Thank you for your report, @David_G! We always appreciate your feedback.
To start, may I kindly ask that 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.
May I also ask that you please verify the following:
- As @Carl mentioned (thanks, Carl!), have you tried rebooting your router? I also recommend power cycling your Core machine as well as any endpoints.
- Do you have any firewall or antivirus enabled on your Core machine?
Regards,
Dylan