Depending on your operating system and deployment scale, you can apply the offline key using several methods. Method 1: Using the Desktop Graphical User Interface (GUI)

: Devices do not need to call home to the RealVNC cloud to verify their license status. Direct Connectivity Only : When using an offline license, you are limited to Direct Connections (via IP address or hostname). Cloud Connectivity (brokered connections) is disabled by design. Deployment Options

| Feature | Standard Online Key | Offline/Perpetual Key | | :--- | :--- | :--- | | Internet required for activation | Yes (must reach RealVNC license server) | No | | Subscription model | Monthly or annual | Typically perpetual | | Phone-home frequency | Every 30 days | Never | | Suited for air-gapped networks | No | Yes | | Requires license server software | No (cloud validation) | Optional (on-prem license server) |

Remember that offline keys do not support cloud routing. Ensure your network firewalls allow traffic through the default RealVNC port ( 5900 ) and that your client machine can successfully ping the host's IP address. Best Practices for Offline License Management

"C:\Program Files\RealVNC\VNC Server\vnclicense.exe" -add YOUR-OFFLINE-LICENSE-KEY-HERE Use code with caution. sudo vnclicense -add YOUR-OFFLINE-LICENSE-KEY-HERE Use code with caution. macOS (Terminal):

In conclusion, a RealVNC offline license key is a valuable asset for anyone who requires a reliable and secure remote access solution. With an offline license key, you can unlock the full features of RealVNC, use the software anywhere, anytime, and ensure that your remote connections are secure and protected.

Choose the option to activate using a instead of signing into a RealVNC account. Enter or paste your 25-character offline license key.

Run the command to check license status on each machine:

:

Where OFFLINELICENSE is the path to your license file.

Highly secure environments with zero inbound or outbound internet access to prevent data exfiltration.

Offline keys disable all cloud-dependent functionality. To bridge connections across different networks without the cloud, you must configure direct IP-to-IP connections, port forwarding, or a VPN tunnel. Security Best Practices for Air-Gapped Networks

Navigate to the following registry path: HKEY_LOCAL_MACHINE\SOFTWARE\RealVNC\vncserver Create or modify a named LicenseKey . Paste your offline license key as the value data. Restart the RealVNC Server service to apply the change. Troubleshooting Common Offline License Issues

Before you can use an offline license key, you must meet specific licensing requirements set by RealVNC:

Since the machine is offline, you must retrieve the key from a separate device that has internet access: Log in to your RealVNC Account Navigate to the Deployment Subscriptions Look for the Offline Licensing Legacy VNC 5.x/6.x Keys to get your 25-character alphanumeric code (e.g., XXXXX-XXXXX-XXXXX-XXXXX-XXXXX 3. Applying the Key to the Offline Machine