JP2002169763A - Data transfer system and remote managing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system which urges the transmission of data from a managing server side at the time of connecting a network and more safely and securely receives data. SOLUTION: In a remote managing system 1, an HTTP server 31 requests data transmission from a network connector 11 by using a mail. The network connector 11 transmits data to the HTTP server 31 by using HTTP. The HTTP server 31 generates a directory for receiving data in a storage part 43 at the time of sending a mail requesting data transmission from the network connector 11. A control part 25 transmits the mail including directory information to the network connector 11 in a mail transmission part 41. The control part 25 of the network connector 11 recognizes the content of the mail when a mail reception part 24 receives the mail. Prescribed data are transmitted to the directory generated in the storage part 43 of the HTTP server 31 based on received directory information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a remote management system for network-connected devices using the Internet.

[0002]

2. Description of the Related Art As a system for exchanging data between devices via the Internet, a LAN, a WAN (Wide Area Communication Network) or the like, the following systems have been disclosed.

[0003] That is, Japanese Patent Application Laid-Open No. H11-234271 discloses a remote fault management system using the Internet, which reliably transmits data from a network connection device connected via the Internet to a management server using HTTP. I have. Also, JP-A-2000-4795
No. 5 discloses processing in the LAN by e-mail.
A program execution information processing system by electronic mail used from outside the AN is disclosed.

[0004]

However, in the remote fault management system using the Internet disclosed in Japanese Patent Application Laid-Open No. H11-234271, communication is possible only from the network connection device side, and the management server (HTTP server) is simply sent. I just received the data.

In the program execution information processing system using electronic mail disclosed in Japanese Patent Application Laid-Open No. 2000-47955, the processing can be started through a firewall, but the processing result is also returned by mail. As described above, since the mail is used for starting the processing and returning the processing result, there is a problem that the stability is lacking. That is, when mail is transmitted from a wide area communication network outside the LAN, the mail may be lost, and thus lacks stability. Further, when data is transmitted and received with the same mail address, there is a problem that the risk of unauthorized access to data and interception of data is increased.

Accordingly, the present invention has been made to solve the above problem, and its object is to provide a management server (H
An object of the present invention is to provide a system capable of prompting the transmission of data from a TTP server) at the time of network connection and receiving the data more securely and securely.

[0007]

The present invention has the following arrangement as means for solving the above-mentioned problems.

(1) A data transfer system including a first device and a second device connected via a network including the Internet, wherein the first device communicates with at least the second device and HTTP. HTT to communicate using
P communication means, and mail transmission means for transmitting at least the data transmission request mail to the second device, the second device comprising: a mail reception means for receiving the data transmission request mail; Alternatively, HTTP transmission means for transmitting at least the data requested to be transmitted to the first device using HTTP is provided.

In this configuration, the data transfer system includes an HTTP communication unit that performs communication using HTTP, a first device that includes at least a mail transmission unit that transmits a data transmission request mail to a second device, and a data transmission system. A mail receiving unit for receiving a transmission request mail, and transmitting predetermined data or data requested to be transmitted to at least the first device.
Second equipped with HTTP transmission means for transmitting using TTP
, And are connected via the Internet. Therefore, from the first device to the second
A data transfer request is sent to the first device using e-mail, and the second device can send data to the first device using HTTP. It becomes possible to send.

(2) A remote management system including a server device and a network connection device connected via a network including the Internet, wherein the server device includes:
HTTP communication means for communicating with at least the network connection device using HTTP, mail transmission means for transmitting at least a data transmission request mail to the network connection device, and server control means for controlling each of the means, The network connection device includes: a mail receiving unit configured to receive the data transmission request mail; an HTTP transmission unit configured to transmit predetermined data or data requested to be transmitted to at least the server device using HTTP; Device control means for performing the operation.

