I have deactivated Cloudflare on 4 of my websites due to the following reason.
It seems that Cloudflare is blocking the WordFence servers from communicating with my websites. I am getting the following error when having CloudFlare activated on my domains.
“Warning: Cannot modify header information – headers already sent by (output started at /home/mysite/public_html/wp-cron.php:28) in /home/mysite/public_html/wp-content/plugins/wordfence/lib/wfUtils.php on line 1674”
And this on the Connectivity debug tool:
“wp_remote_post() test back to this server failed! Response was: 503 Service Unavailable”
Please check this issue, I cannot use your service until this has been fixed.