Www.portal.domain is not working instead of portal.domain

[helpweb.kft]

i have a certificate on my website for the ‘www.portal.domain’ site.
some of my users browse also the address: portal.domain site so i have to secure both the addresses via cloud flare, but if activating the could flare for portal.domain it works and i get the cloudflare certificate but if I:
activate the couldflare in www.portal.domain it does not work (This site can’t provide a secure connection
www.portal.domain uses an unsupported protocol. ERR_SSL_VERSION_OR_CIPHER_MISMATCH

If I don’t activate the cloudflare cloud for the www.portal it (obviously) works getting the real certificate on the server, but exposing it…

What should i do to fix the problem?
thank you

[Judge]

if you mean www.portal.domain.com (.com being any top-level domain you have), this isn’t possible due to how TLS works. A wildcard certificate, which is what Cloudflare issues you, only covers one level of subdomains, eg *.example.com covers test.example.com but not abcd.example.com. WWW is a subdomain just like the rest so it has this issue.

Subdomain too deep

This tutorial covers a possible reason for the SSL_ERROR_NO_CYPHER_OVERLAP and ERR_SSL_VERSION_OR_CIPHER_MISMATCH errors (Firefox and Chrome respectively) when seen on a subdomain. The Cloudflare universal certificates cover example.com and *.example.com. This means that it covers any subdomain one level below the domain you signed up with. It will cover www.example.com and subdomain.example.com, as these are one level below the root domain, example.com. The certificate will not cover www.sub…