October 2020
Intermediate to advanced
481 pages
17h 35m
English
Content preview from Network Security, Firewalls, and VPNs, 3rd Edition
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Authentication, Authorization, and Accounting
Security ultimately is supported and enforced by authentication, authorization, and accounting (AAA). AAA is part of field of security commonly referred to as identity and access management (IAM). Without all three of these security fundamentals properly implemented, real security cannot exist.
Authentication is the verification or proof of someone or something’s identity. The most common form of authentication is the use of a password. Although passwords are the most common, they are also one of the weakest forms of authentication. People typically pick passwords that are easy to guess or that are somehow predictable. They often reuse the same passwords on multiple systems.
Passwords reside in ...
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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.