I am testing lets encrypt on one of my root-server (Ubuntu 18.04.1 LTS minimal with apache 2.4.29).
Installed the certificate via “certbot --apache” and got ssllabs.com Rating A
Same on several other test-pages like geocerts, digicert, htbridge etc. all Ratting A.
Most Browsers like FF, Chrome, IE handle my certificate as trusted, but not iOS devices like iPad (iOS 12.1.1) or iPhone (iOS 11.2.6).
They show a red URL-Bar on Safari.
Since that devices don’t allow the user to check the certificate, I have no idea what the problem is. Can anyone help?
Server: 126.96.36.199 (will redirect)
PS: I thought first the CA is not rooted in the iOS devices but this page here from letsencrypt is not red and I use the same path in my certificat.