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SubjectRe: 2.6.7-mm1 - 2.6.7-mm4 weird http behavior
On Tue, 29 Jun 2004 13:35:01 -0700
Stephen Hemminger <shemminger@osdl.org> wrote:

> FYI - gentoo works for window scale 0..2 and appears to fail for >3.
>
> Also, the socket ends up with:
>
> State Recv-Q Send-Q Local Address:Port Peer Address:Port
> ESTAB 0 0 172.20.1.73:34452 198.63.211.232:http
> ts sack wscale:0,3 rto:332 rtt:66.375/50.5 cwnd:3

Yes, I've seen this declared in other reports too.

It probably means just that for window scales of 0..2 the misinterpretation
does not result in a too-small-to-send-data window.

But I'm still confused that the scaled window is being given to the
receiver, and this makes the connection freeze. I wonder if there is
a queer box doing NAT or similar in front of the gentoo machine which
either:

1) Applies any window scaling to both directions
2) Applies window scaling to the wrong direction

and uses this to "help" with dropping of out-of-window TCP segments.
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