cause property

Cause that the packet is dropped. Possible string values are:

• "CAUSE_UNSPECIFIED" : Cause is unspecified.
• "UNKNOWN_EXTERNAL_ADDRESS" : Destination external address cannot be resolved to a known target. If the address is used in a Google Cloud project, provide the project ID as test input.
• "FOREIGN_IP_DISALLOWED" : A Compute Engine instance can only send or receive a packet with a foreign IP address if ip_forward is enabled.
• "FIREWALL_RULE" : Dropped due to a firewall rule, unless allowed due to connection tracking.
• "NO_ROUTE" : Dropped due to no matching routes.
• "ROUTE_BLACKHOLE" : Dropped due to invalid route. Route's next hop is a blackhole.
• "ROUTE_WRONG_NETWORK" : Packet is sent to a wrong (unintended) network. Example: you trace a packet from VM1:Network1 to VM2:Network2, however, the route configured in Network1 sends the packet destined for VM2's IP address to Network3.
• "ROUTE_NEXT_HOP_IP_ADDRESS_NOT_RESOLVED" : Route's next hop IP address cannot be resolved to a GCP resource.
• "ROUTE_NEXT_HOP_RESOURCE_NOT_FOUND" : Route's next hop resource is not found.
• "ROUTE_NEXT_HOP_INSTANCE_WRONG_NETWORK" : Route's next hop instance doesn't hace a NIC in the route's network.
• "ROUTE_NEXT_HOP_INSTANCE_NON_PRIMARY_IP" : Route's next hop IP address is not a primary IP address of the next hop instance.
• "ROUTE_NEXT_HOP_FORWARDING_RULE_IP_MISMATCH" : Route's next hop forwarding rule doesn't match next hop IP address.
• "ROUTE_NEXT_HOP_VPN_TUNNEL_NOT_ESTABLISHED" : Route's next hop VPN tunnel is down (does not have valid IKE SAs).
• "ROUTE_NEXT_HOP_FORWARDING_RULE_TYPE_INVALID" : Route's next hop forwarding rule type is invalid (it's not a forwarding rule of the internal passthrough load balancer).
• "NO_ROUTE_FROM_INTERNET_TO_PRIVATE_IPV6_ADDRESS" : Packet is sent from the Internet to the private IPv6 address.
• "VPN_TUNNEL_LOCAL_SELECTOR_MISMATCH" : The packet does not match a policy-based VPN tunnel local selector.
• "VPN_TUNNEL_REMOTE_SELECTOR_MISMATCH" : The packet does not match a policy-based VPN tunnel remote selector.
• "PRIVATE_TRAFFIC_TO_INTERNET" : Packet with internal destination address sent to the internet gateway.
• "PRIVATE_GOOGLE_ACCESS_DISALLOWED" : Instance with only an internal IP address tries to access Google API and services, but private Google access is not enabled in the subnet.
• "PRIVATE_GOOGLE_ACCESS_VIA_VPN_TUNNEL_UNSUPPORTED" : Source endpoint tries to access Google API and services through the VPN tunnel to another network, but Private Google Access needs to be enabled in the source endpoint network.
• "NO_EXTERNAL_ADDRESS" : Instance with only an internal IP address tries to access external hosts, but Cloud NAT is not enabled in the subnet, unless special configurations on a VM allow this connection.
• "UNKNOWN_INTERNAL_ADDRESS" : Destination internal address cannot be resolved to a known target. If this is a shared VPC scenario, verify if the service project ID is provided as test input. Otherwise, verify if the IP address is being used in the project.
• "FORWARDING_RULE_MISMATCH" : Forwarding rule's protocol and ports do not match the packet header.
• "FORWARDING_RULE_NO_INSTANCES" : Forwarding rule does not have backends configured.
• "FIREWALL_BLOCKING_LOAD_BALANCER_BACKEND_HEALTH_CHECK" : Firewalls block the health check probes to the backends and cause the backends to be unavailable for traffic from the load balancer. For more details, see Health check firewall rules.
• "INSTANCE_NOT_RUNNING" : Packet is sent from or to a Compute Engine instance that is not in a running state.
• "GKE_CLUSTER_NOT_RUNNING" : Packet sent from or to a GKE cluster that is not in running state.
• "CLOUD_SQL_INSTANCE_NOT_RUNNING" : Packet sent from or to a Cloud SQL instance that is not in running state.
• "TRAFFIC_TYPE_BLOCKED" : The type of traffic is blocked and the user cannot configure a firewall rule to enable it. See Always blocked traffic for more details.
• "GKE_MASTER_UNAUTHORIZED_ACCESS" : Access to Google Kubernetes Engine cluster master's endpoint is not authorized. See Access to the cluster endpoints for more details.
