Linux Netfilter discussions
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From: Pascal Hambourg <pascal.mail@plouf.fr.eu.org>
To: netfilter@vger.kernel.org
Subject: Re: Port-based routing with OpenVPN
Date: Wed, 26 Sep 2007 16:10:06 +0200	[thread overview]
Message-ID: <46FA683E.5030307@plouf.fr.eu.org> (raw)
In-Reply-To: <1190810998.6867.5.camel@laptop>

Mario Hülsegge a écrit :
> 
> these 2 hints solved the problem, now all runs fine. i inserted a masq
> rule before, but without setting rp_filter

The kernel disables rp_filter by default, but the startup scripts 
provided by some distributions enable it.

> (who would ever thought of THAT ;) ).

The practical answer is : anyone who experienced the problem once does. 
Trust me.

The theoretical answer is : anyone using iproute should, because it is a 
common issue documented in the Linux Advanced Routing & Traffic Control 
HOWTO, and probably elsewhere. I myself hesitated to mention it and did 
it only for completeness because it could not be the only cause of your 
problem : tcpdump would have seen the replies even though the kernel had 
dropped them.

      reply	other threads:[~2007-09-26 14:10 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-09-15 23:15 (unknown) "Mario Hülsegge"
2007-09-16 11:05 ` Port-based routing with OpenVPN Pascal Hambourg
2007-09-19 21:38   ` Mario Hülsegge
2007-09-25 22:14   ` Mario Hülsegge
2007-09-26 10:33     ` Pascal Hambourg
2007-09-26 12:49       ` Mario Hülsegge
2007-09-26 14:10         ` Pascal Hambourg [this message]

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