From: Martijn Lievaart <m@rtij.nl>
To: oscar@linnea.net
Cc: netfilter@vger.kernel.org
Subject: Re: interfaces in /proc/net/ip_conntrack
Date: Tue, 11 Dec 2007 00:36:06 +0100 [thread overview]
Message-ID: <475DCD66.5080102@rtij.nl> (raw)
In-Reply-To: <26618.83.227.11.237.1197308966.squirrel@mh.linnea.com>
Oscar N wrote:
> Are the interfaces saved in any way in a session or is it only ip src, dst
> and ports that are saved and matched against?
>
> Why I ask is because what happens if I configure a linuxbox as two virtual
> firewall with same nets being used on different vlans. Will all the
> sessions be separate or will they sometimes "merge" if it happens to be
> the same IPs and ports in two sessions.
>
Interfaces are not used, not in this sense. In fact, this is a feature.
It allows asymetric routing, where packets go out through one interface
and the return packets arrive at a different interface.
I would use two physical or virtual machines, as the risk you describe
is real, if remote.
HTH,
M4
next prev parent reply other threads:[~2007-12-10 23:36 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-10 17:49 interfaces in /proc/net/ip_conntrack Oscar N
2007-12-10 19:26 ` Pascal Hambourg
2007-12-10 23:36 ` Martijn Lievaart [this message]
2007-12-11 8:03 ` Oscar N
2007-12-11 10:03 ` Martijn Lievaart
2007-12-11 11:03 ` Pascal Hambourg
2007-12-11 11:36 ` Benny Amorsen
2007-12-11 12:49 ` Oscar N
2007-12-11 17:46 ` Martijn Lievaart
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