def create_ssh_tunnel(self, tunnel_password):
    """
    This method is used to create ssh tunnel and update the IP Address and
    IP Address and port to localhost and the local bind port return by the
    SSHTunnelForwarder class.
    :return: True if tunnel is successfully created else error message.
    """
    # Fetch Logged in User Details.
    user = User.query.filter_by(id=current_user.id).first()
    if user is None:
        return False, gettext("Unauthorized request.")

    try:
        tunnel_password = decrypt(tunnel_password, user.password)
        # Handling of non ascii password (Python2)
        if hasattr(str, 'decode'):
            tunnel_password =
                tunnel_password.decode('utf-8').encode('utf-8')
        # password is in bytes, for python3 we need it in string
        elif isinstance(tunnel_password, bytes):
            tunnel_password = tunnel_password.decode()

    except Exception as e:
        current_app.logger.exception(e)
        return False, "Failed to decrypt the SSH tunnel "
                      "password.nError: {0}".format(str(e))

    try:
        # If authentication method is 1 then it uses identity file
        # and password
        if self.tunnel_authentication == 1:
            self.tunnel_object = SSHTunnelForwarder(
                self.tunnel_host,
                ssh_username=self.tunnel_username,
             ssh_pkey=get_complete_file_path(self.tunnel_identity_file),
                ssh_private_key_password=tunnel_password,
                remote_bind_address=(self.host, self.port)
            )
        else:
            self.tunnel_object = SSHTunnelForwarder(
                self.tunnel_host,
                ssh_username=self.tunnel_username,
                ssh_password=tunnel_password,
                remote_bind_address=(self.host, self.port)
            )

        self.tunnel_object.start()
    except BaseSSHTunnelForwarderError as e:
        current_app.logger.exception(e)
        return False, "Failed to create the SSH tunnel."
                      "nError: {0}".format(str(e))

    # Update the port to communicate locally
    self.local_bind_port = self.tunnel_object.local_bind_port

    return True, None

if self.tunnel_authentication == 1:
   self.tunnel_object = SSHTunnelForwarder(
     (self.tunnel_host, int(self.tunnel_port)),
      ssh_username=self.tunnel_username,
      ssh_pkey=get_complete_file_path(self.tunnel_identity_file),
      ssh_private_key_password=tunnel_password,
      remote_bind_address=(self.host, self.port)
     )
else:
   self.tunnel_object = SSHTunnelForwarder(
     (self.tunnel_host, int(self.tunnel_port)),
      ssh_username=self.tunnel_username,
      ssh_password=tunnel_password,
      remote_bind_address=(self.host, self.port)
     )