This solution applies to all Barracuda Web Filters.
You can prevent all unauthenticated users from accessing the Internet by using the following steps:
- Navigate to Block/Accept > Exceptions
- Set the Action to Block
- Click on Lookup
- From the pop-up, select Unauthenticated
- Under Category, select All Web Traffic
- Click Add
- Move the Exception to the top of the list or to the desired position.
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