Did you purchased a dedicated one (like Advanced Certificate Manager) or using your own which is installed at your origin host / server (like Let’s Encrypt or some purchased like from NameCheap, etc.)?
When was it? Can you try to contact Cloudflare support again and may I ask you to post your ticket number here, if so?
Or sending an an e-mail to support[at]cloudflare[dot]com from your e-mail associated with your Cloudflare account?
To which one TLS minimum version is set to at Cloudflare dashboard? And which TLS version / ciphers does the origin host / server support?
Kindly, see below articles how to propperly setup SSL for your domain …
Furthermore, here is a way to re-check if you correctly setup the SSL for your domain with Cloudflare:
If any other issues appear, follow the needed steps for troubleshooting from article below:
Regarding available SSL options at Cloudflare dashboard, check here:
In case you do not have an SSL certificate, you can use Cloudflare SSL, if so, kindly make sure you follow the instructions as follows on the below article to setup an SSL certificate using Cloudflare CA Origin Certificate:
I turned of “universal” yesterday and still see no changes at all. maybe I need to wait a little longer…it is not 24hrs yet.
Firefox still gives me:
Secure Connection Failed>
An error occurred during a connection to sub.sub.domain.xy Cannot communicate securely with peer: no common encryption algorithm(s).
Error code: SSL_ERROR_NO_CYPHER_OVERLAP
The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
Please contact the website owners to inform them of this problem.
and Chrome says:
This site can’t provide a secure connection
sub.sub.domain.xy uses an unsupported protocol.
The client and server don’t support a common SSL protocol version or cipher suite.
My ssl encryption mode is FULL. SSL Recommender is on. The EdgeCertificate Tab now says “No Certificates”, always use https is off, hsts if off, min TLS is 1.0, tls1.3 is enabled, automatic https rewrites is on, CT monitor is on, Universal SSL is disabled.
Cloudflare Universal Certificates cover only one level of subdomain. If you need more than that you can subscribe to Advanced Certificate Manager, or upload a Custom SSL Certificate on Business or Enterprise plans.