Guest won't start - warning: could not open /dev/net/tun ('generic ethernet' interface) - Libvirt Wiki

Guest won't start - warning: could not open /dev/net/tun ('generic ethernet' interface) Use of the 'generic ethernet' interface type (<interface type='ethernet'>) is discouraged, because using it requires lowering the level of host protection against potential security flaws in qemu and its guests, but occasionally it's necessary to use this type of interface in order to take advantage of some oth