Host-only management network with vagrant-libvirt

Hi,

I’ve been trying to set up a CTF event, and keep running into problems isolating the boxes from one another on the management network. I have tried disabling the network altogether (which disables my ability to use boxes, rendering vagrant useless), and every option of node.vm.provider :libvirt that I could get my hands on, all to no avail.

Can anyone help me?