Information: The above problem occurs because of the failure of GSSAPI authentication.
Generic Security Services Application Program Interface(GSSAPI) is a ITEF standard for doing strong encrypted authentication in network based applications. OPENssh uses this API and the underlying kerberos 5 code to provide a alternative means of authentication other than ssh_keys.
1. Open Putty.
|Putty: Access Denied Problem|
Note: PuTTY 0.62 fixed the bug where failing GSSAPI authentication caused this error message.