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I'm trying to set up a CTF box, and have settle upon vagrant for managing my VMs.

However, I seem to be unable to isolate the machines from each other, as the libvirt management interface is allowing routing between them. These boxes will be executing untrusted code as root, and so solutions local to the VM will not suffice.

I have tried the following config:

  config.vm.provider :libvirt do |prov|
    prov.management_network_mode = "none" # "veryisolated"
    prov.management_network_guest_ipv6 = false
  end

with both "none" and "veryisolated", but to no avail.

Does anyone know how I could do this?

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