[0011] In this configuration, the remote management system includes:
H that communicates with the network connection device using HTTP
A server device including a TTP communication unit, a mail transmission unit that transmits a data transmission request mail to a network connection device, and a server control unit that controls each unit; a mail reception unit that receives a data transmission request mail; It includes an HTTP transmission unit that transmits the requested data to the server device using HTTP, and a network connection device including a device control unit that controls each unit, and these are connected via the Internet. Therefore, the server device requests the network-connected device to transfer data using e-mail, and the network-connected device transmits data to the server device using HTTP. Therefore, the server device starts data transfer from the server device to the network-connected device. It is possible to transfer the data to the server device without fail.

(3) The server device includes server storage means for storing data, and the server control means generates a directory for receiving data from the network connection device in the server storage means, and stores identification information of the generated directory. The mail transmitting unit transmits the data to the network-connected device, and the device control unit transmits the data by the HTTP transmitting unit to a directory generated in the server storage unit corresponding to the identification information received by the mail receiving unit. It is characterized by doing.

With this configuration, in the remote management system, the server control means of the server device having the server storage means for storing data generates a directory for receiving data from the network connection device in the server storage means,
The identification information of the generated directory is transmitted to the network connection device by the mail transmission unit, and the device control unit of the network connection device stores the directory in the server storage unit corresponding to the identification information received by the mail reception unit,
The data is transmitted by the HTTP transmission means. Therefore, the server device creates a directory for receiving data when receiving data. Therefore, the directory for receiving data is not fixed, so that unauthorized access to the received data from outside or manipulation of the received data can be prevented. This can be prevented.

(4) The server control means generates a request designating data received from the network connection device, transmits the generated request to the network connection device by the mail transmission means, and the device control means Information corresponding to the request received by the mail receiving means is transmitted by the HTTP transmitting means.

In this configuration, in the remote management system, the server control means of the server device generates a request designating data to be received from the network connection device, transmits the generated request to the network connection device by mail transmission means, The device control unit of the connected device transmits information corresponding to the request received by the mail reception unit by the HTTP transmission unit. Therefore, the server device can receive only the data specified by the request from the network connection device.

(5) The server control means generates a request for controlling the network connection device from a remote place, transmits the generated request to the network connection device by the mail transmission means, and the device control means ,
An operation corresponding to the request received by the mail receiving means is performed.

In this configuration, in the remote management system, the server control means of the server device generates a request for remotely controlling the network connection device, transmits the generated request to the network connection device by the mail transmission unit, and The device control means of the connected device includes:
An operation corresponding to the request received by the mail receiving means is executed. Therefore, the server device can remotely control the network connection device using the request.

(6) The server device and the network connection device each include a table in which a name of a directory for receiving data by the server device is associated with identification information, and the server control means generates a pseudo-random number; The identification number using the pseudo random number is used as directory identification information.

In this configuration, in the remote management system, the server device and the network connection device each have a table in which the name of the directory in which the server device receives data and the identification information correspond to each other. Generates a pseudo-random number and uses the identification number using this pseudo-random number as directory identification information.
Therefore, even if a mail is illegally intercepted from the outside, it is possible to prevent the directory name for transferring data from being known.

(7) The network-connected device includes device storage means for storing pseudo-random seed data, and the server storage means stores the same pseudo-random seed data as the device storage means. The means generates a pseudo-random number from the seed data, generates a request specifying data to be received from the pseudo-random number sequence, notifies the start position and the sequence length in the pseudo-random number sequence as the request, and the device control means A pseudorandom number is generated from the seed data in the device storage means, and the request is identified based on the pseudorandom number and the notification information from the server control means.

In this configuration, in the remote management system, the server storage means of the server device stores pseudo-random seed data, and the server control means generates pseudo-random numbers from the seed data and designates data to be received from the pseudo-random number sequence. The device control unit of the network connection device including a storage unit that generates a request, notifies the start position and the sequence length in the pseudo random number sequence as a request, and stores the same data as the pseudo random number seed data stored in the server storage unit. A pseudorandom number is generated from the seed data in the device storage unit, and the request is identified based on the pseudorandom number and the notification information from the server control unit. Therefore, even if the mail is intercepted, it is possible to keep the request name and the contents of the request unknown.

