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Re: strange behaviour

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Subject: Re: strange behaviour
From: angico <angico@yahoo.com>
Date: Mon, 26 Feb 2007 08:21:33 -0800 (PST)
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GREAT, GUYS! IT WORKED!!!!!! I THANK YOU VERY MUCH for the help!
angico.


----- Original Message ----
From: Cedric Blancher <blancher@cartel-securite.fr>
To: angico <angico@yahoo.com>
Cc: netfilter@lists.netfilter.org
Sent: Monday, February 26, 2007 1:07:55 PM
Subject: Re: strange behaviour

Le lundi 26 février 2007 à 07:35 -0800, angico a écrit :
> hi, buddys. thanks for your attention, but...
> nothing works, yet. and this option "--clamp-mss-to-pmtu" just send me an 
> error: "iptables: Invalid argument". 
> angico.

My mistake.
As Pascal stated, you have to specify a "-p tcp --tcp-flags SYN,RST SYN"
as well, as TCPMSS clamping only works on TCP packets with SYN flag set:

        iptables -t mangle -A FORWARD -o ppp0 -p tcp \
           --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu

It should work better.


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