You can enable device detection to allow FortiOS to monitor your networks and gather information about devices operating on those networks, including:
- MAC address
- IP address
- Operating system
- When FortiOS detected the device and on which interface
You can enable device detection separately on each interface in Network > Interfaces. Device detection is intended for devices directly connected to your LAN ports. If enabled on a WAN port, device detection may be unable to determine the OS on some devices. You can enable active scanning on the interface to find hosts whose device types FortiOS cannot determine passively.
You can also manually add devices to Device Inventory to ensure that a device with multiple interfaces displays as a single device.
The following topics provide information about Device Inventory: