November 2002
Intermediate to advanced
800 pages
19h 58m
English
Content preview from Network Security Principles and PracticesBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Overview of Access Control Lists
Access control lists are essentially traffic filters that are used on routers to identify specific kinds of packets based on a packet attribute, such as the IP address. Access control lists can then be used to take specific actions after the packets have been identified, such as stopping them from passing through a specific interface.
Access control lists are comprised of a series of Access Control Elements (ACEs), each of which is a single rule designed to match a particular type of packet. An access list is a set of ACEs grouped and identified via a number or a name. An ACE defines the protocol it watches out for, any protocol options that are associated with that protocol, and whether the matching traffic is ...
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