netdev - Re: IFB and iptables

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Date:	Tue, 31 May 2011 21:33:27 +0100
From:	Andrew Beverley <andy@...ybev.com>
To:	Jérôme Poulin <jeromepoulin@...il.com>
Cc:	netdev@...r.kernel.org
Subject: Re: IFB and iptables

On Wed, 2011-05-25 at 18:21 -0400, Jérôme Poulin wrote:
> Hi,
> 
> I'm trying to convert my IMQ based script to use the IFB device instead.
> Things appear to work quite right however the u32 classifier isn't
> aware of any connection tracking and I was wondering if it is at all
> possible to use match from iptables like layer7 when you use the IFB
> device?

It depends where you are attaching your IFB device. Unlike IMQ, IFB can
only be hooked on an interface (IMQ can be hooked between iptables
chains). Therefore, if you are doing it on the ingress interface,
traffic will not have been connection-tracked. Off the top of my head,
it should work on egress though.

Andy


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