Answer by Bernd Bausch for In the dashboard: Under the Project -> Compute -> Instances: I new create a instace, named test02, and its ip address is :10.0.0.7 and the floating ip is 172.24.4.12, I just want to know can I config the floating ip to a public ip, so the public network can access it.

To do this, you need to deploy your cloud so that the external network corresponds to a physical network. The principle is shown in the installation tutorials and the [networking guide](https://docs.openstack.org/ocata/networking-guide/deploy.html), but depending on the deployment mechanism you used, other steps are required. [Devstack instructions](https://docs.openstack.org/developer/devstack/guides/neutron.html) [Packstack instructions](https://community.redhat.com/blog/2015/01/rdo-quickstart-doing-the-neutron-dance/)