Working through How to Setup Asus RT-AX58U Router begins with connecting the router to your modem and powering it on. Open a browser and type “router.asus.com” to reach the setup page, then sign in with the default admin credentials. Follow the on-screen wizard to configure your WiFi name, password, and security settings for fast, reliable AX58U performance.
https://www.asuslogin.com/asus-rt-ax58u/