I have a set-up an Ubuntu 16.04 server on a redundant desktop PC and then installed ISPConfig. The internet connection is a static IP and the Ubuntu server is situated behind a firewall/router and have port forwarding to the machine. Pleased to say it 99% works
However I am getting some issues setting up SSL certificates for sub-domains running on this server. The ISPConfig interface appears to let me create a certificate but checking the SSL and Let's Encrypt tick boxes has no effect. When I do check them and press save, I go back to this page and find these tick boxes are not saved.
Need someone to take a look and tell what is going wrong (and in terms that I will hopefully understand).