Customize Symfony for development environment
When you use a development environment similar to the production, you can’t use the app_dev.php as given. With vagrant your front IP could be 192.168.33.10 With docker you can define a front IP as 172.10.0.1 So open app_dev.php and change the following code if (isset($_SERVER['HTTP_CLIENT_IP']) || isset($_SERVER['HTTP_X_FORWARDED_FOR']) || !(in_array(@$_SERVER['REMOTE_ADDR'], ['127.0.0.1', '::1', '192.168.33.10', '172.10.0.1'], true) || PHP_SAPI === 'cli-server') ) { header('HTTP/1.0 403 Forbidden'); exit('You are not allowed to access this file. Check '.basename(__FILE__).' for more information.'); } Keep in mind, always use private IP and don’t include this file during deployment to your production ...