def check_port_forward_request(self, address, port):
return False<EOL>
Handle a request for port forwarding.  The client is asking that
connections to the given address and port be forwarded back across
this ssh connection.  An address of ``"0.0.0.0"`` indicates a global
address (any address associated with this server) and a port of ``0``
indicates that no specific port is requested (usually the OS will pick
a port).

The default implementation always returns ``False``, rejecting the
port forwarding request.  If the request is accepted, you should return
the port opened for listening.

:param str address: the requested address
:param int port: the requested port
:return:
    the port number (`int`) that was opened for listening, or ``False``
    to reject