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