To extract and log the actual client IP address from the X-Forwarded-For header of a request using an Apache server, make the following changes to the server: Log into the Apache server. Go to /etc/httpd/conf or /usr/local/apache2/conf path and open the file httpd.conf . Search for the string: “ LogFormat “%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined ” Change the %h to %{X-Forwarded-For}i . The string now appears as “ LogFormat "%{X-Forwarded-For}i %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" " combined ” Save the file and restart apache or httpd.
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