Check for localhost supports also IPv6 loopback address

index.php

@@ -18,7 +18,7 @@ $options = array(
  *
  * Source on Github http://github.com/Seldaek/php-console
  */
-if ($_SERVER['REMOTE_ADDR'] != '127.0.0.1') {
+if (!in_array($_SERVER['REMOTE_ADDR'], array('127.0.0.1', '::1'), true)) {
     header('HTTP/1.1 401 Access unauthorized');
     die('ERR/401 Go Away');
 }