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Date: Wed, 13 Dec 2000 19:11:41 -0800
Message-Id: <200012140311.TAA02688@pizda.ninka.net>
From: "David S. Miller" <davem@redhat.com>
To: pivo@pobox.sk
CC: linux-kernel@vger.kernel.org
In-Reply-To: <20001214041109.A997@ivan.doma> (message from Ivan Vadovic on
	Thu, 14 Dec 2000 04:11:09 +0100)
Subject: Re: IP ID == 0 ?!
In-Reply-To: <20001214041109.A997@ivan.doma>
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   Date: 	Thu, 14 Dec 2000 04:11:09 +0100
   From: Ivan Vadovic <pivo@pobox.sk>

   I've been having weird problems with 2.4 kernels ip networking. I
   can't connect to several sites ( hotmail.com,intel.com... ). After
   some investigation with tcpdump I figured that the IDentification
   field of every outgoing ip packet is set to zero and then it
   doesn't get through some few firewalls. I'm surprised I haven't
   found anything about it in the list archives, so I'm trying to get
   help here. Did I forget to configure something?

No, the sites have firewalls erroneously blocking ECN, try:

echo "0" >/proc/sys/net/ipv4/tcp_ecn

Later,
David S. Miller
davem@redhat.com
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