Method and system for denying cable modem access to a broadband network
A device, such as a cable modem or embedded media terminal adaptor that attempts to obtain unauthorized network services, is designated by head end equipment, such as a CMTS, as being a ‘rogue’ device. Upon a range request from the rogue device, the CMTS responds with a continuing range command. Upon receiving each periodic range request transmitted from the rogue device during a periodic station maintenance opportunity, the CMTS responds with another continuing range command. Thus, the rogue device does not ever establish connection with the CMTS because an ACK message is not received back from the CMTS.
1. A method for denying a user device access to bandwidth over a broadband network, comprising:
receiving a first ranging request message from a user device in response to a first ranging opportunity;
determining that the first ranging request message is from a rogue device;
transmitting a ranging continue message to the rogue device in response to the first ranging request from the rogue device;
preventing the rogue device from completing registration by transmitting subsequent ranging continue messages to the rogue device in response to any further responses by the rogue device to any subsequent ranging opportunities.
2. The method of claim 1 wherein the user device includes a cable modem.
3. The method of claim 1 wherein the user device includes an embedded media terminal adapter.
4. The method of claim 1 wherein the broadband network comprises a hybrid fiber coaxial network.
5. The method of claim 1 wherein the first ranging continue message comprises a RNG-RSP message having a status of ‘continue’.
6. The method of claim 1 wherein the first ranging opportunity comprises an initial broadcast ranging opportunity.
7. The method of claim 1 wherein the first ranging opportunity comprises a periodic ranging opportunity.
8. The method of claim 1 wherein determining that the first ranging request message is from a rogue device comprises:
maintaining data that can be used to identify whether a user device comprises at least one rogue device.
9. The method of claim 8 wherein the data that can be used to identify whether a user device comprises at least one rogue device comprises a media access control address.
10. The method of claim 1 wherein the broadband network comprises a DOCSIS broadband access network.
11. A method for denying a user device access to bandwidth service over a broadband network, comprising:
attempting to access unauthorized service;
receiving a first ranging opportunity specified by at least one bandwidth map;
transmitting a first ranging request message in response to the first ranging opportunity, wherein the first ranging request message is associated with receiving a first response message other than a first ranging continue message if the user device does not comprise a rogue device; and
receiving a first ranging continue message in response to the first ranging request transmitted during the first ranging opportunity; wherein ranging continue messages are transmitted to prevent rogue devices from completing registration and subsequent ranging continue messages are received by the user device in response to any further responses by the user device to any subsequent ranging opportunities.
12. The method of claim 11 wherein the first ranging opportunity comprises a periodic ranging opportunity.
13. The method of claim 12 further comprising:
receiving an initial broadcast ranging opportunity in at least one bandwidth map;
transmitting an initial ranging request message in response to the initial broadcast ranging opportunity, wherein the initial ranging request message is associated with an initial response message other than an initial ranging continue message if the user device does not comprise the rogue device; and
receiving the initial ranging continue message in response to the initial ranging request message.
14. A system for denying a user device access to bandwidth over a broadband network, comprising:
means for attempting to access unauthorized service;
means for maintaining data that identifies whether the means for attempting to access unauthorized service comprises a rogue user device;
means for providing the rogue user device a first ranging opportunity provided in at least one bandwidth map message;
means for transmitting a first ranging request during the first ranging opportunity provided in at least one bandwidth map message, wherein the first ranging request is associated with a first response message other than a first ranging continue message if the user device does not comprise the rogue user device; and
means for transmitting the first ranging continue message to the user device in response to the first ranging request received during the first ranging opportunity; and means for preventing the rogue device from completing registration by transmitting subsequent ranging continue messages to the rogue device in response to any further responses by the rogue device to any subsequent ranging opportunities.
15. The system of claim 14 wherein the user device includes a cable modem.
16. The system of claim 14 wherein the user device includes an embedded media terminal adapter.
17. The system of claim 14 wherein the broadband network comprises a hybrid fiber coaxial network.
18. The system of claim 14 wherein the first ranging continue message comprises a RNG-RSP message having a status of ‘continue’.
19. The system of claim 14 wherein the first ranging opportunity comprises a periodic ranging opportunity.
20. The method of claim 19 further comprising:
means for transmitting an initial broadcast ranging opportunity in at least one bandwidth map; and
means for transmitting an initial ranging request message in response to the initial broadcast ranging opportunity.