(8) The network-connected device includes device storage means for storing pseudo-random seed data, and the server storage means stores the same pseudo-random seed data as the device storage means. Means for generating a pseudo-random number from the seed data, generating a request for remotely controlling a network-connected device from the pseudo-random number sequence,
Notifying the start position and the sequence length in the pseudo-random number sequence as the request, the device control unit generates a pseudo-random number from the seed data of the device storage unit, and based on the pseudo-random number and the notification information from the server control unit. An operation corresponding to the request is performed.

In this configuration, in the remote management system, the server storage means of the server device stores the pseudo random number seed data, the server device control means generates the pseudo random number from the seed data, and the network connection device from the pseudo random number sequence. Generates a request for remote control of, and notifies the start position and sequence length in the pseudo-random number sequence as a request,
The device control unit of the network-connected device including the device storage unit that stores the same pseudorandom seed data as the server storage unit, generates a pseudorandom number from the seed data in the device storage unit,
An operation corresponding to the request is executed based on the pseudo-random number sequence and the notification information from the server control means. Therefore,
Even if the e-mail notifying the request is intercepted, it is possible to remotely control the network connection device from the server device so that the contents of the request are not known.

(9) The server control means changes the timing of generating a directory, and determines the timing by using a pseudo random number.

With this configuration, in the remote management system, the server control means of the server device changes the timing of generating a directory and determines this timing using a pseudo random number. Therefore, since the generation timing of the directory for receiving data is different each time, it is possible to make it more difficult to illegally access or manipulate the received data from the outside.

(10) The server control means deletes the created directory if no data has been received within a predetermined time after the directory was created.

With this configuration, in the remote management system, the server control means of the server device deletes the directory if no data is received even after a predetermined time has elapsed after the directory is created. Therefore, if data cannot be stored in the directory for some reason, the directory is deleted, so that it is possible to prevent spoofing of the received data, and it is possible to prevent unnecessary increase of data in the server storage means. Becomes

(11) The server device is connected to the Internet via a LAN, and the LAN is connected to a data server device connected to a firewall for preventing unauthorized access from outside the LAN via the Internet. The server control means transfers the data received by the HTTP communication means and stored in the server storage means to the data server device by the HTTP communication means, and erases the transferred data from the server storage means. It is characterized by doing.

In this configuration, in the remote management system, the server device is connected to the Internet via the LAN, and the LAN is connected to the data server device via the Internet to a firewall that prevents unauthorized access from outside the LAN. The server control means of the server device transfers the data received by the HTTP communication means and stored in the server storage means to the data server device by the HTTP communication means, and transfers the transferred data from the server storage means. to erase. Therefore, even if the server device is illegally accessed from the outside, it is possible to prevent access to data transmitted from the network connection device.

(12) The data server device includes: a data storage unit for storing identification information of the directory;
A data communication unit for exchanging information with a network connection device via a network, and a data control unit for controlling each unit. The data control unit instructs the server control unit to create a directory in a server storage unit. It is characterized by the following.

In this configuration, in the remote management system, the data server device includes a data storage unit that stores directory identification information, a data communication unit that exchanges information with a network connection device via a LAN, and controls each unit. The data control unit of the data server device instructs the server control unit of the server device to specify a directory to be created in the server storage unit.
Therefore, since information for generating a directory for receiving data is instructed from a data server device that cannot be accessed from the outside by the firewall, it is possible to prevent leakage of directory name information due to unauthorized access.

[0032]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The data transfer system of the present invention
The first device and the second device are configured to be connected via a network including the Internet. The first device communicates with the second device by using HTTP.
This is a configuration including communication means and mail receiving means for transmitting a data transmission request mail to the second device. The second device may include a mail receiving unit that receives a data transmission request mail transmitted from the first device, and an HTTP that transmits predetermined data or data requested to be transmitted to the first device using HTTP. And a transmission unit.

When requesting data transmission from the first device to the second device, mail is used. When data is transmitted from the second device to the first device, HTTP is used. As a result, data can be transmitted more reliably than when data is transmitted using mail.

