You must replace the default password immediately for security reasons, after completing your Linksys RE6300 setup, because default passwords are easily available that can breach your network. Then, navigate to the web interface of the extender via your browser and log in to the "Administration" or "Wireless" page, where you can alter the password. It has been changed to a strong password that combines lowercase and uppercase letters, numbers, and special characters. Do not use easily identifiable information. Changing the passwords at intervals increases security, protecting your network from misuse. This simple action protects your extended Wi-Fi with a safe and reliable connection. Offer security during setup for uninterrupted use.