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Systems and methods to detect and respond to distributed denial of service (DDoS) attacks

  • US 8,869,275 B2
  • Filed: 11/28/2012
  • Issued: 10/21/2014
  • Est. Priority Date: 11/28/2012
  • Status: Active Grant
First Claim
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1. A computer-implemented method for mitigating a distributed denial of service (DDoS) attack, comprising:

  • receiving, by a server, a response message from an application server;

    determining a source internet protocol (IP) address corresponding to a source client based on a request message received from the source client, wherein the request message received from the source client corresponds to the response message received from the application server;

    identifying, by the server, a plurality of counters corresponding to the source IP address, wherein the plurality of counters includes a consecutive bad request counter (CBRC) that is used to track a number of consecutive bad requests received from the source IP address;

    identifying, by the server, a response type of the response message; and

    causing a value of at least one of the plurality of counters to change based on the response message and the response type.

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