Hi @Andrew_Cowan,
There aren’t any outages ongoing that would prevent connection to your Core machine.
So we can better assist you, please provide a brief description of your current setup using this link as a guide.
Make sure to describe your network configuration/topology, including any networking hardware currently in use, so we can have a clear understanding of how your devices are communicating.
Can you also confirm whether or not you can access the Nucleus Web Administration Interface?
Thanks!