options {
allow-transfer {Secondary Server IP; }; allow-recursion { 127.0.0.1; A.B.C/24; }; };</>
In secondary server:add to options:
allow-transfer { none; }; allow-recursion { 127.0.0.1; A.B.C/24; };
If you own your DNS servers, you should probably want to close recursive queries being gathered from your servers. In named.conf edit the options directive and add:
add to options:
add to options:
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