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Fixing VNC Viewer Encryption Issue on Ubuntu: Unable to Connect

Ubuntu 21

In this article, we will delve into the issue of encryption that often occurs when trying to connect to Ubuntu using VNC Viewer. We will provide step-by-step instructions on how to fix this issue without having to disable encryption on the server side.

Quick Answer

To fix the VNC Viewer encryption issue on Ubuntu, you can either use dconf-editor to modify the encryption settings or modify the encryption settings directly in RealVNC Viewer. Both solutions allow you to connect without encryption, but it’s recommended to use additional security measures like SSH tunneling for a secure connection.

Introduction

Virtual Network Computing (VNC) is a graphical desktop sharing system that allows you to control one computer remotely from another. However, sometimes when trying to connect from RealVNC VNCViewer to Ubuntu, you may encounter an encryption issue that prevents the connection. This can be frustrating, but fortunately, there are ways to fix this issue.

Solution 1: Using dconf-editor

The first solution involves using dconf-editor to modify the encryption settings.

Step 1: Install dconf-editor

You can install dconf-editor on your Ubuntu desktop by running the following command in your terminal:

sudo apt-get install dconf-editor

This command uses the apt-get package handling utility to install dconf-editor. The sudo prefix runs the command with root privileges.

Step 2: Modify Encryption Settings

Once dconf-editor is installed, open it and navigate to org.gnome.desktop.remote-desktop.vnc.

Here, you’ll find an array value that you need to edit. Specifically, you need to include 'none' as one of the options. This allows the VNC Viewer to connect without encryption.

Step 3: Save Changes

After adding 'none' to the array value, save the changes and exit dconf-editor.

Step 4: Use SSH Tunneling

For added security, you can use SSH tunneling when connecting. This provides an extra layer of encryption, even when the VNC connection is not encrypted.

Solution 2: Modify Encryption Settings in RealVNC Viewer

The second solution involves modifying the encryption settings directly in RealVNC Viewer.

Step 1: Install RealVNC Viewer

First, install RealVNC Viewer 6.19 on your Windows 10 tablet.

Step 2: Modify Encryption Settings

Open RealVNC Viewer and select the connection you want to modify. In the “General” tab, under “Encryption,” set it to “Prefer off” or “Let VNC Server Choose.” This allows the VNC Viewer to connect even if the server does not support encryption.

Step 3: Save Changes

After modifying the encryption settings, save the changes and try connecting to Ubuntu again.

Conclusion

If neither of the above solutions work, it is possible that there may be other configuration issues or compatibility problems. In such cases, it is recommended to consult the official documentation or support channels for RealVNC Viewer and Ubuntu for further assistance.

Remember, while these solutions allow you to connect without encryption, it’s always a good idea to use additional security measures, such as SSH tunneling, to ensure your connection is secure.

What is VNC Viewer?

VNC Viewer is a graphical desktop sharing system that allows you to control one computer remotely from another.

Why am I encountering an encryption issue when connecting to Ubuntu using VNC Viewer?

The encryption issue occurs because the default encryption settings in VNC Viewer may not be compatible with the encryption settings on the Ubuntu server.

Can I disable encryption on the Ubuntu server to fix the issue?

It is not recommended to disable encryption on the server side, as it compromises the security of your connection. However, there are alternative solutions to fix the encryption issue without disabling encryption.

How can I fix the encryption issue using dconf-editor?

To fix the encryption issue using dconf-editor, you need to install dconf-editor on your Ubuntu desktop, modify the encryption settings in the org.gnome.desktop.remote-desktop.vnc section, and include 'none' as one of the options. You can also use SSH tunneling for added security.

How can I modify the encryption settings in RealVNC Viewer?

To modify the encryption settings in RealVNC Viewer, you need to install RealVNC Viewer 6.19 on your Windows 10 tablet, open the software, select the connection you want to modify, and set the encryption to "Prefer off" or "Let VNC Server Choose."

What if the above solutions do not work?

If the above solutions do not work, there may be other configuration issues or compatibility problems. In such cases, it is recommended to consult the official documentation or support channels for RealVNC Viewer and Ubuntu for further assistance.

Should I use additional security measures when connecting without encryption?

Yes, it is always a good idea to use additional security measures when connecting without encryption. One such measure is to use SSH tunneling, which provides an extra layer of encryption for your connection.

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