My ISP provides IPTV by multicast. If I plug the receiver directly to the incoming WAN port it works but if I put it behind the router the video feed is blocked. The ISP mentioned that a switch before the router to feed the receiver and the router should do the trick. However I do not want to add a switch since I have limited space and making it work would mean that I would need another switch in the TV cabinet.
I tried to follow the guide here https://wiki.openwrt.org/doc/howto/udp_multicast but all it resulted in was a non-responsive router which I had to reset since I could not log in anymore. Maybe I missed something specific to the Turris Omnia.
Any help is appreciated.