Closing the loop on this thread. TLDR; I think most everyone has gotten this working by reconnecting directly to their ATT Modem's wifi rather than using the dmz/passthrough to devices behind it. To a...
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Closing the loop on this thread. TLDR; I think most everyone has gotten this working by reconnecting directly to their ATT Modem's wifi rather than using the dmz/passthrough to devices behind it. To add some more color, I've put mine in "true bypass mode" which removes the ATT modem from handling any traffic beyond satisfying the 802.1x cert challenge. This allows me to have my nest wifi -> ubiquity router -> ONT Internet Direct to GPON on house. (The att modem's ONT port sits off another port on my ubiquity to respond with the cert, but nothing is connected to it's LAN and it's WIFI is disabled.) In this config, my issues are also gone. That pretty much to me says it is an issue that surfaces when the ATT Modem is configured in passthrough, and the connectivity of the controller passes through the back-end device in that setup. So options: 1. Connect to the wifi on the uverse modem. 2. Setup the full bypass if you can. (bread crumb: https://medium.com/@mrtcve/at-t-gigabit-fiber-modem-bypass-using-unifi-usg-updated-c628f7f458cf) Good luck all!