[libvirt-users] Allowing incoming traffic to a virtual network

Hello! I have some virtual networks defined on a virtualization host (using libvirt 0.7.7 and kvm 0.12.3) with some virtual bridges (virbr1, virbr2) which are all plugged into a phisical bridge br0. Now I would like to allow external hosts to connect to guest machines, but the automatically created iptables rules forbid it. I have found this rather old post on the mailing list http://www.redhat.com/archives/libvir-list/2007-January/msg00048.html which suggests a "forwarding" element for the network configuration, but this seem to be unimplemented. cheers Mathias