Answer by jdiaz9 for Hello all I am new to the Openstack world and have been having a trouble getting connectivity to and from my VM instances. I am unable to ping them from the outside, but the VMs create can ping each other. I have installed Openstack in single node configuration using the Openstack-installer, using Juno. I do not know what .conf file needed to help being trouble shooting so I am going to provide some basic ones and if more are required I can add them later. Thanks in advance for your help I am only cracking the surface into Openstack and am hoping to delve further into it. Controller node neutron.conf [DEFAULT] state_path = /var/lib/neutron lock_path = $state_path/lock bind_host = 0.0.0.0 auth_strategy = keystone notification_driver = neutron.openstack.common.notifier.rpc_notifier api_workers = 2 use_syslog = False bind_port = 9686 core_plugin = neutron.plugins.ml2.plugin.Ml2Plugin service_plugins = neutron.services.l3_router.l3_router_plugin.L3RouterPlugin,neutron.services.firewall.fwaas_plugin.FirewallPlugin,neutron.services.loadbalancer.plugin.LoadBalancerPlugin,neutron.services.vpn.plugin.VPNDriverPlugin,neutron.services.metering.metering_plugin.MeteringPlugin allow_overlapping_ips = True neutron_firewall_driver = neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver rabbit_userid = nova rabbit_virtual_host = openstack rabbit_password = FWxn6xYzXb5ScpPnShxmfNF7TktLzcc74mctfY4GW5fZBZZyBX63NrrdT9YyZY38 rabbit_host = 10.0.4.72 notify_nova_on_port_status_changes = True notify_nova_on_port_data_changes = True nova_url = http://10.0.4.81:8774/v2 nova_region_name = RegionOne nova_admin_username = s3_ec2_nova nova_admin_tenant_id = 5e85fecd26da46c9bc6c9a43fb023e4f nova_admin_password = x9JMmw5BytwMht6scPqtZpzSMFZfpBB4gf9h8RxTLLHX8y8qzkjF9k98KRHK82h8 nova_admin_auth_url = http://10.0.4.125:35357/v2.0 [quotas] quota_driver = neutron.db.quota_db.DbQuotaDriver quota_items = network,subnet,port,security_group,security_group_rule [agent] root_helper = sudo /usr/bin/neutron-rootwrap /etc/neutron/rootwrap.conf [keystone_authtoken] signing_dir = $state_path/keystone-signing service_protocol = http service_host = 10.0.4.125 service_port = 5000 auth_host = 10.0.4.125 auth_port = 35357 auth_protocol = http admin_tenant_name = services admin_user = s3_ec2_nova admin_password = x9JMmw5BytwMht6scPqtZpzSMFZfpBB4gf9h8RxTLLHX8y8qzkjF9k98KRHK82h8 [database] connection = mysql://neutron:pv2CkdMR4G8nRfE1@10.0.4.187/neutron [service_providers] service_provider=LOADBALANCER:Haproxy:neutron.services.loadbalancer.drivers.haproxy.plugin_driver.HaproxyOnHostPluginDriver:default service_provider=VPN:openswan:neutron.services.vpn.service_drivers.ipsec.IPsecVPNDriver:default service_provider=FIREWALL:Iptables:neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver:default Controller nova.conf [DEFAULT] verbose=False debug=False dhcpbridge_flagfile=/etc/nova/nova.conf dhcpbridge=/usr/bin/nova-dhcpbridge logdir=/var/log/nova state_path=/var/lib/nova lock_path=/var/lock/nova force_dhcp_release=True iscsi_helper=tgtadm libvirt_use_virtio_for_bridges=True connection_type=libvirt root_helper=sudo nova-rootwrap /etc/nova/rootwrap.conf ec2_private_dns_show_ip=True api_paste_config=/etc/nova/api-paste.ini volumes_path=/var/lib/nova/volumes enabled_apis=ec2,osapi_compute,metadata auth_strategy=keystone compute_driver=libvirt.LibvirtDriver use_ipv6 = False osapi_compute_listen = 0.0.0.0 metadata_host = 0.0.0.0 s3_listen = 0.0.0.0 ec2_listen = 0.0.0.0 osapi_compute_workers = 2 ec2_workers = 2 scheduler_default_filters = RetryFilter,AvailabilityZoneFilter,CoreFilter,RamFilter,ComputeFilter,ComputeCapabilitiesFilter,ImagePropertiesFilter,ServerGroupAntiAffinityFilter,ServerGroupAffinityFilter cpu_allocation_ratio = 16 ram_allocation_ratio = 1.5 use_syslog=False my_ip = 10.0.4.81 keystone_ec2_url = http://10.0.4.125:5000/v2.0/ec2tokens rabbit_userid = nova rabbit_virtual_host = openstack rabbit_password = FWxn6xYzXb5ScpPnShxmfNF7TktLzcc74mctfY4GW5fZBZZyBX63NrrdT9YyZY38 rabbit_host = 10.0.4.72 glance_api_servers = http://10.0.4.177:9292 libvirt_vif_driver = nova.virt.libvirt.vif.LibvirtGenericVIFDriver libvirt_user_virtio_for_bridges = True security_group_api = neutron nova_firewall_driver = nova.virt.firewall.NoopFirewallDriver default_floating_pool = ext_net network_api_class = nova.network.neutronv2.api.API neutron_url = http://10.0.4.140:9696 neutron_auth_strategy = keystone neutron_admin_tenant_name = services neutron_admin_username = s3_ec2_nova neutron_admin_password = x9JMmw5BytwMht6scPqtZpzSMFZfpBB4gf9h8RxTLLHX8y8qzkjF9k98KRHK82h8 neutron_admin_auth_url = http://10.0.4.125:35357/v2.0 s3_listen_port = 3323 osapi_compute_listen_port ... (more)

What IP address are you using to ping the instance? If you are using the floating IP then you will need to open up the ICMP rule in the security group in order to ping successfully.