Following https://help.dynatrace.com/dynatrace-managed/dynatrace-server/which-network-ports-does-dynatrace-ser... I have restricted access to port 443 to devices acessing the UI, and port 8443 to the machines where OneAgent is running.
Regarding port 8019, which type of connections are being terminated there? UI? OneAgent?
Solved! Go to Solution.
Sorry for the delay. It has to be open even in single node cluster.
The upgrade procedure runs a separate process that communicates with the server on 8019 port. So if it is closed, then upgrader process won't be able to send commands to server (for instance `shutdown`).
In multi-node cluster, the port is also used to synchronize communication between upgrade processes on different nodes.
Is that clear now? Let me know if you have further questions. I'll try to answer quicker 😉