Which ports need to be open for a GroundRunner?
The OneCloud GroundRunner does not require any ports to be open. During the installation, by default, the GroundRunner will listen on port 8821 for communication between GroundRunners. It is optional to have this open, and only necessary if you want GroundRunners on different servers to be able to share command outputs inside your corporate network. You can also adjust the port used via the GroundRunner configuration file in the installation directory.