Unfortunately the other machine is my ISP, who I do not control. I have
no idea what the sender OS is, but it's obviously not a standard recent
Linux judging from the lack of SACK.
> Also, please, send full (binary!) tcpdump from SYN and to FIN.
I have send myself a 30k mail and produced a trace of receiving it. A
binary trace with "tcpdump -n -w" is attached, and a text version of it
with "tcpdump -r pktlog2" is appended below.
> Well, and if sender is not linux... no ideas.
I am wondering if not sending so many duplicate ACKs would help the
broken sender (I know, that is against RFC793 but hey if it works...).
For the sake of a Linux test, I shall try proxying this stream via a
Linux 2.4.2 box I have on the net, and see if it is an improvement.
-- Jamie
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