If you have been provided with an exclusive license file, follow these steps to activate your VNC Server without internet access:
Most commercial VNC software has a "grace period." If the software cannot phone home for 30–90 days, it enters a reduced-functionality mode (e.g., view-only access only, or disables file transfer). In a SCADA environment where a technician is managing a remote power substation, losing file transfer capabilities mid-maintenance is a critical failure. vnc+offline+license+file+exclusive
Pro tip: When buying licenses, negotiate "3 hardware migrations per year" into the contract. If you have been provided with an exclusive