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CloudFlare adds Virtual DNS Security Service [DDoS protection]
With Virtual DNS, DNS queries for the provider's records are responded to by the nearest CloudFlare edge location. If the proper DNS response is available in CloudFlare's cache, CloudFlare will return the response to the visitor, saving bandwidth at the origin nameserver.
If the DNS response is not available in cache, CloudFlare will query one of the provider's nameservers in the background to fetch the DNS response and send it back to the visitor. Simultaneously, that response will be temporarily cached on CloudFlare to be automatically returned when the next query for that record comes along
To protect against attacks, malicious requests to the nameservers will be identified and blocked at CloudFlare’s edge before those requests ever make it to the provider's DNS infrastructure.
TL;DR
You keep your self hosted DNS infrastructure and get DDoS protection too.
If you get some pricing, spill it out here.
