Re: Cloudflare reverse DNS SERVFAIL, normal?

[Niels Bakker <niels=nanog () bakker net>]

* owen () delong com (Owen DeLong) [Wed 31 Aug 2016, 01:47 CEST]:
> You don’t get NXDOMAIN when a nameserver gets a request for a zone 
> it doesn’t serve.

Correct in most cases (there's an edge case where a server is [mis] 
configured as authoritative with its own empty . and its regular 
zones and allows global querying; it's similar to asking a root 
server for anything in a nonexistent TLD).


> You either get SERVFAIL or you  get NS records back as a referral.

Or REFUSED.


        -- Niels.