The Management 1 port's network settings can be modified via the IOTA GUI (see Network configuration) or by using the unit's USB ports (see Network configuration via USB).
To reset the device to factory settings, create a file called iota_factory_reset_unit_<pretty_mac> where <pretty_mac> is the Management 1 MAC address in lowercase, without colon separators (:), e.g. ffffffffffff for MAC address FF:FF:FF:FF:FF:FF. Place this file at the root of a USB drive, connect the USB drive to one of the unit's USB ports, and power on or restart the unit. When this file is detected at startup of the device, the factory reset will be triggered. The Capture LED will blink 3 times to confirm that the factory reset process was triggered successfully.
Factory reset can also be initiated via the Factory Reset button on the IOTA GUI's IOTA Settings > Administration page.
Note: Resetting the IOTA to factory settings will remove all data stored on the device.