acl "everybody" {
        0.0.0.0/0;
};

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;

        listen-on-v6 { any; };

        recursion yes;
        allow-recursion { everybody; };
        allow-transfer { none; };
};