I recall hardly any of the details now but IIRC I talked to the AT&T support person and they changed some settings. Looking at the settings now, I see in "Home

I recall hardly any of the details now but IIRC I talked to the AT&T support person and they changed some settings. Looking at the settings now, I see in "Home Networks->Subnets & DHCP" the [public subnet mode] is on. I haven't had to deal with any EAP authentication (but again I may be forgetting!). And IP Passthrough is off. Basically the modem is routing between the public and private subnets. BTW, I do have a static IP block from AT&T.