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I have a CentOS 7 installation running Virtualbox 5.1.8, and the Oracle VM Virtualbox Extension Pack 5.1.8 is also installed. I have a few guests (CentOS as well) running and I would like to access one of them via RDP with external authentication.
So I enabled the VRDP server, and I can't seem to connect, not from the host machine (localhost) nor from a different Windows machine. It simply seems to time out.
However, if I set the authentication method to null, it works perfectly fine. But I don't want to use null authentication.
Is there something I'm missing?
EDIT: I just noticed that if I select null authentication, I can only login via localhost, not from an external machine, which is even more strange...