acl "slave_servers" {
         123.123.123.123; };
     acl "trusted" {
             127.0.0.0/8;
             ::1/128;
             123.123.123.123; };
     options {
             directory "/var/named";
             pid-file "/var/run/named/named.pid";
             listen-on { any; };
             allow-query { any; };
             allow-query-cache { any; };
             allow-transfer { 123.123.123.123; };
             also-notify { 123.123.123.123; };
             allow-recursion { trusted; };
             zone-statistics yes;
             statistics-file "/var/cache/bind/named.stats";
             auth-nxdomain no; # conform to RFC1035
             };
     };
     logging {
                channel default_log {
                        file "/var/log/named/named.log" versions 5 size 50M;
                        print-time yes;
                        print-severity yes;
                        print-category yes;
                };
                category default { default_log; };
                category general { default_log; };
                channel b_query {
                        file "/var/log/named/query.log" versions 2 size 1m;
                        print-time yes;
                        severity info;
                };
                category queries { b_query; };
        };
           include "/etc/rndc.key";
        controls {
                inet 127.0.0.1 port 953 allow { 127.0.0.1/32; ::1/128; } keys { "rndc-key"; };
        };
            zone  domain.tld {
                type master;
                file "domain.tld.db";
        };