This chapter introduces access control lists (ACLs), covering how sequence numbering works, how to apply ACLs, and the tasks to configure IPv4, IPv6, and extended ACLs on the Cisco 8000 Series Router.
Access Control Lists
This topic describes access control lists (ACLs) on the Cisco 8000 Series Router, which perform packet filtering to control which packets move through the network and where.
Purpose of IP Access Control Lists
This topic lists the purposes for which you can use IP Access Control Lists (ACLs) on the Cisco 8000 Series Router.
IP access list entry sequence numbering
This topic describes the IP access list entry sequence numbering feature on the Cisco 8000 Series Router, which allows you to add sequence numbers to access-list entries and resequence them.
How applying ACLs work
This topic describes how ACLs are applied on the Cisco 8000 Series Router, and provides guidelines for referencing ACLs on terminal lines and network interfaces.
IPv4 ACLs
This topic introduces IPv4 access control lists (ACLs) on the Cisco 8000 Series Router, which you can apply in the ingress or egress direction on interfaces to filter IPv4 traffic.
IPv6 ACLs
This topic introduces IPv6 access control lists (ACLs) on the Cisco 8000 Series Router, which you can create and apply to interfaces to filter IP version 6 (IPv6) traffic.
Configure extended ACLs
This topic describes how to configure extended ACLs on the Cisco 8000 Series Router to verify more than just the source address of packets by matching on attributes such as destination address, IP protocols, UDP or TCP port numbers, and DSCP.
Modify ACLs
This topic describes how to modify existing access control lists (ACLs) on the Cisco 8000 Series Router by adding, deleting, and updating access control entries (ACEs).
TCP flags in ACLs
This topic describes how TCP flags are used in access control lists (ACLs) to permit or deny packets on the Cisco 8000 Series Router.