The TCP socket going away was an accidental byproduct of the networking changes, it is still there but you cannot at present reach it. It was not intended to be a permanent feature though, and will probably go away in a few weeks when Windows no longer needs it. We may add an https socket at some point, unconfirmed. I think you are best off using socat or running tools in a container, or using a container to forward the socket to localhost (ie socat in a container with published port) until Java is fixed to be able to understand sockets. There will be the same issue on Windows as new docker uses a named pipe there.