Guide to Fix Gateway Authentication Failure ATT

Are you experiencing issues while trying to connect to the web through the U-Verse modem? We see Gateway Authentication Failure ATT error while connecting to the net as long as the configuration settings aren't proper. You can't hook up with the web via the U-Verse modem with an error in configuration settings and see the error. It'd also happen if the configuration file is corrupted because of sudden shutdowns. It cannot read the corrupt file and show you the Gateway Authentication Failure while connecting to the web. Let's see how we will fix the error and connect with the web without a hassle.

Steps to Fix Gateway Authentication Failure Error

If you face the issue and see a Gateway Authentication Failure error, then this guide is for you. We have some fixes that resolve your issue in no time.

1.    Check the Internet Connection

The primary fix we must always try once we are having issues connecting to the web is to see the status of the connection. We need to make sure the connection is okay without an outage situation. If there are difficulties with the connection, you could contact your ISP to resolve the difficulty.

2.    Check the Cable and ONT Port

Sometimes loose cables or unproperly connected cables are the reason for the gateway authentication failure error. We need to make sure that the cables are correctly fitted and connected. Also, check if the cable is plugged into the right ONT port. Check your modem's user manual and confirm everything is okay with the cable and ONT port.

3.    Power Cycle the Router

The power cycle is nothing but removing the power supply and unplugging all the cables from the router. After that, we need to rest it for a while and reconnect everything. This lets the modem clear up the built internet cache, making it hard to create a new connection. 

4.    Reset and Reconfigure the Modem

Resetting the modem is the last fix to get rid of the gateway authentication error. Resetting the modem is like taking it back to the factory settings. After the reset, the modem will restart. Reconfigure the modem with the details of your Internet service provider.

These are all the fixes you can apply to resolve the Gateway Authentication Failure error.