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Source reputation information system with router-level filtering of electronic messages

  • US 8,001,268 B2
  • Filed: 03/22/2007
  • Issued: 08/16/2011
  • Est. Priority Date: 05/25/2004
  • Status: Active Grant
First Claim
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1. A network traffic filtering system for filtering a flow of electronic messages across a computer network interconnected with a plurality of routers configured to route electronic message packets to destination servers, the system comprising:

  • a server installed on one or more computing devices and external to a destination server targeted to receive an electronic message from a message source and any gateway to a network having such a targeted destination server;

    an engine, installed on the server, for executing instructions stored in a memory, the execution of the instructions configured to evaluate reputation data for sources of incoming messages to identify potentially threatening message sources based on the reputation data associated with the sources, the reputation data based on monitoring prior messages after being sent from sending servers associated with a source and before being received by a targeted destination server or at a gateway to a local network having a targeted destination server;

    a profile database connected to the server and associated with the engine for storing the identified sources, the profile database also external to any gateway to a local network having a targeted destination server; and

    wherein the engine is further configured to provide connection data based on the identified potentially threatening sources to one or more routers associated with a targeted destination server for updating routing tables corresponding to the one or more routers, the connection data preventing identified threatening sources from successfully sending electronic messages to the targeted destination server via the one or more routers.

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