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Date: Wed, 7 Jul 2004 01:01:47 +0200
From: bert hubert <ahu@ds9a.nl>
To: "David S. Miller" <davem@redhat.com>
Cc: Stephen Hemminger <shemminger@osdl.org>, jamie@shareable.org,
        netdev@oss.sgi.com, linux-net@vger.kernel.org,
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Subject: PLS help fix: recent 2.6.7 won't connect to anything Re: [PATCH] fix tcp_default_win_scale.
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On Tue, Jul 06, 2004 at 01:35:59PM -0700, David S. Miller wrote:

> Therefore we do not know which of the following two it really is:

Anybody with this problem is kindly invited to try to connect to
213.244.168.210, port 10000, http://213.244.168.210:10000/ should work.

If you have a problem, email me with your IP address, I have a tcpdump
running.

> 1) window scale option being stripped from SYN+ACK

The remote is in fact zeus-pub.kernel.org. I assume it does not have a
broken firewall, and I sure haven't, and it sends out to me:

00:46:31.936667 192.168.1.4.34018 > 204.152.189.116.80: S 2786942165:2786942165(0) win 5840 
	<mss 1460,sackOK,timestamp 269093190,nop,wscale 7> (DF)

00:46:32.097745 204.152.189.116.80 > 192.168.1.4.34018: S 2888442437:2888442437(0) 
	ack 2786942166 win 5792 <mss 1460,sackOK,timestamp 3563902477 26909319,nop,wscale 0> (DF)
	                                                                                  ^
00:46:32.098170 192.168.1.4.34018 > 204.152.189.116.80: . ack 1 win 45 
	<nop,nop,timestamp 26909481 3563902477> (DF)

So I would rule out 1), as this is a network that does not have the problem. 

> 2) non-zero window option being patched into a zero window
>    scale option

This looks more likely, on the outgoing SYN. We'll know tomorrow evening
(CEST) or earlier if somebody with the problem volunteers.

Regards,

bert

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