| Agent Control Port | Used for the communication between an Initiator Agent and a Helper Agent. | 2088, 2089 | Changed in Coordinator Settings only. |
| Coordinator Utility Port | Used for the communication between the Coordinator and the Initiator and Helper Agents, for transferring system information and status about the machines that host the Agents. | 9953 | Must be changed in both Coordinator Settings and each Agent’s Settings. |
| Coordinator Session Port | Used for the communication between the Coordinator and an Initiator Agent | 9952 | Change in Coordinator Settings only. |
| Agent Webserver Port | Used for the communication between your browser and the Web Management Console of the Agents. | 8080 | Change in each Agent’s Settings only. |
| HTTPS Webserver Port | Used for secure communication between your browser and the Web Management Console of the Agents. | 8081 | Change in each Agent’s Settings only. |
| Secondary Coordinator Port | Used to connect from the Secondary Coordinator to the Primary Coordinator. To modify the port, see Secondary Coordinator. | 9954 | Change in Coordinator Settings of Primary Coordinator |
| Internal Coordinator Port | Required by RabbitMQ, which is used by Incredibuild. | 4369 | Cannot be changed at all (even during installation) |
| Message Transport Port | Used for internal communication in the Coordinator. Only required for communication between Incredibuild components inside the Coordinator machine. | 5672 | Cannot be changed after installation. |