philippe_44 wrote: 
> Yes, I meant ufw, sorry. I can't see a way to tell what port will be
> opened because the protocol says that you have to open the UDP ports,
> tell the player what they are and then wait for packets. 
ufw doesn't support that, as far as I know.  There are undefined ports
above 30000 or so that UPnP needs, and probably airplay as well, so I
have to open a range above that level.

> For volume, testing, maybe you could just unplug the speakers and see
> what the amp says? 
Why didn't I think of that?

> The bridge never stops trying to detect players, they never get "burnt",
> that's why I'm surprised. Or it might mean some bug or a problem in the
> upnp library. Every X (30) s, there is a new discovery being launched
> and it starts w/o knowing anything from the past. Discovered players are
> then either already here and there "presence" is refreshed or they are
> new and they are added. There is no penalty box
Well that's far for the behaviour I see for UPnP or Airplay, which is
one reason why I use them with LMS less than other methods.   It's quite
possible that this is to do with ports, firewalls, and whether the
router supports certain types of fishing on the local network (for
instance I have UPnP support disabled in the router), or something to do
with my players.  I really don't know, but it's been a constant minor
frustration (I've tried waiting for many minutes with no success, and
ended up having to restart the bridge).  The behaviour isn't
predictable, and sometimes works fine.



LMS 7.9.1 on VortexBox Midi box, Xubuntu 17.10, FLACs 16->24 bit,
44.1->192kbps.  Touch & EDO. 2nd Touch standard.
LMS plugin UPnP/DLNA Bridge to MF M1 CLiC (to A308CR amp & ESLs) &
Marantz CR603 UPnP renderers.  
Alternatively Minimserver & Upplay to same & to upmpdcli/mpd PC
renderers.  
Squeezelite to Meridian USB Explorer DAC to PC speakers/headphones.  
Wireless Xubuntu 17.10 laptop firefox/upplay or Android 'phone with
Squeeze-Commander/BubbleUPnP controls LMS/Minimserver.
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