On Feb 7, 2017, at 4:48 PM, Mark Andrews <ma...@isc.org> wrote:
> Go add a empty zone (SOA and NS records only) for alt to your
> recursive server.  This is what needs to be done to prevent
> privacy leaks.

No, the recursive server can just cache the proof of nonexistence.   I didn't 
query the root when I did my test—I ran the query through comcast's servers.   
Worked just fine.   Yes, if you configure your local server to lie, that won't 
work.   That's by design.

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