JP2009230693A - Client terminal, network complex machine, and network printing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a network printing system that allows a variety of settings and functions that a network complex machine has to be operated past a firewall via the Internet and that can receive IPP responses in real time. <P>SOLUTION: The network printing system 1 includes: a client terminal 3 which encodes an IPP operation request as the message body of an HTTP, the request including an operation ID set in the bender expansion area of an IPP, and which sends the request to the network complex machine 2 while designating a TCP 80th port; and a network complex machine 2 which receives the IPP operation request sent from the client terminal 3 through the TCP 80th port and executes the IPP operation request based on the operation ID included in the IPP operation request. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a client terminal, a network multifunction peripheral, and a network printing system including these client terminals and a network multifunction peripheral.

  In recent years, with the development of network communication technology and the spread of the network environment, in addition to a network printer capable of printing via a network and a network printer function, a network multifunction device having a network scanner function, a network facsimile function, and the like ( MFP (Multi Functional Peripheral) is widely used. Further, IPP (Internet Printing Protocol) is used as a technique for realizing printing via the Internet for network printers and network multifunction peripherals.

  Here, the IPP defines a communication procedure (protocol) for remotely printing on a network printer. IPP uses HTTP (Hypertext Transfer Protocol) as a transport protocol for the data packet. The IPP defines various operations for printing and various attributes for finely controlling a job, and encodes these various attributes as an HTTP Message Body. Since HTTP is mapped onto TCP / IP, if IPP is used, connection-type communication is guaranteed. In the IPP operation, Print-Job (print execution), Get-Printer-Attributes (printer attribute acquisition), Get-Jobs (job list acquisition), Cancel-Job (cancel), Get-Job-Attributes (job status acquisition), etc. A procedure and various attributes for controlling from the start to the end of printing are defined.

  On the other hand, a firewall is often provided between the intranet and the Internet for security protection against network crimes accompanying the development of the Internet. Here, in IPP, communication is normally performed using the TCP 631 port, but there are few cases in which a general firewall is set to pass the TCP 631 port.

In order to solve such a problem, Patent Document 1 discloses a network printer system that processes generated print data based on IPP and transfers it by electronic mail. In this network printer system, network printing beyond a firewall is realized by using electronic mail as an IPP transfer means. That is, according to this network printer system, an IPP request is transmitted to an IPP server connected to the network printer using SMTP (Simple Mail Transfer Protocol). The IPP request mail that reaches the IPP server is expanded, and the IPP request header is extracted from the body data. The IPP server refers to the operation ID of this request and executes processing.
JP 2007-94534 A

  According to the network printer system described in Patent Document 1, network printing can be performed across a firewall. However, in the network printer system described in Patent Document 1, various settings such as user registration, update, and deletion are performed beyond the firewall, and functions other than the print function, for example, scanned image data are set in advance. Execution of functions such as scan-to-print output to another printer or scan-to-folder that directly stores scanned image data in a specific folder such as a shared folder is not considered. In HTTP, a request-response connection and data transfer are performed to the server, whereas in SMTP, the connection is immediately disconnected after data is transferred to a preset SMTP server. End up. For this reason, the client side cannot immediately know information such as when the data according to SMTP was transferred to the target SMTP server or when it was surely received when issuing the request.

  The present invention has been made to solve the above-mentioned problems, and can operate various settings / functions provided in the network multifunction peripheral via the Internet, beyond the firewall, and in real time. It is an object of the present invention to provide a client terminal capable of receiving a response, a network multifunction peripheral, and a network printing system including these client terminals and a network multifunction peripheral.

  A client terminal according to the present invention is a client terminal connected to a network multifunction peripheral arranged via the Internet, and sends an IPP operation request including an operation ID set in the IPP vendor extension area to an HTTP message body. And a transmission means for specifying and transmitting a predetermined TCP port to the network multifunction peripheral.

  According to the client terminal of the present invention, the IPP operation request is encoded as an HTTP message body, and is transmitted to the network multifunction device by designating a predetermined TCP port. Therefore, for example, even if the client terminal is separated from the network multifunction peripheral by a firewall, an operation set in the IPP vendor extension area by using a TCP port that can pass through the firewall as a predetermined TCP port. An IPP operation request including the ID can be sent to the network multifunction device through the firewall. Therefore, by operating various settings / functions provided in the network multifunction device beyond the firewall by defining various settings / functions provided in the network multifunction device in the operation ID set in the IPP vendor extension area. Can do. Further, since HTTP is used as a transport protocol, an IPP response can be received in real time. As a result, it is possible to operate various settings / functions provided in the network multi-function peripheral via the Internet, beyond the firewall, and to receive an IPP response in real time.

  The network multifunction device is preferably connected to the Internet via a firewall, and the transmission means preferably designates a TCP port 80 as a predetermined TCP port.

  According to the client terminal according to the present invention, since the TCP port 80 is designated as the predetermined TCP port, it is possible to send an IPP operation request to the network MFP through the firewall.

  A network multifunction peripheral according to the present invention is a network multifunction peripheral connected to any one of the above client terminals via the Internet, and an IPP operation request encoded as an HTTP message body transmitted from the client terminal. Receiving means for receiving through a designated TCP port; and operating means for executing an IPP operation request based on an operation ID included in the IPP operation request received by the receiving means.

  According to the network MFP according to the present invention, the IPP operation request is executed based on the operation ID included in the IPP operation request received through the designated TCP port. Therefore, by defining various settings / functions provided in the network MFP in the operation ID set in the IPP vendor extension area, for example, a network in which the client terminal and the network MFP are separated by a firewall. Even in an environment, it is possible to execute various settings / functions provided in the network MFP beyond the firewall. Further, according to the network multifunction peripheral according to the present invention, since HTTP is used as a transport protocol, an IPP response can be returned in real time.

  A network printing system according to the present invention includes any one of the above client terminals and the network multifunction peripheral.

  According to the network printing system of the present invention, since any one of the client terminals and the network multifunction peripheral is provided, as described above, for example, the client terminal is separated from the network multifunction peripheral by a firewall. Even so, it is possible to operate various settings / functions provided in the network multifunction peripheral beyond the firewall, and to deliver an IPP response in real time.

  In the network printing system according to the present invention, it is preferable that the IPP operation request including the operation ID set in the IPP vendor extension area requests registration, update, and / or deletion of a user.

  In this case, it is possible to register, update, and / or delete a user via the Internet and beyond the firewall.

  In the network printing system according to the present invention, it is preferable that the IPP operation request including the operation ID set in the IPP vendor extension area requests a scan to print or scan to folder.

  In this case, the scan-to-print function or the scan-to-folder function can be executed via the Internet and beyond the firewall.

  In the network printing system according to the present invention, the client terminal includes an encryption unit that encrypts the transmitted IPP operation request, and the network MFP includes a decryption unit that decrypts the encrypted IPP operation request. Is preferred.

  In this way, it is possible to ensure security when transmitting an IPP operation request encoded as an HTTP message body.

  According to the present invention, the IPP operation request including the operation ID set in the IPP vendor extension area is encoded as an HTTP message body, and a predetermined TCP port is designated and transmitted to the network MFP. Through the Internet, it is possible to operate various settings / functions provided in the network multifunction peripheral over a firewall and receive an IPP response in real time.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the same element and the overlapping description is abbreviate | omitted.

  First, the overall configuration of the network printing system 1 according to the embodiment, and the configurations of the network multifunction peripheral 2 and the client terminal 3 constituting the network printing system 1 will be described with reference to FIGS. FIG. 1 is a diagram showing an overall configuration of a network printing system 1. FIG. 2 is a block diagram showing the configuration of the network multifunction peripheral 2 and the client terminal 3 constituting the network printing system 1.

  A network printing system 1 shown in FIG. 1 includes a client terminal 3 connected to the Internet 5 via a first firewall 8 and a network connected to the client terminal 3 via the Internet 5 and a second firewall 9. The multi-function device 2 is provided. In the network printing system 1, for example, user registration, update, deletion, etc., in addition to print processing, from the client terminal 3 to the network multifunction peripheral 2 disposed across the second firewall 9 via the Internet 5. Various setting processes, a scan-to-print process, a scan-to-folder process, and the like can be executed. Although FIG. 1 shows an example in which one network multifunction device 2 and one client terminal 3 are connected to the Internet 5, there are a plurality of network multifunction devices and client terminals connected to the Internet 5. Also good.

  The client terminal 3 is a personal computer used by a user, and is connected to the Internet 5 via the first firewall 8 as described above. The client terminal 3 is installed with an IPP-compatible printer driver and can execute various IPP operations. The client terminal 3 has an HTTP Sender module, and an IPP operation executed in the client terminal 3 is encoded as an HTTP message body and sent to the network MFP 2 as an IPP operation request (hereinafter also simply referred to as an “IPP request”). Sent. Further, the client terminal 3 includes an operation ID (hereinafter also referred to as “operation-id”) set in the IPP vendor extension area (operation-id = 0x4000-0x8FFF), and performs various settings / functions of the network MFP 2. Send an IPP request to operate. Here, the IPP request is transmitted to the network MFP 2 through the HTTP service port (TCP port 80) of the first firewall 8 and the second firewall 9. For this purpose, the client terminal 3 includes a transmission unit 30. The transmission unit 30 corresponds to transmission means described in the claims.

