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Network Security Principles and Practices by Saadat Malik

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Features of IOS Firewall

IOS Firewall comes with an array of features that make it suitable for deployment in today's complex network environments. Not only does CBAC offer basic features such as TCP session tracking and UDP session timing, but it also allows application-level protocols to be handled well by the router running the CBAC feature set. In addition, CBAC has extensive DOS prevention features that are critical to any network. This section discusses the main features that the IOS Firewall offers a network.

Transport Layer Inspection

At the transport layer, IOS Firewall can inspect for the two primary transport protocols, TCP and UDP. The firewall can inspect all packets that are sent across the firewall router using these protocols. ...

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