From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joris <joriske@gmail.com>
Subject: clampmss only partially working on 2.6 kernelmode pppoe?
Date: Sat, 12 Feb 2005 07:41:40 +0100
Message-ID: <afcf620205021122413dd5dd6d@mail.gmail.com>
Reply-To: Joris <joriske@gmail.com>
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
List-Id: <netfilter.vger.kernel.org>
List-Unsubscribe: <https://lists.netfilter.org/mailman/listinfo/netfilter>,
	<mailto:netfilter-request@lists.netfilter.org?subject=unsubscribe>
List-Archive: </pipermail/netfilter>
List-Post: <mailto:netfilter@lists.netfilter.org>
List-Help: <mailto:netfilter-request@lists.netfilter.org?subject=help>
List-Subscribe: <https://lists.netfilter.org/mailman/listinfo/netfilter>,
	<mailto:netfilter-request@lists.netfilter.org?subject=subscribe>
Sender: netfilter-bounces@lists.netfilter.org
Errors-To: netfilter-bounces@lists.netfilter.org
Content-Type: text/plain; charset="us-ascii"
To: netfilter@lists.netfilter.org

Hi,


I have linux 2.6.11-rc2 masquerading a pppoe connection (mtu: 1492)
trough the kernel mode pppoe implementation.

I loaded the ipt_tcpmss and ipt_TCPMSS (what's the difference?) kernel
modules, and have the following iptables rule running:
iptables -I FORWARD -o ppp0 -p tcp --tcp-flags SYN,RST SYN -j TCPMSS 
--clamp-mss-to-pmtu

Most internet hosts seem to be ok, but (don't laugh, it's for a family
member's fade-out only!) hotmail still is a pita. (to be specific:
after logging in, the inbox page served by
by18fd.bay18.hotmail.msn.com never gets trough). Some hotmail submit


Has someone experienced something similar?

Is there a more precise test method (eg, sending a packet of a certain
size to a certain host or something, or is there something specific I
could look for in a network dump?)

Any suggestions on how this could work?