JP2024018397A - Communication device, computer program for communication device, and control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for achieving both suppression of unauthorized changes to setting values and user convenience in a situation where a password used for user authentication is an initial password.

SOLUTION: A communication device includes a change unit that changes a specific setting value in a memory from a current value to a value according to a change request when the change request is received from a terminal device and user authentication is successful. The change unit changes the specific setting value in the memory from the current value to the value according to the change request, when a password used for user authentication is an initial password and the specific setting value is a first type setting value. When the password used for user authentication is the initial password, and the specific setting value is a second type setting value that is different from the first type setting value, the specific setting value in the memory is maintained at the current value.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present specification relates to a communication device including a memory that stores a plurality of setting values.

Patent Document 1 discloses an image input/output device that executes MIB (Management Information Base) processing when determining that access is possible in user authentication. If the image input/output device determines that access is not possible, the image input/output device executes error response processing without executing MIB processing.

Japanese Patent Application Publication No. 2006-195755

An initial password may be set by the vendor of the image input/output device as a password used for user authentication. Although the initial password is provided by the vendor to the user of the image input/output device, it can be easily known by a third party other than the user. If the initial password is known to a third party, MIB processing may be executed fraudulently.

This specification provides a technique for achieving both suppression of unauthorized changes to setting values and user convenience in a situation where the password used for user authentication is an initial password.

A communication device disclosed herein includes a memory that stores a plurality of setting values including a specific setting value, and receives a change request from a terminal device requesting to change the specific setting value in the memory. an authentication unit that authenticates a user of the terminal device that is the source of the change request; and when the change request is received from the terminal device and the user is successfully authenticated, a change unit that changes the specific setting value in the memory from a current value to a value according to the change request, the change unit configured to change the password used for authentication of the user to be an initial password; and, when the specific setting value is a first type setting value, changing the specific setting value in the memory from the current value to a value according to the change request, and using it for authentication of the user. When the password set is the initial password and the specific setting value is a second type setting value different from the first type setting value, the specific setting value in the memory is the same as the first type setting value. the specific setting value is maintained at the current value, and the changing unit changes the specific setting value to the first type setting value and the second type setting value when the password used for authentication of the user is a password different from the initial password. Regardless of the type of setting value, the specific setting value in the memory is changed from the current value to a value according to the change request.

For example, when the password used for user authentication is the initial password, a comparative example is assumed in which changing of any of the plurality of setting values is not permitted. In this comparative example, while it is possible to prevent the initial password from being known by a third party and the setting value being changed illegally, the user cannot change the setting value if the initial password remains unchanged. On the other hand, according to the above configuration, if the password used for user authentication is the initial password, the second type setting value is not allowed to be changed, but the first type setting value is not changed. Changes are permitted. That is, for the second type of setting value, priority is given to suppressing unauthorized changes to the setting value, and for the first type of setting value, priority is given to the intention of the user who desires to change the setting value. In a situation where the password used for user authentication is the initial password, it is possible to achieve both suppression of unauthorized changes to setting values and convenience for the user.

A computer program for implementing the above-described communication device and a computer-readable storage medium that stores the computer program are also new and useful. Also, the method performed by the communication device described above is novel and useful.

The configuration of the communication system is shown. A flowchart of printer processing is shown. A flowchart of POST processing is shown. A specific case is shown.

(Configuration of communication system 2; Figure 1)
As shown in FIG. 1, the communication system 2 includes a printer 10 and a terminal device 100. Each device 10, 100 is connected to a LAN (abbreviation for Local Area Network) 6 and can communicate with each other via the LAN 6. The LAN 6 may be a wired LAN or a wireless LAN. The terminal device 100 is a user terminal such as a desktop PC, a notebook PC, a tablet PC, or a mobile phone (for example, a smartphone). In this embodiment, the printer 10 writes or transmits setting values in response to a request command (that is, a POST command or a GET command, which will be described later) from the terminal device 100.

(Configuration of printer 10)
The printer 10 is a peripheral device (for example, a peripheral device of the terminal device 100) that can execute a printing function. In a modified example, the printer 10 may be a multi-function device that can perform a scanning function, a FAX function, etc. in addition to the printing function. The printer 10 includes an operation section 12, a display section 14, a LAN interface 16, a print execution section 18, and a control section 30. Each part 12 to 30 is connected to a bus line (numerals omitted). Note that, hereinafter, "interface" will be referred to as "I/F".

