--- a/classes/shop/Shop.php
+++ b/classes/shop/Shop.php
@@ -411,38 +411,14 @@
         } else {
             $shop = new Shop($id_shop);
             if (!Validate::isLoadedObject($shop) || !$shop->active) {
-                // No shop found ... too bad, let's redirect to default shop
-                $default_shop = new Shop((int) Configuration::get('PS_SHOP_DEFAULT'));
+                // EduBox: behind a reverse proxy with dynamic public domains,
+                // the requested host never matches ps_shop_url. Always use the
+                // default shop instead of redirecting to a fixed canonical URL.
+                $shop = new Shop((int) Configuration::get('PS_SHOP_DEFAULT'));
 
-                // Hmm there is something really bad in your Prestashop !
-                if (!Validate::isLoadedObject($default_shop)) {
+                if (!Validate::isLoadedObject($shop)) {
                     throw new PrestaShopException('Shop not found');
                 }
-
-                $params = $_GET;
-                unset($params['id_shop']);
-                $url = $default_shop->domain;
-                if (!Configuration::get('PS_REWRITING_SETTINGS')) {
-                    $url .= $default_shop->getBaseURI() . 'index.php?' . http_build_query($params);
-                } else {
-                    // Catch url with subdomain "www"
-                    if (strpos($url, 'www.') === 0 && 'www.' . $_SERVER['HTTP_HOST'] === $url || $_SERVER['HTTP_HOST'] === 'www.' . $url) {
-                        $url .= $_SERVER['REQUEST_URI'];
-                    } else {
-                        $url .= $default_shop->getBaseURI();
-                    }
-
-                    if (count($params)) {
-                        $url .= '?' . http_build_query($params);
-                    }
-                }
-
-                $redirect_type = Configuration::get('PS_CANONICAL_REDIRECT');
-                $redirect_code = ($redirect_type == 1 ? '302' : '301');
-                $redirect_header = ($redirect_type == 1 ? 'Found' : 'Moved Permanently');
-                header('HTTP/1.0 ' . $redirect_code . ' ' . $redirect_header);
-                header('Location: ' . Tools::getShopProtocol() . $url);
-                exit;
             } elseif (defined('_PS_ADMIN_DIR_') && empty($shop->physical_uri)) {
                 $shop_default = new Shop((int) Configuration::get('PS_SHOP_DEFAULT'));
                 $shop->physical_uri = $shop_default->physical_uri;