Presumably the CDN would be whitelisted and scanners would therefore be unable to determine which of the many unresponsive IPs host the service in question. It

Presumably the CDN would be whitelisted and scanners would therefore be unable to determine which of the many unresponsive IPs host the service in question. It may be weak security to keep a bit of cash in my cars glovebox rather than in plain sight, but let me tell you how effective it is at keeping my windows from getting smashed...