Cisco Cisco Web Security Appliance S370 사용자 가이드

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Cisco IronPort AsyncOS 7.7 for Web User Guide
Chapter 5      Web Proxy Services
Configuring the Web Proxy
Step 2
Click Edit Settings.
Step 3
Verify the Enable Proxy field is selected.
Step 4
Configure the basic and advanced Web Proxy settings. 
Table 5-1
Web Proxy Settings 
Property
Description
HTTP Ports to Proxy
Enter which ports the Web Proxy monitors for HTTP requests.
Default is 80 and 3128.
In deployments using WCCP, the maximum number of port entries is 30 
for HTTP, HTTPS, and FTP ports combined. 
Caching
With caching enabled, the Web Proxy caches requests and responses.
Proxy Mode
Choose how to deploy the Web Proxy:
  •
Transparent mode. Clients applications are unaware of the Web 
Proxy and do not have to be configured to connect to the proxy. In 
transparent mode, the Web Proxy can accept both transparently 
redirected and explicitly forwarded connections. 
For more information, see 
  •
Explicit forward mode. Client applications, such as web browsers, 
are aware of the Web Proxy and must be configured to point to a single 
Web Security appliance. In explicit forward mode, the Web Proxy can 
only accept explicitly forwarded connections. 
For more information, see 
IP Spoofing
Choose whether or not the Web Proxy should spoof IP addresses when 
sending requests to upstream proxies and servers. 
When the Web Proxy is deployed in transparent mode, you can enable IP 
spoofing for transparently redirected connections only or all connections 
(transparently redirected and explicitly forwarded).
When IP spoofing is enabled, requests originating from a client retain the 
client’s source address and appear to originate from the client rather than 
from the Web Security appliance. 
Note: When IP spoofing is enabled and the appliance is connected to a 
WCCP router, configure a WCCP service to redirect the return path.