Cisco ASA 5505 Configuration Manual page 303

Configuring Web Cache Services Using WCCP
This chapter describes how to configure web caching services using WCCP, and includes the following
sections:
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Information About WCCP
The purpose of web caching is to reduce latency and network traffic. Previously-accessed web pages are
stored in a cache buffer, so if users need the page again, they can retrieve it from the cache instead of the
web server.
WCCP specifies interactions between the adaptive security appliance and external web caches. The
feature transparently redirects selected types of traffic to a group of web cache engines to optimize
resource usage and lower response times. The adaptive security appliance only supports WCCP Version
2.
Using an adaptive security appliance as an intermediary eliminates the need for a separate router to do
the WCCP redirection, because the adaptive security appliance redirects requests to cache engines.
When the adaptive security appliance determines that a packet needs redirection, it skips TCP state
tracking, TCP sequence number randomization, and NAT on these traffic flows.
Guidelines and Limitations
The following WCCPv2 features are supported for the adaptive security appliance:
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OL-20339-01
Information About WCCP, page 12-1
Guidelines and Limitations, page 12-1
Licensing Requirements for WCCP, page 12-2
Adding or Editing WCCP Service Groups, page 12-3
Configuring Packet Redirection, page 12-4
WCCP Monitoring, page 12-4
Feature History for WCCP, page 12-5
Redirection of multiple TCP and UDP port-destined traffic.
Authentication for cache engines in a service group.
Multiple Cache Engines in a service group.
C H A P T E R
Cisco ASA 5500 Series Configuration Guide using ASDM
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