JP2002063008A - Printer user limiting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printer user limiting system connected to a network with a terminal device and capable of suitably limiting a printing request from the terminal device for each user. SOLUTION: In a network system, the user selects a printer device to output on a client computer and a parameter such as a name of the user is obtained, to make inquiry on printability to a user limit server. In the user limiting server, the name of the user transmitted is made to be a key and the printability is determined, by referring to a user control table. When the name of the user is registered, an addition request for access right of the client computer is made, with respect to a designated printer device and an IP address, where the printer device is requested to be added to an access control list is added. The client computer issues a connection request to the printer device, when the result of the determination of the printability by the user limiting server permits printing. The printer device determines connectability, by checking whether an IP address of the client computer is registered in the access control list.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer user restriction system, and more particularly, to a printer user restriction system which is connected to a network together with a plurality of terminal devices such as information processing devices, and uses the printer from the terminal device for each user. The present invention relates to a printer user restriction system to be restricted.

[0002]

2. Description of the Related Art In recent years, in offices and the like,
(Local Area Network) and the like, and an information processing device (terminal device) such as a personal computer or a word processor, a printer device, and the like are connected via the network, and file sharing and printer device sharing are performed. It has become.

In recent years, NICs have been added to printers themselves.
By mounting an interface card called a (Network Interface Card), a printer device can perform protocol processing for transmitting and receiving packets on a LAN. In the protocol processing using the NIC, print data can be received at a very high speed as compared with the processing using the conventional Centronics interface or RS-232C interface, and the printer device can be shared with the network very easily. And it has become mainstream in many office environments.

[0004] The form of sharing the printer device can be roughly divided into two types. Software called a print server is executed on terminal devices connected on the same network, and each client terminal device is sent to the print server. A print server method in which a print instruction is issued to the printer device via the print server to send a print instruction to the printer device, and each client device directly transmits print data to the printer device to perform printing. There is a direct print method.

In the print server method, it is easy to centrally manage the entire network, such as user management, billing management, and usage restrictions, with the print server. On the other hand, printing speed is controlled via the print server. Therefore, the data arrival route may be long, and the route may be slow.

[0006] On the other hand, the direct printing method allows the fastest transfer in terms of printing speed, but is inadequate functionally in terms of printer management.

However, in the direct printing method, in principle, a high-performance management function can be installed in firmware on the NIC. However, a CPU (Central Processing Unit), OS
(Operating System), ROM (Read Only Memory) capacity, RAM (Random Access Memory) capacity and the like are difficult.

Further, as a form of sharing a printer, there is also a form in which the advantages of the above two methods are combined, management is performed by a dedicated server computer, and print data is transmitted directly from the client terminal to the printer. ing.

One of the problems often encountered when sharing a device is that the user wants to restrict users. Even when a printer is shared on a network, an outsider can use the printer to access the printer. This is problematic in that the consumption of consumables such as paper and toner due to accessing and printing the apparatus is suppressed, and the congestion rate of use of the printer apparatus is reduced.

Conventionally, in order to solve this problem, print management is performed by a print server of a dedicated computer, and as a user restricting means in a case where transfer of print data is directly transmitted from a client computer to a printer device,
A method is used in which authentication is performed by a print server, authentication data indicating that authentication is performed is added by a client to print data, and the print data is transmitted from a client computer to a printer device.

[0011] However, such a method actually requires some contrivance such as encrypting the authentication data, and has a problem that the implementation is complicated.

Therefore, the applicant of the present invention firstly connects a plurality of terminals and a printer to a network, and the printer
In a printer system that performs print processing based on print data in response to a print request from the terminal, the printer registers use permission / non-permission information for restricting permission / non-permission of use of the printer for each terminal. Registration information storage means to be executed, and when there is a print request from the terminal together with the use permission / non-permission information, whether the sent use permission / non-permission information is registered in the registration information storage means (Japanese Patent Application Laid-Open No. 9-288552) has been proposed.

That is, in this printer system, use permission / non-permission information for restricting permission / non-permission of use of the printer is registered for each terminal in the printer, and a print request is sent from the terminal together with the use permission / non-permission information. If there is, the permission / non-permission of use is controlled based on whether or not the transmitted use permission / non-permission information is registered.

