title: Receive UDP Multicast in Docker Container
body: <p>I am using docker compose and hypriotos on a raspberry pi running a node container. I would like to receive udp multicast messages send to 239.255.255.250:1982 in local network. My code is working on other machines outside of docker so I think it's a docker issue.</p>
  
  <p>I already exposed port 1982/udp in the docker file and in the docker-compose file I added "1982:1982" and "239.255.255.250:1982:1982/udp" to ports. I still can't receive anything. Am I missing something?</p>
  
  <p>My concrete plan is to receive advertisement messages from a yeelight. These messages are documented <a href="http://www.yeelight.com/download/Yeelight_Inter-Operation_Spec.pdf" rel="noreferrer">here</a></p>
  
  <p>Any help would be nice. Thanks.</p>