Special Notices
Compatibility with FortiOS versions
The following units have a new WiFi module built-in that is not compatible with FortiOS 5.2.1 and lower. It is recommended to use FortiOS 5.2.2 and later for these units.
Affected models
| Model | Part Number |
| FWF-60CX-ADSL | PN: 8918-04 and later |
The following units have a memory compatibility issue with FortiOS 5.2.1 and lower. It is recommended to use FortiOS 5.2.2 and later for these units.
Affected models
| Model | Part Number |
| FG-600C | PN: 8908-08 and later |
| FG-600C-DC | PN: 10743-08 and later |
| FG-600C-LENC | PN: 11317-07 and later |
Removed WANOPT, NETSCAN, FEXP features from USB-A
The following features have been removed from the FortiGate and FortiWiFi 80C, 80CM, and 81CM:
- WAN Optimization l Vulnerability scanning
- Using FortiExplorer on a smartphone to manage the device by connecting to the USB-A port
Router Prefix Sanity Check
Prior to FortiOS 5.2.4 under the config router prefix table, if there are any le and ge settings that have the same prefix length as the prefix, you may lose the prefix rule after upgrading to FortiOS 5.2.4 or later.