Redirect loop when activating CloudFlare

Question

I am trying to put my website behind CloudFlare but unfortunately when I activate CloudFlare I start getting a redirect loop (I am using Chrome).

I have tried to clear the cookies, as recommended, but it does not solve the issue and I am not having this issue when CloudFlare is not activated.

What is causing this and how to solve it in my node.js application?

Answer 1

Apparently, this was a configuration issue. I was on Flexible SSL and changed it to full SSL.

My node.js app was receiving HTTP requests from CloudFlare and redirected to HTTPS, which CloudFlare converted back to HTTP, etc...