The operation unit 12 includes a plurality of keys. A user can input various instructions to the printer 10 by operating the operation unit 12. The display unit 14 is a display that displays various information. The display unit 14 also functions as a so-called touch panel (that is, an operation unit that accepts user operations). LANI/F16 is connected to LAN6. The printing execution unit 18 includes a printing mechanism such as an inkjet type or a laser type.

The control unit 30 includes a CPU 32, a nonvolatile memory 34A, and a volatile memory 34B. The CPU 32 executes various processes according to the program 36 stored in the nonvolatile memory 34A. The nonvolatile memory 34A is a memory whose stored information is not erased even if the printer 10 is powered off. The nonvolatile memory 34A stores a management table 38 in addition to the program 36. The volatile memory 34B is a memory whose stored information is erased when the power of the printer 10 is turned off. The volatile memory 34B temporarily stores information necessary for the CPU 32 to execute processing.

The management table 38 is a table for storing various information about the printer 10. The information includes, for example, the remaining amount of consumables of the printer 10, MAC address, name (for example, administrator name), password (for example, administrator password), initial administrator password, IP address, clock information, and the like. The administrator password is the current value of the password used to authenticate the administrator indicated by the administrator name. The administrator password can be changed by the user of the printer 10. The initial administrator password is the initial value of the administrator password. The initial administrator password is stored in advance in the management table 38 by the vendor of the printer 10 at the shipping stage. The initial administrator password is written, for example, on a paper medium (for example, an instruction manual) packed together with the printer 10. The user of the printer 10 can learn the initial administrator password by looking at the paper medium.

Furthermore, the management table 38 can store individual user names and individual passwords. The individual user name is a user who is permitted by the administrator to access at least a portion of the management table 38 of the printer 10. The individual password is a password used to authenticate an individual user. The individual user name and individual password are stored in the management table 38 by the administrator.

Information not exemplified in the management table 38 of FIG. 1 includes, for example, the installation location of the printer 10, access destination, error history, status (printing in progress, standby, etc.), print settings (for example, default print resolution), and the like. The management table 38 stores the various information described above using a tree structure (that is, a hierarchical structure). A collection of various information having this tree structure is called "MIB" (abbreviation for Management Information Base).

Specifically, the management table 38 stores contents, OID (abbreviation for Object ID), and MIB values in association with each other. The content is a character string that indicates the meaning of the information. OID is an identifier that identifies information. The MIB value indicates a specific value of information (ie, a set value).

(Communication protocol between printer 10 and terminal device 100)
The communication protocol for communicating MIB values between the printer 10 and the terminal device 100 is a protocol that follows UDP (abbreviation for User Datagram Protocol) of the transport layer of the OSI (abbreviation for Open Systems Interconnection) reference model. widely known. Specifically, SNMP (abbreviation for Simple Network Management Protocol) is known. The present inventors created the use of a communication protocol that follows TCP (abbreviation for Transmission Control Protocol) of the transport layer of the OSI reference model, instead of UDP, as a communication protocol for communicating MIB values. . Specifically, he created the use of HTTPS (abbreviation for Hyper Text Transfer Protocol Secure). This is because HTTPS has higher security than SNMP because it employs user authentication and data encryption. Thereby, it is possible to prevent the MIB value of the printer 10 from being illegally written or illegally acquired by a third party.

The terminal device 100 can write MIB values to the printer 10 using an HTTPS POST command, and can also acquire MIB values from the printer 10 using an HTTPS GET command. Usually, HTTPS commands and their response commands employ general-purpose formats such as JSON (abbreviation for Java Script Object Notation) and XML (abbreviation for Extensible Markup Language).

(Printer processing; Figure 2)
With reference to FIG. 2, the processing executed by the CPU 32 of the printer 10 according to the program 36 will be described. The process shown in FIG. 2 is executed when the power of the printer 10 is turned on as a trigger. Note that communication with the terminal device 100 is performed via the LAN I/F 16. In the following, descriptions of "via LAN I/F16" and "via LAN 6" will be omitted unless otherwise mentioned.

In S10, the CPU 32 monitors reception of an HTTPS POST command from the terminal device 100. The POST command associates each of one or more OIDs specified by the user with a MIB value to be written to the management table 38 (hereinafter referred to as "MIB value to be written"). Including. Here, before receiving the POST command, the CPU 32 executes authentication communication with the terminal device 100 to authenticate the user of the terminal device 100. The authentication communication includes receiving an HTTPS command including authentication information from the terminal device 100. The authentication information is, for example, a hash value of a user name and password. The authentication communication is so-called digest authentication. For example, if the information obtained from the authentication information (i.e. user name and password) matches the information in the management table 38 (e.g. administrator name and administrator password (see FIG. 1)), the user of the terminal device 100 Authentication is successful. If the user authentication is successful, the POST command at S10 is encrypted using the encryption key.

