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VirtualBox guest RDP authenticiation

RDP authentication For each virtual machine that is remotely accessible via RDP, you can individually determine if and how client connections are authenticated. For this, use VBoxManage modifyvm command with the --vrdeauthtype option; see the section called “VBoxManage modifyvm” for a general introduction. Three methods of authentication are available: The "null" method means that there is no authentication at all; any client can connect to the VRDP server and thus the virtual machine. This is, of course, very insecure and only to be recommended for private networks. The "external" method provides external authentication through a special authentication library. VirtualBox ships with two such authentication libraries: The default authentication library, VBoxAuth, authenticates against user credentials of the hosts.…
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