[Solved]

Had to recreate the container connecting it to host network
Create line goes as such:
"sudo docker run -d -p 34197:34197/udp -p 27015:27015/tcp -v /opt/factorio:/factorio --network host --name factorio --restart=always factoriotools/factorio"

Hope this helps others

Alright here goes nothing: Currently pulling my hair out trying to run a dedicated host:

System is Ubuntu Focale 20.04, running latest docker version and the Factorio Docker image (This One: https://hub.docker.com/r/factoriotools/factorio). All behind a PfSense router.
Port Forwarding and ...