If you don't have a static IP, then just hold in the factory reset button on the back for about 5 seconds. That will factory reset the gateway. Be advised any configurations you made to the modem will be lost and the login will be cusadmin highspeed. The LAN IP will be 10.1.10.1. If you do have a static IP, do not factory reset it as you will loose your static ip configuration file. Call care @ 800-391-3000 to have the password reset. You willl need your account information and PIN for authentication for them to reset it for you.