Hello,
I had similar problem. I could test my jobe server from python script, but it did not work from moodle website. I don't think O2switch closed those ports. Moodle itself deny curl connections to any ports but 80 and 443 by default. Easy solution is to add 8080 port to white list from Moodle admin interface:
Site administration -> general -> Security -> HTTP security -> cURL allowed ports list