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

Gerhard Stenzel gstenzel at linux.vnet.ibm.com
Wed Nov 18 16:10:38 UTC 2009

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
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
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?

Best regards, 

Gerhard Stenzel, 
IBM Deutschland Research & Development GmbH
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