Causes

Cloudflare halted the request because of :

• an A record within your Cloudflare DNS app points to a Cloudflare IP address.
• Your Cloudflare DNS A or CNAME record references another reverse proxy (such as an nginx web server that uses the proxy_pass function) that then proxies the request to Cloudflare a second time.
• The request X-Forwarded-For header is longer than 100 characters.
• The request includes two X-Forwarded-For headers.

Fixes

Step 1 :

If an A record within your Cloudflare DNS app points to a Cloudflare IP address, update the IP address to your origin web server IP address.

Step 2 :

There is a reverse-proxy at your origin that sends the request back through the Cloudflare proxy. Instead of using a reverse-proxy, contact NET support or site administrator to configure an HTTP redirect at your origin.