options {
        directory "/var/cache/bind";
         // If there is a firewall between you and nameservers you want
        // to talk to, you may need to fix the firewall to allow multiple
        // ports to talk.  See http://www.kb.cert.org/vuls/id/800113
         // If your ISP provided one or more IP addresses for stable
        // nameservers, you probably want to use them as forwarders.
        // Uncomment the following block, and insert the addresses replacing
        // the all-0's placeholder.
         // forwarders {
        //      0.0.0.0;
        // };
         //========================================================================
        // If BIND logs error messages about the root key being expired,
        // you will need to update your keys.  See https://www.isc.org/bind-keys
        //========================================================================
        dnssec-validation auto;
        auth-nxdomain no;
        allow-recursion { 127.0.0.1; ::1; };
        allow-transfer {"none";};
        hostname none;
        server-id none;
        version none;
};
