Guidelines for Applying CBAC and ACLs

You must apply your CBAC configurations to an interface for traffic to be inspected. Along with applying your named inspection rule to an interface, you must specify the traffic direction that will be inspected. Traffic can be inspected when entering an interface or when exiting an interface. Actually, you can apply CBAC in two directions on the same interface; however, it is rarely done.

The syntax to apply CBAC inspection is

Router(config-if)# ip inspect inspection-name [in | out]

An example that applies CBAC to inspect traffic leaving an interface is shown in Figure 4.10.

Figure 4.10. Applying an outbound inspection rule.

You can also have other services applied to the same interface as CBAC. You could ...

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