Full Dual Stack (IPv4 and IPv6) Connection from Anywhere

GL.iNet Beryl AX (GL-MT3000) as a dual-stack network access point. I’ve been doing some day job stuff where I need to test a device from a full dual stack (IPv4 and IPv6) residential network connection, but our house has Wide Open West service which is unfortunately only IPv4. While there are a bunch of ways to tunnel the IPv6 half of a connection out to the internet (eg: tunnelbroker.net and my OPNsense router) I’ve previously had issues with path asymmetry (IPv4 going one route, IPv6 going another) making things… quirky… so I didn’t want to do that. I wanted a real dual stack connection but didn’t want to bring another ISP into the house. I have a GL.iNet Beryl AX (GL-MT3000) “travel router” that I keep around as a just-in-case piece of hardware. They are super useful for if something happens to the main network, I want a VPN gateway for all devices when traveling, or experimentation and testing. Well, here we are, testing time, and it’s an (almost) perfect platform for building a…