@Feniks, error:
"protocol negotiation failed: NT_STATUS_CONNECTION_RESET"
This is because the Windows server
which has been configured to only allow SMBv2
will TCP RST the connection.
Adding "-m SMB2" parameter, to the smbclient command
will result in the following error:
"Unrecognised protocol level SMB2"
Resolution
upgrade to support for SMBv2.
Cause
Samba 3.6 does not support SMBv2. (Because of problems with durable handles.)
Samba 4.x does support SMBv2. (Durable handles support was added in 4.0.0)