  The client terminal 3 also includes an encryption unit 31 that performs encryption according to, for example, SSL (Secure Sockets Layer) when an IPP request is encoded and transmitted as an HTTP message body. The encryption unit 31 functions as encryption means described in the claims.

  The network MFP 2 has a scanner function, a copy function, a facsimile function, an IFAX (Internet facsimile function), and a server function in addition to a printer function corresponding to the network. In order to realize each of these functions, the network MFP 2 includes a control unit 11, a server 12, a decryption unit 13, an operation unit 15, a display unit 16, a reading unit 17, a recording unit 18, a codec 19, an image storage unit 20, A modem 21, an NCU 22, an IFAX control unit 23, a LAN interface 24, and the like are provided. In addition, each part is connected by the communication line 25 so that communication is possible mutually.

  The control unit 11 includes a microprocessor that performs calculations, a ROM that stores a program for causing the microprocessor to execute each process, a RAM that temporarily stores various data such as calculation results, and a backup in which the data is backed up. It is comprised by RAM etc. The control unit 11 executes the program stored in the ROM, thereby realizing the functions of each unit constituting the network multifunction device 2 described below and integrating the hardware constituting the network multifunction device 2 in an integrated manner. Control.

  The server 12 has an HTTP / IPP server function, and receives an IPP request encoded as an HTTP message body transmitted from the client terminal 3 through a TCP port 80. In addition, the server 12 analyzes the received IPP request and executes the IPP request based on the analysis result. More specifically, the server 12 extracts an IPP request header from the received IPP request, and executes processing with reference to the operation-id of the IPP request header. That is, the server 12 can request the operation of the network multifunction device 2 from the client terminal 3. The server 12 functions as a reception unit and an operation unit described in the claims. Further, the server 12 returns the result of the IPP operation by the IPP request to the client terminal 3 as an IPP response.

  The decryption unit 13 decrypts the encrypted IPP request. The decoding unit 13 functions as a decoding unit described in the claims.

  In addition, the operation unit 15 includes a plurality of keys used for operating the network multifunction peripheral 1, such as a numeric keypad, an abbreviated key, a start key, a stop key, and various function keys. The display unit 16 is a display device using an LCD or the like, and displays the operation state of the network multifunction peripheral 2 and / or various setting contents. The reading unit 17 reads an original with a CCD or the like and generates image data. The recording unit 18 is an electrophotographic printer, and prints out image data generated by the reading unit 17 and image data received by FAX on paper.

  The codec 19 encodes and compresses the image data generated by the reading unit 17 and decodes the encoded and compressed image data. The image storage unit 20 is configured by a DRAM or the like, and stores image data encoded and compressed by the codec 19, image data received by FAX, and the like. A modem (modem / demodulator) 21 performs modulation / demodulation between a digital signal and an analog signal. An NCU (Network Control Unit) 22 is connected to the modem 21 and controls the connection between the modem 21 and the PSTN (Public Switched Telephone Network) 7.

  The IFAX control unit 23 uses the Internet environment, and transmits the transmission original as image data in TIFF / PDF format attached to the mail. The IFAX control unit 23 receives a mail from the POP server every set time and automatically prints out the mail. The LAN interface 24 is an interface through which the network MFP 2 is communicably connected to the LAN 6. The LAN 6 is connected to the Internet 5 through a firewall 9.

  Next, the operation of the network printing system 1 (the network multifunction device 2 and the client terminal 3) will be described with reference to FIG. Here, a case where user registration, update, and deletion are performed using IPP will be described as an example. FIG. 3 is a sequence diagram showing a processing procedure of user registration, update, and deletion processing by the network printing system 1 (network multifunction device 2 and client terminal 3).

