logging {
  channel bind_log {
    file "/var/log/named/named.log" versions 3 size 5m;
    severity debug;
    print-category yes;
    print-severity yes;
    print-time yes;
  };

  category default { bind_log; };
  category update { bind_log; };
  category update-security { bind_log; };
  category security { bind_log; };
  category queries { bind_log; };
  category lame-servers { null; };
};