If the CPU 32 determines that an HTTPS POST command has been received from the terminal device 100 (YES in S10), the process proceeds to S14. In S14, the CPU 32 determines whether or not the user of the terminal device 100 has been successfully authenticated. If the CPU 32 determines that the user authentication of the terminal device 100 has been successful (YES in S14), the process proceeds to S16.

In S16, the CPU 32 executes POST processing (described later in FIG. 3) according to the POST command in S10. When S16 ends, the CPU 32 returns to monitoring in S10.

Further, when the CPU 32 determines that the authentication of the user of the terminal device 100 has failed (NO in S14), the CPU 32 skips the process in S16 and returns to the monitoring in S10. Note that if a command other than the HTTPS POST command (for example, an SNMP GET command) is received, the processes after S14 are not executed, and the process (not shown) according to the command is executed.

(POST processing; Figure 3)
In S50, the CPU 32 selects one "key" from among the one or more "keys" included in the POST command in S10 of FIG. FIG. 4 shows a specific description of the POST command. As shown in FIG. 4, for each of one or more "keys", a set of the "key", OID, and MIB value to be written is described in the body portion of the POST command.

In S52, the CPU 32 determines whether the current administrator password matches the initial administrator password. If the CPU 32 determines that the current administrator password matches the initial administrator password (YES in S52), the process proceeds to S54.

In S54, the CPU 32 determines whether the OID included in the POST command in association with the one "key" selected in S50 (hereinafter referred to as "related OID") is the OID of the administrator password. do. If the CPU 32 determines that the related OID is the OID of the administrator password (YES in S54), the process proceeds to S56.

In S56, the CPU 32 determines whether the user name of the user who was authenticated in the authentication communication executed before receiving the POST command in S10 (hereinafter referred to as "authentication user name") is the administrator name. to decide. If the CPU 32 determines that the authenticated user name is the administrator name (YES in S56), the process proceeds to S60.

In S60, the CPU 32 identifies information included in association with the one "key" selected in S50 from the POST command (that is, the OID and the MIB value to be written). Then, the CPU 32 writes the specified MIB value to be written into the management table 38 in association with the specified OID. In other words, the MIB value stored in association with the specified OID in the management table 38 is changed to the MIB value to be written in the POST command.

In subsequent S62, the CPU 32 adds success status "0" to the processing response to the POST command. Success status "0" indicates that writing of the specified MIB value to be written has been successful. Specifically, as shown in Figure 4, a combination of "key", specified OID (for example, "1.3.6.1.4.1.xxxxxx.2"), and success status "0" is processed. Described in the body of the response.

In subsequent S70, the CPU 32 determines whether there is an unselected "key" among the one or more "keys" included in the POST command. If the CPU 32 determines that there is an unselected "key" among the one or more "keys" included in the POST command (YES in S70), the CPU 32 returns to S50 and selects another "key". .

Further, when the CPU 32 determines that there is no unselected "key" among the one or more "keys" included in the POST command (NO in S70), the process of FIG. 3 ends.

Further, when the CPU 32 determines that the current administrator password does not match the initial administrator password (NO in S52), the CPU 32 skips the process of S54 and proceeds to S56.

Further, if the CPU 32 determines that the related OID is not the OID of the administrator password (NO in S54), or if the CPU 32 determines that the authenticated user name is not the administrator name (NO in S56), the process proceeds to S64. A case where the authentication user name is not an administrator name is, for example, a case where the authentication user name is an individual user name.

S64 is similar to S62 except that a failure status of "-1" is added. The failure status "-1" indicates that writing of the specified MIB value to be written has failed. Specifically, as shown in FIG. Described in the body of the processing response.

In S66, the CPU 32 transmits a failure cause notification to the terminal device 100. The failure cause notification includes a message indicating the cause of failure in writing the MIB value. The cause is, for example, that the authentication user name is a user name other than the administrator's name, or that the related OID is an OID other than the OID of the administrator password. Upon completion of S66, the CPU 32 proceeds to S70.

