Check for the absence of "Invalid authorization" or "Unable to categorize" entries.
Ensure your WAN interface has valid, working DNS servers (e.g., or ISP provided).
Before changing technical configurations, ensure your Web Filter subscription is valid. Log in to the . Navigate to Dashboard or Status > Subscription . Locate the Kerio Control Web Filter section.
If the Kerio Control web filter is not activated, and categorization is disabled, you may notice the following symptoms: Check for the absence of "Invalid authorization" or
"Invalid Authorization" errors can occur when using Google's DNS. It is recommended to use Cloudflare (1.1.1.1) OpenDNS (208.67.222.222) as custom DNS forwarding servers for *.zvelo.com Manual Re-activation Content Filter Applications and Web Categories Enable Kerio Control Web Filter is checked. to force a refresh. Verify License Status
Web Filter categorization disabled. Serial number: ko-197974
If you would like to troubleshoot further, let me know the of your Kerio Control firewall, or paste any specific error codes from your Error Log . Share public link Log in to the
: Temporary packet drops or slow internet lines trigger the firewall's reliability safety threshold.
Clear cache / reset web filter settings
%%MAGIT_PARSER_PROTECT%% 3. Run the internal database command to disable the reliability safety cutoff: %%MAGIT_PARSER_PROTECT%% bash./tinydbclient "update SiteFilter set DetectReliability=0" /etc/boxinit%%MAGIT_PARSER_PROTECT%% ```4. the Kerio Control appliance to apply the changes. Method 2: Configure Custom DNS Forwarding for Zvelo If the Kerio Control web filter is not
The error "categorization is disabled" indicated a total collapse of the intelligence layer. Without categorization, the Web Filter loses its decision-making context. Consequently, to prevent a total network blackout (blocking all traffic due to lack of data) or a security breach (allowing all traffic), the fail-safe mechanism forcibly deactivated the Web Filter module.
Ensure your upstream ISP modem or router isn't blocking traffic. Kerio Control requires open outbound access for: