NOTE: It is possible you may not see a password prompt. If you have previously used VNC, the new process will sometimes use your previous session password. If you have forgotten your previous session password, run the command vncpasswd to change it. Your VNC session has been created, and you should see a message similar to the sample output below. The number that appears after the host address is the display number it is underlined in red in the image above.
For example, if your display number is 4, your port number is If your display number is 12, your port number is NOTE: Your display number may not be the same as the sample image above. Make sure to read the output message in your terminal and look for the number after the semicolon for your true display number. You can exit and close this terminal if you want, as the VNC session will continue to run in the background. In MobaXterm, click on the Session button in the upper left hand corner.
No Account? Sign up. By signing in, you agree to our Terms of Use and Privacy Policy. Already have an account? Sign in. By signing up, you agree to our Terms of Use and Privacy Policy. Enter the email address associated with your account. We'll send a magic link to your inbox. Email Address. You can remotely launch a graphical application on a RHEL server and use it from the remote client. The option is enabled by default in RHEL. Your organization might have disabled it.
Chapter 5. Accessing the desktop remotely. Depending on the session type, this method uses different components to implement screen sharing: In an X11 session, it uses the vino component.
Remotely accessing the desktop as a single user. Navigate to the Sharing menu: Click Screen Sharing. The screen sharing configuration opens: Click the switch button in the window header to enable screen sharing: Select the Allow connections to control the screen check box. Under Access Options , select the Require a password option. The desktop sharing is enabled on the server.
For details, see Section 5. Click Connect. In the Protocol menu, select VNC. Verification steps On the client, check that you can see the shared server desktop.
On the server, a screen sharing indicator appears on the right side of the top panel: You can control the screen sharing in the system menu. For example: On the client, configure the port forwarding: ssh -N -T -L server-ip-address Connect to the VNC session on the localhost address. Remotely accessing the desktop as multiple users.
The mapping of port and display numbers to users in VNC. The recommended mapping Red Hat recommends that you start with port number and display number 2 for the first user, and increment the numbers by one for each additional server user.
Table 5. Firewall rules You must open the selected ports in your firewall configuration. Once PuTTY is downloaded and installed, the first step is to establish a secure connection between the Windows system and the remote RHEL 8 system with appropriate tunneling configured.
When launched, PuTTY displays the following screen:. Enter the IP address or host name of the remote host or the external IP address of the gateway if you are connecting from outside the firewall.
The next step is to set up the tunnel. The screen should subsequently appear as follows:. Enter as the Source port and localhost as the Destination and click on the Add button. Finally return to the main screen by clicking on the Session category. Enter a name for the session in the Saved Sessions text field and press Save.
Click on Open to establish the connection. A terminal window will appear with the login prompt from the remote system. Enter the appropriate user login and password credentials. In order to shut down a VNC Server hosted desktop session, use the —kill command-line option together with the number of the desktop to be terminated. For example, to kill desktop With so much happening in the background, VNC can sometimes seem opaque, particularly when problems arise and the server either fails to start, or attempts to connect remotely result in error messages.
There are, however, a number of techniques for tracking down and resolving VNC problems:. If the VNC service fails to start, check the systemctl status of the service and check for error messages:. If the systemd VNC service is still unable to start the VNC server, try starting it manually using the following command:. Check the output and log file for any errors that may help identify the problem. If the server starts successfully, try connecting again with a VNC viewer.
One area of weakness in the vncconfig. If the VNC server appears to be running but attempts to connect from a viewer fail, it may be worth checking that the correct firewall ports are open. Begin by identifying the default zone as follows:.
Comprising the VNC server running on the remote server and a corresponding client on the local host, VNC allows remote access to multiple desktop instances running on the server. When the VNC connection is being used over a public connection, the use of SSH tunneling is recommended to ensure that the communication between client and server is encrypted and secure.
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