MacOS "All of a Sudden" Cannot Connect using firewall 1:1 NAT Rule - Maybe IPv6 Issue?
I have numerous users working remotely on MacOS devices connecting to a web site hosted behind an MX84. I've configured the MX84 with a 1:1 NAT rule allowing their public IP. It's been working with months without an issues. As of yesterday, they can no longer connect, i.e. https://MyWebsiteBehindMX84.com returns error page: Server is unavailable now. Please try again later or contact your administrator. Their public IP has not changed and we verified another non-MacOS device on their LAN can connect.
I'm thinking a MacOS update may have caused this issue, perhaps something to do with IPv6? Any insights are greatly appreciated!