Check PHP-FPM version on NGINX HTTP response $ curl -I localhost/index.php HTTP/1.1 200 OK Date: Sat, 12 Aug 2017 14:07:54 GMT Content-Type: text/html Connection: keep-alive X-Powered-By: PHP/5.5.9-1ubuntu4.22 How to hide PHP-FPM Version (X-Powered-By:) on NGINX vim /etc/php5/fpm/php.ini expose_php = Off Restart php5-fpm service /etc/init.d/php5-fpm restart Check the result $ curl -I localhost/index.php HTTP/1.1 200 ...