×

System and method for preventing a first node from being emulated by another node

  • US 6,151,679 A
  • Filed: 01/21/1998
  • Issued: 11/21/2000
  • Est. Priority Date: 09/18/1995
  • Status: Expired due to Fees
First Claim
Patent Images

1. A network security device configured to receive communications from a node to be secured and pass the received communications to a network, and configured to be connected between the node to be secured and the network, the node to be secured having a first network address and the security device having the same network address as the node to be secured, the security device comprising:

  • (a) a permanent memory whose contents cannot be changed, and configured to store the first network address;

    (b) a processor configured to;

    (i) receive a communication from said node;

    (ii) compare a network address in the received communication with the first network address stored in the permanent memory; and

    (iii) not pass the communication to the network if the network address in the received communication is not the same as the first network address stored in the permanent memory.

View all claims
  • 9 Assignments
Timeline View
Assignment View
    ×
    ×