[0014]

However, in the printer system described in the above publication, it is necessary to register use permission / non-permission information for restricting permission / non-permission of use of the printer for each terminal in the printer. In addition to the need for troublesome work, especially when the use is temporarily permitted and the use of the printer is completed, the use permission / non-permission information is frequently registered and deleted when the use is prohibited. It had to be performed, and there was a need for improvement in improving the usability.

Therefore, according to the first aspect of the present invention, when a terminal device and a printer are connected to a network and print processing is performed by the printer in response to a print request from the terminal device,
A server connected to the network has user management data storage means for registering a user who is permitted to use the printer as a user management list, and the printer uses an address of a terminal device to which access is permitted as an access permission list. An access that is stored in an access permission data storage unit and controls permission / non-permission of an access to a terminal requesting printing based on whether or not the address of the terminal is registered in an address permission list. Having a control function, before a user makes a print request to a printer using a terminal device, makes an authentication request specifying the printer to a server, and the server issues the user request to the authentication request. Is registered in the user management list as available, the address of the terminal device used by the user is In a system in which a server that manages print restrictions and a printer that receives print data are separated by requesting additional registration to the access permission list and permitting printing to a printer using the user's terminal device. Without restricting the use of complicated configurations and advanced technologies, implementing complex user management lists on printers, and adding authentication information to print data, It is an object of the present invention to provide a printer user restriction system capable of restricting printer users and improving usability.

According to a second aspect of the present invention, when the server completes the printing process of the terminal device of the address requesting the additional registration to the access permission list, the server transmits the address of the terminal device from the access permission list to the printer. By requesting deletion, it is possible to prevent users who temporarily use the printer on the network from being registered in a state in which they can print forever, and to perform more appropriate user restrictions and improve usability. The purpose of the present invention is to provide a printer user restriction system capable of performing the above operations.

[0017]

According to a first aspect of the present invention, there is provided a printer user restriction system in which a terminal device and a printer are connected to a network, and the printer performs print processing in response to a print request from the terminal device. A printer user restriction system for controlling whether or not printing is possible in accordance with the print request source, wherein user management data for registering a user who is permitted to use the printer as a user management list on the network. A server having a storage unit is connected, and the printer stores an address of the terminal device to which access is permitted in an access permission data storage unit as an access permission list, and transmits the print request to the terminal device. Access permission / non-permission based on whether or not the address of the terminal device is registered in the address permission list. Having an access control function of controlling permission, the user makes an authentication request specifying the printer to the server before making a print request to the printer using the terminal device, the server If the user has been registered as available in the user management list in response to the authentication request, additional registration of the address of the terminal device used by the user in the access permission list with the printer The above object is achieved by requesting the user to perform printing on the printer using the terminal device.

According to the above configuration, the terminal device and the printer are connected to the network, and when the printer performs print processing in response to a print request from the terminal device, the server connected to the network permits the use of the printer. The printer has a user management data storage unit for registering a user as a user management list, and the printer stores an address of a terminal device to which access is permitted in the access permission data storage unit as an access permission list, and makes a print request. Has an access control function of controlling access permission / non-permission based on whether or not the address of the terminal device is registered in the address permission list for the incoming terminal device. Prior to making a print request to the printer, the server makes an authentication request specifying the printer to the server. If the user is registered as available in the user management list in response to the authentication request, the printer requests the printer to additionally register the address of the terminal device used by the user in the access permission list, Since printing to a printer using the user's terminal device is permitted, use a complicated configuration and advanced technology even in a system in which a server that manages printing restrictions and a printer that receives print data are separated. Without using a complicated user management list on a printer or adding authentication information to print data, it is possible to appropriately restrict the use of the printer and to appropriately and inexpensively restrict printer users. And at the same time, the usability can be improved.

In this case, for example, as described in claim 2, the server sends the printer to the printer when the printing process of the terminal device of the address requested to be added to the access permission list is completed. It may be requested to delete the address of the terminal device from the access permission list.

According to the above configuration, when the server completes the printing process of the terminal device of the address requested to be added to the access permission list, the server deletes the address of the terminal device from the access permission list to the printer. Since the request is made, it is possible to prevent users who temporarily use the printer on the network from being registered in a state in which printing is possible forever, so that more appropriate user restrictions can be performed, and the usability can be improved. Can be improved.

