Hey @diver110 – starting a new thread is always a good idea if you need help. It’s also a good idea to flag @support and include all the details of your setup, as described here.
Based on the info in your post this sounds like it could be firewall related, so you might want to try shutting off firewalls on your Core machine completely to see if that helps. If that doesn’t work, let us know the details I mentioned above and we’ll figure out what’s going on here. Thanks!