Okay thank you anyways.
Maybe its not even a Problem with certificate ...
I could not connect to my mongodb via curl and i thought it would be an certificate issue.
But maybe I configured nginx reverse proxy the wrong way.
This is what i would normaly write in /etc/nginx/sites-enabled/default...
I tried out the Lets Encrypt plugin.
But like I said I also wanna secure my mongodb via ssl and therefore i wanna use the same certificate.
But the problem is that the Lets Encrypt plugin creates several different files with different filenames each time... but after each renewal i need to link...
I have a problem with configuring ssl in apache 2 vhost configuration running plesk.
My Server is running on a virtual machine with plesk 12.
And basically I just want to setup ssl for the domain.
I know there is a plugin espacially for this but I also need an ssl certificate for my mongodb...