Error 521 with site hosted on Vultr


My main site is hosted in Vultr. When you access the site by IP Address it shows up with no problems. When you access the site via domain name, I get the error 521 from Cloudflare.

I added the Vultr IP to Cloudflare on Friday morning, it should have refreshed by now.


So since I know the site server is running, (nginx) because it responds to the ip connection, then what else can it be causing Cloudflare to think the web server is not active?


It appears Cloudflare is initially responding with a 526 error which indicates an SSL issue. If you have configured Cloudflare to use full strict, but don’t have a valid & trusted cert on the origin that can cause this issue.


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