RDP to Debian

Install xrdp.

sudo apt install xrdp

Now make sure to automatically start the service at the system startup.

systemctl enable xrdp

Then make sure that the service is running.

systemctl status xrdp

If you are running a firewall make sure you have put a allow rule in for the RDP port.

ufw allow 3389/tcp

Note You have to configure the polkit rule to avoid an authenticate popup after inputting the username and password at the xrdp login screen on windows.

vim /etc/polkit-1/localauthority.conf.d/02-allow-colord.conf 

polkit.addRule(function(action, subject) {
if ((action.id == “org.freedesktop.color-manager.create-device” || action.id == “org.freedesktop.color-manager.create-profile” || action.id == “org.freedesktop.color-manager.delete-device” || action.id == 
“org.freedesktop.color-manager.delete-profile” || action.id == “org.freedesktop.color-manager.modify-device” || action.id == “org.freedesktop.color-manager.modify-profile”) && subject.isInGroup(“{group}”))
{
return polkit.Result.YES;
}
});

Restart the xrdp service.

systemctl restart xrdp