JP2007156809A - Network device unit, network control method, computer-readable recording medium with control program recorded thereon, and network device control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a unauthorized user from changing or resetting network setting for a network device unit, when a device password is set for the network device unit. <P>SOLUTION: The network device unit is connected to an information processor, and has a reception means for receiving a request for changing the network setting of the network device unit transmitted from the information processor, a changing means for changing the network setting of the network device unit based on a request for changing the network setting of the network device unit received by the reception means, an identification means for identifying a mode for restricting access to the network device unit, and a control means for controlling whether or not to execute the request for changing the network setting of the network device unit. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a network device apparatus connected to a network, a network device control method and a network device control program in the network device apparatus.

  In recent years, a local area network (LAN) in which computers are connected to each other has become widespread, and such a local area network extends over a building floor or an entire building, a group of buildings (premises), a region, or a larger area. Can be built. Such networks are further connected to each other and can be connected to a global network.

  Each such interconnected LAN may have a variety of hardware interconnection technologies and a number of network protocols.

  A simple LAN separated from others can be managed by individual users. That is, the user can replace a device, install software, or diagnose a problem.

  On the other hand, large-scale complex LANs and large interconnected LAN groups require “management”. Here, “management” means management by both a human network administrator and software used by the administrator. In the following, “management” means management by software for managing the entire system, and “user” means a person who uses network management software. This user is usually the system administrator. The user can obtain management data on the network and change this data by using network management software.

  A large-scale network system is usually a dynamic system that is required to constantly add and remove network device devices, update software, and detect problems. In general, there are various systems owned by various people or supplied by various vendors.

  In such a LAN, each network device device is identified and operated and managed by a network address (hereinafter referred to as an address) unique to each network protocol.

  However, when a certain network device device is connected to the network for the first time (factory shipment state, etc.) or when resetting the network device device, the address is often not set or is not a valid address in many cases. Therefore, it is necessary for the user to set an arbitrary address for the network device device from the network management software or the like.

  When the network management software is used to set the address of a network device device (for example, a printer), some network protocol is required for communication from the network management software to the network device device.

  However, a standard network management protocol such as SNMP (Simple Network Management Protocol) cannot be used in a network device device in a factory-shipped state as described above because a standard address such as an IP address cannot be used. Therefore, as a method for performing the above address setting or the like, it is conceivable to implement a unique protocol that uses a MAC address as an identifier for device identification. The MAC address here is a physical address unique to the network device. In the case of Ethernet (registered trademark), the length is 6 bytes, and the first 3 bytes are managed / assigned as a vendor code by IEEE (Institute of Electrical and Electronic Engineers, American Institute of Electrical and Electronics Engineers). The remaining 3 bytes are codes managed independently by each vendor (so as not to overlap). As a result, there are no network device devices with the same physical address in the world, and all different addresses are assigned. become. In Ethernet (registered trademark), frames are transmitted and received based on this address.

  That is, in the case of a unique protocol using such a MAC address, the MAC address of a device on the network is acquired, a list of network device devices from which the MAC address is obtained is displayed, and the network device device is displayed from the list. Can be selected.

  Then, a target network device device is selected from a list displayed by the network management software, and an address of a network board connected to the network device device, a valid protocol, and the like are selected.

  Further, the network management software sets the network board of the network device device by transmitting the setting information as a setting packet to the network board of the target network device device.

  Once a valid IP address or the like can be set, network device devices can be managed from network management software using a standard network management protocol such as SNMP.

  In order to manage network device devices, the network management software supports a function for authenticating a device password for each network device device.

When the device password is authenticated, the device password set by the administrator on the network board is acquired from the network device device as necessary.If the device password matches the device password entered by the user, the network device device and the network board are Detailed information can be acquired and set. In the network management software, this state is called an administrator mode.
Japanese Patent No. 3486549

  However, in the above conventional example, since the change of the network setting by the unique protocol using the MAC address has no access restriction such as authentication, even after an effective IP address or the like is set in the network device device, an unauthorized user can There is a problem that the network setting of the network device device may be changed or reset by a unique protocol using a MAC address.

