Method, a Device, and a System for Protecting a Server Against Denial of DNS Service Attacks
First Claim
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1. A method of protecting a server (10, 18) against denial of DNS service attacks, comprising:
- detecting (100, 102, 104) denial of DNS service attacks targeting the server; and
intercepting (110) data packets addressed to the server;
the method being characterized by interrupting (116) the transmission of an intercepted data packet to the server if the intercepted packet has a transaction number that is not in a list of transaction numbers of requests sent by the server.
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Abstract
The invention relates to a method of protecting a server (10, 18) against denial of DNS service attacks wherein denial of DNS service attacks targeting the server are detected (100, 102, 104) and data packets addressed to the server are intercepted (110). The transmission of an intercepted data packet to the server is interrupted (116) if the intercepted packet has a transaction number that is not in a list of transaction numbers of requests sent by the server.
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8 Claims
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1. A method of protecting a server (10, 18) against denial of DNS service attacks, comprising:
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detecting (100, 102, 104) denial of DNS service attacks targeting the server; and
intercepting (110) data packets addressed to the server;
the method being characterized by interrupting (116) the transmission of an intercepted data packet to the server if the intercepted packet has a transaction number that is not in a list of transaction numbers of requests sent by the server. - View Dependent Claims (2, 3)
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- 4. A device (16, 22, 30, 40) for protecting a server (10, 18) against denial of DNS service attacks including means for intercepting data packets addressed to the server, characterized in that it further includes means for interrupting transmission of an intercepted data packet to the server if the intercepted packet has a transaction number that is not in a list of transaction numbers of requests sent by the server.
Specification