Cisco Cisco Web Security Appliance S380 Guia Do Utilizador

This architecture has the following characteristics:

Web transactions are transparently redirected 
to the Web Security appliance, and those 
transactions are redirected by a WCCP enabled 
router.

The adaptive security appliance, WCCP router, 
and Web Security appliance reside on the same 
subnet.

This architecture is similar to 

 except that the Web Security 

appliance resides on a different subnet than the 
adaptive security appliance and WCCP router.

This architecture is similar to 

 except that client applications are 

configured to explicitly forward web traffic to the 
Web Security appliance as a Web Proxy. There is no 
need for a WCCP enabled router.

This architecture uses a router, but the router is not 
WCCP enabled. Instead, the ASA (which is WCCP 
enabled) uses WCCP to redirect web traffic to the 
WSA. You might want to use this architecture if 
you do not have a router that is WCCP enabled.