Network device

• US 20050060407A1
• Filed: 08/20/2004
• Published: 03/17/2005
• Est. Priority Date: 08/27/2003
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Nagai, Yusuke
• Granted Patent: US 7,631,090 B2
• Time in Patent Office: Days
• US Class Current: 709/225
• CPC Class Codes: H04L 63/0236 Filtering by address, protocol, port number or service, e.g. IP-address or URL

Abstract

When it is judged that the IP address of a PC for the administrator is not included in IP addresses received from the PC for the administrator under accessing while a PC whose access is to be authorized is registered (NO in S20), the IP address of the PC for the administrator is registered besides IP addresses received for identifying PCs (S21). Meanwhile, when it is judged that the IP address of a PC for the administrator is included in IP addresses received from the PC for the administrator under accessing while a PC whose access is to be rejected is registered (YES in S43), the IP addresses received for identifying PCs are registered after excluding the IP address of the PC for the administrator therefrom (S21). This makes it possible to avoid a situation that an access from the terminal device for the administrator to a network device becomes impossible.

Claims

1. A network device, which is network-connected with a plurality of terminal devices and has a network filtering function for rejecting an access from a preliminarily registered terminal device among said plurality of terminal devices, comprising:

an identification information registration unit on which identification information for identifying a terminal device an access from which is to be rejected is registered;

detecting means for detecting identification information of a terminal device under accessing;

judging means for judging whether the identification information detected by said detecting means is included in received identification information or not, when identification information of a terminal device an access from which is to be rejected is received from the terminal device under accessing; and

registering means for, when said judging means judges that the identification information detected by said detecting means is included in the received identification information, registering the received identification information on said identification information registration unit after excluding the identification information detected by said detecting means from the received identification information.

2. A network device, which is network-connected with a plurality of terminal devices and has a network filtering function for authorizing an access from a preliminarily registered terminal device among said plurality of terminal devices, comprising:

an identification information registration unit on which identification information for identifying a terminal device an access from which is to be authorized is registered;

detecting means for detecting identification information of a terminal device under accessing;

judging means for judging whether the identification information detected by said detecting means is included in received identification information or not, when identification information of a terminal device an access from which is to be authorized is received from the terminal device under accessing; and

registering means for, when said judging means judges that the identification information detected by said detecting means is not included in the received identification information, registering the received identification information on said identification information registration unit after adding the identification information detected by said detecting means to the received identification information.

3. A network device, which is network-connected with a plurality of terminal devices and has a network filtering function for rejecting an access from a preliminarily registered terminal device among said plurality of terminal devices, comprising:

an identification information registration unit on which identification information for identifying a terminal device an access from which is to be rejected is registered;

detecting means for detecting identification information of a terminal device under accessing;

judging means for judging whether the identification information detected by said detecting means is included in received identification information or not, when identification information of a terminal device an access from which is to be rejected is received from the terminal device under accessing; and

means for, when said judging means judges that the identification information detected by said detecting means is included in the received identification information, notifying the terminal device under accessing of the same.

4. A network device, which is network-connected with a plurality of terminal devices and has a network filtering function for authorizing an access from a preliminarily registered terminal device among said plurality of terminal devices, comprising:

an identification information registration unit on which identification information for identifying a terminal device an access from which is to be authorized is registered;

detecting means for detecting identification information of a terminal device under accessing;

judging means for judging whether the identification information detected by said detecting means is included in received identification information or not, when identification information of a terminal device an access from which is to be authorized is received from the terminal device under accessing; and

means for, when said judging means judges that the identification information detected by said detecting means is not included in the received identification information, notifying the terminal device under accessing of the same.

5. A network device, which is network-connected with a plurality of terminal devices and has a network filtering function for rejecting an access from a preliminarily registered terminal device among said plurality of terminal devices, comprising:

an identification information registration unit on which identification information for identifying a terminal device an access from which is to be rejected is registered;

detecting means for detecting identification information of a terminal device under accessing;

judging means for judging whether the identification information detected by said detecting means is included in received identification information or not, when identification information of a terminal device an access from which is to be rejected is received from the terminal device under accessing; and

means for, when said judging means judges that the identification information detected by said detecting means is included in the received identification information, making a display state of the identification information detected by said detecting means on a display screen of the terminal device under accessing different from other identification information.

