We’re here to support in case you missed my earlier message. Are you able to confirm your internet service provider, modem, and router? We’ll be watching for your response.
Looking back through diagnostics from your initial attempt to connect to ARC, there’s an excellent chance that the issue you’ve experienced so far is due to your provider having implemented carrier-grade network address translation.
I recommend you read through this staff post on a similar thread, where I’ve aggregated several workarounds: