you need to config firewall_driver = nova.virt.libvirt.firewall.IptablesFirewallDriver, unfortunately a default devstack install now config it as firewall_driver="nova.virt.firewall.NoopFirewallDriver when using Neutron. so this may be a devstack bug.
you need to config firewall_driver = nova.virt. libvirt. firewall. IptablesFirewal lDriver, unfortunately a default devstack install now config it as firewall_ driver= "nova.virt. firewall. NoopFirewallDri ver when using Neutron. so this may be a devstack bug.