Kerio Control Web Filter Is Not Activated Categorization Is Disabled Fixed -

: Using Google DNS (8.8.8.8) can sometimes cause authorization failures with Zvelo URLs. It is recommended to use: Cloudflare : 1.1.1.1 OpenDNS : 208.67.222.222 or 208.67.220.220 .

He verified the subscription was active. It was. : Using Google DNS (8

Note: Do not restrict the firewall itself with strict content filtering rules. Step 5: Restart the Web Filter Service via SSH It was

The Web Filter module license is either missing, mismatched, or expired. Step-by-Step Fixes Fix 1: Modify the Reliability Check via SSH Step-by-Step Fixes Fix 1: Modify the Reliability Check

Kerio downloads a local copy of the categorization database. If that database is outdated or corrupt, forcing a fresh download helps.

The Kerio Control Web Filter relies on a cloud-based categorization database (powered by Kerio's security partners, such as Cyren or Webroot, depending on your version). When the Kerio Control appliance cannot validate its license or connect to the cloud categorization servers, it disables the web filter entirely to prevent system instability. Root Causes of the Activation Failure

| FQDN | Port | Purpose | |------|------|---------| | licensing.gfi.com | 443 | License validation | | brightcloud.kerio.com | 443 | URL categorization updates | | ocsp.digicert.com | 80/443 | Certificate revocation (HTTPS inspection) |