February 2026
Intermediate to advanced
456 pages
17h 3m
English
Content preview from Digital Forensics, Investigation, and Response 5E, 5th Edition
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Firewall Forensics
Examining the firewall should be a fundamental part of any network forensic analysis. Since all external traffic must come through the firewall, it is imperative that the firewall’s logs be examined carefully. They frequently contain valuable evidence.
Firewall Basics
Before you delve too deep into firewall forensics, you should ensure you have a basic, working understanding of firewalls. There are several ways to categorize firewalls, but there are two that are more basic than the rest.
Packet Filter
This is the most basic type of firewall. It simply filters incoming packets and either allows them entrance or denies them entrance based on a set of rules that were put into its configuration. A packet filter is also referred ...
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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.