April 2004
Intermediate to advanced
864 pages
20h 58m
English
Content preview from CCSP Self-Study: Securing Cisco IOS Networks (SECUR)Become 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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Implementing Cisco Access Control Lists
This section provides a review of basic Cisco ACL design and implementation.
Cisco routers use ACLs as packet filters to decide which packets to allow across an interface. Packets that are allowed across an interface are called permitted packets. Packets that are not allowed across an interface are called denied packets. ACLs contain one or more rules or statements that determine what data is to be permitted or denied across an interface.
ACLs are designed to enforce one or more corporate security policies. For example, suppose that one of your corporate security policies is to allow only one SNMP server to access the SNMP agents on your routers. Once this policy is written, you can develop an ACL that ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.