Since CloudFlare, Acquia Cloud Edge Protect, and Acquia Cloud Edge CDN act as a reverse proxy, the IP address in Apache logs will show the CloudFlare IP address instead of the visitor's true IP address. To restore the true IP address of the visitor, please submit a Support ticket to request a reverse proxy header to CF-Connecting-IP.
Related topics:
Configuring Your Acquia Cloud Sites to Use Akamai
Logging Client IP in Apache Behind a Reverse Proxy