Write home or to whom?

General
1

After the last updates of node-red, I have noticed that it has started writing home.
I have not set up anything to write outside my home network.

On a rpiz2w

6 Sep 01:51:59 - [red] Uncaught Exception:
6 Sep 01:51:59 - [error] Error: send ENETUNREACH 224.0.0.251:5353
    at doSend (node:dgram:713:16)
    at defaultTriggerAsyncIdScope (node:internal/async_hooks:464:18)
    at afterDns (node:dgram:659:5)
    at processTicksAndRejections (node:internal/process/task_queues:84:21)
poul@PZW2-80:~ $ 


6 Sep 09:30:59 - [red] Uncaught Exception:
6 Sep 09:30:59 - [error] Error: send ENETUNREACH 224.0.0.251:5353
    at doSend (node:dgram:713:16)
    at defaultTriggerAsyncIdScope (node:internal/async_hooks:464:18)
    at afterDns (node:dgram:659:5)
    at processTicksAndRejections (node:internal/process/task_queues:84:21)
poul@PZW2-80:~ $ 


8 Sep 06:02:09 - [red] Uncaught Exception:
8 Sep 06:02:09 - [error] Error: send ENETUNREACH 224.0.0.251:5353
    at doSend (node:dgram:717:16)
    at defaultTriggerAsyncIdScope (node:internal/async_hooks:464:18)
    at afterDns (node:dgram:663:5)
    at processTicksAndRejections (node:internal/process/task_queues:83:21)
poul@PZW2-80:~ $ 

===================

8 Sep 09:28:14 - [info] Node-RED version: v3.1.0
8 Sep 09:28:14 - [info] Node.js  version: v20.5.1
8 Sep 09:28:14 - [info] Linux 6.1.21-v7+ arm LE
8 Sep 09:28:17 - [info] Loading palette nodes
8 Sep 09:28:22 - [info] Dashboard version 1.0.2 started at /ui
8 Sep 09:28:28 - [info] Settings file  : /home/poul/.node-red/settings.js
8 Sep 09:28:28 - [info] Context store  : 'default' [module=memory]
8 Sep 09:28:28 - [info] User directory : /home/poul/.node-red
8 Sep 09:28:28 - [warn] Projects disabled : editorTheme.projects.enabled=false
8 Sep 09:28:28 - [info] Flows file     : /home/poul/.node-red/flows.json
8 Sep 09:28:28 - [info] Server now running at http://127.0.0.1:1880/
8 Sep 09:28:28 - [warn]
2

If I was trying to figure this out, I would search the forum using 'dgram' and look at the topics that come up. If that didn't help I would:

  1. start NR in safe mode (node.red --safe)
  2. export the flow
  3. edit the flow.json and search for the IP address
    if found you could determine what node was involved

if not found I would

  1. start NR in safe mode (node.red --safe)
  2. disable all the flow tabs and deploy.
  3. enable the first flow tab and deploy
    if the error occurs, it is probably a node in that tab

If it doesn't occur

  1. enable the next flow tab and deploy if the error occurs, it is probably a node in that tab. If it doesn't occur repeat this step.
3

What does that mean? Writing home to where? Do you think Node-RED is gathering data and trying to dial home? (it is not!)

That is a IPV4 multicast group IP.

That will be generated by a contrib node doing UDP multicast. Something like Alexa or Google Home.

4

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