Hereinafter, a remote management system will be described as an embodiment of the data transfer system. FIG. 1 is a block diagram showing a schematic configuration of a remote management system according to an embodiment of the present invention. The remote management system 1 has a configuration in which an installation site 2 and a management company 3 are connected via the Internet 4.

The installation site 2 includes a network connection device 11, a network management server 12, and a mail server 1.
3 and the firewall 14 are LA in the installation site 2
The components are connected to each other by N15. The network connection device 11 corresponds to a second device in the data transfer system.

The network connection device 11 includes a display unit 21, an input unit 22, and an HTTP transmission means HTTP.
HTTP transmission unit 23 with client function, mail reception unit 2 with mail software as mail reception means
4. It is composed of a control unit 25 as device control means and a storage unit 26 as device storage means.

In the management company 3, an HTTP server 31, a firewall 32, a data server 33, and a mail server 34 which are server devices are connected via a LAN 35. The data server 33 is connected to the LAN 3
6 is connected to the firewall 32. H
The TTP server 31 corresponds to a first device in the data transfer system.

The HTTP server 31 includes a mail transmission unit 41 provided with mail software serving as a mail transmission unit, and an HTTP server.
The communication system includes an HTTP communication unit 42 having WWW management software as a communication unit, a storage unit 43 as a server storage unit, and a control unit 44 as a server control unit.

The data server 33 includes a storage section 51 as data storage means, a communication section 52 having mail software as data communication means, and a control section 53 as data control means.

Each unit in the network connection device 11 is controlled by the control unit 25. The HTTP transmission unit 23 and the mail reception unit 24 are connected to the LAN 15. The display unit 21 is for displaying various information to the user. The input unit 22 is for the user to input data and the like. HTTP transmission unit 23
Is for transmitting data to the HTTP server 31 using HTTP.

The mail receiving unit 24 includes an HTTP server 31
This is for receiving mail sent from. The control unit 25 controls each unit of the network connection device 11. The storage unit 26 is for storing various data.

In the HTTP server 31, each unit is connected to the control unit 44. The mail transmitting unit 41 and the HTTP communication unit 42 are connected to the LAN 35.

The mail transmission section 41 is for transmitting a data transmission request mail to the network connection device 11. The HTTP communication unit 42 is for receiving data transmitted from the network connection device 11 using HTTP. Further, it is for transmitting the received data to the data server 33.

The storage section 43 is for storing various data. The control unit 44 controls each unit of the HTTP server 31.

In the data server 33, each unit is connected to the control unit 53. Further, the data communication unit 52
It is connected to AN36.

The storage unit 51 of the data server 33 stores various data and data transferred from the HTTP server 31. The data communication unit 52 is an HTTP
It receives data transmitted from the server 31,
This is for giving various instructions to the P server 31. The control unit 53 controls each unit of the data server 33.

In the remote management system 1, when requesting the network connection device 11 to transmit data, the HTTP server 31 makes a request using an e-mail. Then, the network connection device 11 communicates with the HTTP server 3
1 is transmitted using HTTP. HT
When sending a data transmission request mail to the network connection device 11, the TP server 31 creates a directory for receiving data in the storage unit 43. And the control unit 25
Transmits the mail including the directory information to the network connection device 11 by the mail transmitting unit 41.

Control unit 25 of network connection device 11
When the mail is received by the mail receiving unit 24, the content is confirmed. Then, based on the received directory information, predetermined data is stored in the storage unit 43 of the HTTP server 31.
To the generated directory.

The HTTP server 31 generates a request for designating data to be received when sending an e-mail,
It is also possible to send by e-mail. Further, it is also possible to generate a request for controlling the network connection device from a remote place, and transmit the request as mail.

FIG. 2 is a table showing a random number sequence generated by the HTTP server and the network connection device, a table provided in the HTTP server and the network connection device, and a table showing directory generation timing.

