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| Name and release | Platforms | Encryption | Session model | Runs as a service | Operator provides |
|---|---|---|---|---|---|
RealVNC ConnectServer component
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Full control: Windows, macOS, Linux, Raspberry Pi OS. Mobile Server on iOS/iPadOS and Android is view-only. RealVNC Connect source | 128-bit AES by default (AlwaysOn); up to 256-bit AES end-to-end. Keep encryption enabled; AlwaysOff permits unencrypted direct connections. RealVNC Connect source | Not stated by vendor RealVNC Connect source | Yes. Persistent service mode keeps the Server available at the login screen. RealVNC Server modes source (external site) (accessed October 6, 2026) | Provide account sign-in and separate Server authentication. For cloud connections, both endpoints need access to RealVNC cloud services. For direct connections, manage routing, firewalls and local logs. Reapply an Enterprise offline license to every Server at renewal. RealVNC Connect source; RealVNC offline licensing source (external site) |
TigerVNCServer component
Sources accessed October 5, 2026. |
Linux/Unix. Windows winvnc ships but is upstream-unmaintained and may not function correctly. No macOS server is listed. TigerVNC source; TigerVNC platform source (external site) | Xvnc defaults to TLSVnc,VncAuth. TLSVnc is anonymous TLS without a certificate; X.509 types require explicit enabling and certificate files. TigerVNC source | Virtual X sessions (Xvnc), existing X displays (x0vncserver) and existing Wayland displays (w0vncserver). TigerVNC source; TigerVNC existing X display source (external site) | Not stated by vendor TigerVNC source (external site) | Install upstream or distribution updates, configure firewalls and tunnels, and set a VNC password. Enable X.509 or Plain/PAM explicitly when needed. TigerVNC source |
TightVNCServer component
Sources accessed October 5, 2026. |
Windows. TightVNC source | Session traffic is unencrypted; use a tunnel on untrusted networks. TightVNC source (external site) | Shares the desktop of the Windows host. TightVNC source | Yes, as a Windows service. TightVNC source | Set Primary and View-only passwords, control exposure with a tunnel or trusted network, and install current releases. TightVNC source |
TurboVNCServer component
Sources accessed October 5, 2026. |
Linux/Unix, including FreeBSD; no Windows or macOS server. TurboVNC source (external site) | TLS and X.509 security types are available, alongside VNC password, OTP and UnixLogin types. TurboVNC source (external site) | Virtual X sessions, one isolated desktop per user. TurboVNC source (external site) | Not stated by vendor TurboVNC source (external site) | Choose and configure security types and PAM authentication. Control exposure for each session port or bind to localhost for SSH tunneling. Update from GitHub Releases or the official YUM/APT repositories. TurboVNC source (external site) |
UltraVNCServer component
Sources accessed October 5, 2026. |
Windows. UltraVNC source | Optional encryption through a configured DSM plugin; the Server default has no DSM plugin. UltraVNC source | Shares the screen of the Windows host; Single Click is a preconfigured server that runs without installation. UltraVNC source | Not stated by vendor UltraVNC source (external site) | Configure a DSM plugin or tunnel, authentication and exposure controls. Keep any repeater reachable from both endpoints and apply updates from uvnc.com. UltraVNC source |
x11vncServer component
Sources accessed October 5, 2026. |
Linux/Unix; the README also lists FreeBSD, Solaris, HP-UX, AIX and native Mac OS X Aqua/Quartz. x11vnc source (external site) | Built-in SSL/TLS and VeNCrypt; configure the transport explicitly. x11vnc source (external site) | Shares an existing X display; terminal-services mode can create virtual X sessions with Xvfb. x11vnc source (external site) | Not stated by vendor x11vnc source (external site) | Configure authentication: x11vnc runs without a password unless one is supplied. Control exposure using localhost binding, an allow list and SSL or a tunnel. The project has no maintainer and publishes source releases; updates depend on distribution packages. x11vnc source (external site); x11vnc authentication source (external site) |
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