Cisco Cisco Web Security Appliance S170 Guia Do Utilizador

The Web Security appliance is typically installed as an additional layer in the network between clients 
and the Internet. Depending on how you deploy the appliance, you may or may not need a Layer 4 (L4) 
switch or a WCCP router to direct client traffic to the appliance. 

When you deploy the Web Security appliance, you can enable one or both of the following features:

Secure web proxy. The appliance web proxy service monitors and scans web traffic for malicious 
content. When you enable the web proxy, you can configure it to be in transparent or explicit forward 
mode.

L4 Traffic Monitor. The L4 Traffic Monitor detects and blocks rogue traffic across all ports and IP 
addresses. The L4 Traffic Monitor listens to network traffic that comes in over all ports and IP 
addresses on the appliance and matches domain names and IP addresses against entries in its own 
database tables to determine whether to allow outgoing traffic.

By default, both the L4 Traffic Monitor and Web Proxy are enabled in the System Setup Wizard. If you 
need to disable both or one of these features, you can do so after initial setup from the web interface. 

The features you enable determine how you deploy and physically connect the appliance to the network. 
For more information about how the features you enable affect appliance deployment, see 

. For more information about the Ethernet ports used to physically connect the 

appliance to the network, see 

.