x/2.x, allows for proxy capabilities, but doesn??™t take full advantage of the firewall
functionality in the server.
CHAPTER 8 Deploying ISA Server 2006 as a Content Caching Server
From a content-caching perspective, both deployment models for ISA are essentially the
same. For some organizations, deploying a full-blown edge firewall and content-caching
ISA Server
Internal Nework
Internet
WebServers
Internet
FIGURE 8.2 Understanding the edge firewall content-caching model.
Active
Directory
Server
SharePoint
Server
Live
Communications
Server
Windows
Media
Server
Exchange
Mailbox
Server
ISA Server
Database
Server
Internal Nework
Internet DMZ Network
Existing
Firewall
FIGURE 8.3 Understanding the caching-only server model.
203
8
Designing ISA Server 2006 Caching Solutions
proxy server is ideal. For other organizations with an existing investment in security and
firewall technologies, it may make sense to deploy a unihomed (single NIC) ISA server in
the DMZ of the existing firewall to take advantage of the content-caching capabilities, as
well as to provide for reverse-proxy functionality. For more information on this type of
deployment scenario, refer to Chapter 7, ???Deploying ISA Server as a Reverse Proxy in an
Existing Firewall DMZ.
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