Martin - I think you are on the right track. SSH was indeed disabled in CUCM. I re-enabled it, however neither SSH or SCP work. I should also note that I confirmed on the endpoint that SSH was turned on... however it still just says "connection refused" when I try to connect to it. I can connect OK with Telnet once I manually enable it on the endpoint.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.