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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Mitigating Security Threats by Using ACLs
This section explains how to use ACLs to mitigate common perimeter router security threats.
As a review, always apply the following general rules when deciding how to handle router services, ports, and protocols:
Disable unused services, ports, or protocols— If no one, including the router itself, needs to use an enabled service, port, or protocol, disable that service, port, or protocol.
Limit access to services, ports, or protocols— If a limited number of users or systems require access to an enabled router service, port, or protocol, limit access to that service, port, or protocol by using ACLs.
Filtering Traffic
ACLs are important because they act as traffic filters between the corporate (trusted) ...
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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.
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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.