UPNP issues with RT-AC66U

[scope021]

I have a machine running a miniDLNA/upnp server connected to an RT-AC66U in Media Bridge mode, which is in turn connected to another AC66U in Router Mode. I stream videos from the server to a PS3 (which is connected to the AC66U in Router mode). This used to work flawlessly with my old Buffalo routers, but with the AC66Us, the upnp server keeps disappearing from the network. If I restart the minidlna service, it will appear again, but will disappear the next time I turn on the PS3. Seems like the RT-AC66U is blocking whatever packets minidlna is sending out to broadcast its presence, except when I restart the service. Is there a setting I need to change on the router(s)?

 

[TeHashX]

Disable the built-in minidlna server if you use another one in the same network.

 

[scope021]

Yeah, I've disabled the built-in minidlna servers on both routers. Still having the same problem.

 

[scope021]

After doing some research, it seems like the Media Bridge is blocking/filter out SSDP packets from getting to my minidlna server. How can I force the AC66U to allow these packets through?