November 2015
Beginner
260 pages
6h 10m
English
Content preview from Mastering Linux Network AdministrationBecome 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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Configuring the iptables firewall
By default, Linux includes a firewall, iptables. This firewall should automatically be available on most (if not all) flavors of Linux. In this little activity, we'll set up a firewall on our Linux system. This should work fine regardless of which of the major distributions you use, but I'll call out anything that may be distribution specific. Before we get started though, I'll recommend that you play with this on a test machine, such as a VM or something you have physical access to. If you're using SSH, you may get disconnected when we enable the firewall, though I'll provide these steps in an order that hopefully, shouldn't drop your connection. Having a dedicated test machine to play around with is a good idea ...
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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.