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CCIE Routing and Switching v4.0 Quick Reference, Second Edition by Steven Means, Jacob Uecker, Brad Ellis

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Chapter 9. Security

Access Lists / Extended IP Access Lists

Many types of access lists are available in Cisco IOS Software for many different protocols. See Table 9-1 for a complete list.

Table 9-1 Cisco IOS Software Access Lists

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You are permitted one access list per protocol, per interface, per direction.

Figure 9-1 Access Control Lists

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At the end of every access list is an implied deny-all-traffic access control entry (ACE). Therefore, if a packet does not match any of your criteria statements, it is blocked.

Remember that the order of access ...

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