If the VM cannot be pinged, this seem to work:
iptables -A POSTROUTING -t nat --src 10.0.0.0/24 -j MASQUERADE
https://ask.openstack.org/en/question/9340/cant-ping-from-vm-to-controller-node-ubuntuhavananova-networking/
If the VM cannot be pinged, this seem to work:
iptables -A POSTROUTING -t nat --src 10.0.0.0/24 -j MASQUERADE
https:/ /ask.openstack. org/en/ question/ 9340/cant- ping-from- vm-to-controlle r-node- ubuntuhavananov a-networking/