After installing the operating system on each node for the architecture that you choose to deploy, you must configure the network interfaces. We recommend that you disable any automated network management tools and manually edit the appropriate configuration files for your distribution. For more information on how to configure networking on your distribution, see the documentation. documentation. documentation. SLES 11 or openSUSE documentation. # service NetworkManager stop # service network start # chkconfig NetworkManager off # chkconfig network on Use the YaST network module: # yast2 network For more information, see the SLES or the openSUSE documentation. RHEL and derivatives including CentOS and Scientific Linux enable a restrictive firewall by default. During this installation, certain steps will fail unless you alter or disable the firewall. For further information about securing your installation, refer to the OpenStack Security Guide. On Fedora, firewalld replaces iptables as the default firewall system. While you can use firewalld successfully, this guide references iptables for compatibility with other distributions. # service firewalld stop # service iptables start # chkconfig firewalld off # chkconfig iptables on Proceed to network configuration for the example OpenStack Networking (neutron) or legacy networking (nova-network) architecture.