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 yes;
    dnssec-enable yes;
    auth-nxdomain no;    # conform to RFC1035
    allow-new-zones yes;
    request-ixfr no;
    recursion no;
    query-source address * port {{ designate.bind_port.cont }};
    listen-on { any; };
    listen-on-v6 { ipv-6-address; };
    allow-query {
       any;
       10.233.0.0/16;
    };
    allow-notify {
       any;
       10.233.0.0/16;
    };
};