[0021]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. It should be noted that the embodiments described below are preferred embodiments of the present invention, and therefore, various technically preferable limitations are added. However, the scope of the present invention is not limited to the following description. The embodiments are not limited to these embodiments unless otherwise specified.

FIGS. 1 to 5 show an embodiment of a printer user restriction system according to the present invention. FIG. 1 shows a network to which the embodiment of the printer user restriction system of the present invention is applied. 1 is a system configuration diagram of a system 1. FIG.

In FIG. 1, a network system 1
Is a user restriction server 3 on a network 2 such as a LAN,
A plurality of printer devices 4a to 4n and a plurality of client computers 5a to 5n are connected. Each of the client computers 5a to 5n on the network 2 has an IP address as an identifier uniquely determined on the network 2, and According to the address, the other terminal devices on the network 2, that is, the user restriction server 3, the printer devices 4a to 4n, and the other client computers are distinguished from each other.
n can be uniquely specified.

The above-mentioned user restriction server 3, printer device 4
a to 4n and client computers 5a to 5n
It is configured as shown in FIG.

That is, the use restriction server (server) 3
Has a user management table editing unit 10, a user management table storage unit 11, a printability determination unit 12, an access control list change unit 13, and the like.

The user management table storage unit (user management data storage unit) 11 includes a user management table (user) including information on whether or not the printing function can be used for each registered user (user). The user management table editing unit 10 edits the user management table in the user management table storage unit 11 according to an operation from the console of the user restriction server 3. In this user management table, for example, as shown in FIG. 3, a user name and availability information for each of the printers 4a to 4n are registered.
OOOO, △△△△, □□□□, etc., indicating a state in which the availability information of the printers 4a to 4c is registered for each user.

The print permission / inhibition judgment unit 12 receives a print permission / inhibition inquiry from the client computers 5a to 5n.
With reference to the user management table in the user management table storage unit 11, whether or not printing is possible is determined, and the determination result is sent back to the client computers 5a to 5n.

The access control list changing unit 13 transmits list change information for instructing the registered printer devices 4a to 4n to add or delete the access control list.

Each of the printer devices 4a to 4n includes an access control list storage unit 20, an access control unit 21, a print data receiving unit 22, a printing unit 23, and the like.

The access control list storage unit (access permission data storage means) 20 stores information on the client computers 5 a to 5 n that can accept connections as an access control list (access permission list), and accesses from the user restriction server 3. When list change information such as addition or deletion of a control list is transmitted, the access control list is added or deleted according to the list change information. The access control list storage unit 20 stores, as shown in FIG.
The access control addresses and access control masks of the client computers 5a to 5n are stored as an access control list, and the IP addresses of the accessible (printable) client computers 5a to 5n are stored.
Address is restricted. The access control list is shown in FIG.
For example, as an example, the access control address “10.168.2” for the three printer devices 4a to 4n is set.
24.50 ", and" 255.255.0.0 "," 255.25 "as access control masks.
5.255.0 "," 255.255.255.25 "
5 "is stored. If the access control address is "10.168.224.50" and the access control mask is "255.255.0.0", the IP addresses accessible to the printers 4a to 4n are: "10.168.224.0.0" to "10.16
8.255.255 ", and looking at the three client computers 5a to 5c in FIG. 1, these three client computers 5a to 5c
As shown in FIG. 1, the IP addresses of “10.168.224.50” and “10.16.
8.224.51 "and" 10.168.239.8 "
2 ", all of the client computers 5a to 5c in FIG. 1 can be accessed. The access control address is “10.168.224.50”.
And the access control mask is “255.255.25”
5.0 ", the IP address accessible to the printer devices 4a to 4n is" 10.168.224.
0 "to" 10.168.224.255 ", the client computers 5a and 5b in FIG. 1 become accessible, and the client computer 5c is denied access. Further, when the access control address is “10.168.224.50” and the access control mask is “255.255.255.255”, the IP addresses that can access the printer devices 4a to 4n are set.
The address is only "10.168.224.50", and only the client computer 5a in FIG.
Is denied access.

