Another Windows XP bug
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Thread: Another Windows XP bug

  1. #1
    AntiOnline Senior Member
    Join Date
    Oct 2001

    Another Windows XP bug

    Windows XP Can Kill DSL Connections

    It seems that Windows XP has a nasty tendency to cause DSL servers to identify people using that operating system as having an illegal connection, and shut them out.

    The problem lies with the MTU (Maximum Transmission Unit) which, for people using PPPoE (Point-to-Point Protocol over Ethernet) on ADSL, should never be more than 1492. By default, Win XP sets it to 1500.

    Microsoft knows about the problem, but offers no patch for XP. Their only solution is recommending customers to hack their registries.

    *my comments*

    M$ is offering no patch? Aren't MS products supposed to be easy to use? How can an average person hack their registry? Thats not happening.

    *end my comments*

    My sources cited:


    The Register
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  2. #2
    AntiOnline Senior Medicine Man
    Join Date
    Nov 2001
    Its the same story as always with Microsoft...they have a bug, and they deny it...Until you call tech support and pay a heft price ...then they give you the patch...

    This reminds me of the Win Me/LT Winmodem bug.

    When will society rise up against this monster?
    It is better to be HATED for who you are, than LOVED for who you are NOT.

    THC/IP Version 4.2

  3. #3
    Priapistic Monk KorpDeath's Avatar
    Join Date
    Dec 2001
    Mankind have a great aversion to intellectual labor; but even supposing knowledge to be easily attainable, more people would be content to be ignorant than would take even a little trouble to acquire it.
    - Samuel Johnson

  4. #4
    Join Date
    Aug 2001
    The first thing I do whenever I have to reinstall my dsl-line, is take this TweakTest.

    And this tool allows you to adjust your MTU... safes me the trouble of going through my reg.

  5. #5
    Senior Member
    Join Date
    Sep 2001
    Is this always supposed to happen with every XP install? I have been running Win XP Pro for about a month and it hasn't caused any trouble with or DSL connection.
    [gloworange]\"A hacker is someone who has a passion for technology, someone who is possessed by a desire to figure out how things work.\" [/gloworange]

  6. #6
    Senior Member
    Join Date
    Sep 2001
    the "illegal" connection part must be some type of AUP on the ISP side that says "No, you can NOT network". Because by default windows XP has a 1500 MTU setting (matching that of an ethernet network). PPPoE going across a standard AAL5 ATM network has an optimal MTU of 1456(?) I believe? If ISPs are checking the MTU to enforce thier AUP then they are quite stupid, (considering most OSs have a default MTU of 1500, including LINUX I do believe?) a better way to enforce the no networking policy would be to check the RADIUS (check your RFCs) to see if the customer has authenicated more than once.

    Just a thought!

    -- Do not dwell in the past, do not dream of the future, concentrate the mind on the present moment--

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