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  1. Jun 2021
    1. This error occurs while trying to attach to the internet with a U-Verse modem. To repair the Gateway Authentication Failure error, attempt to reset your modem, press and hold the reset button located on the rear of the modem for 20 seconds. Wait for 10 minutes for the modem to restart. this might get your services up and work. Also, check the connections; they will loosen if bumped into. Sometimes cables are unplugged by mistake.