Editing Content Filtering Http Banner Files - D-Link NetDefendOS User Manual

The HTML pages contain a number of parameters that can be used as needed. The parameters
available are:
• %URL% - The URL which was requested.
• %IPADDR% - The IP address which is being browsed from.
• %REASON% - The reason that access was denied.
• %RESTRICTED_SITE_NOTICE_BEGIN_SECTION% - This begins the restricted site section.
• %RESTRICTED_SITE_NOTICE_FORM% - Allows the restricted notice to be ignored.
• %RESTRICTED_SITE_NOTICE_END_SECTION% - This ends the restricted site section.
• %RECLASSIFICATION_FORM% - Allows site reclassification to be flagged.
By not including the section between %RESTRICTED_SITE_NOTICE_BEGIN_SECTION% and
%RESTRICTED_SITE_NOTICE_END_SECTION%, the ability to ignore the restricted site warning can
be removed.
Customizing Banner Files
To perform customization it is necessary to first create a new, named ALG Banner Files object.
This new object automatically contains a copy of all the files in the Default ALG Banner Files
object. These new files can then be edited and uploaded back to NetDefendOS. The original
Default object cannot be edited. The following example goes through the necessary steps.
Example 6.25. Editing Content Filtering HTTP Banner Files
This example shows how to modify the contents of the URL forbidden HTML page.
Web Interface
1. Go to: System > Advanced Settings > HTTP Banner files > Add > ALG Banner Files
2. Enter a name such as new_forbidden and press OK
3. The dialog for the new set of ALG banner files will appear
4. Click the Edit & Preview tab
5. Select URLForbidden from the Page list
6. Now edit the HTML source that appears in the text box for the Forbidden URL page
7. Use Preview to check the layout if required
8. Press Save to save the changes
9. Click OK to exit editing
10. Go to: Policies > User Authentication User Authentication Rules
11. Select the relevant HTML ALG and click the Agent Options tab
12. Set the HTTP Banners option to be new_forbidden
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Chapter 6: Security Mechanisms