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    SubjectRe: Linux TCP problem while talking to ?
       From: Meelis Roos <>
    Date: Mon, 12 Aug 2002 10:28:10 +0300 (EEST)

    Before and after the connetion attempt - looks like the number of bad
    segments is increasing so probably not a TCP bug.

    Since I can connect to this server fine from different locations, it
    looks like something (ISP caches/shapers? cable modem?) is corrupting
    specific packets in a reproducible way.

    Aparently something is wrong with the checksums.
    InErrs gets incremented in three cases:

    1) Header too small, unlikely what you see

    2) Bad SYN sequences, Abort On Syn in TcpExt would have been
    incremented also if this were the case, it was not

    3) Bad TCP checksum

    Hmmm, do you have messages that say "hw tcp v4 csum failed"
    in your kernel logs? Any other interesting kernel messages?
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