This chapter showed you the basics of using the IDS feature of the Cisco IOS Firewall feature set. Even though the IDS feature is not a full-blown IDS solution, it provides good coverage for small businesses, as well as an extra level of protection on your perimeter router. Setting up IDS is simple and enables you to examine traffic before an ACL processes it.

Next up is Chapter 17, which shows you how to protect your network from DoS attacks by using various Cisco IOS features.