From: Mike N. 

On Tue, 1 Aug 2006 23:24:33 -0400, "Geo"  wrote:

>I wonder. All traffic going into the location where the news server is
>passes thru a packetshaper. I wonder if window scaling and the packet shaper
>are interacting?

   This is quite likely - Packeteer for example did not add support to
their system for Window Scaling until 2000 (version 4.1), despite Window
Scaling having been in the RFC's since 1992.

  The symptoms we see fit the scenario where the Linux end uses a Window
Scale of 7, but something converts it to 0 or 1 before it reaches the other
end.   Linux starts the connection by advertising a small buffer size
(something like 5K).   If the other end doesn't have the scaling factor of
2^7(128) to apply, it only sees a window buffer size of 46 bytes.   This
leaves a  payload of 1 byte which would explain the switch to 1-byte packets.

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