[Full-Disclosure] Proxies

From: Earl Keyser (Earl.Keyser_at_wayzata.k12.mn.us)
Date: 10/31/03

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    To: <full-disclosure@lists.netsys.com>
Date: Fri, 31 Oct 2003 11:20:16 -0600

    Help needed, please.

    We use all cisco networking gear. Currently using a cisco cache engine
    with SmartFilter to "manage" the surfing for our staff/students. As
    usual, the little devils figured a way to get around it.

    They went to Google, entered "open proxy list" and bingo-bango. From
    this list they found open proxies to use in IE.

    Besides suspending them, we made one technological change. Outgoing
    ports 8000, 8080, 8888 and 3128 are now blocked at the firewall.

    Can anyone suggest further refinements to reduce this kind of abuse? I
    know some proxies run on port 80, but I'll have to live with that.

    TIA

    Earl

    Earl Keyser, Network Specialist
    Wayzata Public Schools
    763-745-5105

    "Unix IS user-friendly. It's just picky about who its friends are."

    This outbound message has been scanned for viruses by ISD#284.

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