@murgero re-read, my response remains the same, sorry.
You know the way security scanners (or script-kiddies) works, it's to scan the network (Internet), get hosts and they software; if there is zero-day on CloudRon or other not disclosed vulnerability, apply it across the hosts.
Having DNS records showing that there is CloudRon here means you don't even need to scan for the ports, which just simplify things.
Hope that helps to understand my response here.