NTU-RG-54xx. User manual (user)
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4.4.3.5  The 'URL Blocking' submenu. Internet access restriction configuration
URL filter performs complete analysis and provides access control to specific Internet resources. This section 
sets and displays a list of forbidden/allowed URLs to visit. Here you can add the forbidden/allowed FQDN 
(Fully Qualified Domain Name) with the 'Add' button, filtering by keywords is also possible. The added 
restrictions are displayed in the 'URL Blocking Table' and the 'Keyword Filtering Table'. To remove a specific 
URL or keyword from the table, click on it and then on the 'Delete Selected' button. To delete all restrictions 
click the 'Delete All' button.
Services → Firewall → URL Blocking
URL Blocking (Enable/Disable)–enable/disable URL Blocking operation;
FQDN–Fully Qualified Domain Name;
Keyword–keyword.
To save the changes, click the 'Apply Changes' button.
4.4.3.6  The 'Domain Blocking' submenu. Domain blocking configuration
This section is used to set domain blocking.
Services → Firewall → Domain blocking
To block the domain check Enable, fill the Domain field and click the 'Add' button
Domain Blocking (Enable/Disable)–enable/disable blocking;
Domain – domain name.