  It is an object of the present invention to provide an unauthorized user by not executing a request for changing the network setting of a network device device by a unique protocol using a MAC address when a device password of the network device device is set. However, an object of the present invention is to provide a network device that prevents the network settings of the network device device from being changed or reset.

  In order to achieve the above object, the present invention comprises the following arrangement. That is, a network device connected to the information processing apparatus via a network, and receiving means for receiving a request for changing the network setting of the network device apparatus transmitted from the information processing apparatus; Based on the request for changing the network setting of the network device apparatus received by the receiving means, the changing means for changing the network setting of the network device apparatus, and for restricting access to the network device apparatus Identification means for identifying a mode of the network device, and control means for controlling whether or not to execute a request for changing the network settings of the network device device according to the mode identified by the identification means. Features.

  As described above, according to the present invention, when the device password of the network device device is set, by not executing the request for changing the network setting of the network device device by the unique protocol using the MAC address, It is possible to prevent an unauthorized user from changing or resetting the network settings of the network device device.

Example 1
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 2 is a schematic diagram showing a network configuration when the network board according to the present embodiment is connected to a printer. The network board 201 is an example of a network device device connected to the LAN 200. The network board 201 is connected to the LAN 200 via an interface such as 10Base-T having RJ-45.

  A personal computer (PC) 203 is also connected to the LAN 200, and the PC 203 can communicate with the network board 201 via the LAN 200. In the PC 203, a network control program for managing the network is operated, and the network is controlled thereby. The request packet or response packet in FIG. 2 will be described later.

  Typically, the LAN 200 provides services to a somewhat local user group, for example, a user group on one floor in a building, or on consecutive floors of a building. When users are in different buildings, a wide area network (WAN) may be constructed according to the distance between the users. A WAN is basically a collection of LANs formed by connecting several LANs with high-speed digital lines such as an high-speed integrated services digital network (ISDN).

  FIG. 3 is a block diagram showing an outline of the internal configuration of the network board 201 and the printer 202 in FIG. The printer 202 includes a CPU 301, ROM 302, RAM 303, bus 304, engine control unit 305, I / O control unit 306, data I / O control unit 307, expansion I / F control unit 308, parallel I / F control unit 309, expansion A board bus 310, a printer engine 311, an LCD 312, and a keypad 313 are provided.

  A CPU 301 controls the entire printer. The ROM 302 stores a program for controlling the printer, and the RAM 303 is used as a work area for the CPU 301. Each control unit is connected to the bus 304. The engine control unit 305 controls the LBP engine, and the I / O control unit 306 controls the LCD 312 and the keypad 313 that receives key inputs. The data I / O control unit 307 performs input / output control of data with the outside, and controls the extended I / F control unit 318 and the parallel I / F control unit 309. The expansion I / F control unit 308 is connected to the network board 201 via the expansion board bus 310.

  The network board 201 includes a CPU 314, ROM 315, RAM 316, bus 317, extended I / F control unit 318, timer 320, and network I / F control unit 319.

  The CPU 314 controls the entire network board. The ROM 315 stores a program for controlling the network board, and the RAM 316 is used as a work area for the CPU 314. The network I / F control unit 319 controls communication with the network.

  The network board 201 can be connected not only to a printer but also to a facsimile machine, a copier, a multifunction machine, etc. as long as the network board 201 includes an extension board bus 310 that can be controlled by the extension I / F control unit 318. By using the network board, various devices can be connected to the network.

  Next, the configuration of the control program for the network board 201 will be described. FIG. 4 is a schematic diagram showing the configuration of the control program for the network board 201. First, the printer I / F driver module 401 controls the extended I / F control unit 310 to perform data transmission / reception with the printer. The print protocol module 402 supports a general purpose print protocol on the network. The network protocol communication module 403 performs communication control in the network. The network driver module 404 controls the network I / F control unit 319 and actually transmits / receives a packet to / from the network. The device management module 405 communicates with the PC 203 on the network, and performs setting and reference of information regarding the network board 201, setting and reference of printer information, and the like.

