You can use a web browser to access your net gear modem login; use a device connected to your router's network to launch a web browser. In the address bar, type routerlogin.net or The login window for the router appears. Next, enter the username and password for the router administrator. Use the Nighthawk app to log into your NETGEAR router: Check to check if the Nighthawk app can connect to your router. Visit nighthawk-app.com to get the Nighthawk app. Next, make sure your mobile device is connected to the WiFi network of your NETGEAR router. Then, log in to your NETGEAR account and open the Nighthawk app.