--- title: Create a List of Webpages to Block for Domain Users with GAT Shield description: "1. How to block specific webpages for domain users with GAT Shield's Site Access Control. ### What it is This guide demonstrates how to use the Site Access Control feature of [GAT Shield.](https://gatlabs.com/knowledge/tech-tips/gat-shield-overview/) The Site Access Control feature gives the…" url: "https://gatlabs.com/knowledge/tech-tips/create-a-list-of-webpages-to-block-for-domain-users-with-gat-shield/" updated: "2025-06-25" category: URL Filtering tags: - GAT Shield --- # Create a List of Webpages to Block for Domain Users with GAT Shield 1. How to block specific webpages for domain users with GAT Shield's Site Access Control. ### What it is This guide demonstrates how to use the Site Access Control feature of [GAT Shield.](https://gatlabs.com/knowledge/tech-tips/gat-shield-overview/) The Site Access Control feature gives the Admins control over which websites users in the domain can access. ### Why it matters Blocking webpages with GAT Shield gives you fine-grained control over what your users can see online. It's like a safety net, protecting them from dangerous websites and letting you block any pages you don't want them to visit. The Google Admins (or delegated auditors) can create a custom list of webpages that would be blocked for the users of the domain. ## How to implement ### Navigate to GAT Shield > Site Access Control > User-defined categories User-defined categories are manually created categories that the Admins create for the users. To create a custom category click on**New Category**button. ![GAT Shield dashboard showing User Defined Category section and the New Category button to create the new category.](https://gatlabs.com/knowledge/wp-content/uploads/2024/09/Create-1.png) All available options to add a list of the websites to the category will be displayed in the new window. There are a few ways to add a list of web pages to the category: 1. Via a **List or a clipboard** 2. Via **Spreadsheet** 3. Via **Web Search** 4. Via **Recent Browsing** ![Creating a New Category window showing four options to create one: via List or clipboard, via Spreadsheet, via Web search, and via Recent browsing activities.](https://gatlabs.com/knowledge/wp-content/uploads/2024/09/Create-3.png) Each way uses a different method to add the URLs to the category. - **Create From List or Clipboard** - enter the Site URLs  to be blocked via Paste from clipboard (1) or add list manually (2) ![Create From List Or Clipboard creator window showing the option to Paste from clipboard and to Add list manually.](https://gatlabs.com/knowledge/wp-content/uploads/2024/09/Create-4.png) - **Create From Spreadsheet -** **Create New Spreadsheet** (1) and add the Sites needed, or **Select Existing Spreadsheet** (2) to enter the URLs ![Create Form Spreadsheet creator window showing two options: Create New Spreadsheet and Select Existing Spreadsheet.](https://gatlabs.com/knowledge/wp-content/uploads/2024/09/Create-5.png) - **Web Search** - Search for a keyword and block or allow all sites found by the Search. Adjust your filter by specifying Handle adult websites (1) option from the following ones: Off, Moderate, Strict, and select the Results localization (2). Next, enter the Keyword search (3) and click on Search button (4) to be able to review the search results (5). ![Create From Web Search creator window showing the following configurations: Handle adult websites (Off, Moderate or Strict), Results localization, Keyword search and the Search button. Below the table with the search results is displayed.](https://gatlabs.com/knowledge/wp-content/uploads/2024/09/Create-6.png) - **Recent browsing** - this is a list of URLs generated from the last 90 days' browsing history. ![Create the category via Recent browsing creator window showing the message that the list is being generated. The notification message is displayed and reads as follows: "Generated from last 7 days browsing history. Submitted generation of URL Access Category CSV task. You will receive email once finished."](https://gatlabs.com/knowledge/wp-content/uploads/2024/09/Create-7.png) - - When the spreadsheet is generated, it will be sent as an email to the Admin account ![An email notification sent to Admin who generated the list of recently browsing websites. The email contains a link to the spreadsheet and a spreadsheet attachment.](https://gatlabs.com/knowledge/wp-content/uploads/2024/09/Create-8.png) - - Use the generated spreadsheet and import from**Create From Spreadsheet > Select the existing spreadsheet >**The generated spreadsheet will be shown as an option to be selected - Select the sheet, and the URLs will be added as a category of sites ![Spreadsheet wizard window showing how to use the generated spreadsheet with the most recent web pages viewed. Select Existing Spreadsheet, and the last generated spreadsheet displayed in the wizard window.](https://gatlabs.com/knowledge/wp-content/uploads/2024/09/Create-9.png) - - - Alternatively, copy and paste the URLs via the **List or Clipboard option.** #### Create the rule When the Site URLs are added by using one of the above options, enter a name and description for the rule and click **Create.** ![Create New category wizard window showing the creating steps: the category Name, Description, Summary and the Create button.](https://gatlabs.com/knowledge/wp-content/uploads/2024/09/Create-10.png) #### Create a rule based on the custom category When the category is created, there will be a new button to click on the**Create rule**(1). The category is also displayed under the User Defined Categories menu (2) ![User Defined Categories dashboard showing the recently created category and the option to Create rule based on that category.](https://gatlabs.com/knowledge/wp-content/uploads/2024/09/Create-11.png) A new window will be displayed. Fill in the details. - **Rule name** - enter the rule name (1) - Category - the newly created category name will be shown by default (2) - **Action** - under the Action section (3) select the action to be done: - Set the Rule action to Block (4) - Redirect URL - enter a page to which the users will be redirected if they visit the blocked site (optional) (5) - **Scope** - under the Scope section (6) select the users who will be affected by the rule - User - Group - OU - Include  sub. org. units - All users - Set up **Additional Options (optional)** (7), such as: - Apply this rule only for Chromebook devices - Enter rule description - Add Time restriction - **Create** - click to Create the rule (8) ![The Rule wizard window showing how to create the rule based on the user defined category. ](https://gatlabs.com/knowledge/wp-content/uploads/2024/09/Create-12.png) #### Result for User-defined category When the rule is created, it can be found under **Rules.** ![The Rules dashboard showing all the rules with the must recently created on the top of the list.](https://gatlabs.com/knowledge/wp-content/uploads/2024/09/2025-06-05-16_15_15-Window.png) The affected user will be blocked from opening the websites as below. Every time the user tries and open the page, it will be blocked. ![GAT Shield in action blocking the website and showing the "Wrong Way" message.](https://gatlabs.com/knowledge/wp-content/uploads/2024/09/facebook-blocked.gif)