New HA instance on Synology NAS, but still want to use the HA instance on RPI 3

So today I installed the Hass.io package for Synology NAS and I have everything up and running, but I still want to use the Home Assistant on the Raspberry Pi 3 which I used before and is still running on my local network. I’ve had the Duckdns addon setup on the Pi, but I had to remove all the port forwarding rules for the Pi3 so I could use these ports for the new instance on the NAS.

All the automations etc are still working but I have no idea how to acces the old instance on the Pi 3… local.hassio:8123 is not working and also http://[pi-address]:8123 is not working. Do I have to delete the base_url in configuration.yaml to access the instance on the Pi?

The Pi should work as before. Synology install should have no affect.

How you access previously.

@tmjpugh, I accessed the Pi through my duckdns address, which is now unavailable because I used the port forwarding rules to point to my new duckdns address for the Synology instance.

Shouldnt you use https.