  First, the client terminal 3 acquires the attributes of the network multifunction device 2 in order to check whether the network multifunction device 2 is compatible with user registration, update, and deletion. Therefore, the client terminal 3 transmits a Get-Printer-Attributes (printer attribute acquisition) request to the network MFP 2 using HTTP as the transport protocol and specifying the 80th port (step S100). Here, FIG. 4 shows a data example of a request message for Get-Printer-Attributes (printer attribute acquisition). As this IPP request, one specified in the IPP standard specification can be used. That is, as shown in FIG. 4, 0x000B, which is supported as a standard, is set in operation-id 200. In addition, when transmitting and receiving an IPP request and an IPP response using HTTP, it is preferable to secure security by using SSL.

  The network MFP 2 that has received the IPP request decodes the IPP request and executes printer attribute response processing (S101). Then, the network MFP 2 returns the various attributes of the network MFP 2 as IPP attributes to the client terminal 3 (Step S102). Here, FIG. 5 shows a data example of a response message of Get-Printer-Attributes (printer attribute acquisition). In the response message shown in FIG. 5, user operation check (0x4000), user registration (0x4001), user update (0x4002), and user deletion (0x4003) are returned as operations supported by the network MFP 2. (See value (attribute values) 210 to 213 in FIG. 5). In this embodiment, the IPP vendor extension area (0x4000-0x8FFF) is used, the operation-id for user operation check is set to 0x4000, user registration is set to 0x4001, user update is set to 0x4002, and user deletion is set to 0x4003. did.

  The client terminal 3 that has received the printer attribute response checks the printer attribute response and checks the operation supported by the network multifunction peripheral 2 (step S103). That is, here, it is checked whether or not the network MFP 2 supports user operation check, user registration, user update, and user deletion.

  If it is determined in step S103 that the network multifunction device 2 supports user operation check, user registration, user update, and user deletion, the client terminal 3 may perform user registration, update, and deletion. Check if you can. Therefore, the client terminal 3 transmits a Check-User-Operation (user operation check) request to the network MFP 2 using HTTP as the transport protocol and specifying the 80th port (step S104). Here, FIG. 6 shows a data example of a request message of Check-User-Operation (user operation check). As illustrated in FIG. 6, 0x4000 (user operation check) is set in operation-id 220. In addition, check-user-operation is set in name (attribute name) 221, and 0x4001 representing user registration to be checked is set in value (attribute value) 222. Note that 0x4002 is set to value (attribute value) when checking whether or not user update can be performed (not shown), and 0x4003 is set to value (attribute value) when checking whether or not user deletion can be performed. (Not shown).

  The network MFP 2 that has received the Check-User-Operation (user operation check) request decodes the IPP request and executes a user operation check process (S105). Then, the network multifunction device 2 returns the check result, that is, whether or not user registration, update, and deletion can be performed to the client terminal 3 (step S106). Here, FIG. 7 shows a data example of a response message of Check-User-Operation (user operation check). In the response message shown in FIG. 7, 0x0000 indicating that user registration is possible is set in the status-code 230. On the other hand, if the user cannot be registered, updated, or deleted due to reasons such as maintenance, an error response is returned. At the same time, items necessary for user registration, such as the user name, the maximum number of characters of the user name, the E-mail address, the maximum number of characters of the E-mail address, etc. are returned (name (attribute name) 231 in FIG. 6). , 233, value (attribute value) 232, 234). Similarly, if the user can be updated, the items necessary for the user update are returned, and if the user can be deleted, the items required for the user deletion are returned. Is done.

  Subsequently, in order to register the user, the client terminal 3 transmits an Add-User-Information (user registration) request to the network MFP 2 using HTTP as the transport protocol and specifying the 80th port ( Step S108). Here, FIG. 8 shows a data example of a request message of Add-User-Information (user registration). As shown in FIG. 8, 0x4001 (user registration) is set in the operation-id 240. In the attribute (attribute) 241, information on the user to be registered is set. A plurality of user registrations can be performed simultaneously. When registering a plurality of users, an attribute (attribute) is set for each registered user. Note that FIG. 8 shows attributes (attributes) of two users (see attribute 241 and attribute 242 in FIG. 8).

  Upon receiving the Add-User-Information (user registration) request, the network MFP 2 decodes the IPP request and executes user registration processing (S109). Then, the network multifunction device 2 returns the execution result to the client terminal 3 (step S110). Here, FIG. 9 shows a data example of a response message of Add-User-Information (user registration). In the response message shown in FIG. 9, Boolean values 0x01 (true) indicating that two user registrations have been successful are set in values (attribute values) 250 and 251. On the other hand, if registration fails, 0x00 (false) is set and returned.

