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    SubjectRe: Linux 2.4.27 SECURITY BUG - TCP Local and REMOTE(verified) Denial of Service Attack
    On Mon, Sep 13, 2004 at 04:30:36AM +0100, Paul Jakma wrote:

    > More specifically, BGP should have treated TCP resets as a transient
    > error, to be expected (indeed, they /cant/ be a sign that a link is
    > down - if you can receive a RST the link or path is patently quite
    > ok).

    The application level does not always distinguish between TCP RST and
    error generated by the local system because of a "network unreachable"
    due to a link down and a lost route.

    > The BGP state machine should instead, in normal operation, have
    > only treated Hold time expired as the definitive sign of "peer is
    > down" and allowed reconnects.

    It should not necessarily wait for the time-out, but at least wait for
    a few reconnect errors.


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