Edit Apache configuration file
vi /etc/httpd/conf.d/remoteip.conf
Add
RemoteIPHeader X-Forwarded-ForRemoteIPTrustedProxy IP_OF_YOUR_PROXY_SERVER_HERE
Example
[root@localhost ~]# cat /etc/httpd/conf.d/remoteip.confRemoteIPHeader X-Forwarded-ForRemoteIPTrustedProxy 192.168.122.1[root@localhost ~]#
Doing this will make PHP scripts show real IP of visitor. You need to restart Apache web server before the change take effect. You can verify by creating a PHP script with content
<?php echo $_SERVER["REMOTE_ADDR"];
To make Apache show real IP in access log, edit
vi /etc/httpd/conf/httpd.conf
Find
LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combinedReplace with
LogFormat "%a %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" combinedRestart Apache web server
Centos / Redhat :
systemctl restart httpd
Ubuntu :
systemctl restart apache2