diff --git a/Corefile b/Corefile
index 4b66441..4414e1c 100644
--- a/Corefile
+++ b/Corefile
@@ -11,3 +11,9 @@
 
     forward . 127.0.0.11
 }
+
+. {
+    acl {
+        block
+    }
+}
\ No newline at end of file