In the network connection device 11, the HTTP
The table as shown in FIG. 2B in which the name of the directory where the server 31 receives the data and the identification information (key number) are stored in the storage unit 43 and the storage unit 26, respectively.
Have. Further, the HTTP server 31 generates a pseudo-random number as shown in FIG. 2A to determine a key number to be used as identification information of the directory, and determines the key number by using the pseudo-random number. And the HTTP server 3
1 transmits the pseudorandom number as directory identification information when transmitting a mail to the network connection device 11. Network connection device 1 that received the mail
1 refers to the table stored in the storage unit 26 to determine the directory to which data is transmitted. And HTT
The P transmission unit 23 transmits the requested data or predetermined data.

The HTTP server 31 stores a table for managing the timing and the directory creation time as shown in FIG. 2C between the HTTP server 31 and the network connection device 11 in order to prevent unauthorized access to data. To have it on both sides. Then, the HTTP server 31
The directory generation timing is changed using the pseudo-random number, and data on the directory generation timing is also transmitted by e-mail. Accordingly, the directory generation timing is changed every time, so that unauthorized access to data can be prevented.

When the data transmission request mail is transmitted from the HTTP server 31 and the data is not received within a predetermined time, the generated directory is deleted. .

Further, the HTTP server 31 sends H to the network connection device 11 according to the mail to be transmitted.
The data transmitted using TTP is temporarily stored in the storage unit 43 of the server device. Then, when the data reception is completed, the control unit 44 transfers the data to the data server 33. Further, the data stored in the storage unit 43 is deleted. The control unit 53 of the data server 33 stores the data transmitted from the HTTP server 31 in the storage unit 51.
The HTTP server 31 sends the LA
Since it is not connected to N35, it is possible to gain unauthorized access from outside via the Internet. However, since the data sent from the network connection device 11 is stored in the data server 33, the data can be prevented from being illegally accessed from outside.

Another embodiment of the remote management system according to the present invention will be described. The same pseudorandom seed data is stored in the respective storage units of the HTTP server 31 and the network connection device 11. Then, both sides generate a pseudo-random number using this kind of data, and send a mail including a request for designating data to be received from the HTTP server 31 to the network connection device 11 and a request for remotely controlling the network connection device 11. At this time, we use pseudo-random numbers as the name or request of this request,
The start position and the sequence length in the pseudo random number sequence are notified by e-mail. The network connection device 11
Since pseudorandom numbers are generated from the same seed data as described above, the content of the request can be easily grasped,
Even if the data is accessed from outside, it is possible to instruct the network connection device 11 without understanding the contents.

Another embodiment of the remote management system according to the present invention will be described. If the request and the contents of the directory to be included in the e-mail to be transmitted from the HTTP server 31 to the network connection device 11 are stored in the storage unit 43 of the HTTP server 31, as described above, unauthorized access from the outside via the Internet may be performed. It is possible to access. As a measure against this, the storage unit 4 of the HTTP server 31
3, the storage unit 5 of the data server 33
1 stores the request and the contents of the directory to be included in the mail transmitted from the HTTP server 31. Then, at a predetermined timing, the control unit 53 of the data server 33 instructs a request required by the HTTP server 31 or the contents of a directory. The control unit 44 of the HTTP server 31 writes the request and the contents of the directory instructed by the data server 33 in the mail, and causes the mail transmitting unit 41 to transmit the mail. The network connection device 11 performs a predetermined data transmission and a predetermined operation according to the contents of the mail.

Therefore, since the data server 33 is connected to the Internet and the LAN via the firewall 32, the information on the directory and the request to be generated is not illegally accessed from the outside.

Next, the processing procedure of the remote management system according to the present invention will be described with reference to flowcharts. Figures 3 and 4
5 is a flowchart for explaining a processing procedure of the remote management system. FIG. 3A is a flowchart for explaining a mail transmission procedure of the HTTP server 31.
FIG. 3B is a flowchart for explaining a procedure of data transmission of the network connection device 11. FIG.
9 is a flowchart for explaining a process for managing a directory of the HTTP server 31.

