1. Install xrdp on Ubuntu

                sudo apt update

                sudo apt install xrdp -y
                

Check the status

                sudo systemctl status xrdp
              

2. Install Desktop Environment (UI)

                sudo apt install xfce4
          

3. Configure xrdp Port (Optional)

Use a text editor, like nano, to edit the xrdp configuration file, xrdp.ini:

              sudo nano /etc/xrdp/xrdp.ini
              

Locate the port directive in the [Globals] section and set the desired value. In this example, the RDP port is 49952:

              port=49952

Press Ctrl+X, followed by y, and then Enter to save the changes and exit the file. Restart the xrdp server to apply the changes:

sudo systemctl restart xrdp

4. Open a Port for Incoming Traffic in ufw

Check the status of the ufw firewall:

sudo ufw status

If the firewall is inactive, use the following command to turn on ufw:

sudo ufw enable

Allow traffic on port 3389 or choose a different port for your RDP connection. The following command allows RDP connections on port 49952:

sudo ufw allow 49952/tcp

Reload the ufw firewall tool to apply the changes:

sudo ufw reload

5. Enable session

sudo nano /etc/xrdp/startwm.sh

add at the end of the above file

export GNOME_SHELL_SESSION_MODE=ubuntu
export XDG_CURRENT_DESKTOP=ubuntu:GNOME

restart the machine

reboot

OR

sudo shutdown -r now

5. Configure Remote Desktop Connection on Windows

              sudo apt-get purge firefox

              sudo apt-get install firefox

              xdg-settings get default-web-browser