Network system, network device, access restriction method for network device, storage medium, and program

• US 20010052018A1
• Filed: 05/31/2001
• Published: 12/13/2001
• Est. Priority Date: 06/12/2000
• Status: Active Grant

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Yokokura, Hidenori
• Granted Patent: US 7,240,118 B2
• Time in Patent Office: Days
• US Class Current: 709/229
• CPC Class Codes: H04L 63/10 for controlling access to devices or network resources
• CPC Class Codes: Y10S 707/99939 Privileged access

Abstract

When access is attempted by a device equipped with Web client capabilities, a device connected to a network and equipped with Web server capabilities judges whether to restrict the access. If it is judged that the access should be restricted, information about the reason for the access restriction is sent regardless of the information possessed by the device equipped with Web client capabilities.

Claims

1. A network-connectable device, comprising:

judging means for judging whether access by another device should be restricted; and

sending means for sending the reason for the access restriction if access by said other device is restricted.

2. The network-connectable device according to

claim 1

, further comprising:

detection means for detecting time information related to the information possessed by said other device,

wherein said sending means sends information which indicates the status of said other device according to the time information detected by said detection means, if access by said other device is not restricted.

3. The network-connectable device according to

claim 2

, wherein said sending means sends information which indicates the reason for the access restriction regardless of the time information sent by said other device if access by said other device is restricted.

4. A network-connectable device, comprising:

judging means for judging whether access by another device should be restricted;

detection means for detecting time information related to the information possessed by said other device; and

sending means for sending the status of said other device according to the judgment made by said judging means and the time information detected by said detection means.

5. The network-connectable device according to

claim 4

, wherein said sending means sends information which indicates the reason for the access restriction regardless of the time information sent by said other device if access by said other device is restricted.

6. A network system connected with a plurality of computers and a plurality of network devices wherein one of said computers is equipped with a Web client and another one of said computers and one of said network devices are equipped with a Web server, comprising:

determination means for determining to restrict access to said Web servers; and

notification means for sending data about the restriction on access to said Web server to said Web client if it has been determined to restrict access to said Web server.

7. The network system according to

claim 6

, wherein if it has been determined to restrict access to said Web server and if said Web client has specified the update date of said data, said notification means sends data about the restriction on access to said Web server to said Web client regardless of whether said data has been updated since the specified update date.

8. The network system according to

claim 7

, wherein said notification means notifies said Web client of the status of said plurality of network devices.

9. A control method for a network-connectable device, comprising:

a judging step of judging whether access by another device should be restricted; and

a sending step of sending the reason for the access restriction if access by said other device is restricted.

10. A control method for a network-connectable device, comprising:

a judging step of judging whether access by another device should be restricted;

a detection step of detecting time information related to the information possessed by said other device; and

a sending step of sending the status of said other device according to the judgment made by said judging step and the time information detected by said detection step.

11. A network system connected with a plurality of computers and a plurality of network devices, in which one of said computers is equipped with a Web client and another one of said computers and one of said network devices are equipped with a Web server, comprising:

a determination step of determining to restrict access to said Web servers; and

a notification step of sending data about the restriction on access to said Web server to said Web client if it has been determined to restrict access to said Web server.