FortiGate Firewall & FortiOS
FortiGate DNS resolution problems
Compare DNS results from a trusted client and firewall and verify configured resolvers and routing.
Before you begin
Confirm which device, operating system, and device version you are using. Keep any error message or order reference available, but do not share passwords, authentication codes, or full payment details.
Recommended troubleshooting steps
- Compare DNS results from a trusted client and firewall and verify configured resolvers and routing.
- Restart the device or app and confirm your internet connection is stable if the feature requires online access.
- Check version compatibility and install approved updates only during an authorized maintenance window.
- Record the exact error message and the steps that trigger it. This helps distinguish an account issue from a product or device-specific problem.
- If the problem continues, consult the official product help pages for the specific device and platform.
What if the issue continues?
Try to reproduce the problem once after restarting. Before changing firewall or VPN configuration, preserve a verified backup and follow organizational change-control procedures. For account recovery, licensing, and security incidents, use verified official support channels.