Address restriction method, address restriction program, and address restriction apparatus

• US 20040148412A1
• Filed: 12/08/2003
• Published: 07/29/2004
• Est. Priority Date: 01/07/2003
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Itoh, Fumiaki, Kitawaki, Haruyuki
• Granted Patent: US 7,512,709 B2
• Time in Patent Office: Days
• US Class Current: 709/229
• CPC Class Codes: H04L 2101/604 Address structures or formats
• CPC Class Codes: H04L 61/5046 Resolving address allocation conflicts; Testing of addresses testing when self-assigning an address H04L61/5092

Abstract

A router obtains a network address generated by a PC connected to a LAN, and the identification data (MAC address) unique to the PC. When the obtained network address does not match the network address (EUI-64) generated from the obtained identification data unique to the PC according to a predetermined rule, the router sends a collision message.

Claims

1. An address restriction method comprising the steps of:

obtaining an address generated by an apparatus connected to a network and identification data unique to the apparatus;

determining whether the obtained address has been generated from the obtained identification data unique to the apparatus; and

sending a message forbidding the use of the obtained address according to the result of the determining step.

2. An address restriction method according to claim 1, wherein said determining step determines whether the obtained address includes predetermined data.

3. An address restriction method according to claim 1, wherein said obtaining step obtains a MAC address of a network interface provided for the apparatus, as the identification data unique to the apparatus.

4. An address restriction method according to claim 1, wherein said sending step sends a message indicating that the obtained address has a collision.

5. An address restriction program comprising the steps of:

obtaining an address generated by an apparatus connected to a network and identification data unique to the apparatus;

determining whether the obtained address has been generated from the obtained identification data unique to the apparatus; and

sending a message forbidding the use of the obtained address according to the result of the determining step.

6. An address restriction program according to claim 5, wherein said determining step determines whether the obtained address includes predetermined data.

7. An address restriction program according to claim 5, wherein said obtaining step obtains a MAC address of a network interface provided for the apparatus, as the identification data unique to the apparatus.

8. An address restriction program according to claim 5, wherein said sending step sends a message indicating that the obtained address has a collision.

9. An address restriction apparatus comprising:

connection means for connecting to a network and for obtaining an address generated by a device connected to the network and identification data unique to the device; and

determination means for determining whether the obtained address has been generated from the obtained identification data unique to the device;

wherein, said connection means sends a message forbidding the use of the obtained address according to the result of the determination means.

10. An address restriction apparatus according to claim 9, wherein said determination means determines whether the obtained address includes predetermined data.

11. An address restriction apparatus according to claim 9, wherein said connection means obtains a MAC address of a network interface provided for the device, as the identification data unique to the device.

12. An address restriction apparatus according to claim 9, wherein said connection means sends a message indicating that the obtained address has a collision.

13. An address restriction apparatus according to claim 9, wherein said determination means performs a first determination of whether the obtained address has been generated from the obtained identification data unique to the device and a second determination of whether the obtained address matches an address of the connection means;

and

said connection means sends the message forbidding the use of the obtained address according to the result of the first determination and the result of the second determination.