"No route to host" error running python console in a container

In PyCharm I have setup a remote interpreter on a docker image and made it the default interpreter for my project:

I can connect to a container that uses this without any problems however when I open up the python console, which tries to run that remote interpreter, I get this:

Python 2.7.5 (default, Nov 6 2016, 00:28:07) 
[GCC 4.8.5 20150623 (Red Hat 4.8.5-11)] on linux2
Traceback (most recent call last):
 File "/opt/.pycharm_helpers/pydev/_pydev_bundle/pydev_console_utils.py", line 274, in add_exec
 self.finish_exec(more)
 File "/opt/.pycharm_helpers/pydev/_pydev_bundle/pydev_console_utils.py", line 457, in finish_exec
 return server.NotifyFinished(more)
 File "/usr/lib64/python2.7/xmlrpclib.py", line 1233, in __call__
 return self.__send(self.__name, args)
 File "/usr/lib64/python2.7/xmlrpclib.py", line 1587, in __request
 verbose=self.__verbose
 File "/usr/lib64/python2.7/xmlrpclib.py", line 1273, in request
 return self.single_request(host, handler, request_body, verbose)
 File "/usr/lib64/python2.7/xmlrpclib.py", line 1301, in single_request
 self.send_content(h, request_body)
 File "/usr/lib64/python2.7/xmlrpclib.py", line 1448, in send_content
 connection.endheaders(request_body)
 File "/usr/lib64/python2.7/httplib.py", line 1013, in endheaders
 self._send_output(message_body)
 File "/usr/lib64/python2.7/httplib.py", line 864, in _send_output
 self.send(msg)
 File "/usr/lib64/python2.7/httplib.py", line 826, in send
 self.connect()
 File "/usr/lib64/python2.7/httplib.py", line 807, in connect
 self.timeout, self.source_address)
 File "/usr/lib64/python2.7/socket.py", line 571, in create_connection
 raise err
error: [Errno 113] No route to host

I've googled around and found things suggesting the firewall may be the problem. I tried to open up the appropriate port as per http://ask.xmodulo.com/open-port-firewall-centos-rhel.html by issuing:

sudo firewall-cmd --zone=public --add-port=41560/tcp

but that hasn't helped.

Bit clueless as to what to do next. Any suggestions?

thanks in advance