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OpenStack Networking Essentials

You're reading from   OpenStack Networking Essentials Build and manage networks in OpenStack using Neutron

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Product type Paperback
Published in Apr 2016
Publisher Packt
ISBN-13 9781785283277
Length 174 pages
Edition 1st Edition
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Authors (2):
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James Denton James Denton
Author Profile Icon James Denton
James Denton
Derek Chamorro Derek Chamorro
Author Profile Icon Derek Chamorro
Derek Chamorro
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Toc

Managing security groups


Security groups can be managed using the Neutron CLI or the Horizon dashboard. From within the Neutron command-line client, a number of commands can be used to manage security groups, including:

  • security-group-create

  • security-group-delete

  • security-group-list

  • security-group-rule-create

  • security-group-rule-delete

  • security-group-rule-list

  • security-group-rule-show

  • security-group-show

  • security-group-update

From the Horizon dashboard, security groups and rules are managed from the Compute | Access & Security panel.

Using CIDR to control traffic

Understanding how to properly subnet networks using the Classless Inter-Domain Routing (CIDR) notation is important for controlling access to instances. Using the wrong CIDR notation in a security group rule can expose your application and your environment to the Bad Guys™, a situation we'd like to prevent.

The following are some examples of networks using CIDR notation:

  • 0.0.0.0/0 – This would allow traffic from all IP...

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