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    SubjectRe: Linux 2.4.27 SECURITY BUG - TCP Local and REMOTE(verified) Denial of Service Attack
    On Tue, 21 Sep 2004 20:32:12 +0200
    Florian Weimer <> wrote:

    > > But then you get PMTU problems...
    > PMTU discovery is not an issue because it's turned off anyway, at
    > least by default.

    It's on by default, for both TCP and UDP in the kernel,
    and has been so for a long time.

    Why would it be off by default?

    If you disable PMTU discovery, say goodbye to TCP
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