Usually, most web servers installed with default settings have information leakage, one of which is PHP. PHP is one of the most popular server-side HTML embedded languages today. In these challenging times, there are many attackers who will try to find vulnerabilities on your server. Therefore, I will briefly describe how to hide PHP information in a Linux server.
Expose_php is enabled by default. Turning off the "expose_php" parameter allows PHP to hide its version information.
[root@centos66 ~]# vi /etc/php.ini
In your php.ini, locate the line containing expose_php and set On to Off:
expose_php = Off
Before this, the web server header looked like this:
[root@centos66 ~]# curl -I http://www.ehowstuff.com/
HTTP/1.1 200 OK Server: nginx Content-Type: text/html; charset=UTF-8 Vary: Accept-Encoding X-Powered-By: PHP/5.3.3 X-Pingback: http://www.ehowstuff.com/xmlrpc.php Date: Wed, 11 Feb 2015 14:10:43 GMT X-Page-Speed: 1.9.32.2-4321 Cache-Control: max-age=0, no-cache
After changing and restarting the web service, php will no longer display the version in the web service header:
HTTP/1.1 200 OK Server: nginx Date: Wed, 11 Feb 2015 15:38:14 GMT Content-Type: text/html; charset=UTF-8 Vary: Accept-Encoding X-Pingback: http://www.ehowstuff.com/xmlrpc.php Date: Wed, 11 Feb 2015 14:10:43 GMT X-Page-Speed: 1.9.32.2-4321 Cache-Control: max-age=0, no-cache