Re: How to display the True-Client-IP header in the access log

Jim Albert <jim@xxxxxxxxxxxxx> · Tue, 19 Oct 2021 08:05:39 -0400

On 10/19/2021 7:43 AM, Mason Hayes wrote:

Hi, All

When Apache is accessed via a CDN (Akamai), I would like to record the 

IP of the accessing client in the Apache logs.

In order to display the True-Client-IP header sent by Akamai in the 

access log like X-Forward-For, do I have to change the Logformat 

setting in httpd.conf as follows?

Logformat

"%{True-Client-IP}i %h %l %u %t˶~˵"%r\" %>s %b˶~˵"%{Referer}i\" 

\%{User-Agent}i\" combined

If anyone has had any success with True-Client-IP showing up in the 

logs, please let me know.

Regards,

If the real client IP is not in X-Forwarded-For you'll need to know what 

environment variable it is supplied in. You should be able to write some 

server side code to list all the environment variables and their values 

presented to you by the web server. That variable in Apache for me  is 

X-Forwarded-For.

Jim

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