Fix Gateway Authentication Failure ATT Now!

AT&T U-Verse offers IPTV (Internet Protocol TV) service to the forty-eight states of America. Although it’s extremely well-liked for its efficient and robust performance, quite recently, a lot of its customers have come across an issue while attempting to connect to the internet through the U-Verse router that says: gateway authentication failure. Contact the service provider. If you’ve unexpectedly faced this gateway authentication failure att error, do not panic and follow this simple guide for eliminating this error as we’ve illustrated a few efficient fixes that will assist you in terminating this glitch.

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What Are The Reasons For The Gateway Authentication Failure ATT?

After receiving user’s complaints, we found that there’re many causes that are responsible for causing this issue.

If the network equipment is out of order, then this gateway authentication failure problem might occur.
If the configurations of your router get corrupted suddenly, then you may come across this problem.

How Can You Resolve The Gateway Authentication Failure Issue?

Follow this guide for getting rid of the gateway authentication failure problem:

Method#1: Doing A Hard Modem Reset

Individuals have stated that a hard reset of your modem has been established as the most competent fix for getting rid of this att gateway authentication failure issue. A hard reset can assist you in reverting the settings of your router to the default factory settings. Follow these below steps for doing a hard reset of the modem and check whether the problem is fixed.

Resetting Through The Router:

First of all, power the router off and find the Reset button at the rear of the router.
Push that Reset button using a paper clip and hold it for about thirty secs.
When all the LED lights of your router go dim, simply release this button and wait for your device to start up after the simple reset.

Resetting Through The Browser:

First of all, simply click on the search button from your taskbar > enter Command Prompt.

After that, enter the ‘ipconfig’ command in the opened window > press enter for running it.
Scroll down until you see the setting for the Default Gateway under Wi-Fi or Ethernet.

Then, simply copy the Default Gateway IP Address of your router and paste it in the search bar of your browser for opening the Internet Settings.
Next, go to the Diagnostics section > click Reset.

Type your Device Access Code > click on Continue.

Now, select Reset Device.

Method#2: Making Use Of The myAT&T Tool For Troubleshooting

If you still cannot eliminate the AT&T gateway authentication failure problem after the hard reset of the modem, there’s an alternate fix for troubleshooting this issue. AT&T has released the myAT&T mobile tool that can assist its customers in finding the issue and resolving it simply without seeking assistance from the customer support service. This program can test the service and show a few simple instructions on the users’ screen that they can simply follow for getting rid of the majority of the glitches.

Method#3: Enabling The Dual-Band On The Router

The dual-band routers are the ones that can offer better performance than the single-band one by simply transmitting the two concurrent wireless signals at 2.4 and 5 GHz. If you come across the gateway authentication failure problem, then there may be a chance that the dual-band mode is actually disabled on the router; hence, enable it that option by simply following these steps:

First of all, click on the search button from the taskbar > enter Command Prompt.

After that, simply enter the ‘ipconfig’ command in the opened window > press the enter key for running the command.
Next, simply scroll down until you see the setting for the Default Gateway under Wi-Fi or Ethernet.

Simply copy the Default Gateway IP Address of your router > paste it in the search bar of your browser for opening the Internet Settings.
From the left-hand side menu pane, simply choose Wireless > Advanced.
Now find Band from the right-hand side of your window > set that to 5 GHz.

After that, simply apply all the changes and wait for a few minutes.
Reboot the router to make certain that it works with all your new settings.

Method#4: Running The System Setup Wizard On AT&T

The system setup wizard of the router is a graphical user interface that can assist the user in going through the step by step process for carrying out the complex tasks related to their router. If you still cannot eliminate this issue, then simply go to the system setup wizard and follow the instructions on your screen for identifying the type of issue. Follow these steps:

First of all, simply click on the search button from your taskbar > enter Command Prompt.

After that, simply enter the ‘ipconfig’ command in the opened window > press the enter key for running the command.
Next, simply scroll down until you see the setting for the Default Gateway under Wi-Fi or Ethernet.

Simply copy the Default Gateway IP Address of your router > paste it in the search bar of your browser for opening the Internet Settings.
From the bottom of your window, find and choose Run system set-up wizard.
After that, enter the password > click Submit.
Follow the instructions on your screen until you see the PPP Authentication > type in all the required credentials here > click on Next.

After entering all the required credentials, if still, you face this issue or no PPP sign-in service found, then simply get in touch with the AT&T support service and explain everything to them regarding the issue you are facing.

Method#5: Contacting The Customer Support Service

If none of the fixes mentioned above worked for you, then the only option left is to make contact with the internet service provider and ask about the workaround to eliminate this gateway authentication failure ATT error. There may be a chance that your MAC address on the new network equipment isn’t actually authorized. All you need to do is to call your internet service provider and explain the issue to a representative. They’ll most probably send some engineer to your place that’ll figure out your error and get rid of it so that you do not face this problem ever again in the future.