Hello!
I have installed Let’s Encrypt on my server (Ubuntu 16.04), i configure my certs on apache2,
I use this to configure
SSLEngine on
SSLProxyEngine on
SSLCertificateFile /etc/letsencrypt/live/softlinex.net/cert.pem
SSLCertificateKeyFile /etc/letsencrypt/live/softlinex.net/privkey.pem
When i access to my page from computer all works very well, but when i try do it from a mobil device (smart phone, tablet) i have and error saying “this connection is not verified”
You need the intermediate certificate, which confirms to clients that Let’s Encrypt is a real certificate authority. You can check this with https://www.ssllabs.com/ssltest/; be sure that your configuration refers to fullchain.pem (for newer versions of Apache) or chain.pem (for older versions).