FortiOS CLI Cheat Sheet is the complete quick-reference of FortiOS CLI commands grouped by function. Copy any command with one click and find what you need with Ctrl+F in under 3 seconds.
These commands are irreversible. Verify your environment (dev/staging vs prod) before running them.
Action
Command
Warning
⚠️ Factoryreset
execute factoryreset
Irreversible — verify the target before running
FAQ — Frequently Asked Questions
What is the difference between Firewall Policy and NAT & VIP?
Each group in this FortiOS CLI cheat sheet covers a distinct area. Firewall Policy focuses on its specific scope, while NAT & VIP and the remaining groups cover networking, storage, security and diagnostics respectively.
How do I check the installed FortiOS CLI version?
Run the version command (usually fortios version or fortios --version). The output shows the client and, when applicable, the server version.
Why does FortiOS CLI return ‘permission denied’?
A ‘permission denied’ error in FortiOS CLI usually means the current user lacks sufficient privileges or credentials are not configured. Check: (1) assigned IAM/RBAC roles, (2) an active authentication context via the corresponding login command.
How do I filter FortiOS CLI output by status or name?
Use flags such as --filter, --selector or --query depending on the tool. You can also pipe into grep or jq to process JSON:
fortios list | grep RUNNING
What is the fastest way to debug a FortiOS CLI error?
Add the verbose flag (--verbose, -v or --debug) to the failing command. This reveals the underlying HTTP/API calls and the full error response body.
Official sources & references
Commands cross-checked against vendor documentation and high-authority repositories:
