Follow these steps in order to diagnose and fix the connection issue. Step 1: Verify FortiGuard Connectivity via CLI
Switching from Anycast to a legacy UDP-based protocol often resolves the TLS handshake errors that prevent the server list from loading. :
This comprehensive guide breaks down why this error happens and provides a step-by-step troubleshooting workflow to resolve it. Root Causes of the Error Follow these steps in order to diagnose and
This ensures your FortiGate uses its own, manually set DNS servers (preferably FortiGuard's) for its own requests, rather than ones supplied by your ISP.
If Step 4.2 failed:
Furthermore, verify that you do not have a blocking the firewall's own outbound system traffic. Check this under Policy & Objects > Local-In Policies (if enabled in Feature Visibility). Alternative Workaround: Configure DDNS via CLI
If the system time is significantly off, SSL handshake failures will occur, blocking secure communication with FortiGuard. Step-by-Step Troubleshooting and Resolution 1. Verify Basic Connectivity Root Causes of the Error This ensures your
: An expired FortiCare contract can block access to these service lists. Verify your license status in the Upstream Filtering