Upon receiving the failure cause notification, the terminal device 100 displays a message in the failure cause notification. This allows the user to know the cause of failure in writing the MIB value. The failure cause notification is, for example, an HTTPS command. Note that in a modified example, the failure cause notification may be an email, SMS, SNS message, or the like.

(Specific case)
For example, if the current administrator password matches the initial administrator password and the related OID is the OID of the administrator password (YES in S52 and YES in S54), the MIB value to be written is written into the management table 38 (S60). That is, when the user instructs to change the initial administrator password to a new administrator password, the new administrator password, which is the MIB value to be written, is stored in the management table 38.

Additionally, if the current administrator password matches the initial administrator password and the related OID is not the OID of the administrator password (YES in S52 and NO in S54), the MIB value to be written is It is not written to the management table 38. That is, in a situation where the administrator password has not been changed from the initial administrator password, MIB values corresponding to OIDs other than the OID of the administrator password are maintained contrary to the user's instructions.

Furthermore, in a situation where the current administrator password does not match the initial administrator password (NO in S52), the determination in S54 as to whether or not the related OID is the OID of the administrator password is skipped, and the MIB to be written is The value is written to the management table 38.

For example, as shown in FIG. 4, when the user instructs to change the administrator password and IP address, changing the administrator password is permitted, but changing the IP address is not permitted.

For example, when the administrator password is the initial administrator password, a comparative example is assumed in which modification of any of a plurality of MIB values is not permitted. In this comparative example, while it is possible to prevent the initial administrator password from being known by a third party and the MIB values being changed illegally, the user is also prevented from changing the MIB values if the initial administrator password remains unchanged. Can not. On the other hand, according to the configuration of this embodiment, when the administrator password is the initial administrator password, changing the administrator password is permitted, but changing MIB values other than the administrator password is not allowed. Not allowed. That is, for MIB values other than the administrator password, priority is given to suppressing unauthorized changes to the MIB values, and regarding the administrator password, priority is given to the intention of the user who desires to change the administrator password. In a situation where the administrator password used for user authentication is the initial administrator password, it is possible to achieve both suppression of unauthorized changes to MIB values and convenience for the user.

Furthermore, if the authenticated user name is not the administrator's name (NO in S56), for example, if the authenticated user name is an individual user name, the printer 10 does not permit the MIB value to be changed. It is possible to prevent the administrator password from being changed by users other than the administrator.

(correspondence)
The printer 10 and the nonvolatile memory 34A are examples of a "communication device" and a "memory", respectively. An administrator password is an example of a "specific setting value." The MIB value in the management table 38 is an example of "a plurality of setting values." The terminal device 100 is an example of a "terminal device." A POST command is an example of a "change request." An administrator password and an initial administrator password are examples of a "password" and an "initial password," respectively. The administrator password and MIB values other than the administrator password are examples of "first type setting value" and "second type setting value," respectively. An administrator and an individual user are examples of a "first type user" and a "second type user," respectively.

S10 and S16 in FIG. 2 are examples of processes implemented by the "change request receiving unit" and the "changing unit", respectively. Authentication communication executed before S10 is an example of processing realized by the "authentication unit".

Although specific examples of the present invention have been described in detail above, these are merely illustrative and do not limit the scope of the claims. The techniques described in the claims include various modifications and changes to the specific examples illustrated above. Modifications of the above embodiment are listed below.

(Modification 1) The "communication device" is not limited to the printer 10, and may be, for example, a terminal device such as a desktop PC, a server, or the like.

(Modification 2) The "specific setting value" is not limited to the administrator password, and may be, for example, clock information, era name information, language setting value, etc.

(Modification 3) The communication protocol for communicating MIB values with the terminal device 100 is not limited to HTTPS, but may be HTTP, SNMP, or the like.

(Modification 4) The determination in S56 in FIG. 4 may not be performed. In this modification, "first type user" and "second type user" can be omitted.

(Modification 5) The process of S66 in FIG. 4 may not be executed. In this modification, the "notification section" can be omitted.

(Variation 6) In S66 of FIG. 4, an audio notification may be performed. Further, in another modification, a failure notification may be displayed on the display unit 14 of the printer 10.

(Modification 7) The management table 38 may have a data structure according to a method different from that of the MIB.

(Modification 8) In the above embodiment, the CPU 32 executes the program 36 to realize the processes shown in FIGS. 2 to 4. Alternatively, any of the processes may be realized by hardware such as a logic circuit.

