The Hitron CGN3 Residential D3 WiFi Gateway installs with default administrator credentials according to the manual. But it isn’t clear if there are two different logins:
The CGN3’s default IP address and login credentials are as follows. For more information, see Login to the CGN3 on page 23.
IP Address 192.168.0.1
Enter the CGN3’s IP address (default 10.0.0.1) in the URL bar. The Login screen displays.
Enter the Username and Password. The default login username is admin, and the default password is password