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Notable Features

Security

• The TurboVNC Session Manager
  • Allows users to interactively choose a TurboVNC session to which to connect, as well as to remotely start and kill TurboVNC sessions
  • Starts TurboVNC sessions with a secure-by-default SSO (Single Sign-On) configuration, using SSH tunneling with automatic one-time password authentication
• Built-in SSH client
  • Supports OpenSSH config files
  • Supports password-less public key authentication using ssh-agent or Pageant
  • Built-in SSH key management
• Support for SSH tunneling using built-in or external SSH client
  • Direct or through an SSH gateway
  • Configurable external SSH client command-line templates
• Unix domain socket support
  • The TurboVNC Server can listen on a Unix domain socket instead of a TCP port.
  • The TurboVNC Viewer can use SSH tunneling to connect to a VNC server that is listening on a Unix domain socket.
• Allows security/authentication policies to be enforced for all TurboVNC users on a particular host
• TLS encryption support (VeNCrypt-compatible)
  • Strongly encrypts TurboVNC connections when not using SSH tunneling or the TurboVNC Session Manager
  • Supports anonymous TLS or X.509 certificates
  • TLS cipher suites and key lengths can be enforced using a per-host security/authentication policy.
• Authentication with one-time passwords or Unix login credentials
  • Can be used to share TurboVNC sessions with specific users, either with full or view-only credentials
• Built-in WebSockets support
  • Allows noVNC and other browser-based VNC viewers to connect to the TurboVNC Server without using a proxy
  • Supports TLS encryption (WSS) with X.509 certificates
• Configurable authentication failure mitigation
  • Blocks connections from an IP address for a specified period of time after a specified number of authentication failures from that IP address
  • Hardens TurboVNC sessions against brute force attacks when not using SSH tunneling or the TurboVNC Session Manager
• (Optional) Idle session timeout
  • Enforceable using a per-host security/authentication policy
• UltraVNC Repeater support (Mode I or II)
• Full support for IPv6
• Enterprise-friendly version management

Performance

• Advanced flow control and continuous updates
  • Allows the TurboVNC Viewer to receive framebuffer updates without specifically requesting them, which improves performance dramatically on high-latency connections
• Direct integration with VirtualGL
  • Enables GPU-accelerated OpenGL for an entire TurboVNC session
• DRI3 support (evolving feature)
  • Enables GPU-accelerated OpenGL and Vulkan for an entire TurboVNC session when using open source GPU drivers
• Lossless refresh
  • Allows the TurboVNC Server to send a mathematically or perceptually lossless copy of remote desktop regions that were previously sent using JPEG
  • Facilitates using image-quality-critical applications on networks that are too slow to support sending a high-quality image for every frame
  • Manual (when a hotkey is pressed) or automatic (if the user stops interacting with the TurboVNC session for a specified period of time)
• Accelerated/optimized Tight encoding/decoding
  • Multithreaded encoding
  • SIMD-accelerated JPEG encoding/decoding (using libjpeg-turbo)
  • SIMD-accelerated zlib encoding (using zlib-ng)
• Interframe comparison
  • Eliminates duplicate framebuffer updates
• Fine-grained control over the JPEG image quality and the level of chrominance subsampling
• Client-side double buffering
  • Reduces tearing artifacts in 3D and video applications

Usability

• High-performance feature-rich cross-platform VNC viewer
  • Maintains a different set of options for each unique VNC host
  • Uses the system's look & feel
  • Provides a toolbar for easy access to common features
  • Provides an application menu on macOS
• Seamless and automatic integration with popular window managers
• Remote desktop resizing
  • Automatic, based on the size of the TurboVNC Viewer window, or manual
• Direct integration with noVNC
  • Provides a zero-install viewer for TurboVNC sessions that works in any web browser (with reduced performance and features relative to the TurboVNC Viewer)
  • Built-in per-session web server
  • One-click noVNC URL generated for each TurboVNC session
  • Uses the TurboVNC Server's built-in WebSockets support
• Flexible and configurable full-screen/multi-screen support
  • Supports the full-screen application feature in OS X/macOS 10.7 "Lion" and later
  • Supports offset monitors and monitors with differing resolutions
  • Automatic (based on the remote desktop resolution) or manual selection of single-monitor or multi-monitor spanning of the TurboVNC Viewer window
  • Allows the user to remotely change the multi-screen layout of a running TurboVNC session or to specify a multi-screen layout when starting a session
  • Automatic desktop resizing chooses a server-side screen layout that honors the client's screen boundaries and taskbar/menu bar location.
• Remote extended input device support
  • Supports drawing tablets (Linux/Un*x and Mac clients) and touchscreen devices (Linux/Un*x clients)
  • Optionally maps X Input devices to a TurboVNC session when the TurboVNC Viewer connects from a Linux/Un*x client
  • Optionally creates persistent virtual X Input devices to emulate a Wacom drawing tablet
• Server-side key mapping
  • Maximizes compatibility with international keyboard layouts (including those with dead keys)
• Client-side remote desktop scaling
• Keyboard grabbing
  • Sends special keystrokes, such as Alt-Tab, to the VNC server
• UTF-8 clipboard transfers