ncw
(Nick Craig-Wood)
23
Hmm, I wonder if we are attempting to send out of the wrong interface or something like that
If you run server dlna with -vv it will print which interfaces it is attempting to use.
The packet being blocked is a multicast packet this may be relevant: java - Android device not receiving multicast package - Stack Overflow
As far as I can see there isn't a go native way of acquiring the multicast lock (at least not in gomobile).
This is the termux issue for allowing it to add a multicast lock: