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Implementing Cisco IOS Network Security (IINS 640-554) Foundation Learning Guide, Second Edition by Catherine Paquet

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Chapter 8. Access Control Lists for Threat Mitigation

Cisco provides basic traffic filtering capabilities with access control lists (ACL). You can configure ACLs for all routed network protocols to filter packets as the packets pass through a router or security appliance. There are many reasons to configure ACLs; for example, you can use ACLs to restrict the contents of routing updates or to provide traffic flow control. One of the most important reasons to configure ACLs is to provide security for your network; this is the reason on which this chapter focuses.

This chapter outlines the types of ACLs that are available and provides guidelines that help create ACLs to provide network security in IPv4 and IPv6 environments. More precisely, this ...

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