1 files changed, 4 insertions, 0 deletions
diff --git a/utils.php b/utils.php
index 6baafb8..ec3db07 100644
--- a/utils.php
+++ b/utils.php
@@ -19,6 +19,10 @@
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
  */
 
+if (!defined('LOOKING_GLASS01')) {
+  exit;
+}
+
 function match_ipv4($ip) {
   return filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4);
 }