FortiGate & FortiOS troubleshooting, faster.

Search by bug ID, symptom, or scenario — SSL VPN tunnel issues, IPsec Phase 2 flapping, HA sync, and more. Answers grounded in Fortinet docs and confirmed by engineers.

Answers synthesized from docs.fortinet.com and the Fortinet community.

Common troubleshooting scenarios

Tip of the dayFortiGate CLI

diagnose debug flow traces a single packet through the firewall — filter with diagnose debug flow filter addr <ip> first, or you'll flood the console.