A. The address acquisition unit 111A may acquire the physical address and network address of the file server 250 by inquiring the OS, or 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 of determining whether or not the connected network is a registered network, which is executed by the address acquisition unit 111A and the network determination unit 112A, will be described.

In step S401, the address acquisition unit 111A acquires the network address and the physical address of the indicator device (default gateway 210, printer 220, 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, the printer, the DHCP server, and the file server from the indicator device database 130A, and the physical addresses of the default gateway, the printer, the DHCP server, and the printer acquired in step S401, respectively. Compare. If the physical address cannot be acquired or communication is not possible in step S401, the physical address of the device is considered to be inconsistent.

In step S403, the network determination unit 112A calculates the number of matching labeling 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 goes to step S407 when there is a marker device whose physical address does not match (when the address can be acquired, communication is possible, and the address is different) (step S406 → Y). If it proceeds and 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 indicator 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 indicator 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 processing >>
The network determination unit 112A compares the physical addresses of the indicator devices (default gateway, printer, DHCP server, and file server) of the connection destination network with the physical addresses of the indicator devices of the registered network, and the number of matching indicator devices is the same. If it is equal to or higher than a predetermined threshold, it is determined to be a registered network. Therefore, even if a part of the marking device is exchanged and the physical address changes, it can be determined as a registered network. Further, even if a part of the marking device is not in operation, it can be determined as a registered network.
Further, since the new address is registered in the marker device database 130A (see step S407), it is determined that the address is a registered network even if a part of the indicator device is replaced or is not in operation in the network determination process from the next time onward. can do.

<< Modification example of the second embodiment: Type of labeling device >>
The marking device in the second embodiment described above is a default gateway, a printer, or the like, which is premised on constant operation. The indicator device may be a server that provides a network service such as a time server, a mail server, and 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 marking device. In order to acquire the address of the PC280, smartphone, or tablet terminal, the address acquisition unit 111A may inquire of the OS to acquire the address, or the network address included in the connection destination network is sequentially confirmed by ARP and network communication. It may be acquired 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 marking device database 130A.

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

<< Modification example of the second embodiment: Threshold value for determination >>
The threshold value in step S404 may be a fixed value, a value corresponding to the number of marking devices stored in the marking device database 130A, or the marking device whose address can be acquired in step S401. It may be a value according to the number. For example, half of the marking devices stored in the marking device database 130A may be used as the threshold value.

Further, the threshold value may be divided between the server-based indicator device and the non-server-based (PC). For example, the threshold of the server system is set to half of the server-based marking devices stored in the marking device database 130A, and the threshold of the non-server system is set to 1/4 of the non-server-based marking device stored in the marking device database 130A. When the threshold is satisfied, it may be determined as a registered network.

<< Modification example of the second embodiment: Labeling device database >>
The marking device database 130A includes the attribute of 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 and the network address 133 of the marking device in the marking device database 130A. Further, in the network determination process (see FIG. 8), the network determination unit 112A does not compare the number of devices having the same address with the threshold value (steps S402 to S404), but the device whose address is included in the indicator device database 130A. Compare the number of to the threshold. Further, instead of updating the address of the indicator device whose address does not match (steps S406 to S407), the address is added to the indicator device database 130A.

<< Modification example of the second embodiment: Marking information of the marking device >>
In the first and second embodiments, assuming that the physical address is the marking information of the marking device (also referred to as unique information, device information, and device information), the physical address is registered in the marking device databases 130 and 130A, and the connection destination is connected. It is used to judge the network. Instead of the physical address, unique information according to the type of device and the 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 refers to the physical address of the marking device and determines whether or not the connection destination network is a registered network. The connection destination determination device in the third embodiment determines whether the connection destination network is a registered network or an unregistered network because there are a plurality of registered networks.

<< Third Embodiment: Overall configuration of connection destination determination device >>
FIG. 9 is a diagram showing an overall configuration of the connection destination determination device 100B and a plurality of registered networks according to the third embodiment. In the third embodiment, the addresses of the marking devices of the plurality of networks 291 to 293 are registered in the marking device database 130B, and the network determination unit 112B uses any of the registered networks as the connection destination network. Determine if the network is present or unregistered.

The address acquisition unit 111B acquires the addresses of the indicator 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 indicator device of the connection destination network with the physical address registered in the indicator device database 130B, and determines which registered network or the unregistered network the connection destination network is. judge.

FIG. 10 is a diagram illustrating the data structure of the marking device database 130B according to the third embodiment. Compared to the marking device database 130A (see FIG. 6), the marking device database 130B is configured to include the attributes of the network 134, which is the identification information of the registered network. For example, the indicator device shown in the record on the first line of FIG. 10 is a network indicator device whose identification information is "NET1", the type 131 is "default gateway", and its physical address 132 is "4f". -3d-e9-34-aa-8d ", indicating that 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. The network registration process in each of the networks 291 to 293 is the same as the network registration process (see FIG. 7) in the second embodiment except for the registration in the indicator device database 130B. Specifically, the address acquisition unit 111B includes the network 134, which is the identification information of the connection destination network (the 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 indicator device. Information on the marking device is stored in the marking 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. With reference to FIG. 11, a process of determining whether or not the connected network is a registered network, which is executed by the address acquisition unit 111B and the network determination unit 112B, will be described.

In step S501, the address acquisition unit 111B acquires the network address and the physical address of the indicator 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 processes of steps S503 to S505 (hereinafter, also referred to as loop processes) for each of the networks registered in the marker device database 130B. For example, the values of the network 134 of the indicator device database 130B shown in FIG. 10 include "NET1", "NET2", and "NET3", and the addresses of the indicator devices connected to these three networks are in the indicator device database 130B. It is 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 network to be looped. 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 looped (“NET1”, “NET2”, or “NET3”) from the indicator device database 130B. It is compared with the physical addresses of the default gateway, the printer, the DHCP server and the printer acquired in step S501, respectively. If the physical address cannot be acquired or communication cannot be performed in step S501, the physical addresses do not match.

In step S504, the network determination unit 112B calculates the number of matching labeling devices 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 or not the loop processing of steps S503 to S505 has been executed for all the networks registered in the marking device database 130B. If the loop processing has been executed for all the networks, the process proceeds to step S507, and if there are unprocessed networks, the process returns to step S503 for the networks.

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 during loop processing.
Steps S509 and S510 are the same processes as steps S406 and S407, respectively. However, the record for updating the address is a record in which the network 134 is the target network for loop processing.

<< Third Embodiment: Features of network determination processing >>
The network determination unit 112B sequentially compares the physical address of the indicator device of the connection destination network with the physical address of the indicator device of the network for a plurality of registered networks, and if the number of matching indicator devices is equal to or more than a predetermined threshold value. If so, it is determined to be the network. Therefore, even if a plurality of networks are registered, it is possible to determine which registered network or unregistered network the connection destination network is.

<< Fourth Embodiment >>
In the first to third embodiments, the connection destination determination devices 100, 100A, and 100B refer to the physical address of the marking device to determine whether the connection destination network is a registered network. In the fourth embodiment, the mobile terminal acquires the address of the indicator device of the connection destination network and sends it to the device information collection server, and the device information collection server determines whether or not the connection destination network is a registered network. 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 address of the indicator device is transmitted to the device information collection server 300 described later. The mobile terminal 100C does not have a network determination unit or a marker 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 and the Internet. The device information collection server 300 includes a control unit 310 composed of a CPU, a storage unit 320 composed of a RAM, an HDD (Hard Disk Drive), and an input / output unit 350 composed of a NIC. The control unit 310 stores the device information transmitted by the mobile terminal 100C in the device information database (device information DB) 340 described later.

The network determination unit 312 and the marking device database 330 are the same as the network determination unit 112A (see FIG. 5) and the marking 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 indicator 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 the 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 indicator 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 indicator device database 330.

<< Fourth Embodiment: Network determination process >>
The address acquisition unit 111C acquires the address of the indicator device of the connection destination network and transmits it to the device information collection server 300. Further, the device information acquisition unit 113 acquires the device information of the device connected to the connection destination network and transmits it 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 indicator device and the information of the indicator device database 330 (). The same process as 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. Further, the network determination unit 312 updates the address information of the indicator device whose address does not match (the same process as in steps S406 and S407 of FIG. 4).

<< Features of the Fourth Embodiment >>
The device information collection server 300 stores only the device information of the device that is the target of device information collection and is connected to the registered network in the device information database 340. This makes it possible to prevent the user of the mobile terminal 100C from collecting information on a device that does not need to be collected and is connected to a network at home, a public network, or the like.

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 Marking device database 210 Default gateway (marking device, network device)
220, 230 printers (marking equipment, network equipment)
240 DHCP server (marking equipment, network equipment)
250 file server (marking device, network device)
300 Device information collection server (connection destination judgment server)

Claims (4)

It is a connection destination determination device that determines whether or not the connected network is a registered network.
A storage unit that stores a plurality of registered device information indicating information of a predetermined type of network device connected to the registered network, and a storage unit.
An information acquisition unit that acquires connected device information indicating information on the predetermined type of network device connected to the connected network, and an information acquisition unit.
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 value, the connection is made. It is provided with 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. to add
A connection destination determination device characterized by this. The type of network device is one of a default gateway, a printer, and a server that provides network services.
The connection destination determination device according to claim 1 , wherein the information of the network device is a physical address of the network device. A connection destination determination program for causing a computer to function as the connection destination determination device according to any one of claims 1 and 2 . A connection destination determination system composed of a terminal and a connection destination determination server that can communicate with the terminal and determines whether or not the network to which the terminal is connected is a registered network.
The terminal is
It is provided with an information acquisition unit that acquires connected device information indicating information of a predetermined type of network device connected to the connected network and transmits the information to the connection destination determination server.
The connection destination determination server is
A storage unit that stores a plurality of registered device information indicating information of the predetermined type of network device connected to the registered network, and a storage unit.
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 value, the connection is made. A connection destination determination system including a network determination unit for determining that the network is a registered network.

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