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OpenStack Networking Essentials by James Denton

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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 ...

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