In the Authentication process of Linksys extender setup re3000w, you will be required to enter the welshing username and password of your router. This welshing username and password are ADMIN that you might have heard most of the time. It is the most common username and password that most WIFI companies are using as default login credentials to their WIFI routers. When you finish the logging process, then your router will redirect you to the admin panel of your router. https://bit.ly/2RNmidn