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AsyncOS 9.0 for Cisco Web Security Appliances User Guide
 
Chapter 17      Notify End-Users of Proxy Actions
  Editing Notification Page HTML Files Directly
<span style=”color: red”>Warning:</span> You must acknowledge the following statements 
<i>before</i> accessing the Internet.
 
Note
If you need greater flexibility or wish to add JavaScript to your notification pages, you must edit the 
HTML notification files directly. See 
Caveats for URLs and Logos in Notification Pages 
This section applies if you will make any of the following customizations: 
Enter text into the “Custom Message” box for any notification on the Edit End User Notification 
page 
Directly edit HTML files for on-box notifications 
Use a custom logo 
All combinations of URL paths and domain names in embedded links within custom text, and the custom 
logo, are exempted from the following for on-box notifications: 
User authentication
End-user acknowledgment
All scanning, such as malware scanning and web reputation scoring 
For example, if the following URLs are embedded in custom text:
http://www.example.com/index.html
 
http://www.mycompany.com/logo.jpg
 
Then all of the following URLs will also be treated as exempt from all scanning:
http://www.example.com/index.html
 
http://www.mycompany.com/logo.jpg
 
http://www.example.com/logo.jpg
 
http://www.mycompany.com/index.html
 
Also, where an embedded URL is of the form: 
<protocol>://<domain-name>/<directory path>/
 then 
all sub-files and sub-directories under that directory path on the host will also be exempted from all 
scanning. 
For example, if the following URL is embedded: 
http://www.example.com/gallery2/
 URLs such as 
http://www.example.com/gallery2/main.php
 will also be treated as exempt.
This allows you to create a more sophisticated page with embedded content so long as the embedded 
content is relative to the initial URL. However, you should also take care when deciding which paths to 
include as links and custom logos. 
Editing Notification Page HTML Files Directly 
Each notification page is stored on the Web Security appliance as an HTML file. If you require more 
customization than the “Custom Message” box in the web-based interface allows, you can directly edit 
these HTML files. For example, you can include standard JavaScript or edit the overall look and feel of 
each page.