As shown in FIG. 3A, the control unit 44 of the HTTP server 31 generates a key number using a pseudo random number (step 101). Then, the control unit 44 generates a directory name and a timing from the key number and the transmission destination (Step 102). Next, the control unit 44 checks the generated directory name for duplication (step 10).
3). If there is a duplicate directory name (Step 1
04) In order to generate a directory name again, the process of step 101 is performed.

On the other hand, if there is no duplication of the directory name (step 104), the directory name and the generation time are stored in the storage unit 43 (step 105). Then, the control unit 44 sends the mail to the network connection device 1
A mail is transmitted to 1 (step 106).

As shown in FIG. 3B, the network connection device 11 waits until a mail is transmitted from the HTTP server 31 (step 111). When the mail is received, the directory described in the mail is received. The control unit 25 stores the name and the generation time in the storage unit 26 (Step 112). Then, the control unit 25 waits until the time when the directory is created (step 11).
3) At the time when the directory is created, HTT
The predetermined data or the data requested by mail is transmitted to the P server 31 (step 114).

As shown in FIG. 4, the HTTP server 31
The control unit 44 determines whether it is time to generate a directory (step 121). At the generation timing, a directory is generated in the storage unit 43 (step 131), the directory deletion time is stored (step 132), and the process returns to step 121.

On the other hand, if it is not the generation timing in step 121, it is determined whether or not data has been received from the network connection device 11 (step 122). When the data is received, the data is temporarily stored in the storage unit 43 (Step 141), and the control unit 44 transfers the received data to the data server 33 by the HTTP communication unit 42 (Step 142). When the data transfer is completed, the control unit 44 deletes the data stored in the storage unit 43 (Step 143), and further deletes the directory in which the data is stored (Step 144). And step 12
It returns to the process of 1.

On the other hand, if the data is not received from the network connection device 11 in step 122,
It is determined whether it is the time of the directory deletion time (step 123). Transfer data to network connection device 1
If the deletion time arrives without receiving the data from No. 1, the control unit 44 deletes the directory created in the storage unit 43 (Step 151), and performs error processing since no data has been received (Step 152). And step 12
Return to 1.

On the other hand, if the directory deletion time has not come in step 123, the process of step 121 is performed again.

[0066]

According to the present invention, the following effects can be obtained.

(1) The data transfer system comprises HTTP communication means for performing communication using HTTP, and at least a second
A first device including a mail transmission unit that transmits a data transmission request mail to the first device, a mail reception unit that receives the data transmission request mail, and at least the first device transmits predetermined data or the requested data to the first device. And a second device provided with an HTTP transmission means for transmitting using HTTP, and these are connected via the Internet, so that the first device can transmit data to the second device by mail. Make a transfer request, and the second device sends an HT to the first device.
Data can be transmitted using TP,
Data can be sent more reliably than sending data by e-mail.

(2) The remote management system comprises HTTP communication means for communicating with the network connection equipment using HTTP, mail transmission means for transmitting a data transmission request mail to the network connection equipment, and server control means for controlling each means. , A mail receiving unit for receiving a data transmission request mail, an HTTP transmission unit for transmitting predetermined data or requested data to the server device using HTTP, and a device control unit for controlling each unit Are connected via the Internet, the server device requests the network device to transfer data using e-mail, and the network device requests the server device to perform HTTP transfer. Since data is transmitted using, network connection from the server Data transfer can be started to the device, and the data can be reliably transferred to the server device.

(3) In the remote management system, the server control means of the server device having the server storage means for storing data generates a directory for receiving data from the network connection device in the server storage means, and identifies the generated directory. The information is transmitted to the network connection device by the mail transmission unit, and the device control unit of the network connection device transmits the data by the HTTP transmission unit to the directory generated in the server storage unit corresponding to the identification information received by the mail reception unit. By doing so, the server device creates a directory for data reception when receiving data, so the directory for receiving data is not fixed, and illegally accesses or manipulates received data from outside. Can be prevented.

