From the Cloudflare Panel, SSL/TLS
Use Full (strict)
Encrypts end-to-end, but requires a trusted CA or Cloudflare Origin CA certificate on the server
Now, i can use my Website, with Cloudflare Active.
Then, you see, my Website work, and, it’s not necessary to empty the firewall.
Thank you for the courage and the effort of the discussion, it pushed me to make the different Cloudflare IPs authorized on my server, in the VirtualHost file which treats listening only on the IP address.
Thank you for the advice to deactivate the Cloudflare service, in order to verify that the site works correctly in https: //
I did not need to make any other changes, only allow cloudflaire IP addresses, for the VirtualHost listening for the IP address.
The site then works correctly with Cloudflare deactivated.
From Cloudflare, I reactivated the site, and, I went into strict FULL mode for SSL / TLS.
Now, access to the https://www.tiger-green.fr site is working.
I still have to test if the mails work because I read that configurations are also necessary, but, that is another subject.