SSH/SCP hangs on NT4SP6, sshd says broken pipe after sent adjust

[Wolfgang Spraul]

my server: NT4 SP6, latest Cygwin, sshd through srvany.exe
my client: RedHat 7, scp

Copying small files (14 KB in my example) works fine, but copying larger files
always hangs my Cygwin SSHD service.

The last few lines in the sshd -d -d -d log say

debug2: callback done
debug2: channel 0: read 3014 from efd 10
debug2: channel 0: window 16359 sent adjust 16409
Broken pipe

The client says (scp -v)

file_20mb 0% 0 --:-- ETA
Read from remote host xxx: Connection reset by peer
Exit status -1
lost connection

------------
Any ideas? Why does sshd adjust the window size? Could it be textmode/binmode
related?
Again, a small file (14KB) goes through smoothly, and I also have the same
Cygwin sshd working fine on a W2K box.
Regards,
Wolfgang

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