Accessing the user’s IP address on AEM servers in AMS

APACHE CONFIGURATION FILE: /etc/httpd/conf.d/httpd.conf

<IfModule remoteip_module>    
 RequestHeader edit X-Forwarded-For ([0-9]+(?:\.[0-9]+){3})(:[0-9]+)? $1 early
 # valid for ALB, ELB, AppGateway or Load Balancer + CloudFront
 RemoteIPHeader X-Forwarded-For
 # valid for ALB, ELB, AppGateway or Load Balancer + Akamai
 RemoteIPHeader True-Client-IP
</IfModule>

The above change will make sure the user’s IP address is added to the request header. The name of the header is X-Forwarded-For. 

Also, the header will have 2 IP addresses ( comma separated ). We have to make sure we read the first IP address from the CSV string.