Chapter 9. IOS Firewall

This chapter covers the following key topics:

  • Context-Based Access Control— This section discusses CBAC, the mechanism behind the firewall implementation on IOS running routers.

  • Features of IOS Firewall— This section talks about features available in the IOS Firewall.

  • Case Study: CBAC on a Router Configured with NAT— This section contains a comprehensive case study involving an IOS Firewall implementation.

IOS Firewall, part of the CiscoSecure Integrated Software, is a stateful packet-filter firewall that runs on a router, providing firewall capabilities in addition to the router's normal routing functionality. This chapter discusses how the IOS Firewall operates and some of the important characteristics that define ...

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