I’ve just set up my domain to go through cloudflare dns, and while it worked for a short while after getting it up and running, I’m now getting 521 errors every time I try to access the server via my domain. I have an A record linking from my domain to my webserver IP, a CNAME record linking www to…

[image] a0lite: I’m currently using Flexible SSL Mode. Thats a problem in multiple ways: its not safe and secure it makes the request go like this: CLIENT =(:443)=> CLOUFLARE =(:80)=> SERVER That means, your request will be redirected to port 80 at your origin server. [image] a0lite: …

Error 521 when web server is fully responsive

Website, Application, Performance DNS & Network

sdayman May 23, 2021, 5:38pm 3

It could just be rate limiting since now all your traffic is funneled through a small set of Cloudflare IP addresses.

1 Like

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Error 521 when web server is fully responsive

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