Authoritative NXDOMAIN responses
|Reported by:||kchen||Owned by:||ecprice|
Responses which return an NXDOMAIN or NOERROR (with 0 responses) should set the authoritative (aa) bit. This will allow for negative caching (if desired by returning the SOA record in the authority section as well). The bit should be set regardless of whether negative caching is desired, though.
Positive responses already correctly set the aa bit.