Re: [libvirt] [PATCH 0/9] add DHCP snooping support to nwfilter

The following series of patches replaces IP address learning in network filtering with DHCP snooping. The existing address learning capability does not provide security since it relies on addresses used in initial packets sent by the guest to determine an IP address. A spoofing guest can simply arrange to send packets using the target address early on. With DHCP snooping, only addresses acknowledged by a DHCP server can be used by the guest, and only for the given lease time if the address lease is not renewed. The patches also add support for multiple IP addresses per interface.