In gorgon.json, you can change how files are uploaded from Originator to File Server and downloaded from File Server to Listeners. This setting is "rsync_transport" which could be either "ssh" or "anonymous"
If you are using this setting, originator and all listeners should have SSH passwordless access to File Server. You can follow these steps to setup SSH login without password.
If you are using this setting, you need to run the following in the File Server:
mkdir -p ~/.gorgon/file_dir # here is where gorgon will push files under test
gorgon start_rsync ~/.gorgon/file_dir