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
Chapter 6: Security Mechanisms
522
Summary of Contents for NetDefendOS
Page 30: ...Figure 1 3 Packet Flow Schematic Part III Chapter 1 NetDefendOS Overview 30 ...
Page 32: ...Chapter 1 NetDefendOS Overview 32 ...
Page 144: ...Chapter 2 Management and Maintenance 144 ...
Page 284: ...Chapter 3 Fundamentals 284 ...
Page 392: ...Chapter 4 Routing 392 ...
Page 419: ... Host 2001 DB8 1 MAC 00 90 12 13 14 15 5 Click OK Chapter 5 DHCP Services 419 ...
Page 420: ...Chapter 5 DHCP Services 420 ...
Page 573: ...Chapter 6 Security Mechanisms 573 ...
Page 607: ...Chapter 7 Address Translation 607 ...
Page 666: ...Chapter 8 User Authentication 666 ...
Page 775: ...Chapter 9 VPN 775 ...
Page 819: ...Chapter 10 Traffic Management 819 ...
Page 842: ...Chapter 11 High Availability 842 ...
Page 866: ...Default Enabled Chapter 13 Advanced Settings 866 ...
Page 879: ...Chapter 13 Advanced Settings 879 ...