Minidlna serving LAN and WAN

I'm trying to get minidlna to work in the following topology:

        || to internet
        ||
|----------------|
|  Main Router   |
| 192.168.2.1/24 |
|----------------|
       /_ 
        /_ Main router WiFi clients on .2.1/24 subnet
         /                                              outside my control
_______________________________________________________________________________
   192.168.2.47                                         inside my control
|----------------|
|      WWAN      |        ↑ to WWAN main router clients
| Private Router |---DLNA-- 
| 192.168.11.1/24|        ↓ to LAN private clients
|----------------|
        /_
         /_  Private wi-fi clients on .11.1/24 subnet
          /    

I want to be able to serve to both private and main router clients. I have minidlna listening on both br-lan for local clients and wwan for the main router clients.

Private wi-fi clients on the 192.168.11.1/24 subnet can see the minidlna server AND play content.
Main router clients on the 192.168.2.1/24 subnet can see the minidlna server but cannot play content.
Clients here can see the folders on the server, but the folders all appear empty.

I have ports 1900 and 8200 opened in the firewall.

What else do I need to do to serve both sides?

For anyone who comes along in the future, I got it to work by opening up the following in the firewall:

config rule
	option name 'Allow-Remote-MiniDLNA-1'
	list proto 'tcp'
	option src 'wan'
	option dest_port '8200'
	option target 'ACCEPT'

config rule
	option name 'Allow-Remote-MiniDLNA-2'
	list proto 'udp'
	option src 'wan'
	list dest_ip '239.255.255.250'
	option dest_port '1900'
	option target 'ACCEPT'

config rule
	option name 'Allow-Remote-MiniDLNA-3'
	list proto 'igmp'
	option src 'wan'
	list dest_ip '224.0.0.1/32'
	option target 'ACCEPT'

config rule
	option name 'Allow-Remote-MiniDLNA-4'
	list proto 'igmp'
	option src 'wan'
	list dest_ip '239.0.0.0/8'
	option target 'ACCEPT'

Just a note, this dangerous unless you are in a situation where the router is itself behind another firewall.

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