Within the Horizon dashboard, security groups are managed within the Security Groups section under the Network tab:
Working with security groups in the dashboard
Creating a security group
To create a security group, perform the following steps.
Click on the Create Security Group button in the upper right-hand corner of the screen. A window will appear that will allow you to create a security group:
The Name field is required. When you are ready to proceed, click on the blue Create Security Group button to create the security group.
Managing security group rules
Once...