Conversely, firewalls, in some cases, can prevent (stop) applications from maintaining a superior connection with both your internet and the network. On the other hand, Netgear new extender setup is only possible if you have live and active connections coming out of your existing wireless router. Step 3 Now, type "ipconfig" into the window and hit the Enter key on your keyboard. Once done, enter the set of numbers next to the "Default Gateway" into the field of address bar of up-to-date and relevant internet browser, hit "Enter" and navigate to you’re the setup page of your network wireless router. You might want to restart your computer/ laptop and your internet connection as well for the changes to take effect. Step 2 Plug in your Netgear device into an electrical outlet and wait for a couple of seconds for your router to boot up completely.