How to disable SSO on WAC124 (possible others) and still keep internet connectivity.

So Netgear's SSO is broken, at least for the WAC124. So the trick is how to acess the web GUI after Netgear broke it. You can still access the GUI after disabling the WAN connection, but then how to use the AP? Well, firewall it.

We used a Cisco Meraki MX to firewall the WAC124 and prevent it from accessing the internet. Just the WAC124, all devices connected to it still have internet access. So the WAC124's OS is prevented from accessing the internet and thus the end user is presented with the local login instead of SSO.

There you go, kick that failed SSO to the curb! Get your WAC124 back without paying support money to Netgear.