Unable To Load Fortiguard Ddns Servers List On Fortigate Firewalls Jun 2026

A valid response returns a JSON array of providers. An error here indicates API-level blocking.

Run the following commands to switch to the Fortinet-preferred UDP protocol: A valid response returns a JSON array of providers

config system dns set primary 8.8.8.8 set secondary 8.8.4.4 end A valid response returns a JSON array of providers

Before blaming FortiGuard, confirm the firewall can reach the internet. A valid response returns a JSON array of providers

Share your experience or additional workarounds in the comments below. For urgent assistance, visit the official Fortinet Community Forum or open a support ticket with the diagnostic outputs listed above.