An improved solution for authenticating a user seeking to manage a computer system is provided according to aspects of the invention. A user seeking to perform out-of-band management of the computer system can provide a set of credentials to a service processor, which in turn provides them to the computer system for authentication. Additionally, a user seeking to perform in-band management of the computer system can provide a set of credentials to a management agent executing on the computer system for authentication. In either case, the computer system can authenticate the set of credentials, e.g., using an operating system interface.