In smaller environments, the CSS would be installed directly on the ISA server. In larger
and more secure environments, however, the CSS would be installed on systems within
the network, such as in the ISA environment displayed in Figure 6.1.
Because the Content Storage Server is essentially an LDAP-compliant, scaled-down version
of an Active Directory forest, it can easily be replicated to multiple areas in an organization.
It is ideal to configure at least one replica of the CSS server to maintain redundancy
of ISA management.
NOTE
Although the ISA servers get their configuration information from a CSS server, they do
not shut down or fail if the CSS is down. Instead, they continue to process rules based
on the last configuration given to them from the CSS server.
The example illustrated in this chapter uses a single CSS server installed on an internal
domain controller, as shown in Figure 6.2. In addition, step-by-step deployment guides to
setting up two ISA Server 2006 Enterprise servers running as edge firewalls in a network
load balanced array of ISA servers are outlined.
Although ISA Server Enterprise allows for a myriad of deployment models, this deployment
scenario illustrates one of the more common ISA deployment scenarios, which is
one that takes full advantage of ISA functionality.
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