HTTP 403 Error with Siteminder and Apache in Cognos 8.4

If you are having siteminder configuration in your environment and if you are getting below error message :

You are not authorized to view this page

You might not have permission to view this directory or page using the credentials you supplied.
If you believe you should be able to view this directory or page, please try to contact the Web site by using any e-mail address or phone number that may be listed on the Website.url home page.
You can click Search to look for information on the Internet.

HTTP Error 403 - Forbidden Internet Explorer

Symptoms : Some of the Cognos 8.4 features when clicked giving HTTP 403 error like
1) when clicking on Folders inside Cognos default security namespace
2) when clicking on Datasources to view signon connection.

Solution : Go to Cognos Configuration and enable following settings :

Local Configuration > Security > IBM Cognos Application Firewall

Enable CAF Validation : True ( By Default)
Is third party XSS checking enabled : True

If the page is still giving HTTP 403 error,go to siteminder logs and see if its giving Invalid Characters error.If so,check for the naming convention of folders/datasource and correct it.Also it can be corrected from Siteminder side if those naming conventions are absolutely necessary.