Nextcloud SSl Setup

[duck]

I've been trying to setup nextcloud for at least 2 weeks. I have a domain setup with cloudns and a cron job working alright. Opened port 80 and 443 on my router. Then i tried to login but my router doesnt support reverse nat configuration so i have to use the local ip when im in the network and the domain when im outside the local network. The thing is that i cant assign any ssl certs to nextcloud.Ive tried separate jails, vms and i cant get around it. Thanks in advance!