Kerio Control Offline License File < 2026 >

: Best for systems with restricted or no internet access for security reasons.

When a license is purchased or renewed, it must be registered with GFI's licensing servers. For environments with a stable internet connection, this process happens automatically. The offline license file is the mechanism that allows you to complete the registration and activation process on a completely isolated firewall.

I’ve seen a few questions recently about activating Kerio Control (now GFI Kerio Control) on machines that don’t have direct internet access. If your firewall is in a high-security or air-gapped environment, the online activation will fail. Here’s how to use the method. Kerio Control Offline License File

Click (or Update license info if updating an existing instance).

The offline license was generated for a different physical appliance or virtual machine instance. : Best for systems with restricted or no

After downloading the file, transfer it to a device (like a laptop) that can access the Kerio Control administration web interface.

If your appliance is in a restricted environment, you must first generate the file from a machine with internet access: Visit the Registration Portal : Go to the official Kerio Product Registration page Enter License Details : Provide your purchased Server License Number and complete the CAPTCHA. Confirm Information The offline license file is the mechanism that

An offline license file for Kerio Control is a .key file that allows you to activate the firewall software without requiring the instance to have a direct internet connection. This is essential for secure, air-gapped environments or deployments with restricted external access where the standard automatic online registration cannot reach GFI’s servers. Phase 1: Acquiring the License Key File

Navigate to > Accounting and Billing > License . Click on the Install License button.