Date: Wed, 13 Dec 2006 18:12:47 -0600
To: Dieter Ferdinand <dieter.ferdinand@gmx.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: server don't accept ip-connections from linux
Message-ID: <20061214001247.GA26676@artselect.com>
References: <457FD55E.13765.202391D@dieter.ferdinand.gmx.de>
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From: Pete Harlan <harlan@artselect.com>
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On Wed, Dec 13, 2006 at 10:26:38AM +0000, Dieter Ferdinand wrote:
> i don't know, what is the difference of the tcp-packets from windows/kernel 
> 2.2 and linux with kernel 2.4. but with kernel 2.4 i have trouble with some 
> servers.
> 
> i check the packets with an analyser and make some test. if i disable ecn 
> with "echo 0x0 > /proc/sys/net/ipv4/tcp_ecn" it works, with ecn enabled, it 
> don't work.

With kernel 2.6.17.13 or higher, you can limit the scaling factor for
that broken host with:

	THEIR_IP=1.2.3.4
	MY_GATEWAY=5.6.7.8

	ip route add $THEIR_IP/32 via $MY_GATEWAY window 65535

which limits window scaling for that destination without interfering
with your other connections.

--Pete
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