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From: Ryan Russell (ryansecurityfocus.com)
Date: Thu Mar 15 2001 - 12:08:02 CST

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    On Wed, 14 Mar 2001, Phil Wood wrote:

    > Around 32% of all alerts for today fall in to the port 53 to 137. I know for
    > a fact that the destination hosts (in our address space) are not sending packets
    > from 137 to 53.

    That's most likely NT DNS servers falling back to NetBIOS trying to look
    up names.

                                            Ryan

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