named.conf.options

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 {
		8.8.8.8;
		8.8.4.4;
	};

	allow-recursion { any; };
	allow-query-cache { any; };

	//========================================================================
	// 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;    # conform to RFC1035
	listen-on-v6 { any; };

    // DNS dynamic updates via Kerberos
    tkey-gssapi-keytab "/var/lib/samba/private/dns.keytab";
};
dlz "AD DNS Zone" {
    database "dlopen /usr/lib/x86_64-linux-gnu/samba/bind9/dlz_bind9_9.so";
};