# How to receive multicast messages in dockerized Node-Red

**URL:** <https://discourse.nodered.org/t/how-to-receive-multicast-messages-in-dockerized-node-red/59952>\
**Category:** General\
**Created:** [16 March 2022 20:58 UTC](https://discourse.nodered.org/t/how-to-receive-multicast-messages-in-dockerized-node-red/59952 "2022-03-16T20:58:55Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![rucksman007](https://avatars.discourse-cdn.com/v4/letter/r/a88e4f/32.png) [@rucksman007](https://discourse.nodered.org/u/rucksman007)\
**Post date:** [16 March 2022 20:58 UTC](https://discourse.nodered.org/t/how-to-receive-multicast-messages-in-dockerized-node-red/59952/1 "2022-03-16T20:58:55Z")

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There is a device on my network that sends out multicast messages to a specific port (9522) and a specific IP address (239.12.255.254). I want to receive these messages in my dockerized Node-Red. But after configuring the UDP IN node no messages are coming in. On a test machine with a regular Node-Red installation the exact same UPD IN node works perfect. How do I have to configure my Docker installation of Node-Red to receive these multicast massages?

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**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [16 March 2022 21:04 UTC](https://discourse.nodered.org/t/how-to-receive-multicast-messages-in-dockerized-node-red/59952/2 "2022-03-16T21:04:05Z")

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This is a common docker question one you will probably have to search or ask on stack overflow or a docker forum.

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [15 May 2022 21:04 UTC](https://discourse.nodered.org/t/how-to-receive-multicast-messages-in-dockerized-node-red/59952/3 "2022-05-15T21:04:58Z")

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