Plex Server on NAS, Luxul router and DS DAC+Bridge


I have added a Directstream DAC with Network Bridge I installed.

DS runs Yale and bridge runs FW 2.15.

I have a dedicated media server NAS with latest Plex Server running on it.

Tried a number of UPNP controllers including, mconnect control HD, Plug Player and Plex app for IPAD. They all see the Plex Server fine, but, not the DS DAC.

Is there a port forwarding setting to be done such as the default port of Plex, 32400?

Any thoughts please?