Re: [BUG] ? Strange behaviour since kernel 2.6.17 with a https website

From: Pete Harlan
Date: Fri Sep 29 2006 - 15:15:04 EST

On Fri, Sep 29, 2006 at 12:08:13PM +0200, Tchesmeli Serge wrote:
> Joerg Roedel wrote:
> > On Fri, Sep 29, 2006 at 11:47:20AM +0200, Tchesmeli Serge wrote:
> >
> >
> >> Me and a friend have discover a stange behaviour since kernel 2.6.17.
> >>
> >
> > Please try to switch off TCP window scaling using the command below
> > (as root) and retry.
> >
> > echo 0 > /proc/sys/net/ipv4/tcp_window_scaling
> >
> >
> Yes, it's work!

And for a less-intrusive workaround in 2.6.18, see this commit

commit 316c1592bea94ead75301cb764523661fbbcc1ca
Author: Stephen Hemminger <shemminger@xxxxxxxx>
Date: Tue Aug 22 00:06:11 2006 -0700

[TCP]: Limit window scaling if window is clamped.

This small change allows for easy per-route workarounds for broken hosts or
middleboxes that are not compliant with TCP standards for window scaling.
Rather than having to turn off window scaling globally. This patch allows
reducing or disabling window scaling if window clamp is present.

Example: Mark Lord reported a problem with 2.6.17 kernel being unable to

# ip route add via window 65535

Signed-off-by: Stephen Hemminger <shemminger@xxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>

Pete Harlan
ArtSelect, Inc.
ArtSelect is a subsidiary of a21, Inc.
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