Re: TCP: Treason uncloaked DoS ??

From: Zan Lynx
Date: Wed Feb 18 2004 - 09:37:07 EST


On Wed, 2004-02-18 at 03:55, Chris Wedgwood wrote:
> On Wed, Feb 18, 2004 at 11:27:25AM +0100, Klaus Ethgen wrote:
>
> > Well I have the same every night when my backup on the local host is
> > running. Many of the "kernel: TCP: Treason uncloaked! Peer
> > 192.168.17.2:2988/33016 shrinks window 3035402428:3035418812. Repaired."
>
> > But 192.168.17.2 is the same host! So the buggy TCP stack seams to
> > be in linux kernel.
>
> My guess is there is a PacketShaper in between mangling things.

I have seen this same Treason uncloaked! error message between two of my
Linux systems recently, while running rsync backups between them. One
system is 2.4.21, the other 2.6.2. I was not using any shaping.

I was trying to figure it out, but I cannot reproduce it reliably, it
seems to just happen.
--
Zan Lynx <zlynx@xxxxxxx>

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