options {
	directory "/var/cache/bind";

	auth-nxdomain no;    # conform to RFC1035
	
	listen-on-v6 { none; };
	listen-on { 127.0.0.1; };
	
    dnssec-enable yes;
    dnssec-validation yes;
    dnssec-lookaside "." trust-anchor "dlv.isc.org";

    version none;

    allow-query { any; };
    allow-recursion { any; };
	
	minimal-responses yes;
	max-cache-size 32M;
	cleaning-interval 15;
	max-cache-ttl 604800;
	max-ncache-ttl 300;
};