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Re: [libvirt] [PATCH 2/2] add MAC address based port filtering to qemu



On Wed, 2009-11-18 at 17:10 +0100, Gerhard Stenzel wrote:
> On Wed, 2009-11-04 at 12:55 +0000, Daniel P. Berrange wrote:
> ...
> > 
> > Mark  pointed  out to me offlist, that this filtering is a little too
> > restrictive because it also blocks multicast + broadcast packets. We
> > can fix that easily enough with an extra patch though, and a single
> > catch-all rule for multi/broad-cast packets.
> > 
> > Daniel
> Hi,
> I have revisited this subject and was trying to find a scenario, where
> multi/broad-cast packets would be affected by this patch and failed so
> far.
> Since only the source mac address of a guest is filtered, I don't see
> how a multicast or broadcast destination mac address could be a problem.
> 
> What am I missing?

Ah, that makes sense, thanks.

I hadn't looked closely enough to notice that you're only doing source
mac address filtering.

Cheers,
Mark.


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