: You cannot use "Cloud Connectivity" or "On-Demand Assist" with this file.
Once you have transferred the offline license string into your isolated network, you can apply it to your VNC Server endpoints using several different methods. Method A: Command-Line Interface (CLI) Deployment
[ License File (.lic/.txt) ] │ ▼ [ VNC Server Daemon/Service ] ──(Reads Cryptographic Signature) │ ▼ [ Local Public Key Verification ] ──(Validates Expiration & Seat Count) │ ▼ [ Full Enterprise Features Unlocked ] (No External Network Packets Sent)
Banking, healthcare, and financial institutions adhering to strict PCI-DSS, HIPAA, or GDPR boundaries that prohibit unauthorized outbound telemetry. vnc+offline+license+file+exclusive
Replace XXXXX-XXXXX-XXXXX-XXXXX-XXXXX with your exclusive offline license key. Method B: Graphical User Interface (GUI) If you are configuring a single machine manually: Open the dialog on the host machine.
This command installs VNC silently and applies the license simultaneously, making it ideal for SCCM or Group Policy deployments.
| Aspect | Online / Floating License | Exclusive Offline License File | |--------|--------------------------|-------------------------------| | Internet required | Yes, periodic check | No | | Concurrent usage | Counted by license server | Single machine only (exclusive) | | Machine transfer | Deactivate → reactivate | Manual re-license from vendor | | Security risk | License server spoofing | License file theft (mitigated by binding) | : You cannot use "Cloud Connectivity" or "On-Demand
Manufacturing robots and internal networks often operate on "Dark Sites." IT admins use bulk offline licensing via Windows MSI to roll out remote desktop support to thousands of isolated industrial terminals during maintenance windows.
Environments where outgoing network requests are prohibited.
Most of these solutions are distributed under the GNU General Public License (GPL) . This makes them free to use. However, this is not usually an "exclusive" commercial license. If your organization needs to modify the source code, embed it in a proprietary system, or receive dedicated enterprise support, you would need to purchase a commercial source code license. For example, TightVNC offers a perpetual, non-exclusive license for its source code, allowing integration into closed-source products. Similarly, UltraVNC offers commercial binary licenses for specific components, such as its Mirror Driver. However, native air-gap support is not typically a built-in feature of the open-source versions, making the configuration more complex. | Aspect | Online / Floating License |
Acquiring an exclusive offline license file typically requires an Enterprise-tier subscription. Because these licenses lack automated cloud-based usage tracking, vendors issue them through specialized corporate portals. Step 1: Document Your Host Identifiers
For enterprise IT teams managing hundreds of offline machines, manual activation is not feasible. You can embed the offline license directly into the MSI installer using the transform property OFFLINELICENSE .