Adding X-Forwarded-For header logging on Apache for ISPConfig3

If you’re running your Apache with ISPConfig3 behind a reverse proxy or load balancer, you’ll probably want to log the X-Forwarded-For header, set by your reverse proxy/load balancer. If your setup sets a custom header, no worries, the method is the same.

The LogFormat format for ISPConfig3 with Apache is stored in /etc/apache2/sites-available/ispconfig.conf, the line looks like this:

LogFormat “%v %h %l %u %t \”%r\” %>s %O \”%{Referer}i\” \”%{User-Agent}i\”” combined_ispconfig

To add logging for the X-Forwarded-For header, simply add

%{X-Forwarded-For}i

anywhere you’d like the users actual IP to be logged. Here’s what mine looks like:

LogFormat “%v %h %{X-Forwarded-For}i %l %u %t \”%r\” %>s %O \”%{Referer}i\” \”%{User-Agent}i\”” combined_ispconfig