Administrators can retrieve feature keys through several manual or automated interfaces depending on the management tool used. Manually Add or Remove a Feature Key - WatchGuard
When an administrator initiates a "Download Feature Key" request, the Firebox initiates an outbound secure connection (typically over HTTPS) to WatchGuard’s backend licensing servers.
The feature key provides a clear, line-by-line breakdown of exactly what is licensed and—more importantly— when it expires
: Many newer versions of Fireware OS require a current feature key with an active support subscription to complete the upgrade. Method 1: Automatic Synchronization (Recommended)