In Figure 3.13, for example, several default rules that were created from the Network
Template Wizard are illustrated.
FIGURE 3.12 Viewing the Firewall Policy node.
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Exploring Firewall Policy Settings
In this example, four rules control the flow of traffic and specify what is allowed and what
is denied through the firewall. Each rule in the Details pane can be sorted by multiple
variables, listed as follows:
. Order??”The order of the rule determines when it is processed. Whenever any type of
traffic arrives at the ISA server, the firewall rules are applied in order, from lowest
number to highest. If a match is made for the type of traffic, that firewall rule is
processed and no further rules are parsed.
. Name??”Names of rules are displayed in the console to aid in the identification of what
each rule does. Names chosen for rules should ideally indicate the rule??™s function.
. Action??”The action of a rule is one of two choices: Allow or Deny. For obvious
reasons, it is critical to ensure that the rules have this field set properly.
. Protocols??”The Protocols column displays to what common or custom-defined
protocols the particular rule applies, such as HTTP, FTP, DNS, and others.
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