Hi, I installed Ubuntu 16.04 LTS according to the Perfect Server tutorial and use ISPConfig to host three domains (only one has real traffic). They all use Let's Encrypt SSL certificates which work perfect in various browsers. If I use file_get_contents() in PHP to fetch the contents of a page of one of those domains errors appear: file_get_contents(): SSL operation failed with code 1. OpenSSL Error messages: error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed If I try to fetch that URL with wget on the command line (with the web site user) then it works fine. In php.ini the cacert settings are empty, which means that the OS settings will be used. Since wget works fine I'd expect the OS defaults to work, yet they don't. Should it really be necessary to add extra .ini files to the PHP configuration? If yes, should the cacert path point to /etc/ssl/certs/? Thanks for your help!