Designate one internet-connected machine (perhaps a locked-down laptop) solely for generating request/response file transfers. This reduces cross-contamination risks for air-gapped networks.
A RealVNC offline license key (also known as a "disconnected license" or "offline activation key") is a specialized product key that allows you to activate RealVNC software on a computer or server that has no internet access. Unlike standard online activation, which communicates directly with RealVNC’s licensing servers, offline activation relies on a manual, file-based process. realvnc offline license key
Not all RealVNC editions support offline licensing: To comply with regulations like PCI-DSS or SOX,
| Edition | Offline Supported? | Key type | | :--- | :--- | :--- | | VNC Connect (free) | No | N/A | | VNC Connect Professional | No (online only) | N/A | | VNC Connect Enterprise | Yes (via offline license request) | Perpetual or site | | VNC Server for Windows (legacy) | Yes (older v6.x) | Perpetual key | | RealVNC for Industrial/Embedded | Yes | Signed offline license file | offline activation relies on a manual
Recommendation: Purchase VNC Connect Enterprise (minimum 5 licenses) or RealVNC Embedded.
"license_type": "Enterprise_Offline",
"machine_fingerprint": "a7f3e8c2...",
"issued": "2025-04-01",
"valid_until": "2026-04-01",
"seats": 5,
"signature": "abcd1234..."
To comply with regulations like PCI-DSS or SOX, financial servers may be isolated. Offline RealVNC allows support teams to troubleshoot without introducing web-based vulnerabilities.
Cause: Offline node-locked keys are tied to the first network adapter’s MAC.
Fix: If you replaced a failed NIC or motherboard, contact RealVNC support to rehost the key (typically allowed once per year).