The problem might be on my side , I am testing port 1373 and the previously working 21, neither getting through. Despite I have NSG configured and attached to the ubuntu server.(Azure)
and the same NSG allowing me to connect to that server on port 22.
General Internet access ( port 443 ) is OK from the ubuntu.
I ll have to think of an alternative and may be run that python script on heliohost, so there is no need to upload anything.
The python script requires some modules, that I am not sure if they would be available on heliohost. ( python-ogn- client).