UDP port listening


I recently noticed that rocket chat node process opens periodically some random high UDP port for listening. Why It’s doing such things? It’s normal behavior?

for example is something like this:
tcp* 1431/node
udp* 1431/node

and this port will close after short period of time, and some time later node again open udp socket with random port.

Server Setup Information

  • Version of Rocket.Chat Server: 4.6.1
  • Operating System: Ubuntu 18.04
  • Deployment Method: tar
  • Number of Running Instances: 1
  • DB Replicaset Oplog: 1
  • NodeJS Version: 14.18.3
  • MongoDB Version: 4.2.19
  • Proxy: haproxy
  • Firewalls involved: no