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How do I change the UCP Controller Port?

By default UCP listens on port 443.  To change the port UCP is listening on, navigate in the Web UI to Admin Settings > Cluster Configuration > Controller Port.  This setting was introduced in UCP 2.0.0 and can only be changed through the Web UI.  Applying a change to this setting will result in UCP controllers restarting and may briefly interrupt UCP availability.  If using a load balancer for UCP, the load balancer will also need to be reconfigured to accommodate this change.