While installing minidlna onto a media server, using the dual band draft-n wireless nic it came up to iptables over there.
First thing is to adapt related state from eth0 to ra0, or everythin else will fail.
Afterwards make sure that you’ll open tcp/udp 8200 for minidlna’s listening port. And next to that make sure that udp 1900 is open too, otherwise UPnP clients will not discover the presence of the DLNA server.