Plex DLNA in same home network - not discovered

Apps and Virtualization
1

I am running Plex (app version:
1.41.5.9522-a96edc606) on my TrueNAS Scale (ElectricEel-24.10.2) and now want to use my Teufel Stereo L speakers to stream music. I turned the DLNA feature on in Plex and reduced the file formats to only audio in its advanced settings. However, in the Raumfeld app where I can add music ressources to play from, it doesn’t see the music/DLNA server. Anyone got this to work or has an idea where the issue might be? How could I test i.e. from my cellphone if the DLNA feature is discoverable?

On Discord someone told me this, maybe a hint?

Truenas scale is based on Linux so you might need to enable forwarding of ipv4 packets. This on Linux would be located under /etc/sysctl.conf

net.ipv4.ip_forward=1

Then reboot or type sysctl -p in shell to reload the daemon.

Not sure if that’s necessary. Not sure if it considers the container to be the same system if no then it might need to be enable

2

IIRC dlna doesn’t work with the bridged docker networks. You could try to switch to host networking, at least that helped someone who had problems on jellyfin and dlna.
See this post