October 2016
Intermediate to advanced
216 pages
4h 10m
English
Content preview from Software-Defined Networking (SDN) with OpenStackBecome 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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Securing network traffic in OpenStack
The security of network traffic is critical, and OpenStack supports two mechanisms to secure network traffic. Security Groups allow traffic within a tenant's network to be secured. Linux iptables on the compute nodes are used to implement OpenStack security groups.
The traffic that goes outside of a tenant's network, to another network or the Internet, is secured using the OpenStack firewall service functionality. Like routing, firewall is a service with Neutron. The firewall service also uses iptables, but the scope of iptables is limited to the OpenStack router used as part of the firewall service.
The following diagram describes at a high level how iptables are used to secure network traffic:
In this network ...
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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.