For example, if a ping request was sent from the command
prompt of the ISA server, that request would originate from the Local Host network,
and there would need to be a specific firewall rule and network rule to allow the
request to be sent.
. Internal??”The internal network is a default network that represents the full range of
IP addresses on the default protected network in an organization. The internal
network possesses certain special functionality that is not contained in the other
networks. For example, default System Policy rules are created to allow the ISA
server itself to access services on the internal network. In addition, the internal
network has special implications for firewall clients, enabling them to access local
resources directly, as opposed to through the firewall itself. For more information on
the internal network and its implications, see Chapters 5, ???Deploying ISA Server
2006 as a Firewall,??? and 11, ???Understanding Client Deployment Scenarios with ISA
Server 2006.???
. External??”The external network is unique in that it, by default, contains all IP
addresses that haven??™t been specified in any of the other networks.
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