(4) In the remote management system, the server control means of the server device generates a request for designating data received from the network connection device, transmits the generated request to the network connection device by the mail transmission unit, and The device control means of the device transmits information corresponding to the request received by the mail
Since the transmission is performed by the P transmission unit, the server device can receive only the data specified by the request from the network connection device.

(5) In the remote management system, the server control means of the server device generates a request for remotely controlling the network connection device, transmits the generated request to the network connection device by the mail transmission unit,
Since the device control means of the network connection device performs an operation corresponding to the request received by the mail receiving unit, the server device can remotely control the network connection device using the request.

(6) In the remote management system, the server device and the network connection device each have a table in which the name of a directory for receiving data by the server device and identification information are associated with each other. Since a pseudo-random number is generated and the identification number using the pseudo-random number is used as directory identification information, even if an e-mail is illegally intercepted, the name of the directory to which data is transferred is not known. it can.

(7) In the remote management system, the server storage means of the server device stores seed data for pseudo-random numbers, and the server control means generates pseudo-random numbers from the seed data and designates data to be received from the pseudo-random number sequence. The device control means of the network connection device having a storage means for notifying the start position and the sequence length in the pseudo random number sequence as a request and storing the same data as the pseudo random number seed data stored in the server storage means, A pseudorandom number is generated from the seed data in the device storage unit, and the request is identified based on the pseudorandom number and the notification information from the server control unit. Therefore, even if the mail is intercepted, the request name and the contents of the request are not known. Can be

(8) In the remote management system, the server storage means of the server device stores pseudo-random seed data, the server equipment control means generates pseudo-random numbers from the seed data, and determines the network connection equipment from the pseudo-random number sequence. A request for remote control is generated, a start position and a sequence length in a pseudo random number sequence are notified as a request, and device control of a network connection device including device storage means for storing the same pseudo random number seed data as a server storage means The means generates a pseudo-random number from the seed data in the device storage means, and executes an operation corresponding to the request based on the pseudo-random number sequence and the notification information from the server control means. It is possible to remotely control the network connection device from the server device without knowing the contents of the request. Wear.

(9) In the remote management system, the server control means of the server device changes the directory generation timing and determines this timing using a pseudo-random number, so that the directory generation timing for receiving data is changed each time. Due to the difference, it is possible to make it more difficult to illegally access or manipulate the received data from outside.

(10) In the remote management system, the server control means of the server device deletes the directory if it does not receive data within a predetermined time after the generation of the directory. Therefore, data cannot be stored in the directory for some reason. In this case, since the directory is deleted, spoofing of the received data can be prevented, and unnecessary increase of data in the server storage unit can be prevented.

(11) In the remote management system, the server device is connected to the Internet via a LAN.
The AN is connected to a data server device connected to a firewall for preventing unauthorized access from outside the LAN via the Internet, and the server control means of the server device receives the data by the HTTP communication means and stores it in the server storage means. The transferred data is transferred to the data server device by the HTTP communication means, and the transferred data is deleted from the server storage means. Therefore, even if the server device is illegally accessed from the outside, the data transmitted from the network connection device can be deleted. Access can be prevented.

(12) In the remote management system, the data server device controls data storage means for storing directory identification information, data communication means for exchanging information with a network connection device via a LAN, and each means. Data control means, and the data control means of the data server device instructs the server control means of the server device to specify a directory to be created in the server storage means. Information for generating a directory to be received is specified, and leakage of directory name information due to unauthorized access can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a remote management system according to an embodiment of the present invention.

FIG. 2 is a table showing a random number sequence generated by an HTTP server and a network connection device, a table provided in the HTTP server and the network connection device, and a table showing a directory generation timing.

FIG. 3 is a flowchart for explaining a processing procedure of the remote management system.

FIG. 4 is a flowchart for explaining a processing procedure of the remote management system.

