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How do I start VNC server in user mode?

Published in VNC Server Configuration 3 mins read

To launch a VNC server in user mode, you typically execute the VNC server application directly from your current user session. This method ensures the VNC server operates within your active desktop environment, providing immediate access to your current display and user-specific settings.

Steps to Start RealVNC Server in User Mode on Windows

For users of RealVNC Server on a Windows operating system, starting a user mode instance is a straightforward process. This method ensures the VNC server runs under your current user account, allowing remote access to your active desktop session.

  1. Locate the VNC Server Executable: Navigate to the installation directory of RealVNC Server. The vncserver.exe application is typically found at:
    C:\Program Files\RealVNC\VNC Server\
  2. Run the Executable: Double-click on vncserver.exe to launch it. This action initiates a User Mode instance for the user account that executed the program.
  3. Maintain the Command Prompt Window: Upon execution, a Command Prompt window will open. It is crucial not to close this window, as doing so will stop the User Mode VNC server instance.

Quick Reference for RealVNC User Mode Startup

For a brief overview of the process:

Aspect Detail
Application vncserver.exe
Default Path C:\Program Files\RealVNC\VNC Server\
Mode Type User Mode (runs under the current user's session)
Important Note Do not close the associated Command Prompt window, or the server will terminate.

Understanding User Mode VNC

User mode, sometimes referred to as application mode, is a common way to deploy a VNC server. It differs from service mode (or system mode) by running as a regular application under a specific user's login, rather than as a background system service.

Benefits of User Mode Operation

  • Access to Active Session: Provides direct access to the graphical interface and applications running in the user's active session.
  • User-Specific Configuration: Inherits the current user's display settings, environment variables, and permissions.
  • Flexibility: Easy to start and stop without requiring administrative privileges (after initial installation).
  • Troubleshooting: Ideal for scenarios where you need to access exactly what the logged-in user sees.

Distinguishing User Mode from Service Mode

While user mode runs within a specific user's session, service mode allows the VNC server to run as a system background process, often starting before any user logs in. This enables access to the login screen and overall system management, but it may not always show the exact active user session without additional configuration. User mode is preferred when the goal is to access a currently logged-in user's desktop. For more general information on VNC technology, you can refer to VNC on Wikipedia.

General Considerations for VNC Server Setup

Regardless of the specific VNC server software, some general best practices enhance security and functionality:

  • Firewall Configuration: Ensure your operating system's firewall (e.g., Windows Defender Firewall) is configured to allow incoming connections on the VNC port (default is often 5900 or 5901 for the first display).
  • Security Best Practices:
    • Always use strong, unique passwords for VNC connections.
    • Consider using VNC servers that support encryption for session data.
    • Only allow connections from trusted IP addresses if possible.
  • Network Connectivity: Verify that the device running the VNC server is reachable from the client machine over the network. This might involve port forwarding on routers for remote access over the internet.

For further details on RealVNC products and their features, visit the RealVNC official website.