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    SubjectRe: Linux 2.2.16 through 2.2.18preX TCP hang bug triggered by rsync
    On Wed, Jan 24, 2001 at 11:03:34PM +0300, wrote:
    > Hello!
    > > I read through the tcpdump, and it seems that Linux completely ignores
    > > packets with out-of-window sequence numbers:
    > Yes, Linux is __very__ not right doing this. RFC requires to accept
    > ACK, URG and RST on any segment adjacent to window, even if window
    > is zero.

    It's mostly for security to make it more difficult to nuke connections
    without knowing the sequence number.

    Remember RFC is from a very different internet with much less DoS attacks.

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