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I do have a unifi controller in the LAN, but I already did a test with just my laptop and a STB in a separate physical network and had the same problem. I do seem some IGMP traffic coming from my laptop which I find suspicious but this all does not seem to effect the Fritz box.

[Sep 21 11:24:27 OPNsense igmpproxy[40875]: RECV Leave message from 192.168.6.17 to 224.0.0.2]

I am trying to replace the Fritzbox with OPNSense but have some issues with the IPTV.

After following the various tutorials, mostly everything works except the TV stream stops after approx 8.5 minute, zapping to other channels resumes the stream for another 8.5 minute.

The igmpproxy is running and does not show errors in the log. When I start the igmpproxy manually with -v switch I see nothing unusual. Here a fragment:

Sep 21 11:20:03 OPNsense igmpproxy[40875]: The IGMP message was from myself. Ignoring.
Sep 21 11:20:03 OPNsense igmpproxy[40875]: RECV V3 member report   from 10.194.137.96   to 224.0.0.22
Sep 21 11:20:03 OPNsense igmpproxy[40875]: The IGMP message was from myself. Ignoring.
Sep 21 11:20:05 OPNsense igmpproxy[40875]: RECV V2 member report   from 192.168.6.17    to 224.0.252.136
Sep 21 11:20:05 OPNsense igmpproxy[40875]: Adding MFC: 217.166.226.136 -> 224.0.252.136, InpVIf: 1
Sep 21 11:20:05 OPNsense igmpproxy[40875]: RECV Membership query   from 10.64.60.58     to 224.0.0.1
Sep 21 11:20:08 OPNsense igmpproxy[40875]: RECV V2 member report   from 192.168.6.17    to 224.0.252.136
Sep 21 11:20:08 OPNsense igmpproxy[40875]: Adding MFC: 217.166.226.136 -> 224.0.252.136, InpVIf: 1
Sep 21 11:20:11 OPNsense igmpproxy[40875]: RECV Membership query   from 192.168.6.6     to 224.0.0.1
Sep 21 11:20:15 OPNsense igmpproxy[40875]: RECV V2 member report   from 192.168.6.17    to 224.3.2.6
Sep 21 11:20:15 OPNsense igmpproxy[40875]: Adding MFC: 213.75.167.58 -> 224.3.2.6, InpVIf: 1
Sep 21 11:20:15 OPNsense igmpproxy[40875]: The IGMP message was local multicast. Ignoring.
Sep 21 11:20:15 OPNsense igmpproxy[40875]: RECV V3 member report   from 10.194.137.96   to 224.0.0.22
Sep 21 11:20:15 OPNsense igmpproxy[40875]: The IGMP message was from myself. Ignoring.

192.168.6.17 is the TV box and 192.168.6.6 the OPNSense.

Only strange thing is this:
Sep 21 11:24:22 OPNsense igmpproxy[40875]: The IGMP message was from myself. Ignoring.
Sep 21 11:24:25 OPNsense igmpproxy[40875]: RECV Membership query   from 192.168.6.6     to 224.0.0.1
Sep 21 11:24:27 OPNsense igmpproxy[40875]: RECV Leave message      from 192.168.6.17    to 224.0.0.2
Sep 21 11:24:27 OPNsense igmpproxy[40875]: leaveMcGroup: 224.0.252.136 on igb2
Sep 21 11:24:27 OPNsense igmpproxy[40875]: RECV Membership query   from 192.168.6.6     to 224.0.252.136
Sep 21 11:24:27 OPNsense igmpproxy[40875]: RECV V2 member report   from 192.168.6.17    to 224.0.252.136
Sep 21 11:24:27 OPNsense igmpproxy[40875]: Adding MFC: 217.166.226.136 -> 224.0.252.136, InpVIf: 1
Sep 21 11:24:27 OPNsense igmpproxy[40875]: joinMcGroup: 224.0.252.136 on igb2

The leave message, this was without zapping channels.

I have tried anything I could think of. This was with version 20.7.2 on a APU2, VLANs are handled by the Switch, IGMP Snooping enabled. With the Fritz box everything works fine.

Anything I could have missed?

Lex