CloudFlare TSL/SSL requires SNI(Server Name Indication) on Virtaul Host in addition to listener level

A domain could not establish tsl/ssl connection when using Cloudflare. It might show the following in your Chrome or Firefox browser:

The site can't provide a secure connection
example.com users an unsupported protocl
ERR_SSL_VERSION_OR_CIPHER_MISMATCH

Or

Secure Connection Failed
An error occurred during a connection to example.com. Peer reports incompatible or unsupported protocol version.
Error code: SSL_ERROR_PROTOCOL_VERSION_ALERT

CloudFlare requires SNI(Server Name Indication). The user will need to have virtual host level SSL cert configuration in addition to listener level, even they are identical.