Factory Reset setting wipes out all your data and password along with Network settings. Let’s take a look on the steps on how to reset ASUS Router RT- N66U to default factory settings. Type your router IP address in any of the web browser. When asked, enter your user name and password. Go to the Systems Or Systems Tools. Here you would find Restore or Factory Default. Click on that and press OK to confirm. Wait for the router to Reboot.