For example, a law firm could set up a content download job that refreshes
content from online legal websites that are commonly used in the firm. Data can be
retrieved quickly from internal clients, but the information is still known to be fresh.
Designing ISA Server 2006 Caching Solutions
ISA Server 2006 content-caching solutions typically fit into one of two models. In the first
model, the ISA server acts as an edge firewall to a network, such as what is shown in
Figure 8.2. In this case, the ISA server provides for full firewall functionality to the clients
on the network, monitoring and securing all traffic to the clients on the network. In addition,
the server acts as a web and FTP proxy for the internal clients.
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The second content-caching deployment model for ISA Server 2006 is one where the ISA
server provides for caching to only the clients on the network, similar to what is shown in
Figure 8.3. In this model, the ISA server is used as a cache-only server, with a single
network interface connected to either the internal or the DMZ network of an organization.
This model, which was the common deployment model for ISA??™s predecessor, Proxy
Server 1.
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