Cisco Cisco Web Security Appliance S670 User Guide

Using the Web Security appliance as a web proxy on your network, you can process and control network 
traffic that uses these transport protocols:

HTTP

FTP

HTTPS

SOCKS

When enabled, the web proxy processes HTTP and FTP traffic. To process HTTPS traffic, you need to 
enable the web proxy and the HTTPS proxy. To process SOCKS traffic, you need to enable the web 
proxy and the SOCKS proxy.