CloudFlare (Full strict) Error 426

[SM]

I am using CloudFlare Origin server SSL. I successfully installed CloudFlare Origin server SSL on CWPpro. But after select (Full (strict), i got error 426. When i select "Full" error is gone. i want to know what happening.
How to solved this problem.

[Starburst]

CloudFlare is a whole other headache.

Support is so-so, and causes you to bang your head on the desk.

[overseer]

You understand that CF Origin Server SSL certs only apply to HTTPS services? It won't do you any good for other services such as mail. So on a CWP LAMP/LEMP server that usually provides mail and FTP it's pretty much a non-starter. Go with LetsEncrypt or get an inexpensive Comodo PositiveSSL certificate. (Speaking as one who has been down this road!)