First, connect your computer to your internet provider. The internet connection can be through a wireless network or LAN with reliable internet speeds. Slow internet could interrupt the process. For ATT Router Login, open your internet browser and type 192.168.1.254 into your AT&T router IP address bar. Press Enter to proceed to the AT&T router log-in page. You will then be directed to a login page. From here, enter your username and password. If you have not yet changed the default settings, type admin for username. Look for a sticker at the side of your modem and enter the variables next to “System Password” or “Device Access Code.” If a password is required and none can be found on your router, try leaving the page blank.