  Next, in order to update the user, the client terminal 3 transmits an Update-User-Information (user update) request to the network MFP 2 using HTTP as a transport protocol and specifying the 80th port ( Step S112). Here, in the Update-User-Information (user update) request, 0x4002 (user update) is set in the operation-id. In addition, information of the user to be updated is set in attribute (attribute). A plurality of user updates can be performed simultaneously. When updating a plurality of users, an attribute (attribute) is set for each user to be updated.

  The network multifunction device 2 that has received the Update-User-Information (user update) request decodes the request and executes a user update process (S113). Then, the network multifunction device 2 returns the execution result to the client terminal 3 (step S114). More specifically, in an update-user-information (user update) response message, a Boolean value (0x00: fase / 0x01: true) indicating the update result is set to value (attribute value) and returned.

  Subsequently, in order to delete the user, the client terminal 3 transmits a Delete-User-Information (user deletion) request to the network MFP 2 using HTTP as the transport protocol and specifying the 80th port ( Step S116). Here, in the Delete-User-Information (user deletion) request, 0x4003 (user deletion) is set in the operation-id. Further, information of the user to be deleted is set in attribute (attribute). A plurality of users can be deleted at the same time. When deleting a plurality of users, an attribute (attribute) is set for each user to be deleted.

  The network MFP 2 that has received the Delete-User-Information (user deletion) request decodes the request and executes a user deletion process (S117). Then, the network multifunction device 2 returns the execution result to the client terminal 3 (step S118). More specifically, in the Delete-User-Information (user deletion) response message, a Boolean value (0x00: face / 0x01: true) indicating the deletion result is set to value (attribute value) and returned. As described above, user registration, update, and deletion are performed via the Internet 5 with respect to the network MFP 2 that has passed through the firewall 9.

  Further, the network printing system 1 uses the IPP vendor extension area and uses the 80th port, so that the scanned image data is sent to the network multifunction peripheral 2 arranged across the second firewall 9. It is also possible to execute a scan-to-print function for outputting to another preset printer and a scan-to-folder function for directly saving scanned image data in a shared folder or a specific folder in the server.

  A case where scan-to-print is executed using IPP will be described with reference to FIG. FIG. 10 is a sequence diagram showing a processing procedure of scan-to-print processing by the network printing system 1 (network multifunction device 2 and client terminal 3). The scan-to folder is the same as or similar to that in the case of scan-to-print except that the operation-id of IPP is different.

  The client terminal 3 transmits an IPP request for performing scan-to-print to the network multifunction device 2 using HTTP as a transport protocol, specifying the 80th port (step S300). Here, for example, 0x4004 is set in the operation-id 400 (see FIG. 11) of the IPP request. When executing the scan to folder, for example, 0x4005 is set as the operation-id 400 of the IPP request.

  Upon receiving the IPP request, the network MFP 2 decodes the IPP request and executes a scan-to-print process (step S301). Thereafter, the network MFP 2 returns an IPP response in which the execution result is set in the status-code 401 (see FIG. 11) to the client terminal 3 (step S302). As described above, scan-to-print can be executed for the network multifunction device 2 that has passed through the firewall 9.

  According to the client terminal 3 according to the present embodiment, the IPP request is encoded as an HTTP message body, and is transmitted to the network multifunction device 2 by specifying the TCP port 80. Therefore, the IPP request including the operation ID set in the IPP vendor extension area can reach the network MFP 2 through the second firewall 9. Therefore, by defining user registration, update, deletion, scan-to-print, or scan-to-folder in the operation ID set in the IPP vendor extension area, these settings / functions beyond the second firewall 9 Can be operated. Further, since HTTP is used as a transport protocol, an IPP response can be received in real time. As a result, it is possible to operate various settings / functions provided in the network MFP 2 via the Internet 5 and beyond the second firewall 9, and to receive an IPP response in real time.

  According to the network MFP 2 according to the present embodiment, the IPP request is executed based on the operation ID included in the IPP request received through the second port 9 through the TCP port 80. Therefore, by defining user registration, update, deletion, scan-to-print, or scan-to-folder in the operation ID set in the IPP vendor extension area, these settings / functions beyond the second firewall 9 Can be executed. Further, since HTTP is used as the transport protocol, an IPP response can be returned from the network multifunction device 2 in real time.

  According to the network printing system 1 according to the present embodiment, since the client terminal 3 and the network multifunction device 2 are provided, the first firewall 8 and the second firewall 9 are connected via the Internet 5 as described above. It is possible to use various settings / functions provided in the network MFP 2 such as user registration, update, deletion, scan-to-print, or scan-to-folder. In addition, the IPP response can be delivered in real time.

  According to the present embodiment, by encrypting / decrypting the HTTP header, the IPP request, and the IPP response using SSL, it is possible to ensure security when data is transmitted / received via the Internet 5.

  Also, according to the present embodiment, since the IPP vendor extension area is used, it is possible to add functions to a device that supports IPP relatively easily.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made. For example, in the above embodiment, a personal computer is used as the client terminal 3, but a network multifunction peripheral (MFP) may be used instead of the personal computer.

  In the above embodiment, when the IPP request is transmitted to the network MFP 2, the TCP port 80 is designated. However, the TCP port to be used is not limited to the port 80, and any TCP port can be used. .

  In the above-described embodiment, user registration, change, deletion, scan-to-print, and scan-to-folder are given as various settings / functions of the network MFP 2 operated using the IPP vendor extension area. Settings and functions that can be operated using the vendor extension area are not limited to these. For example, scan to FTP that sends scan data to an FTP server and saves it in a specified folder, scan to BOX that accumulates scan data in a BOX in the main unit hard disk, and scan that sends scanned documents and images as attachments by E-mail It can also be applied to toE-mail.

  In the above embodiment, the operation-id of the user operation check is 0x4000, the user registration is 0x4001, the user update is 0x4002, the user deletion is 0x4003, the scan to print function is 0x4004, and the scan to folder function is 0x4005. Although the operation-id of the addition operation is set in the IPP vendor extension area (0x4000-0x8FFF), these settings are not limited to the above embodiment.

  In the above embodiment, SSL is used as the security protocol, but TLS (Transport Layer Security) or the like may be used instead of SSL.

1 is a diagram illustrating an overall configuration of a network printing system according to an embodiment. 1 is a block diagram illustrating a configuration of a network multifunction peripheral and a client terminal that constitute a network printing system according to an embodiment. FIG. It is a sequence diagram which shows the process sequence of the user registration by the network printing system which concerns on embodiment, update, and a deletion process. It is a figure which shows the example of data of a Get-Printer-Attributes (printer attribute acquisition) message. It is a figure which shows the example of data of the response message of Get-Printer-Attributes (printer attribute acquisition). It is a figure which shows the example of data of a Check-User-Operation (user operation check) message. It is a figure which shows the example of data of the response message of Check-User-Operation (user operation check). It is a figure which shows the example of data of an Add-User-Information (user registration) message. It is a figure which shows the example of data of the response message of Add-User-Information (user registration). It is a sequence diagram showing a processing procedure of scan to print processing by the network printing system according to the embodiment. It is a figure which shows the format of IPP.

Explanation of symbols

1 Network Printing System 2 Network Multifunction Machine 3 Client Terminal 5 Internet 6 LAN
7 PSTN
8 First firewall 9 Second firewall 11 Control unit 12 Server 13 Decoding unit 15 Operation unit 16 Display unit 17 Reading unit 18 Recording unit 19 Codec 20 Image storage unit 21 Modem 22 NCU
23 IFAX control unit 24 LAN interface 30 transmission unit 31 encryption unit

Claims (7)

A client terminal connected to a network MFP via the Internet,
An IPP operation request including an operation ID set in an IPP vendor extension area is encoded as an HTTP message body, and a transmission unit is provided that transmits a specified TCP port to the network MFP. Client terminal. The network multifunction device is connected to the Internet through a firewall,
The client terminal according to claim 1, wherein the transmission unit specifies a TCP port 80 as the predetermined TCP port. A network multifunction device connected to the client terminal according to claim 1 or 2 via the Internet,
Receiving means for receiving an IPP operation request encoded as an HTTP message body transmitted from the client terminal through a designated TCP port;
And an operation means for executing the IPP operation request based on an operation ID included in the IPP operation request received by the receiving means. The client terminal according to claim 1 or 2,
A network printing system comprising: the network multifunction peripheral according to claim 3.   5. The network printing system according to claim 4, wherein the IPP operation request including the operation ID set in an IPP vendor extension area requests registration, update, and / or deletion of a user. .   The IPP operation request including the operation ID set in the IPP vendor extension area is a scan-to-print that outputs the scanned image data to a preset printer, or a scan-to-store that stores the scanned image data in a predetermined folder. 5. The network printing system according to claim 4, wherein the network printing system requests a folder. The client terminal comprises encryption means for encrypting the transmitted IPP operation request,
The network printing system according to claim 4, wherein the network multifunction device includes a decrypting unit that decrypts the encrypted IPP operation request.

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