Secure method and system to prevent external unauthorized...

Details Secure method and system to prevent external unauthorized... Secure method and system to prevent external unauthorized...

2006-07-25

2006-07-25

Pham, Brenda (Department: 2664)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C455S343200

Reexamination Certificate

active

07082129

ABSTRACT:
In a computer network including a plurality of interconnected computers, one of the computers being a sleeping computer in a power down state, the sleeping computer listening for a packet associated with the sleeping computer, a method and system of waking the sleeping computer from the computer network. An incoming packet of data is transmitted from one of the computers in the network to the sleeping computer. When the sleeping computer detects the incoming packet, it determines if the incoming packet contains a data sequence associated with the sleeping computer. Further, the sleeping computer compares a transit value in the incoming packet to a predetermined value stored at the sleeping computer. The transit value indicates how far the data packet has traveled through the network, indicating the approximate origin of the data packet. Knowing the approximate origin of the data packet allows the client system to identify if the data packet originated from an external network. The predetermined value represents an origin within the internal network. Accordingly, if the incoming packet matches the particular data sequence associated with the sleeping computer, and the transit value in the packet matches the predetermined value stored at the sleeping computer, then a signal is issued to wake the sleeping computer. Otherwise, the incoming packet is discarded and the sleeping computer is not awaken.

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D. Cromer, D. Desai, B. Gould, R. Johnson, R.D. Johnson, H. Locker and D. Rhoades, Definition of a Global Wake on Local Area Network Frame, IBM Technical Disclosure Bulletin, Dec. 1996, pp. 41-42, vol. 39, No. 12.

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