Kerio Control Web Filter Is Not Activated Categorization Is Disabled Work Jun 2026

Indirectly. HTTPS filtering (SSL inspection) is separate. However, if categorization is disabled, you cannot block HTTPS sites based on category, even if SSL inspection is on.

: It is highly recommended to use Cloudflare (1.1.1.1) or OpenDNS (208.67.222.222) as custom DNS servers for *.zvelo.com URLs.

Go to or Web Filter → Upstream Proxy (version dependent).

Ensure that you have a rule created, it is enabled, and it includes the action.

Once the web filter is active again, implement these best practices: Indirectly

Ensure email alerts are configured in GFI Kerio Control to notify you 30 days before license expiration.

Before proceeding with troubleshooting, it's helpful to clarify one common source of confusion. The error message can sometimes be triggered inadvertently by the "Categorize each page regardless of URL rules" setting. Administrators may see the error and worry that the entire Web Filter has failed. If this is your situation, it's important to know that this specific setting affects the of the visited web pages categories. While the Web Filter will still categorize pages for content rules, you can safely disable this option if you are not using the statistics feature.

Since the Web Filter relies on external servers, ensure your Kerio Control appliance can reach them.

feature in the same tab to see if a website is correctly categorized (e.g., "Social Networks"). Check Rules : Ensure your Content Rules (under Content Filter Content Rules : It is highly recommended to use Cloudflare (1

Verify the DiaServerUrl value is set to v4.url.zvelo.com in the winroute.cfg file. 3. Disable Reliability Detection

Have there been any recent in your environment?

The Web Filter component is a separate subscription from the base Kerio Control license. If it expires, categorization stops instantly.

Leo shrugged. That was the goal, right?

Monitor the subscription status to avoid abrupt service shutdowns.

I can provide specific commands or steps based on your current setup. Share public link

Avoid relying on URL categories until the activation error on the dashboard status page changes back to a green "Active" state. If you want to troubleshoot this further, let me know: What of Kerio Control are you currently running?