com
HTTP Request for www.microsoft.com
HTTP Request for www.microsoft.com
FTP Request for ftp.cco.com
FIGURE 1.4 Deploying ISA Server 2006 as a web-caching server.
23 Augmenting an Existing Security Environment with ISA Server 2006
1
by the ISA administrator. The resources that can be accessed can be designated via access
rules, so the control can be very granular.
In addition to this control, ISA Server also makes it possible to quarantine VPN users that
do not comply with specific rules that can be set up. For example, ISA can be configured
to quarantine clients that do not have antivirus programs installed. Different access rules
can be configured for the Quarantine VPN Users network as well, restricting their access
even further, for example.
Finally, ISA Server also includes the ability to set up site-to-site VPN connections to remote
sites across the Internet. This enables networks to be joined across VPN links. An added
advantage is that the Internet Key Exchange (IKE) protocol used to set up this connection
can also be used to set up a site-to-site VPN between an ISA Server and another third-party
VPN product.
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