Help setting up remote access

[nocturnalnerd]

My issue is that I can't access at all my network router settings since my ISP doesn't allow that. I live in a condo, with the usual ISP monopoly, and they don't allow any access to the router settings, which is a requirement from all the guides I've seen to set up remote access to my Jellyfin server. 

I have it running using Docker in a Synology NAS. Please help me with a workaround that allows for me to use Jellyfin remotely while maintaining security.