Slackware 14.2 64-bit, VirtualBox 5.2.34, Extension Pack installed and reinstalled.

I am unable to connect to any VMs using the VBox RDP. The option is enabled with the default port 3389. Only one VM is running at a time. Both Remmina and rdesktop fail to connect.

Remmina shows nothing in the debug log. rdesktop spits out ERROR: Connection closed. nmap shows port 3389 open when a VM is running and closed when the VM is off. Disabling the local firewall has no effect.

RDP works fine at work although there we are using 5.1.38.

Any ideas?

Thanks again.

Edit: Updating rdesktop to 1.9.0 spews a different message: Core(error): rcp_recv(), connection closed by peer

Edit: I compiled 5.2.36 and 6.1.2. No change. RDP just doesn't work for me anymore. At this point I'm guessing PEBKAC but don't know what I might be overlooking.

Well, Hell.

The reason RDP no longer functioned is some months ago I mindlessly changed the default VirtualBox remote desktop extension (VRDE) to VNC. To toggle the VRDE:

Well, here's another nice mess you've gotten me into.

PEBKAC indeed. Now, what the Hell was I doing several hours ago before I wandered down this rabbit hole?