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rec: Do not allow direct queries for RRSIG or NSEC3 #5738
As pointed out in #5735, the recursor has an interesting issue when handling a direct query for the
One thing to ponder is that the current code sends a
BIND sends NOTAUTH (because it could be, software-wise). 220.127.116.11 sends ServFail. Unbound sends REFUSED. Knot gives NOTIMP.