  The print protocol module 402 receives print data from the network using the network protocol communication module 403 according to the protocol print communication procedure. The received print data is sent to the printer via the printer I / F driver module 401. The network driver module 404 and the network protocol communication module 403 perform broadcast packet and multicast packet reception processing. The received data is sent to the device management module 405 according to the type of protocol.

  In this embodiment, the network protocol communication module 403 implements TCP / IP. For details on the individual items of the TCP / IP packet header and the IP address system, see “Detailed TCP / IP” (W. Richard Stevens = work / Naoji Inoue = supervision, Yasuo Tachibana = translation issued by Softbank Corp., 1997 3 Please refer to the first edition issued on March 31).

  Each module in FIG. 4 is stored as a control program in the ROM 315 in FIG. 3, and various functions of the network board described in this embodiment are realized by the CPU 314 in FIG. 3 executing these modules. Is done.

  FIG. 5 is a block diagram showing a configuration of the PC 203 capable of operating the network management software.

  In FIG. 5, a PC 203 is a PC on which network management software operates, and is equivalent to 203 in FIG. The PC 203 includes a CPU 501 that executes network management software that is stored in the ROM 502 or the hard disk (HD) 511 or that is supplied from the flexible disk drive (FD) 512. The PC 203 generally includes devices connected to the system bus 504. Control.

  Reference numeral 503 denotes a RAM which functions as a main memory, work area, and the like for the CPU 501. A keyboard controller (KBC) 505 controls an instruction input from a keyboard (KB) 509 or a pointing device (not shown). Reference numeral 506 denotes a CRT controller (CRTC) which controls display on a CRT display (CRT) 510. A disk controller (DKC) 507 controls access to a hard disk (HD) 511 and a flexible disk controller (FD) 512 that store a boot program, various applications, editing files, user files, network management software, and the like. Reference numeral 508 denotes a network interface card (NIC) that exchanges data bidirectionally with an agent or a network device via the LAN 200.

  Next, the configuration of the network management apparatus and software will be described.

  The network management apparatus is realized on a PC as shown in FIG. The hard disk (HD) 511 stores a program of network management software that is an operation subject in all the descriptions below. In all the descriptions below, unless otherwise specified, the execution subject is the CPU 501 on hardware. On the other hand, the subject of software control is network management software stored in the hard disk (HD) 511. For example, the OS is assumed to be Windows (registered trademark) manufactured by Microsoft (Microsoft is a registered trademark), but is not limited thereto.

  The network management software may be supplied in a form stored in a storage medium such as a flexible disk or a CD-ROM. In this case, the flexible disk controller (FD) 512 shown in FIG. 5 or a CD-ROM (not shown) is used. A program is read from a storage medium by a drive or the like and installed in a hard disk (HD) 511.

  FIG. 6 is a module configuration diagram of the network management software.

  The network management software is stored in the hard disk 511 in FIG. 5 and is executed by the CPU 501. At that time, the CPU 501 uses the RAM 503 as a work area.

  In FIG. 6, reference numeral 601 denotes a device list module that displays a list of devices connected to the network. Reference numeral 602 denotes an overall control module that controls other modules based on instructions from the device list. Reference numeral 603 denotes a configurator, which is a module that performs special processing related to device network settings. In particular, when a factory-shipped network device is connected to a LAN for the first time, the network device is set using a special protocol described later. Reference numeral 604 denotes a search module that searches for a device connected to the network. The devices searched by the search module 604 are displayed in a list by the device list 601. An ICMP module 605 controls the ICMP protocol. ICMP is a protocol for TCP / IP control defined by RFC 792 of IETF, and is standardly implemented in terminals / devices that implement TCP / IP.

