184.108.40.206 SMB_COM_WRITE_BULK (0xD9)
This command was reserved but not implemented. It is listed in earlier documentation from Microsoft and third parties; however, no formal definition of the command was ever provided, and the command itself was never implemented. Two related commands--SMB_COM_READ_BULK and SMB_COM_WRITE_BULK_DATA--were also never implemented.
Clients SHOULD NOT send requests using this command code. Servers receiving requests with this command code SHOULD<129> return STATUS_NOT_IMPLEMENTED (ERRDOX/ERRbadfunc).