Limitations for Universal SSL
Universal SSL certificates are limited by the hostnames they cover and the browsers they support.
Hostname coverage
Full setup
Universal SSL certificates only support SSL for the root or first-level subdomains such as example.com
and www.example.com
. To enable SSL support on second, third, and fourth-level subdomains such as dev.www.example.com
or app3.dev.www.example.com
, you can:
- Purchase Advanced Certificate Manager to order advanced certificates.
- Upgrade to a Business or Enterprise plan to upload custom certificates.
CNAME setup
On a CNAME setup zone, each subdomain has its own Universal SSL certificate and does not require additional features or purchases.
Browser support
For more on browser support, see Browser compatibility.
Spectrum
Universal SSL is not compatible with Cloudflare Spectrum. If you are trying to use Spectrum, use either an advanced certificate or a custom certificate.
Certificate authority
For Universal SSL certificates, Cloudflare chooses the certificate authority (CA) used for your certificate.
Cloudflare can change the certificate authority without prior notification, and will not send any notification as the change happens.
If you want to choose the issuing certificate authority, order an advanced certificate.