If you want to log the actual client IP address, you need to extract the X-Forward-For header from the request and in order to do that, you need to make a tiny edit in your httpd.conf file.

1. Go to /etc/apache2/conf or /etc/httpd/conf and open httpd.conf file.
2. Search for the string that starts with: LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined.
3. Modify the %h to %{X-Forwarded-For}i. Now, it should look like this: LogFormat "%{X-Forwarded-For}i %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined.
4. Test the config to ensure that there are no typos by typing: apachectl configtest.
5. Save and restart the service by typing: systemctl restart httpd or systemctl restart apache2.
6. In your terminal, type tail -f /var/log/httpd/access.log and you'll be seeing the client IP being logged in your logs.

Hope you found this tip useful!