Index: branches/5.3.x/core/kernel/utility/http_query.php
===================================================================
diff -u -N -r16171 -r16395
--- branches/5.3.x/core/kernel/utility/http_query.php	(.../http_query.php)	(revision 16171)
+++ branches/5.3.x/core/kernel/utility/http_query.php	(.../http_query.php)	(revision 16395)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: http_query.php 16171 2015-05-13 19:21:22Z alex $
+* @version	$Id: http_query.php 16395 2016-11-12 12:43:14Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -364,6 +364,13 @@
 			$this->Application->VerifyLanguageId();
 		}
 
+		$virtual_template = $this->Application->getVirtualPageTemplate($this->Get('m_cat_id'));
+
+		if ( ($virtual_template !== false) && preg_match('/external:(.*)/', $virtual_template) ) {
+			trigger_error('URL of page, that has "External URL" set was accessed: "<strong>' . $_SERVER['REQUEST_URI'] . '</strong>"', E_USER_NOTICE);
+			$this->Application->Redirect($virtual_template);
+		}
+
 		if ( !$this->Application->isAdmin && $this->Application->ConfigValue('ForceCanonicalUrls') ) {
 			$template = $this->Application->GetVar('t');
 			$seo_template = $this->Application->getSeoTemplate($template);