Vnc+offline+license+file+exclusive

eliminates this requirement. The software never sends a handshake, never pings an API, and never requires a firewall port to vendor domains. This is essential for:

Pro tip: When buying licenses, negotiate "3 hardware migrations per year" into the contract. vnc+offline+license+file+exclusive

You can apply the license using either a graphical interface or the command line utility vnclicense Applying an offline license to RealVNC Connect eliminates this requirement