Re: (ICMP attacks against TCP) (was Re: HPSBUX01137 SSRT5954

Casper.Dik_at_Sun.COM
Date: 07/21/05

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    To: Darren Reed <avalon@caligula.anu.edu.au>
Date: Thu, 21 Jul 2005 19:17:15 +0200

    >> There are still some radio links with MTUs of 296 bytes.
    >
    >Go search with google....people still actively use smaller MTUs.
    >
    >What do you do? Where do you draw the line in the sand?

    Well, the minimum requirement for "you must be able to reassemble this"
    is 576; so you use PMTU until you go as low as 576 at which point you
    stop using the DF bit.

    Casper

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