Owncloud module on NAS Deluxe

Hi there.

I installed owncloud Module on a NAS Deluxe of a friend of mine. Generelly it is working as it should.. I am only challenging the fact that it can not been Accessed outside of this private Network as the owncloud application restricts the Access from Domains. It says the config.php needs to be changed. unfortunately I can not find the file on the NAS. Can you give me a hint where to search? I also want to Change the https certificate. A guide, help for this would be very apprecheated,.

Thanks in advance.

ownCloud does not provide these packages, so you should ask the maintainer of this package where the files were installed.