RE: Arpwatch

From: J. Oquendo (
Date: 09/11/03

  • Next message: Halverson, Chris: "FW: Windows Server 2003"
    Date: Wed, 10 Sep 2003 23:19:20 -0400

    From the secfocus write up... Arpwatch monitors ethernet activity
    and keeps a database of ethernet/ip address pairings. It also
    reports certain changes via email.

    This should have been self explanatory enough.

    If you were unsure what it was and what it does, then why
    would you bother downloading and installing it? Now I don't
    mean to rattle you up, nor flame, nor cause commotion, but
    at times I become curious to know why some use things
    without knowing what it does. Wouldn't it have made more
    sense to you to find out what it was you needed to do,
    then look for something useful based on that information?

    Think about this for a quick second. I notice that many
    are quick to rush into downloading something to use never
    taking the time to understand the background of it all.
    Now suppose you saw something that said arpkeep. Would
    you quickly rush to download gcc the file without fully
    understanding what it does? Suppose it was a backdoor?

    Oh well my rant for the month sorry if I offended anyone
    but sometimes it's always good to see a reminder and
    considering this is technically a security list, I
    thought it would be appropriate to edumacate some who
    were new on the list or the scene like moi.

    I have recently installed arpwatch on one of our servers. I understood
    arpwatch "learns" arp replies, but since arp replies are destined to a
    specific MAC and
    this is a switched network, how can arpwatch see all arp replies ?

    exec `echo ajbqghuf|rot13|sed '/\n/!G;s/\(.\)\(.*\n\)/&\2\1/;//D;s/.//'`

    Jesus Oquendo
    sil @ disgraced . org
    sil @ antioffline . com

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