• "CLOUD_SQL_INSTANCE_UNAUTHORIZED_ACCESS" : Access to the Cloud SQL instance endpoint is not authorized. See Authorizing with authorized networks for more details.
• "DROPPED_INSIDE_GKE_SERVICE" : Packet was dropped inside Google Kubernetes Engine Service.
• "DROPPED_INSIDE_CLOUD_SQL_SERVICE" : Packet was dropped inside Cloud SQL Service.
• "GOOGLE_MANAGED_SERVICE_NO_PEERING" : Packet was dropped because there is no peering between the originating network and the Google Managed Services Network.
• "GOOGLE_MANAGED_SERVICE_NO_PSC_ENDPOINT" : Packet was dropped because the Google-managed service uses Private Service Connect (PSC), but the PSC endpoint is not found in the project.
• "GKE_PSC_ENDPOINT_MISSING" : Packet was dropped because the GKE cluster uses Private Service Connect (PSC), but the PSC endpoint is not found in the project.
• "CLOUD_SQL_INSTANCE_NO_IP_ADDRESS" : Packet was dropped because the Cloud SQL instance has neither a private nor a public IP address.
• "GKE_CONTROL_PLANE_REGION_MISMATCH" : Packet was dropped because a GKE cluster private endpoint is unreachable from a region different from the cluster's region.
• "PUBLIC_GKE_CONTROL_PLANE_TO_PRIVATE_DESTINATION" : Packet sent from a public GKE cluster control plane to a private IP address.
• "GKE_CONTROL_PLANE_NO_ROUTE" : Packet was dropped because there is no route from a GKE cluster control plane to a destination network.
• "CLOUD_SQL_INSTANCE_NOT_CONFIGURED_FOR_EXTERNAL_TRAFFIC" : Packet sent from a Cloud SQL instance to an external IP address is not allowed. The Cloud SQL instance is not configured to send packets to external IP addresses.
• "PUBLIC_CLOUD_SQL_INSTANCE_TO_PRIVATE_DESTINATION" : Packet sent from a Cloud SQL instance with only a public IP address to a private IP address.
• "CLOUD_SQL_INSTANCE_NO_ROUTE" : Packet was dropped because there is no route from a Cloud SQL instance to a destination network.
• "CLOUD_FUNCTION_NOT_ACTIVE" : Packet could be dropped because the Cloud Function is not in an active status.
• "VPC_CONNECTOR_NOT_SET" : Packet could be dropped because no VPC connector is set.
• "VPC_CONNECTOR_NOT_RUNNING" : Packet could be dropped because the VPC connector is not in a running state.
• "FORWARDING_RULE_REGION_MISMATCH" : Packet could be dropped because it was sent from a different region to a regional forwarding without global access.
• "PSC_CONNECTION_NOT_ACCEPTED" : The Private Service Connect endpoint is in a project that is not approved to connect to the service.
• "PSC_ENDPOINT_ACCESSED_FROM_PEERED_NETWORK" : The packet is sent to the Private Service Connect endpoint over the peering, but it's not supported.
• "PSC_NEG_PRODUCER_ENDPOINT_NO_GLOBAL_ACCESS" : The packet is sent to the Private Service Connect backend (network endpoint group), but the producer PSC forwarding rule does not have global access enabled.
• "PSC_NEG_PRODUCER_FORWARDING_RULE_MULTIPLE_PORTS" : The packet is sent to the Private Service Connect backend (network endpoint group), but the producer PSC forwarding rule has multiple ports specified.
• "NO_NAT_SUBNETS_FOR_PSC_SERVICE_ATTACHMENT" : No NAT subnets are defined for the PSC service attachment.
• "HYBRID_NEG_NON_DYNAMIC_ROUTE_MATCHED" : The packet sent from the hybrid NEG proxy matches a non-dynamic route, but such a configuration is not supported.
• "HYBRID_NEG_NON_LOCAL_DYNAMIC_ROUTE_MATCHED" : The packet sent from the hybrid NEG proxy matches a dynamic route with a next hop in a different region, but such a configuration is not supported.
• "CLOUD_RUN_REVISION_NOT_READY" : Packet sent from a Cloud Run revision that is not ready.
• "DROPPED_INSIDE_PSC_SERVICE_PRODUCER" : Packet was dropped inside Private Service Connect service producer.
• "LOAD_BALANCER_HAS_NO_PROXY_SUBNET" : Packet sent to a load balancer, which requires a proxy-only subnet and the subnet is not found.
• "CLOUD_NAT_NO_ADDRESSES" : Packet sent to Cloud Nat without active NAT IPs.