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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Setting Up Whitelists and Blacklists
Any software that can block network communications based on application layer data should also be able to exclude certain networks or IP addresses from any blocking actions based on a whitelist. At the same time, it should be able to force all packets to or from certain networks or IP addresses to be dropped according to a blacklist.
Whitelists and blacklists are supported by fwsnort with the WHITELIST and BLACKLIST variables in the /etc/fwsnort/fwsnort.conf file. For example, to ensure that fwsnort never takes action against communications that originate from or are destined for the webserver (IP address 192.168.10.3 in Figure 1-2), and to DROP all packets to or from the IP address 192.168.10.200,[63] include ...
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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.