September 2007
Intermediate to advanced
336 pages
9h 7m
English
Content preview from Linux FirewallsBecome 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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Packet Filtering with iptables
The iptables firewall allows the user to instrument a high degree of control over IP packets that interact with a Linux system; that control is implemented within the Linux kernel. A policy can be constructed with iptables that acts as a vigorous traffic cop—packets that are not permitted to pass fall into oblivion and are never heard from again, whereas packets that pass muster are sent on their merry way or altered so that they conform to local network requirements.
An iptables policy is built from an ordered set of rules, which describe to the kernel the actions that should be taken against certain classes of packets. Each iptables rule is applied to a chain within a table. An iptables chain is a collection of ...
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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.