[Explanation of symbols]

 Reference Signs List 1-Remote management system 11-Network connection device 24-Mail receiving unit 25-Control unit 31-HTTP server 33-Data server 41-Mail transmitting unit 43-Storage unit

Claims (12)

[Claims] 1. A data transfer system including a first device and a second device connected via a network including the Internet, wherein the first device is at least connected to the second device by an HTT.
HTTP communication means for performing communication using P, and mail transmission means for transmitting at least the data transmission request mail to the second device, wherein the second device receives the data transmission request mail A data transfer system comprising: receiving means; and HTTP transmitting means for transmitting predetermined data or data requested to be transmitted to at least the first device using HTTP. 2. A remote management system including a server device and a network connection device connected via a network including the Internet, wherein the server device communicates with at least the network connection device using HTTP. Means,
Mail transmission means for transmitting a data transmission request mail to at least the network connection device, and server control means for controlling each of the means, the network connection device, a mail receiving means for receiving the data transmission request mail The predetermined data or the data requested to be transmitted to at least the server
A remote management system comprising: HTTP transmission means for transmitting using a TP; and device control means for controlling each of the above means. 3. The server device includes server storage means for storing data, the server control means generates a directory for receiving data from the network connection device in the server storage means, and stores identification information of the generated directory in the server storage means. A mail transmission unit transmits the data to the network-connected device, and the device control unit transmits the data by the HTTP transmission unit to a directory generated in the server storage unit corresponding to the identification information received by the mail reception unit. 3. The remote management system according to claim 2, wherein: 4. The server control means generates a request for specifying data received from the network connection device, transmits the generated request to the network connection device by the mail transmission unit, and the device control unit 3. The remote management system according to claim 2, wherein information corresponding to the request received by the mail receiving unit is transmitted by the HTTP transmitting unit. 5. The server control unit generates a request for remotely controlling the network connection device, transmits the generated request to the network connection device by the mail transmission unit, and the device control unit 3. The remote management system according to claim 2, wherein an operation corresponding to the request received by the mail receiving unit is performed. 6. The server device and the network connection device each include a table in which a name of a directory in which the server device receives data is associated with identification information, and the server control unit generates a pseudo random number. 4. The remote management system according to claim 3, wherein an identification number using a pseudo-random number is used as directory identification information. 7. The network connection device includes device storage means for storing pseudo-random seed data, the server storage means storing the same pseudo-random seed data as the device storage means, and the server control means. Generates a pseudo-random number from the seed data, generates a request specifying data to be received from the pseudo-random number sequence, notifies the start position and the sequence length in the pseudo-random number sequence as the request, 5. The remote management system according to claim 4, wherein a pseudo-random number is generated from the seed data in the storage unit, and the request is identified based on the pseudo-random number and notification information from the server control unit. 8. The network connection device includes device storage means for storing pseudo-random seed data; the server storage means stores the same pseudo-random seed data as the device storage means; Generates a pseudo-random number from the seed data, generates a request for remotely controlling a network-connected device from the pseudo-random number sequence, notifies the start position and sequence length in the pseudo-random number sequence as the request, The apparatus according to claim 5, wherein the means generates a pseudo-random number from the seed data of the device storage means, and executes an operation corresponding to the request based on the pseudo-random number and notification information from the server control means. The remote management system as described. 9. The remote management system according to claim 6, wherein the server control means changes a timing of generating a directory and determines the timing by using a pseudo random number. 10. The remote management system according to claim 3, wherein the server control means deletes the generated directory if no data is received within a predetermined time after the directory is generated. . 11. The server device is connected to the Internet via a LAN, and the LAN is connected to a data server device connected to a firewall for preventing unauthorized access from outside the LAN via the Internet, The server control means transmits the data received by the HTTP communication means and stored in the server storage means to the HTTP
4. The remote management system according to claim 3, wherein the data is transferred to the data server device by TP communication means, and the transferred data is deleted from the server storage means. 12. The data server device, comprising: a data storage unit for storing identification information of the directory;
A data communication unit for exchanging information with a network connection device via a network, and a data control unit for controlling each unit. The data control unit instructs the server control unit with a directory to be created in a server storage unit. The remote management system according to claim 11, wherein: