Visit https failed

Website, Application, Performance
1

What is the name of the domain?

9588.ai

What is the issue you’re encountering

https proxy is opened,but visit https failed,my backend not receive request.only http can visit and receive request.

2

Your domain is returning a 521 error on HTTPS, which means that Cloudflare was unable to connect to your origin server on port 443. You need to set up your server for HTTPS.

2 Likes
3

thanks,i find the reason.I don’t know when the ssl configuration in CF became strict, I just changed it to flexible

4

That means you are sending all traffic to your origin without encryption which misleads your visitors into thinking that their submission is safe when it really isn’t. You really should secure your origin. If you don’t want to use a free automated CA, like Let’s Encrypt, you can always use a free Cloudflare Origin CA certificate.

3 Likes
6

I used CF’s free certificate, but I didn’t use SSL from CF’s proxy to my server. Because I wanted to hide the backend IP, I didn’t use other free certificates.