In principle, a plurality of access control lists can be set at the same time. However, the printer sharing function in the printer devices 4a to 4n according to the present embodiment is realized by an embedded system, and parameters and the like are also provided. Because it is not possible to store a large amount, in this embodiment,
It is assumed that access control can be performed only with a combination of one set of IP address (access control address) and mask value (access control mask).

The access control unit 21 responds to the print connection request from the client computers 5a to 5n based on the access control list in the access control list storage unit 20 as described above. It is determined whether the IP addresses 5a to 5n are accessible IP addresses and whether or not the client computers 5a to 5n permit the print connection request.

When the access control unit 21 receives a print request connection from the client computers 5a to 5n, the print data receiving unit 22 receives print data through the connection and disconnects the connection in response to the disconnection request.

The printing unit 23 actually prints the print data on paper based on the print data received by the print data receiving unit 22.

The client computers 5a to 5n
Is a printability inquiry unit 30, a parameter storage unit 3
1. Print application 32 and print data transmission unit 3
3 and so on.

The parameter storage unit 31 stores the address information of the IP address specifying the client computers 5a to 5n and the client computers 5a to 5n.
Parameters such as user information for identifying the user (user).

In response to a request from the print application 32, the print permission / inquiry inquiry section 30 acquires address information and user information from the parameter storage section 31 prior to printing, and prints the print permission / inhibition judgment section 12 of the user restriction server 3. In addition, it receives the print permission determination result from the print permission determination unit 12 and passes it to the print application 32.

The print application 32 is called from an information processing application such as a document creation application or a database application mounted on the client computers 5a to 5n, and inquires of the print availability inquiry section 30 about the print availability determination prior to printing. In addition, when receiving the determination result of the print permission, the print data is passed to the print data transmission unit 33, and the print request connection is made.

The print data transmitting section 33 is provided with the printer 4
A print connection request is issued to the printers a to 4n. When the print connection request is permitted, the print data received from the print application 32 is transmitted, and when the transmission of the print data is completed, the connection is disconnected.

Next, the operation of the present embodiment will be described. The network system 1 registers an access control list for restricting access for each of the printers 4a to 4n, and stores the printers 4a to 4n in the user restriction server 3.
Each time a user who can use the printer device 4a to 4n is registered, the user of the client computer 5a to 5n requests authentication to the user restriction server 3 prior to printing, and if the printer is usable, Devices 4a to 4n
This is characterized in that the IP addresses of the client computers 5a to 5n used by the user are added to the access control list of the user so that the user can use the printer devices 4a to 4n.

That is, in the network system 1, in the initial state, in the printer devices 4 a to 4 n, the access control list in the access control list storage unit 20 includes
The usable client computers 5a to 5n are not registered, and any of the client computers 5a to 5n are not registered.
The print requests from a to 5n are also rejected.
Each of the client computers 5a to 5n
The operation is performed with the P address assigned as described above.

Now, the client computer 5a is used by the user with the user name xxx, and the user restriction server 3
In the following description, it is assumed that the user logs in to the printer device and performs a printing process using the printer device 4a. As described above, “10.168.224.50” is assigned to the client computer 5a as the IP address.

This user, as shown in FIG.
Activate the print application 32 to print on the client computer 5a.
In this example, the printer device 4a is selected as n (step S101), and parameters such as the old address and the user name which are the communication addresses of the user restriction server 3 linked to the client computer 5a are stored in the parameter storage unit 31.
(Step S102), the print permission / inquiry unit 30 inquires of the print permission / inhibition determination unit 12 of the user server 3 about whether or not printing is possible (Step S103).

At the time of this inquiry, the IP address “10.168.224.
50 "and a user name" OOOO "as parameters.

The user restriction server 3 includes a printability determination unit 1
2 uses the user name “名 xxx” sent from the client computer 5a as a key to determine whether the user management table in the user management table storage unit 11 can be used by the specified printer device 4a. Scanning is performed to determine whether printing is possible (step S201).

If the result of the printability determination is that printing is not possible, the printability determination unit 12 notifies the client computer 5a that made the inquiry that printing is not possible, and if the result of the printability determination is printable. For example, the printer device 4 specified by the client computer 5a
a to the client computer 5a. That is, the printability determination unit 12
Requests that the IP address of the client computer 5a be added to the access control list through the access control list changing unit 13, and the IP address of the client computer 5a is added to the access control list of the access list storage unit 20 of the printer device 4a. When the addition is normally performed, the client computer 5a is notified that printing is possible (step S202).

