Home > Storage > PowerFlex > White Papers > Dell PowerFlex Integration with Apache CloudStack > CloudStack Infrastructure: KVM Host setup
If firewalld is not disabled in the KVM hosts, then ensure that you open the following TCP ports for proper communication between KVM hosts and Management Server. Also update the settings in iptables and keep it persistent across reboots. For more information, see Configuring the firewall.
Now the host is ready to be added to the cluster.
For more information about the configuration, see KVM Host Installation.