October 2020
Intermediate to advanced
481 pages
17h 35m
English
Content preview from Network Security, Firewalls, and VPNs, 3rd Edition
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Fragmentation Attacks
Fragmentation attacks are an abuse of the fragmentation offset feature of IP packets. Fragmentation occurs when there are many different network links connected to construct a global infrastructure. Some network segments support smaller datagrams (another term for packet or frame) than others, so larger datagrams are fragmented into the smaller, more compatible size. When the fragmented elements of the original datagram reassemble, manipulations of fragmentation can cause several potentially malicious reconstructions, such as overlapping and overrun. Think of the transporter on Star Trek: If anything gets in the way of the reassembly of the person being transported, you might end up with an evil Mr. Spock with a goatee. ...
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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.