6. A network device, which is network-connected with a plurality of terminal devices and has a network filtering function for authorizing an access from a preliminarily registered terminal device among said plurality of terminal devices, comprising:

an identification information registration unit on which identification information for identifying a terminal device an access from which is to be authorized is registered;

detecting means for detecting identification information of a terminal device under accessing;

judging means for judging whether the identification information detected by said detecting means is included in received identification information or not, when identification information of a terminal device an access from which is to be authorized is received from the terminal device under accessing; and

means for, when said judging means judges that the identification information detected by said detecting means is not included in the received identification information, setting the identification information detected by said detecting means on a display screen of the terminal device under accessing as identification information to be registered.

7. A network device, which is network-connected with a plurality of terminal devices and has a network filtering function for rejecting an access from a preliminarily registered terminal device among said plurality of terminal devices, comprising:

an identification information registration unit on which identification information for identifying a terminal device an access from which is to be rejected is registered; and

a controller, coupled to said identification information registration unit, and capable of performing the following operations of;

detecting identification information of a terminal device under accessing;

judging whether the detected identification information is included in received identification information or not, when identification information of a terminal device an access from which is to be rejected is received from the terminal device under accessing; and

registering the received identification information on said identification information registration unit after excluding the detected identification information from the received identification information, when it is judged that the detected identification information is included in the received identification information.

8. A network device, which is network-connected with a plurality of terminal devices and has a network filtering function for authorizing an access from a preliminarily registered terminal device among said plurality of terminal devices, comprising:

an identification information registration unit on which identification information for identifying a terminal device an access from which is to be authorized is registered; and

a controller, coupled to said identification information registration unit, and capable of performing the following operations of;

detecting identification information of a terminal device under accessing;

judging whether the detected identification information is included in received identification information or not, when identification information of a terminal device an access from which is to be authorized is received from the terminal device under accessing; and

registering the received identification information on said identification information registration unit after adding the detected identification information to the received identification information, when it is judged that the detected identification information is not included in the received identification information.

9. A network device, which is network-connected with a plurality of terminal devices and has a network filtering function for rejecting an access from a preliminarily registered terminal device among said plurality of terminal devices, comprising:

an identification information registration unit on which identification information for identifying a terminal device an access from which is to be rejected is registered; and

a controller, coupled to said identification information registration unit, and capable of performing the following operations of;

detecting identification information of a terminal device under accessing;

judging whether the detected identification information is included in received identification information or not, when identification information of a terminal device an access from which is to be rejected is received from the terminal device under accessing; and

notifying the terminal device under accessing that the detected identification information is included in the received identification information, when it is judged so.

10. A network device, which is network-connected with a plurality of terminal devices and has a network filtering function for authorizing an access from a preliminarily registered terminal device among said plurality of terminal devices, comprising:

an identification information registration unit on which identification information for identifying a terminal device an access from which is to be authorized is registered; and

a controller, coupled to said identification information registration unit, and capable of performing the following operations of;

detecting identification information of a terminal device under accessing;

judging whether the detected identification information is included in received identification information or not, when identification information of a terminal device an access from which is to be authorized is received from the terminal device under accessing; and

notifying the terminal device under accessing that the detected identification information is not included in the received identification information, when it is judged so.

11. A network device, which is network-connected with a plurality of terminal devices and has a network filtering function for rejecting an access from a preliminarily registered terminal device among said plurality of terminal devices, comprising:

an identification information registration unit on which identification information for identifying a terminal device an access from which is to be rejected is registered; and

a controller, coupled to said identification information registration unit, and capable of performing the following operations of;

detecting identification information of a terminal device under accessing;

judging whether the detected identification information is included in received identification information or not, when identification information of a terminal device an access from which is to be rejected is received from the terminal device under accessing; and

making a display state of the detected identification information on a display screen of the terminal device under accessing different from other identification information, when it is judged that the detected identification information is included in the received identification information.

12. A network device, which is network-connected with a plurality of terminal devices and has a network filtering function for authorizing an access from a preliminarily registered terminal device among said plurality of terminal devices, comprising:

an identification information registration unit on which identification information for identifying a terminal device an access from which is to be authorized is registered; and

a controller, coupled to said identification information registration unit, and capable of performing the following operations of;

detecting identification information of a terminal device under accessing;

judging whether the detected identification information is included in received identification information or not, when identification information of a terminal device an access from which is to be authorized is received from the terminal device under accessing; and

setting the detected identification information on a display screen of the terminal device under accessing as identification information to be registered, when it is judged that the detected identification information is not included in the received identification information.