Nginx Nginx + Cloudflare, Incapsula reverse proxy usage

According to Centmin Mod user survey at http://community.centminmod.com/threads/centmin-mod-survey-2013-2014.82/, there's quite a number of folks using Cloudflare in front of Centmin Mod Nginx web server.

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For folks who intend to do this, please read the following guide from the official web site

• Nginx + Cloudflare, Incapsula & Google PageSpeed Service IP addresses (reverse proxy HttpRealIpModule)