To set up your router for fiber internet quickly, connect the router to your fiber modem, access the router's settings via a web browser, and input the provided ISP credentials. Make sure to update the firmware, configure Wi-Fi security, and customize your network name for. However, setting up a fiber optic connection to your router can seem daunting if you're unfamiliar with the process. This comprehensive guide combines industry standards with field-tested practices to ensure you achieve a rock-solid. The fiber optic modem is activated by your Internet Service Provider and connected to the fiber optic socket (you need to set up the Glasfaser-ID and Modem-ID). You have credentials to set up.