: Navigate to the core directory and modify the internal database by entering the following strings:
Ensure the filter hasn't simply been toggled off in the WebAdmin interface: Navigate to Content Filter Applications and Web Categories Enable Kerio Control Web Filter is checked and click GFI Support Are you seeing specific DNS response timeout errors in your logs, or is the license itself showing as
Newer versions of Kerio Control include updated root CAs required for secure communication with the Web Filter cloud.
Ensure the in /opt/kerio/winroute/winroute.cfg is correctly set to v4.url.zvelo.com . Verification Steps Go to Content Filter > Applications and Web Categories . Ensure Enable Kerio Control Web Filter is checked. : Navigate to the core directory and modify
SSL certificate validation for HTTPS calls to GFI servers will fail if the system clock is off by more than a few minutes.
// 获取并刷新 URL 分类数据库的最新状态 api.post("settings/control/webFilter/getCategories");
Look for:
This typically happens because:
Redirect all DNS queries to a service like OpenDNS FamilyShield ( 208.67.222.123 and 208.67.220.123 ) or Cloudflare Gateway. This provides category-based filtering outside Kerio Control.
The Web Filter is a premium add-on component. If you run an unregistered or trial deployment, the component turns itself off 30 days after installation. Open the administrator dashboard. Go to > License Details . Ensure Enable Kerio Control Web Filter is checked
feature in this same tab to report the miscategorization to Zvelo support.keriocontrol.gfi.com
希望这篇详尽的故障排查指南能帮助您快速解决当前困境，并加强未来的网络防御能力。面对棘手的网络问题时，请记住：大多数系统行为的背后都有其设计的逻辑，它并非难以捉摸的“玄学”，而是可以通过科学的方法进行剖析与解决的工程学问题。
Some possible causes of this issue include: This provides category-based filtering outside Kerio Control