Further, the technical elements described in this specification or the drawings exhibit technical usefulness singly or in various combinations, and are not limited to the combinations described in the claims as filed. Furthermore, the techniques illustrated in this specification or the drawings simultaneously achieve multiple objectives, and achieving one of the objectives has technical utility in itself.

Even if each claim is dependent on only some of the claims in the scope of claims as of the filing of this patent application, each claim can be dependent on only some of the claims. Not limited. To the extent not technically inconsistent, each claim may be dependent on other claims to which it was not dependent as filed. That is, the techniques of each claim can be combined in various ways as follows.
(Item 1)
A communication device,
a memory that stores multiple setting values including a specific setting value;
a change request receiving unit that receives a change request requesting to change the specific setting value in the memory from a terminal device;
an authentication unit that authenticates a user of the terminal device that is the source of the change request;
a changing unit that changes the specific setting value in the memory from a current value to a value according to the change request when the change request is received from the terminal device and the user authentication is successful;
Equipped with
The changing unit changes the specific setting value in the memory to the first type when the password used for authentication of the user is an initial password and the specific setting value is a first type setting value. Change the current value to the value according to the change request,
When the password used to authenticate the user is the initial password and the specific setting value is a second type setting value different from the first type setting value, the certain set values are maintained at said current values;
The changing unit is configured to change the specific setting value to either the first type setting value or the second type setting value when the password used to authenticate the user is different from the initial password. , changing the specific setting value in the memory from the current value to a value according to the change request;
Communication device.
(Item 2)
The communication device according to item 1, wherein the change request is a command compliant with HTTPS (abbreviation for Hypertext Transfer Protocol Secure).
(Item 3)
The changing unit is configured such that the password used for authentication of the user is the initial password, the specific setting value is the first type setting value, and the user is the first type user. in some cases, changing the specific setting value in the memory from the current value to a value according to the change request;
The password used to authenticate the user is the initial password, the specific setting value is a first type setting value, and the user is a second type user different from the first type user. 3. The communication device according to item 1 or 2, wherein the particular setting value in the memory is maintained at the current value if the user is a user of the device.
(Item 4)
The communication device according to any one of items 1 to 3, wherein the first type of setting value is the current value of the password.
(Item 5)
The communication device further includes:
If the password used to authenticate the user is the initial password, and the specific setting value is the second type setting value, the password used to authenticate the user is the initial password. The communication device according to any one of items 1 to 4, further comprising a notification unit that notifies that the change of the specific setting value has failed due to a certain reason.
(Item 6)
Each of the plurality of setting values is stored in the memory in association with OID (abbreviation of Object ID) of MIB (abbreviation of Management Information Base), and is associated with the communication described in any one of items 1 to 5. Device.
(Item 7)
A computer program for a communication device, the computer program comprising:
The communication device includes:
a memory that stores multiple setting values including a specific setting value;
computer and
Equipped with
The computer program causes the computer to run the following parts:
a change request receiving unit that receives a change request requesting to change the specific setting value in the memory from a terminal device;
an authentication unit that authenticates a user of the terminal device that is the source of the change request;
a changing unit that changes the specific setting value in the memory from a current value to a value according to the change request when the change request is received from the terminal device and the user authentication is successful;
function as
The changing unit changes the specific setting value in the memory to the first type when the password used for authentication of the user is an initial password and the specific setting value is a first type setting value. Change the current value to the value according to the change request,
When the password used to authenticate the user is the initial password and the specific setting value is a second type setting value different from the first type setting value, the certain set values are maintained at said current values;
The changing unit is configured to change the specific setting value to either the first type setting value or the second type setting value when the password used to authenticate the user is different from the initial password. , changing the specific setting value in the memory from the current value to a value according to the change request;
computer program.
(Item 8)
A method for controlling a communication device, the method comprising:
The communication device includes:
Equipped with a memory that stores multiple settings including specific settings,
The control method includes:
a change request receiving step of receiving a change request requesting to change the specific setting value in the memory from a terminal device;
an authentication step of authenticating a user of the terminal device that is the source of the change request;
a changing step of changing the specific setting value in the memory from a current value to a value according to the change request when the change request is received from the terminal device and the user authentication is successful;
Equipped with
The changing step includes changing the specific setting value in the memory to the first type when the password used for user authentication is an initial password and the specific setting value is a first type setting value. Change the current value to the value according to the change request,
When the password used to authenticate the user is the initial password and the specific setting value is a second type setting value different from the first type setting value, the certain set values are maintained at said current values;
The changing step includes determining whether the specific setting value is one of the first type setting value and the second type setting value when the password used for authentication of the user is different from the initial password. , changing the specific setting value in the memory from the current value to a value according to the change request;
Control method.

