On Mon, Aug 11, 2014 at 5:38 PM, Anton Gorlov <stalker(a)altlinux.ru&gt; wrote: Libvirt manages iptables, ebtables, etc via nwfilter. You can add a filterref to your guest xml. This libvirt documentation covers this topic <http://Libvirt manages iptables, ebtables, etc via nwfilter. You can add a filterref to your guest xml. This article covers>. It sounds like you will want to implement the clean-traffic filter. this reference which sounds like what you want to implement. "Most of these are just building blocks. The interesting one here is 'clean-traffic'. This pulls together all the building blocks into one filter that you can then associate with a guest NIC. This stops the most common bad things a guest might try, IP spoofing, arp spoofing and MAC spoofing." Regards, Jamie Ian Fargen