'Called when an unsupported version of the ssh protocol is received from
the remote endpoint.
@param remoteVersion: remote ssh protocol version which is unsupported
by us.
@type remoteVersion: L{str}'

def _unsupportedVersionReceived(self, remoteVersion):

    self.sendDisconnect(DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED, ('bad    version    ' + remoteVersion))
