Also, another example would be having a pfSense VM and since all of your containers have no internet, when the auto-check for update occur on Docker service start, it waits like a minutes or 30 seconds to timeout for each of your containers....Last boot when I had pfSense in a VM was 15 mins (most of that was docker checking for updates, a little was the VM trying to pxe boot (anyone know how to disable pxe booting for SeaBios VMs?))