Security groups are network rules that allow instances in one tenant (project) be kept separate from other instances in another. Managing security group rules for our OpenStack instances is done as simply as possible with OpenStack Dashboard.
As described in Creating tenants recipe of Chapter 1 Keystone OpenStack Identity Service, projects and tenants are used interchangeably and refer to the same thing. Under the OpenStack Dashboard, tenants are referred to as projects whereas in Keystone projects are referred to as tenants.
Load a Web browser, point it to our OpenStack Dashboard address at
http://172.16.0.200/horizon, and log in as a user, such as the
demo user created in ...