  Reference numerals 606 and 607 denote UI modules for displaying a device detail window, which will be described later, and there is a UI module for each target model for displaying detailed information. Reference numerals 608 and 609 are referred to as control modules, and are modules responsible for control specific to the target model for which detailed information is acquired. Similar to the UI module, a control module also exists for each target model that displays detailed information. The control A module 608 and the control B module 609 obtain MIB data from the management target device using the MIB module 610, convert the data as necessary, and transfer the data to the corresponding UI A module 606 or UI B module 607, respectively. Pass data.

  The MIB module 610 is a module that performs conversion between an object identifier and an object key. Here, the object key is a 32-bit integer corresponding one-to-one with the object identifier. The object identifier is a variable-length identifier and is difficult to handle when implementing the network management software. Therefore, in the network management software according to the present application, a fixed-length identifier corresponding to the object identifier is used internally. . Modules above the MIB module 610 handle MIB information using this object key. Reference numeral 611 denotes an SNMP module, which transmits and receives SNMP packets.

  612 is called a common transport module, and is a module that absorbs differences in lower-layer protocols for carrying SNMP data. Actually, either the IPX handler 613 or the UDP handler 614 is responsible for transferring data depending on the protocol selected by the user during operation. The UDP handler 614 uses WinSock 615 as an implementation. WinSock is described, for example, in the specification of Windows (registered trademark) Socket API v1.1. This document can be obtained from a plurality of locations. For example, it is bundled with Visual C ++ which is a compiler manufactured by Microsoft (Microsoft is a registered trademark).

  Next, a case where the unique setting reference protocol in the present embodiment is implemented by the TCP / IP protocol will be described. The unique setting reference protocol in the present embodiment is referred to as a configurator protocol. In the present embodiment, this configurator protocol is implemented on UDP (User Datagram Protocol).

  FIG. 7 is an explanatory diagram showing an example of a packet header of the configurator protocol. The configurator protocol uses UDP port number 0x83b6, and the destination IP address (Dest IP) in the request packet is “255.255.255.255” and the MAC address (Dest MAC) is 0xffffffffffff.

  The MAC address here is a physical address unique to the device. In the case of Ethernet (registered trademark), the MAC address is 6 bytes long, and the first 3 bytes are managed and assigned by the Institute of Electrical and Electronic Engineers (IEEE) as the vendor code. The remaining 3 bytes are codes managed by each vendor independently (to avoid duplication). As a result, there are no network devices having the same physical address in the world, and different addresses are allotted among the network devices.

  When the MAC address is 0xffffffffffff, the packet is treated as a broadcast packet, and all network device devices connected on the network receive this packet.

  With this configurator protocol, it is possible to set, refer to, and reset information related to the network board 201 from the PC 203 of FIG. 2, and to search for network device devices such as network boards.

  Next, the data portion of the packet in the configurator protocol will be described. FIG. 8 is a schematic diagram of the structure of the data portion of a packet in the configurator protocol.

  In FIG. 8, AAA Valid is AppleTalk Valid (AppleTalk is a registered trademark), and AAA information is AppleTalk (AppleTalk is a registered trademark) information.

  Details of each parameter are as follows.

(1) Version (2 bytes)
Indicates the version. This version is 0x0300.

(2) Request Code
Code indicating the function requested in this packet 0: Set (setting)
1: Get (reference)
2: NVRAM-Reset (reset with NVRAM value)
3: Factory-Reset (factory reset)
4: Discovery
(3) Result Code (2 bytes)
Code indicating the requested result 0 × 0000: Success 0 × 0001: Media type error 0 × 0002: No specified protocol stack 0 × 0003: Version error 0 × FFFF: Detail unknown error (4) Media type (2 bytes)
Indicates communication media.

0: Ethernet (registered trademark)
(5) Protocol Info
Flag corresponding to each protocol information. When the Request Code is 0 (set), only information related to the protocol whose corresponding byte is 1 is set.

(6) NetWare Info
This is a field for setting and referring to information related to NetWare.

FrameType (2 bytes)
Frame type used in NetWare <Ethernet (registered trademark)>
0: Disable (NetWare cannot be used)
1: 802.3
2: 802.2
4: Ethernet (registered trademark) II
8: 802.2 SNAP
(7) TcpIp Info
This is a field for setting and referring to information related to TcpIp.

FrameType (2 bytes)
Frame type used in Tcpip 0: Disable (TcpIp cannot be used)
4: Ethernet (registered trademark) II
IP Mode (2 bytes)
The following values are ORed when referring to the operation mode.

0: IP fixed (rises from NVRAM value)
1: BOOTP valid
2: RARP valid
4: DHCP valid
IP address (4 bytes)
IP address of network address Gateway address (4 bytes)
Network board gateway Subnet mask (4 bytes)
Network board subnet mask Broadcast address (4 bytes)
Network board broadcast address (8) AppleTalk (AppleTalk is a registered trademark) Info
This field is used to set and refer to information related to AppleTalk (AppleTalk is a registered trademark).

FrameType (2 bytes)
Frame type used in AppleTalk (AppleTalk is a registered trademark) 0: Disable (AppleTalk (AppleTalk is a registered trademark) Not available)
2: Phase 2
(9) MAC address MAC address of the board.

  This packet is ignored if the ReawardCode is other than 4 (Discovery) and the MAC address value stored here does not match the MAC address of the network board.

  Each item is set to a value determined at the time of factory shipment, which is called a factory initial value.

  FIG. 9 is a sequence diagram showing a state of transmission / reception of the configurator packet between the network management software and the network board. The time axis is from the top to the bottom in the vertical direction.

  In order to perform network setting of the network board 201, the configurator 603 activated from the UI module 606 transmits a Discovery request packet 900. As described above, the Discovery request packet 900 is a broadcast packet having a transmission destination IP address = 255.255.255.255, and therefore reaches all network devices connected to the same subnet.

  The configurator 603 receives the Discovery response packet 901 transmitted from each network device device (which implements the configurator protocol) that has received the Discovery request packet 900. At this time, the data part of each received Discovery response packet 901 is recorded on the RAM 503.

  The configurator 603 performs reception until a predetermined waiting time expires. Meanwhile, the UI module 606 displays the dialog box shown in FIG. When the waiting time expires, the UI module 606 closes the dialog box (FIG. 10), obtains the data portion of each received Discovery response packet 901 from the RAM 503, and creates a list of the MAC address of the network board and the current network settings. The UI module 606 displays the list (FIG. 11).

  Waiting for the user to select an arbitrary network board or a button such as “redetect” or “cancel” from the list in the dialog box of FIG.

  If one of the network boards displayed in the list is selected by the user and the “Next” button is pressed, the UI module 606 displays a dialog box shown in FIG. Here, the network setting for the network board selected by the user (here, the network board 201) is input, and the configurator 603 creates and transmits a Set request packet 902 based on the input value. The value input by the user is set in the “Protocol Info” field of the data part of the Set request packet 902 as described above. Further, the Set request packet 902 is placed in a frame whose destination is the MAC address obtained by the Discovery response packet 901, and is therefore ignored except for the network board corresponding to the MAC address. Therefore, the Set request packet 902 is received only by the network board 201. The network device (in this case, the printer 202) that has received the Set request packet 902 sets various setting values placed in the data part of the Set request packet 902 according to the configurator protocol by the configurator included therein. Thereby, the network setting of the printer 202 is completed. On the other hand, if the cancel button is pressed, the list display is erased as it is, and the process is terminated. If the re-detect button is pressed, the process repeats from the search packet (Discovery request packet 900) broadcast.

  When the network setting of the printer 202 is completed, the UI module 606 displays a dialog box shown in FIG. When the completion button is pressed here, the Reset request 904 and the response 905 in FIG. 9 are exchanged to initialize the setting, and the network board can be automatically reset to make the new setting effective.

  Hereinafter, the operation of the network device apparatus will be described.

  FIG. 1 is a flowchart showing a processing flow of the device management module 406 mounted on the network board 201.

  Broadcast packets and multicast packets from the PC 203 are received by the network driver module 404 and the network protocol communication module 403. If the received packet is based on the configurator protocol, it is passed to the device management module 405.

