The server control interface (IPMI) allows controlling, diagnose and recover a server remotely on hardware level. IPMI does not depend on operating systems and works even when the server is turned off.
DCImanager can work with IPMI right from the interface. You can controll:
server power supply;
web interface connections in public networks;
web interface connections proxying for private networks;
automatic IPMI configuration at deleting of the server.