Libvirt overwrites the existing iptables rules

From WBITT's Cooker!

XEN overwrites existing iptables rules

Not exactly. It is libvirt which is the culprit, not XEN.

• https://bugzilla.redhat.com/show_bug.cgi?id=227011
• http://lists.fedoraproject.org/pipermail/virt/2010-January/001792.html
• http://forums.gentoo.org/viewtopic-p-6209192.html?sid=1089acac70de96d68aa856d758d7cdfe
• http://wiki.libvirt.org/page/Networking
• http://libvirt.org/formatnetwork.html#examplesPrivate