Port: 623 UDP

Intelligent Platform Management Interface

Allows to administrate machines from exterior, even when powered off / crashed.

Typical usages:

• Modify BIOS Settings
• When host is down
• Access to a crashed host
• (Monitoring temperature, voltage, fan status, power supplies, access hardware logs)

Required components:

• Baseboard Management Controller (BMC) - A micro-controller and essential component of an IPMI
• Intelligent Chassis Management Bus (ICMB) - An interface that permits communication from one chassis to another
• Intelligent Platform Management Bus (IPMB) - extends the BMC
• IPMI Memory - stores things such as the system event log, repository store data, and more
• Communications Interfaces - local system interfaces, serial and LAN interfaces, ICMB and PCI Management Bus

BMCs often comes with servers, or can be plugged to motherboard.

Common BMCs: HP ILO, Dell DRAW, Supermicro IPMI