The Cisco Web Security Appliance S660 is now obsolete (past End-of-Life and End-of-Support status).
End-of-Sale Date: 2012-07-19
End-of-Support Date: 2017-07-31
Cisco's End-of-Life Policy
You can view a listing of available Cisco Secure Web Appliance offerings that best meet your specific needs
If you want support information for the Cisco Web Security Appliance S660 documentation, it may be available through Cisco.com Search or in the Cisco Community