Here’s a concise troubleshooting guide to resolve this:
Once the web filter is active again, implement these best practices:
This issue typically occurs when Kerio Control loses connectivity to its categorization servers (Zvelo) or fails internal reliability checks. Quick Fixes
By following these recommendations, organizations can ensure a more secure and controlled online environment.
To resolve the issue, follow these step-by-step troubleshooting instructions: Here’s a concise troubleshooting guide to resolve this:
Kerio Control Web Filter Not Activated: Categorization is Disabled Work
Guide you through for the zvelo servers.
Support may provide a hotfix or confirm a known bug.
Sometimes, internal security rules inadvertently block the firewall's own outbound update traffic. Navigate to . Support may provide a hotfix or confirm a known bug
Did this error start happening ?
He was the sysadmin at a small, progressive high school, "The Horizon Academy." The school board had just approved a "responsible digital citizenship" curriculum, which meant Leo was supposed to disable the old, draconian web filter. Their theory: teach kids to self-regulate, not just block them. Leo’s job was to make the network functional but unfiltered.
The Web Filter is a separate paid module. In the WebAdmin, go to to ensure "Kerio Control Web Filter" is still active.
: A simple reboot of the Kerio Control appliance or a manual restart of the winroute service via SSH often restores functionality if the issue was a temporary timeout. If you'd like, I can: Did this error start happening
If the message persists, the system logs will pinpoint whether the failure is due to an authentication token issue or an unreachable server. Go to the section on the left-hand menu.
If you want to dive deeper into a specific step, let me know:
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If categorization is disabled, the issue usually stems from one of four areas:
: Update your DNS configuration to use reliable third-party servers like Cloudflare (1.1.1.1) or OpenDNS (208.67.222.222) for *.zvelo.com URLs.
Follow these steps to restore web categorization functionality. 1. Check Your Subscription Status