Troubleshooting: U-Verse ‘Gateway Authentication Failure’ Error



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When setting up a new gateway or using an existing gateway, you may encounter a “Gateway authentication failure” error. Contact your service provider.

This error can occur for a variety of reasons, such as an incorrect cable connection to the ONT port or an incorrect user account setting for the new gateway.

If you also encounter this error, here are some tips to resolve the “Gateway authentication failure” error.

What is the cause of the “Gateway authentication failure” error in U-Verse?

There are always different types of Internet problems like default gateway unreachable, 502 bad gateway, etc. The Gateway authentication failed error is one of the most common errors that occur when connecting to the internet using a U-Verse modem. This error usually indicates an error in the parameter configuration.

What causes a gateway authentication failure error? The main reason for this error is that some startup configurations are built by the router, which increases boot time. If the configuration settings can be corrupted due to a sudden outage, it will not allow the router to connect to its servers.

How to resolve the “Gateway authentication failure” error on U-Verse?



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Switch to Google DNS

Google offers Internet users a domain name server called Google DNS. If you still can’t get rid of this problem, change your DNS to Google DNS by following these steps and see if the error is fixed.

  1. Click the search button on the taskbar and open the Control Panel.
  2. Now go to the Network and Internet option.
  3. Now find the Network and Sharing Center and select it.
  4. In the left pane, select Change Adapter Settings.
  5. Right-click on the Internet to which you are currently connected and select Properties.
  6. Select Internet Protocol version 4 (TCP/IPv4) and click Properties.
  7. Select the button in parallel to Use the following DNS servers addresses.
  8. Now set Preferred DNS and Alternate DNS to 8.8.8.8 and 8.8.4.4 respectively.
  9. Apply the settings and see if the problem is resolved.

Manually registering the device on the network

It is possible that your router cannot automatically register the device on the network. In this case, go to the Internet settings and manually add the device to the network by following these steps.

  1. Click the search button on the taskbar and enter Command Prompt.
  2. Type the following command at the command prompt and press Enter to run: ipconfig
  3. Scroll down until you see the default gateway setting under Ethernet or Wi-Fi.
  4. Copy and paste the IP address of the router’s default gateway into your browser’s search bar to open the Internet settings.
  5. Find and click the WPS button and select Add Device.
  6. You will be prompted to enter the PIN for the device that you want to manually connect to your network. (To get this PIN, go to the Internet settings on your device and look for the WPS PIN under “Manual Registration”).
  7. Enter the PIN here and apply the settings.

Perform a hard reset of the modem

A hardware reset of the modem has proven to be the most effective way to resolve the gateway authentication error. A hardware reset allows you to restore your router settings to factory defaults. If the remedies listed in the Tips section didn’t work, follow the steps below to perform a hardware modem reset and see if that solves the problem.

Router:

  1. Turn off the router and locate the reset button on the back of the router.
  2. Use a paper clip to press and hold the reset button for at least 30 seconds.
  3. When all indicators on the router go out, release the button and wait for the device to reboot after rebooting.

Browser:

  1. Click the search button on the taskbar and type Command Prompt.
  2. Type the following command in the window and press Enter to launch: ipconfig
  3. Scroll down until you see the default gateway setting under Ethernet or Wi-Fi.
  4. Copy and paste the IP address of the router’s default gateway into your browser’s search bar to open Internet Settings.
  5. Click the Diagnostics tab and then click Reset.
  6. Enter the device password and click Next.
  7. Now select the Reset Device option.



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Frequently Asked Questions

  1. Reset your modem: Press and hold the reset button on the back of the modem for 20 seconds. This may resume your services. You can also connect to the modem to reset it.
  2. Check the connectors: they may disconnect if you bump them. Sometimes cables come off accidentally.

Gateway authentication error. Contact your service provider. Usually, you can solve the problem by resetting your modem. However, if the problem persists after you have tried all the troubleshooting suggestions, it is recommended that you contact your service provider.

  1. Turn off the router and locate the reset button on the back of the router.
  2. Use a paper clip to press and hold the reset button for at least 30 seconds.
  3. When all the lights on the router go out, release the button and wait for the device to reboot after the reset.

  1. Unplug the power cord from the back of the gateway or modem.
  2. Wait 20 seconds.
  3. Replace the internal battery, if there is one.
  4. Reconnect the power cord.
  5. Wait up to 10 minutes until the gateway or modem restarts and the broadband light turns green.