Web Gateway 7.1.5 Product Guide - McAfee

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Rules and rule sets
About rule sets
Nested rule sets
Rule sets can have other rule sets nested within them. A nested rule set has its own criteria. Regarding
cycles, it can only be processed in the cycles of the nesting rule set, but need not be processed in all of
them.
This way, a nested rule set can be configured to deal especially with a particular cycle, while another
nested rule set deals with a different cycle.
For example, a media type filtering rule set could apply to all cycles, but have nested rule sets that are
not processed in all of them:
Media Type Filtering rule set (for requests, responses, and embedded objects)
• Nested rule set Media Type Upload (only for requests)
• Nested rule set Media Type Download (only for responses and embedded objects)
Implementing a rule set system
A system of rule sets can be implemented in the following ways:
• Use of the policy creation wizard — When using this wizard, you can select values for the type of
your organization, your region, and a level of strictness. A system of rule sets is implemented
accordingly.
• Default configuration — If you make no selections, the default system of rule sets is implemented.
• Own configuration — You can create rule sets of your own, fill them with rules of your own and add
them to a system that was created using the wizard or to the default system. If you find that a
completely individual solution is best suited for your network, you can also use only rules and rule
sets of your own to filter web traffic.
• Logging and error handling rule sets — The appliance provides default rule sets for logging and
error handling. These are part of every initial configuration, regardless of whether you use the wizard
or implement the default system. They can be reviewed and modified like all other rule sets.
Rule set systems
This section gives an overview of the rule sets that can be implemented on your appliance by using the
policy creation wizard or accepting the default. It also gives an overview of the rule set library.
What rule sets are actually implemented on your appliance depends:
• On the version of the appliance software
• On whether you used the policy creation wizard (with particular selections) or accepted the default
rule set system
• On the modifications you made to the rule set system that was initially implemented
92 McAfee Web Gateway 7.1.5 Product Guide