SQL Server error log entry : Error: 17806, Severity: 20, State: 14

I have error in my log for a few weeks, I searched a lot but I couldn't found useful answer.

I did closed SQL Server port for public IP, but I have problem yet.

Error: 17806, Severity: 20, State: 14.

SSPI handshake failed with error code 0x8009030c, state 14 while establishing a connection with integrated security; the connection has been closed. Reason: AcceptSecurityContext failed. The Windows error code indicates the cause of failure. The logon attempt failed [CLIENT: 10.10.3.25]

Time raised: 27 Jan 2015 2:23 PM

It was raised error while this system was off.