[Koha] https 403 Forbiden

[| dalmeida |]

Hello,

I've installed SSL certificate and it passed in the decoder.link, so the
installation is correct but I can't redirect http to https. In the https
URL I get the 403 Forbiden error, because koha can't run in http and https
simultaneously I think... right? So which files do I have to edit in order
to change http to https and what are those changes?... This is an IP based
installation, OPAC and Staff pages run in 80 and 8080 ports, in Debian 8 OS
and Koha 16.05.10 version.

Many thanks for any help.
Diva