December 2018
Beginner
826 pages
22h 54m
English
Content preview from Linux Administration Cookbook
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iptables
Typically, you want to check the running configuration of a firewall on a box. To do this, you might use iptables -L:
$ sudo iptables -LChain INPUT (policy ACCEPT)target prot opt source destination ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHEDACCEPT all -- anywhere anywhere INPUT_direct all -- anywhere anywhere INPUT_ZONES_SOURCE all -- anywhere anywhere INPUT_ZONES all -- anywhere anywhere DROP all -- anywhere anywhere ctstate INVALIDREJECT all -- anywhere anywhere reject-with icmp-host-prohibitedChain FORWARD (policy ACCEPT)target prot opt source destination ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHEDACCEPT all -- anywhere anywhere FORWARD_direct all -- anywhere anywhere FORWARD_IN_ZONES_SOURCE all ...
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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.