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Network adapter firewall system and method

  • US 8,185,943 B1
  • Filed: 12/20/2001
  • Issued: 05/22/2012
  • Est. Priority Date: 12/20/2001
  • Status: Active Grant
First Claim
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1. A network adapter, comprising:

  • a plurality of designated trusted and untrusted ports; and

    a processor provisioned in the network adapter, configured for providing firewall capabilities, and coupled within a computer, the network adapter coupled to a network via the ports, wherein network traffic from the trusted ports bypasses the processor, wherein the network adapter processor is configured for;

    assembling the network traffic into packets, wherein a subset of the packets greater than a threshold for a maximum size of packets are stored in random access memory of the computer;

    performing an initial determination whether certain assembled incoming packets are of interest for screening activities based on, at least, determining a source of the certain assembled incoming packets, a protocol of the certain assembled incoming packets, a timing of the certain assembled incoming packets and content within the certain assembled incoming packets;

    determining whether the certain assembled incoming packets of interest violate a plurality of predetermined rules for packet transmissions;

    denying access to certain areas of the computer based on a violation of the predetermined rules, wherein the violation is associated with remote access to the computer using an authentication certificate;

    granting access to the certain areas of the computer if no violation occurs; and

    communicating an alert that signals the violation, wherein the alert is provided using an indicator on the network adapter and the alert includes a plurality of options for addressing the violation.

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