Apparatus for filtering server responses

  • US 7,849,507 B1
  • Filed: 04/30/2007
  • Issued: 12/07/2010
  • Est. Priority Date: 04/29/2006
  • Status: Active Grant
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First Claim
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1. A data processing apparatus, comprising:

  • at least one processor;

    a first network interface coupled to the processor and configured to be coupled to a protected network;

    a second network interface coupled to the processor and configured to be coupled to an external network;

    a core hypertext transfer protocol (HTTP) proxy coupled to the processor and coupled to a content cache, wherein the HTTP proxy is configured to receive an HTTP request from a client computer in the protected network, send the request to a network resource in the external network on behalf of the client computer, and receive an HTTP response from the network resource on behalf of the client computer;

    a plurality of spyware scanning engines (SSEs), wherein each of the SSEs is coupled to stored content signatures, and wherein each of the SSEs is configured to detect a particular kind of malicious software in the HTTP response;

    logic comprising one or more sequences of instructions which when executed cause the at least one processor to perform;

    scanning the HTTP response and determining two or more types of content in the HTTP response;

    based on the types of content in the HTTP response, selecting two or more of the SSEs for use in further evaluation of the HTTP response;

    providing a reference to the HTTP response to the selected two or more SSEs.

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