Two comments that stand out in reference to the efficacy of air-gap products are: 1) A firewall is a tunnel, an air gap is a tunnel. And a tunnel is a tunnel is a tunnel. Giving it another name doesn't mean it isn't the same. 2) Roger Marquis said so poignantly: A half-duplex datastream with pico-second turnaround, coupled with a micrometer gap between two fiber connectors doesn't make a product anymore or less secure than other firewalls. - Ben Rothke (ben.rothke[at]

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