I have sartoolbox.com hosted and been doing fine for months, not a problem. Today mid day I got a down email notification. I check it and it has the Error 521 from cloudflare. Now I haven’t messed with any settings and not even went to the site for about a week.
It is a wordpress site hosted on digital ocean and I am using the strict SSL option in cloudflare. Haven’t changed any settings for months. The server stats are all good, nothing abnormal. Low load and no errors in any of the logs.
Just not sure what else to check or change, I tried moving from full to flexible ssl/tls but that only made it unreachable.