2: Communication system 6: LAN
10: Printer 12: Operation unit 14: Display unit 16: LANI/F
18: Print execution unit 30: Control unit 32: CPU
34A: Non-volatile memory 34B: Volatile memory 36: Program 38: Management table 100: Terminal device

Claims (8)

A communication device,
a memory that stores multiple setting values including a specific setting value;
a change request receiving unit that receives a change request requesting to change the specific setting value in the memory from a terminal device;
an authentication unit that authenticates a user of the terminal device that is the source of the change request;
a changing unit that changes the specific setting value in the memory from a current value to a value according to the change request when the change request is received from the terminal device and the user authentication is successful;
Equipped with
The changing unit changes the specific setting value in the memory to the first type when the password used for authentication of the user is an initial password and the specific setting value is a first type setting value. Change the current value to the value according to the change request,
When the password used to authenticate the user is the initial password and the specific setting value is a second type setting value different from the first type setting value, the certain set values are maintained at said current values;
The changing unit is configured to change the specific setting value to either the first type setting value or the second type setting value when the password used to authenticate the user is different from the initial password. , changing the specific setting value in the memory from the current value to a value according to the change request;
Communication device. The communication device according to claim 1, wherein the change request is a command compliant with HTTPS (abbreviation for Hypertext Transfer Protocol Secure). The changing unit is configured such that the password used for authentication of the user is the initial password, the specific setting value is the first type setting value, and the user is the first type user. in some cases, changing the specific setting value in the memory from the current value to a value according to the change request;
The password used to authenticate the user is the initial password, the specific setting value is a first type setting value, and the user is a second type user different from the first type user. 2. The communication device of claim 1, wherein the particular setting value in the memory is maintained at the current value if the user is a user of . The communication device according to any one of claims 1 to 3, wherein the first type of setting value is the current value of the password. The communication device further includes:
If the password used to authenticate the user is the initial password, and the specific setting value is the second type setting value, the password used to authenticate the user is the initial password. The communication device according to any one of claims 1 to 3, further comprising a notification unit that notifies that the change of the specific setting value has failed due to a certain reason. 4. The method according to claim 1, wherein each of the plurality of setting values is stored in the memory in association with an OID (abbreviation for Object ID) of an MIB (abbreviation for Management Information Base). Communication device. A computer program for a communication device, the computer program comprising:
The communication device includes:
a memory that stores multiple setting values including a specific setting value;
computer and
Equipped with
The computer program causes the computer to run the following parts:
a change request receiving unit that receives a change request requesting to change the specific setting value in the memory from a terminal device;
an authentication unit that authenticates a user of the terminal device that is the source of the change request;
a changing unit that changes the specific setting value in the memory from a current value to a value according to the change request when the change request is received from the terminal device and the user authentication is successful;
function as
The changing unit changes the specific setting value in the memory to the first type when the password used for authentication of the user is an initial password and the specific setting value is a first type setting value. Change the current value to the value according to the change request,
When the password used to authenticate the user is the initial password and the specific setting value is a second type setting value different from the first type setting value, the certain set values are maintained at said current values;
The changing unit is configured to change the specific setting value to either the first type setting value or the second type setting value when the password used to authenticate the user is different from the initial password. , changing the specific setting value in the memory from the current value to a value according to the change request;
computer program. A method for controlling a communication device, the method comprising:
The communication device includes:
Equipped with a memory that stores multiple settings including specific settings,
The control method includes:
a change request receiving step of receiving a change request requesting to change the specific setting value in the memory from a terminal device;
an authentication step of authenticating a user of the terminal device that is the source of the change request;
a changing step of changing the specific setting value in the memory from a current value to a value according to the change request when the change request is received from the terminal device and the user authentication is successful;
Equipped with
The changing step includes changing the specific setting value in the memory to the first type when the password used for user authentication is an initial password and the specific setting value is a first type setting value. Change the current value to the value according to the change request,
When the password used to authenticate the user is the initial password and the specific setting value is a second type setting value different from the first type setting value, the certain set values are maintained at said current values;
The changing step includes determining whether the specific setting value is one of the first type setting value and the second type setting value when the password used for authentication of the user is different from the initial password. , changing the specific setting value in the memory from the current value to a value according to the change request;
Control method.

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