To change the administrator login:
Open an Internet browser. In the address field, type in: 192.168.100.1
The default username is: admin
The default password is: motorola
(all lower case)
Click the "Advanced" tab on the top right side.
Click the "Security" tab.
Under Security, where it shows "Username & Password" you can change both the username and password if you like.
Current Password: motorola
New username: You may change the username or keep it at 'admin' by typing in: admin
New Password: The new password may be up to 15 characters: a to z and 0-9, upper and lowercase accepted. No special characters
Now click SAVE.
Both the Username and Password are case sensitive. If you change either of these and forget what they are you will not be able to access the modem without doing a factory reset.
(this will return the Username and Password to the factory defaults. There is no other way to recover the password and username).