The following figure shows the configuration of the URL filtering configuration file.

The firewall will first check the blacklist entries and then the whitelist entries.

Assuming that the user visits the www.exzample.com website, which belongs to the categories of humanities and social networks at the same time, the user cannot access the

website.

The user visits the website www.exzample.com, and when the black and white list is not hit, the next step is to query the predefined URL category entry.

The default action means that all websites are allowed to visit. So the configuration is wrong here.