| Traffic forwarding & routing |
Keeps working |
The office stays online, which is precisely why nobody notices the licence has lapsed |
| VPN tunnels |
Keeps working |
Site-to-site and remote-access tunnels continue to pass traffic |
| Web filtering |
Fails |
Policies that depend on the FortiGuard category lookup stop resolving, and traffic matching those rules is dropped — staff report sites not loading |
| DNS filtering |
Fails |
Same failure mode, and it can look like a broad internet outage rather than a licensing problem |
| IPS & antivirus signatures |
Frozen |
Inspection still runs, but against the signature set from the day the licence lapsed. The gap widens every day and nothing on the dashboard shouts about it |
| Sandboxing & advanced services |
Unavailable |
The cloud-delivered parts of your bundle stop responding |
| Fortinet technical support |
Ends |
No TAC case can be raised. This is discovered at the worst possible moment — during an incident |
| Firmware & security patches |
Entitlement ends |
The device stays on its current firmware, including any known vulnerabilities in it |
| Hardware replacement (RMA) |
Not covered |
A hardware failure becomes a purchase rather than a replacement |
| Evaluation & pay-as-you-go licences |
Stop passing traffic |
Unlike a physical appliance, these fail closed — the connection goes down entirely |