The Web Filter uses an external service (Zvelo) which requires a valid authorization token. These tokens expire every . If your DNS settings prevent the token from renewing, categorization will be disabled.
If the filter is activated but still blocking legitimate sites, you can bypass the categorization engine for specific URLs. Using Kerio Control Web Filter
: Navigate to Configuration > DNS . Check Enable custom DNS forwarding and add a rule for *.zvelo.com to use Cloudflare (1.1.1.1) or OpenDNS (208.67.222.222) instead. 3. Fix Licensing and Activation Issues
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