  In this embodiment, since the configurator protocol is implemented by TCP / IP, the broadcast packet by the configurator protocol has a packet format as shown in FIG. In the network communication module 403, when the packet protocol type is UDP (when the protocol in FIG. 5 is 0x11) and the port number (Dest Port in FIG. 5) is 0x83b6, the packet is based on the configurator protocol. And pass to the device management module 405.

  The device management module 405 reads the device password from the network device device in step S101 of FIG. In step S102, it is determined whether a device password is set for the network device device.

  Whether or not a device password is set can be determined based on whether or not the read device password is NULL (a character string having a length of 0).

  If the determination in step S102 is YES, the process proceeds to step S103, and if NO, the process proceeds to step S116.

  In step S103, it is determined whether the value of Request Code (see FIG. 8) in the data portion of the packet is 2 (setting request). If the value is 2, the process proceeds to step S109, and if not 2, the process proceeds to step S104. If it is determined in step S103 that a setting request has been made, various information on the board is changed and set based on the setting information sent from the network management software (step S109), and a response packet is transmitted (step S109). Step S110).

  In step S104, it is determined whether the value of Request Code (see FIG. 8) in the data portion of the packet is 2 or 3 (reset request). If the value is 2 or 3, the process proceeds to step S111, and if it is not 2 or 3, the process proceeds to step S105. If it is determined in step S104 that there is a reset request, first, a response packet is transmitted (step S111), and then reset is performed (step S112). At this time, when the value of Request Code in FIG. 8 is 2, the reset is performed with the initial value as the NVRAM value, and when the value is 3, the reset is performed with the initial value as the factory initial value.

  In step S105, it is determined whether the value of Request Code (see FIG. 8) in the data portion of the packet is 4 (search request). If the value is 4, the process proceeds to step S113, and if not 4, the process proceeds to step S106. If it is determined in step S105 that there is a search request, a response packet is transmitted (step S113).

  In step S106, it is determined whether the value of Request Code (see FIG. 8) in the data portion of the packet is 1 (reference request). If the value is 1, the process proceeds to step S114, and if not, the process proceeds to step S107. If it is determined in step S106 that there is a reference request, reference information is created (step S114), and the reference information is stored in a response packet and transmitted (step S115).

  In step S107, the packet is discarded as a request that cannot be processed.

  In step S108, an error response packet is transmitted.

  In step S116, it is determined whether the value of Request Code (see FIG. 8) in the data portion of the packet is 2 (setting request). If the value is 2, the process proceeds to step S107, and if not 2, the process proceeds to step S117.

  In step S117, it is determined whether the value of Request Code (see FIG. 8) in the data portion of the packet is 2 or 3 (reset request). If the value is 2 or 3, the process proceeds to step S107, and if not 2 or 3, the process proceeds to step S105.

  A control program for the CPU 314 of FIG. 3 to operate as the device management module and the SNMP agent of this embodiment is stored in the ROM 316. The present invention is realized by the CPU 314 executing a control program as shown in the flowchart of FIG.

  Again, in order to validate the change of the network setting by the configurator protocol, it becomes possible by invalidating the device password of the network device device.

  As an example, it is conceivable to overwrite the device password with NULL (character string of length 0) from the device management software. Alternatively, it is conceivable to initialize the network device device and clear all current setting values.

(Example 2)
Although the present invention has been described as not processing a setting request and a reset request to the network device device by the configurator packet when a device password is set, the present invention is not limited to this. For example, the search request and the reference request may not be processed. Alternatively, a selection unit may be provided so that any request is not processed.

(Example 3)
Even if the present invention is applied to a system composed of a plurality of devices (for example, a host computer, an interface device, a reader, a printer, etc.), it is also applied to an apparatus composed of a single device (for example, a copier, a facsimile machine, etc.). May be.

Example 4
In the present invention, a storage medium storing a program code of a control program for realizing the functions of the above-described embodiments is supplied to a system or apparatus, and the computer (or CPU or MPU) of the system or apparatus is stored in the storage medium. It goes without saying that the object of the present invention can also be achieved by reading and executing the program code.

