FIX: AT&T U-verse gateway authentication failure

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Updated onOctober 4, 2023

updated onOctober 4, 2023

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While setting your new gateway or working with your existing gateway you may encounter Gateway authenticationfailure. please contact your service providererror.

Thiserrorcan occur due to multiple reasons including not connecting the right cable in the ONT port as well as the user account not being properly provisioned for the new gateway.

If you are also troubled by thiserror, here are a couple of troubleshooting tips to help you resolve Gateway authenticationfailure, please contact your service providererror.

How do I fix Gateway authentication failure U-verse AT&T error?

1. Check the cable and ONT port

2. Perform a power cycle

3. Reset the modem

4. Check for an outage

If the issue persists, try contacting the service provider. The tech support can help you resolve the issue or offer you a replacement gateway if the issue cannot be resolved.

The Gateway authenticationfailure. please contact your service providererrorcan be usually resolved by resetting the modem. However, if the issue persists after trying all the troubleshooting tips, contacting the service provider is recommended.

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FIX: AT&T U-verse gateway authentication failure#

How do I fix Gateway authentication failure U-verse AT&T error?#

1. Check the cable and ONT port#

2. Perform a power cycle#

3. Reset the modem#

4. Check for an outage#