To prevent similar issues in the future, we recommend:
Observe the dashboard – the error should disappear within 2 minutes.
Once the underlying network communication pathways are restored, verify your active filtering configuration. To prevent similar issues in the future, we
当 Kerio Control 的 Web 过滤器因故停用时，企业不仅会失去对员工上网行为的管理能力，更会增加受到恶意网站攻击的风险。这虽然是一个令管理员头疼的难题，但通过本文的故障排查体系，您已经具备了解决它的完整能力。这套解决方案涵盖了从最简单的许可证检查到最复杂的 DNS 深度修复，无论您是初级网络管理员还是资深 IT 工程师，都能从中找到适合自己的解决路径。
If the error is caused by "Invalid Authorization," it is usually due to an expired or blocked security token: support.keriocontrol.gfi.com Configure DNS Forwarding : Ensure your firewall can resolve *.zvelo.com GFI Support recommends using stable DNS servers like Cloudflare (1.1.1.1) OpenDNS (208.67.222.222) specifically for these requests to avoid timeouts. Check the Configuration File : Verify that DiaServerUrl v4.url.zvelo.com /opt/kerio/winroute/winroute.cfg Check the Configuration File : Verify that DiaServerUrl v4
: Ensure that your Kerio Control's web filter database is up to date. An outdated database might lead to incorrect categorization or failure to block/allow sites as intended.
Note: The base firewall license might be active, but the Web Filter requires its own valid software maintenance sub-license. 2. Verify Port 443 and Server Connectivity To prevent similar issues in the future, we
Check the box for and click Edit (or Add ). Set the DNS name field to exactly *.zvelo.com .
请不要直接尝试重置防火墙，这不仅会中断网络，而且往往无法从根源上解决问题。请按以下顺序操作：
: Switch your custom DNS forwarders to stable providers like Cloudflare (1.1.1.1) or OpenDNS (208.67.222.222) specifically for *.zvelo.com traffic.
[URLFilter] Failed to activate: license not found [URLFilter] Cloud query failed: SSL certificate verification failed [URLFilter] Cannot connect to update server: Network unreachable [WebFilter] Categorization disabled: no valid license file