HOW do you reset your username and password
The S33 is a cable modem, which allows only one device to be connected via Ethernet at a time. Since you have multiple devices connected, are you using a router with the modem?
To log in to the interface page, open a browser and enter 192.168.100.1 in the address bar. Use the username "admin" and the password, which could either be "password" or the last 8 digits of the modem's serial number.
If this doesn't work, you may want to consider performing a factory reset on the modem to restore the default credentials.
For more information, you can check the links below:
http://arris.force.com/consumers/articles/General_FAQs/S33-Factory-Reset
http://arris.force.com/consumers/articles/General_FAQs/S33-Web-Manager-Access
Like @SURFboard Moderator says, the S33 is a modem. It doesn’t do any blocking/anything like that. What router do you have/ that’d be the key