I created a VM instance on Oracle Cloud, using Oracle Linux 8.6. I added TCP 3389 port in VCN on OCI before installing GUI.
I want to install GUI and allow RDP connection to VM instance, so I installed GNome GUI and XRDP with the following commands (# is I use root user):
# dnf groupinstall "Server with GUI" -y
# systemctl set-default graphical
# reboot
Then uncomment the following line in the /etc/gdm/custom.conf file to ensure that VNC uses X.org instead of Wayland:
WaylandEnable=False
After that, I installed TigerVNC Server and XRDP:
# yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm -y
# yum install tigervnc-server xrdp -y
# systemctl start xrdp
# systemctl enable xrdp
# firewall-cmd --permanent --add-port=3389/tcp
# firewall-cmd --reload
Then, I proceeded to set the VNC password, configure VNC service and set up the VNC service as instructed on Oracle's document page.
Finally, I proceeded to connect to VM Instance via Remote Desktop Connection, but I received An authentication error has occurred. The function requested is not supportted:
After that, I revised the port field in the /etc/xrdp/xrdp.ini file into port=tcp://:3389 and then restarted the XRDP service via service xrdp restart command, then check the status of XRDP service through systemctl status xrdp command:
But when I tried to reconnect, the above error still happened. I conducted a check of XRDP service, and it appeared the following errors:
After that, I tried to change the ssl_protocols field in /etc/xrdp/xrdp.ini from ssl_protocols=TLSv1.2, TLSv1.3 to ssl_protocols=TLSv1, TLSv1.1 and then restart the XRDP service. Nothing changes, the same error still happens and the situation of XRDP service is the same!
Something is not right here, maybe I did something missing or was wrongly configured?