When the access control list changing unit 13 of the user restriction server 3 receives a request to add an IP address to the access control list, the access control unit 21 of the printer device 4a accesses the access control list storage unit 20. The IP address requested to be added is added to the control list, and the access control list changing unit 13 notifies that the addition has been performed.
(Step S301).

When the client computer 5a makes an inquiry about the printability in step S103, the client computer 5a checks whether the result of the printability determination from the user restriction server 3 is printable (step S104). The printing process is stopped, and the process ends.

In step S104, if the result of the print permission determination is that printing is possible, the print application 32 of the client computer 5a causes the print data transmission unit 33 to issue a connection request to the printer device 4a (step S104).
105), it is checked whether the connection request was successful (step S106).

When the printer 4a receives a connection request from the client computer 5a, the access controller 2a
1 retrieves the IP address of the client computer 5a that has made the request, determines whether the IP address is permitted by the access control list in the access control list storage unit 20, and if permitted, accepts the connection. If not, the connection is rejected (step S302).

If the connection request fails in step S106, the client computer 5a stops the printing process, terminates the printer user restriction process, and accepts the connection to the printer device 4a, and performs printing through the connection. The print data is transmitted from the data transmission unit 33 to the printer device 4a and passed to the printer device 4a (step S10).
7).

In the printer device 4a, when the print data is transmitted, the print data receiving unit 22 receives the print data, passes the received print data to the print unit 23, and prints the print data on paper. (Step S303).

When the client computer 5a completes the transmission of the print data from the print data transmission section 33,
The connection with the printer device 4a is disconnected (step S10).
8) The printer device 4a disconnects the connection with the client computer 5a in response to the disconnection request from the client computer 5a (step S30).
4).

When the printing is completed, the client computer 5a transmits a print completion notification to the user restriction server 3 to indicate that the printing to the printer device 4a is completed (step S109).
Upon receiving a completion notification from the client computer 5a, the access control list changing unit 13 requests the printer device 4a to delete the access right of the client computer 5a, that is, from the access control list of the IP address of the client computer 5a. A request for deletion is made (step S203).

The printer device 4a is connected to the user restriction server 3
Receives a request to delete the access right of the client computer 5a from the access control list storage unit 20, the access control unit 21
The P address is deleted, and the process ends (step S305).

As described above, in the network system 1 of the present embodiment, the client computers 5a to 5n and the printers 4a to 4n are connected to the network 2,
When performing print processing in the printer devices 4a to 4n in response to print requests from the client computers 5a to 5n, the user restriction server 3 connected to the network 2
Has a user management table storage unit 11 for registering, as a user management table, a user who is permitted to use the printer devices 4a to 4n, and the printer devices 4a to 4n are connected to the client computers 5a to 5n for which access is permitted.
The P address is stored in the access control list storage unit 20 as an access control list, and the client computers 5a to 5n that make a print request are registered in the access control list with the I address of the client computer 5a to 5n.
It has an access control function of controlling permission / non-permission of access based on whether or not the P address is registered, and the user (user) can use the client computer 5a to 5n
Prior to making a print request to the printer devices 4a to 4n by using, an authentication request specifying the printer device 4a to 4n is made to the user restriction server 3, and the user restriction server 3 On the other hand, if the user is registered as available in the user management table, the user requests the printers 4a to 4n to additionally register the IP addresses of the client computers 5a to 5n used by the user in the access control list. Printer device 4 using the client computers 5a to 5n of the user
Printing to a to 4n is permitted.

Accordingly, the user restriction server 3 for managing the print restriction and the printer devices 4a to 4c for receiving the print data are provided.
4n without using a complicated configuration or advanced technology, and the printer device 4a
4 to 4n, the use can be appropriately restricted without mounting a complicated user management list (user management table) or adding authentication information to print data, and the printer user is appropriately and inexpensively restricted. And the usability can be improved.

Further, when the user restriction server 3 completes the printing process of the client computers 5a to 5n of the IP address requesting the additional registration to the access control list, the user restriction server 3 sends the printer devices 4a to 4n the information from the access control list. I of the client computers 5a to 5n
Requesting removal of P address.