  In this case, the program code itself read from the storage medium realizes the novel function of the present invention, and the storage medium storing the program code and the program code constitute the present invention.

  As a storage medium for supplying the program code, for example, a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used.

  In addition, the functions of the above-described embodiments are realized by executing the program code read by the computer, and the OS running on the computer is one of the actual processes based on the instruction of the program code. The functions of the above-described embodiment can be realized by performing some or all of the processes.

  Further, after the program code read from the storage medium is written to a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function expansion is performed based on the instruction of the program code. The CPU or the like provided in the board or the function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments can be realized by the processing.

It is a figure which shows an example of the flowchart which shows the flow of the process in a present Example. It is the schematic which shows the structure of the network at the time of connecting a network board to a printer. It is a block diagram which shows the outline of an internal structure of a network board and a printer. It is the schematic which shows the structure of the control program of a network board. It is a figure which shows the structure of PC which can operate network management software. It is a module block diagram of network management software. It is a figure which shows an example of the packet format of a configurator packet. It is a figure which shows an example of the detail of the data part of a configurator packet. It is a figure which shows an example of the transmission / reception sequence of a configurator packet. It is a figure which shows an example of a dialog box. It is a figure which shows an example of a dialog box. It is a figure which shows an example of a dialog box. It is a figure which shows an example of a dialog box.

Explanation of symbols

200 LAN
201 Network Board 202 Printer 203 Personal Computer 301 CPU
302 ROM
303 RAM
304 Bus 305 Engine Control Unit 306 I / O Control Unit 307 Data I / O Control Unit 308 Expansion I / F Control Unit 309 Parallel I / F Control Unit 310 Expansion Board Bus 311 Printer Engine 312 LCD
313 Keypad 314 CPU
315 ROM
316 RAM
317 Bus 318 Extended I / F control unit 319 Timer 320 Network I / F control unit

Claims (8)

A network device device connected to an information processing device via a network,
Receiving means for receiving a request for changing network settings of the network device device transmitted from the information processing device;
Changing means for changing the network setting of the network device device based on the request for changing the network setting of the network device device received by the receiving means;
An identification means for identifying a mode for restricting access to the network device device;
A network device apparatus comprising: control means for controlling whether or not to execute a request for changing a network setting of the network device apparatus according to a mode identified by the identification means.   The network device apparatus according to claim 1, wherein the request for changing the network setting of the network device apparatus is a unique protocol using a MAC address. A network device device connected to an information processing device via a network,
Receiving means for receiving a request for resetting the network device device transmitted from the information processing device;
A reset means for resetting the network device device based on a request for resetting the network device device received by the receiving means;
An identification means for identifying a mode for restricting access to the network device device;
A network device apparatus comprising: control means for controlling whether or not to execute a request for resetting the network device apparatus according to a mode identified by the identification means.   4. The network device apparatus according to claim 3, wherein the request for resetting the network device apparatus is a unique protocol using a MAC address. A network device control method in a network device device connected to an information processing device via a network,
A receiving step of receiving a request for changing a network setting of the network device device transmitted from the information processing device;
A changing step for changing the network setting of the network device device based on the request for changing the network setting of the network device device received by the receiving step;
An identifying step for identifying a mode for restricting access to the network device device;
And a control step of controlling whether or not to execute a request for changing a network setting of the network device device according to the mode identified by the identifying step.   6. The network device control method according to claim 5, wherein the request for changing the network setting of the network device device is a unique protocol using a MAC address. A network device control method connected to an information processing apparatus via a network,
A receiving step of receiving a request for resetting the network device device transmitted from the information processing device;
A reset step for resetting the network device device based on the request for resetting the network device device received by the receiving step;
An identifying step for identifying a mode for restricting access to the network device device;
And a control step of controlling whether or not to execute a request for resetting the network device device according to the mode identified by the identifying step.   8. The network device control method according to claim 7, wherein the request for resetting the network device device is a unique protocol using a MAC address.

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