To make sure the web filter is working, attempt to access a categorized website (e.g., a gaming site) while a rule is set to block that category. If you see the Kerio Control blocked webpage notification, the issue is resolved. Proactive Management Tips
The new AI-powered grading platform, "GradeSwift," went down. Every teacher in the building lost their progress reports. The cause? Without bandwidth categorization, a single student’s background torrent client (which he thought he’d closed) opened 8,000 concurrent connections to a seedbox in Luxembourg. Kerio, confused, treated the torrent packets with the same priority as the principal’s Zoom call with the district superintendent. To make sure the web filter is working,
: You can still block explicit domains by adding specific hostnames manually under Content Filter > Content Rules . Learn more from the GFI Blocking Unwanted Sites Guide . Every teacher in the building lost their progress reports
Thus, the message is not a warning—it is a functional shutdown of category-based filtering. Kerio, confused, treated the torrent packets with the
If the Web Filter shows as "not activated" even with a valid license, Kerio may have disabled it due to detected unreliability (e.g., more than 10 failed DNS check queries in one minute). To force-enable the service and bypass reliability checks:
: Connect to your Kerio device via SSH (e.g., using PuTTY ). Run these commands :
cd /opt/kerio/winroute ./tinydbclient "update SiteFilter set DetectReliability=0" /etc/boxinit.d/60winroute restart Use code with caution.