TLDR : If we were not able to communicate with your WordPress sites, we found the fix. We now have a fix IP that you can whitelist: 141.95.192.2

Sometimes, we were not able to communicate with your WordPress sites because we were blocked by hosting providers or security plugins. We have upgraded our infrastructure and now have a fix IP that you can whitelist: 141.95.192.2 

You can find the whole documentation just here: whitelisting WP Umbrella's IP adresse.

This is a major improvement for Cloudflare users. 

If you still encounter a connection issue, please send us a message at support@wp-umbrella.com.