Therefore, it is possible to prevent a user who temporarily uses the printer devices 4a to 4n of the network 2 from being registered in a printable state forever, and to perform more appropriate user restriction. And the usability can be improved.

Although the invention made by the inventor has been specifically described based on the preferred embodiments, the invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the invention. It goes without saying that it is possible.

For example, in the above-described embodiment, a case has been described in which printing is performed on the printers 4a to 4n. However, user restrictions are imposed on image processing devices other than the printers 4a to 4n and functions other than printing. The same can be applied to the case of performing.

In the above embodiment, the access control using the IP address is used as the access control. However, the access control method is not limited to the method using the IP address, but may be another type of access control. The same can be applied to control.

[0063]

According to the printer user restriction system according to the first aspect of the present invention, the terminal device and the printer are connected to the network, and when the printer performs a printing process in response to a print request from the terminal device, the network is connected to the network. The connected server has a user management data storage unit for registering a user who is permitted to use the printer as a user management list, and the printer is allowed to access the address of a terminal device to which access is permitted as an access permission list. An access control function for storing permission in a data storage unit and controlling permission / non-permission of an access to a terminal requesting printing based on whether or not the address of the terminal is registered in an address permission list; Before the user makes a print request to the printer using the terminal device, the user If the server makes an authentication request specifying the data and the server has registered the user in the user management list as being available for the authentication request, the address of the terminal device used by the user to the printer Requesting additional registration to the access permission list of the user, and permitting printing to the printer using the user's terminal device. Therefore, in a system in which a server for managing print restrictions and a printer for receiving print data are separated. Can be appropriately restricted without using a complicated configuration or advanced technology, and without implementing a complicated user management list on a printer or adding authentication information to print data. In addition to being able to appropriately and inexpensively restrict printer users, it is possible to improve usability.

According to the printer user restriction system according to the second aspect of the present invention, when the server completes the printing process of the terminal device of the address requesting the additional registration to the access permission list, the server sends the access permission list to the printer. Request to delete the address of the terminal device from the network device, it is possible to prevent the user who temporarily uses the printer on the network from being registered in a printable state forever, and a more appropriate user Restrictions can be made and usability can be improved.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a network system to which an embodiment of a printer user restriction system according to the present invention is applied.

FIG. 2 is a block diagram showing the principal parts of a user restriction server, a printer, and a client computer shown in FIG. 1;

FIG. 3 is a view showing an example of a user management table stored in a user management table storage unit of the user restriction server of FIG. 2;

FIG. 4 is a view showing an example of an access control list stored in an access control list storage unit of the printer shown in FIG. 2;

FIG. 5 is a flowchart showing printer user restriction processing in the network system of FIG. 1;

[Description of Signs] 1 Network system 2 Network 3 User restriction server 4a-4n Printer device 5a-5n Client computer 10 User management table editing unit 11 User management table storage unit 12 Print permission / inhibition judgment unit 13 Access control list change unit 20 Access Control list storage unit 21 Access control unit 22 Print data reception unit 23 Printing unit 30 Printability inquiry unit 31 Parameter storage unit 32 Print application 33 Print data transmission unit

Claims (2)

[Claims] 1. A printer, wherein a terminal device and a printer are connected to a network, and when a print process is performed by the printer in response to a print request from the terminal device, print enable / disable is controlled in accordance with the print request source. A server having user management data storage means for registering a user who is permitted to use the printer as a user management list, wherein the printer permits access to the network. The address of the terminal device is stored in an access permission data storage unit as an access permission list, and whether or not the address of the terminal device is registered in the address permission list for the terminal device requesting printing is determined. Access control function for controlling access permission / non-permission based on the terminal device. Prior to making a print request to the printer, the server issues an authentication request specifying the printer to the server, and the server registers the user in response to the authentication request as being available in the user management list. Requesting the printer to additionally register the address of the terminal device used by the user in the access permission list, and permitting the user to print to the printer using the terminal device. And a printer user restriction system. 2. The server according to claim 2, wherein, when printing processing of the terminal device at the address requested to be additionally registered in the access permission list is completed, the server deletes the address of the terminal device from the access permission list to the printer. 2. The printer user restriction system according to claim 1, wherein the request is issued.