You can either use the predefined pages, or you can
Customize the URL Filtering Response Pages
to communicate your specific acceptable use policies and/or corporate branding. In addition, you can use the
URL Filtering Response Page Variables
for substitution at the time of the block event or add one of the supported
Response Page References
to external images, sounds, or style sheets.
You can also add code that triggers the firewall to display different messages depending on what URL category the user is attempting to access. For example, the following code snippet from a response page specifies to display Message 1 if the URL category is games, Message 2 if the category is travel, or Message 3 if the category is kids: