I'm so sorry to say that doesn't work
and my windows firewall is completly OFF status now, and doesn't use any firewall applications

https://frontier.ffxiv.com
doesn't show anything on my browser, and say "There was a temporary DNS error. Try refreshing the page. Error Code : INET_E_RESOURCE_NOT_FOUND"

But




I did tracert to https://frontier.ffxiv.com and there is no blocking issue occured.

but with browser or launcher those error occurs.


and Also, I found that my 12yo sub computer with windows7 just work properly with both browser and launcher.