Integrated Lights-Out, or iLO, is a proprietary embedded server management technology by Hewlett Packard Enterprise which provides out-of-band management facilities. The physical connection is an Ethernet port that can be found on most ProLiant servers and microservers[1] of the 300 and above series.
iLO has similar functionality to the lights out management (LOM) technology offered by other vendors, for example, Sun/Oracle's LOM port, Dell DRAC, the IBM Remote Supervisor Adapter and Cisco CIMC.