If a user is using a manual setup method during the setup process of his D'Link range extender, he has to apply the default credentials while interacting with the dlinkap.local interface. You can fetch the default Wireless settings and login credentials through the Wi-fi configuration card that comes along with your D-Link range extender. In case, the Wi-fi configuration card doesn’t come along with your device, you can fetch those details from the back of your device from its product label.