How to configure the router when changing IP address via fiber optic cable

You can change your fiber optic router's IP by adjusting either the public WAN IP via your ISP or the private LAN IP through the router's admin settings.Step 1: Access Your Router SettingsConnect your computer to the router via Ethernet or Wi-Fi.Open a web browser and enter the router's IP address (commonly 192.168.1.1 or 192.168.0.1) in the address bar .Log in using the admin username and password (check the router label if you haven't changed it), .Step 2: Changing the Private LAN IPNavigate to Network Settings or LAN Settings in the router interface .Locate the IP Address field and enter a new private IP (e.g., 192.168.1.2) that is within your network range and not used by another device .Save the changes and reboot the router.Reconnect your devices and ensure they receive updated IP addresses automatically via DHCP .Step 3: Changing the Public WAN IPMost residential fiber connections use dynamic IPs assigned by your ISP .To get a new public IP, power off the router for 5–30 minutes to allow the DHCP lease to expire .Turn the router back on; it will request a new IP from your ISP.If the ISP keeps assigning the same IP, use MAC address cloning in the router settings to trick the ISP into issuing a new IP .Step 4: Verify the ChangeCheck your public IP using an online IP checker to confirm the WAN IP has changed .For private IP changes, access the router using the new IP to ensure connectivity .Tips for Fiber RoutersEnsure the router firmware is up to date for smooth configuration .Record your original IP, login credentials, and DHCP range before making changes to avoid losing access .Use a wired connection when changing IP settings to prevent disconnections during the process . By following these steps, you can successfully change both the internal LAN IP and the external WAN IP on your fiber optic router, improving network organization, privacy, or resolving IP conflicts.