Cloud NAT-Logs erfassen

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In diesem Dokument wird beschrieben, wie Sie Cloud NAT-Logs erfassen können, indem Sie die Aufnahme von Google Cloud-Telemetriedaten in Google Security Operations aktivieren. Außerdem wird beschrieben, wie Logfelder der Cloud NAT-Logs den Feldern des einheitlichen Datenmodells von Google Security Operations (UDM) zugeordnet werden.

Weitere Informationen finden Sie unter Datenaufnahme in Google Security Operations.

Eine typische Bereitstellung besteht aus Cloud NAT-Logs, die für die Aufnahme in Google Security Operations aktiviert sind. Jede Kundenbereitstellung kann von dieser Darstellung abweichen und komplexer sein.

Das Deployment enthält die folgenden Komponenten:

  • Google Cloud: Die Google Cloud-Dienste und -Produkte, für die Sie Logs erfassen.

  • Cloud NAT-Logs: Cloud NAT-Logs, die für die Aufnahme in Google Security Operations aktiviert sind.

  • Google Security Operations: Google Security Operations speichert und analysiert die Logs von Cloud NAT.

Mit einem Datenaufnahmelabel wird der Parser identifiziert, der Roh-Logdaten in das strukturierte UDM-Format normalisiert. Die Informationen in diesem Dokument beziehen sich auf den Parser mit dem Datenaufnahmelabel GCP_CLOUD_NAT.

Hinweise

  • Achten Sie darauf, dass alle Systeme in der Bereitstellungsarchitektur in der UTC-Zeitzone konfiguriert sind.

Google Cloud für die Aufnahme von Cloud NAT-Logs konfigurieren

Weitere Informationen zum Aufnehmen von Logs in Google Security Operations finden Sie unter Google Cloud-Logs in Google Security Operations aufnehmen.

Wenn beim Aufnehmen von Cloud NAT-Logs Probleme auftreten, wenden Sie sich an den Google Security Operations-Support.

Feldzuordnungsreferenz

In diesem Abschnitt wird erläutert, wie der Google Security Operations-Parser die Cloud NAT-Felder den Google Security Operations Unified Data Model-Feldern (UDM) zuordnet.

Log field UDM mapping Logic
metadata.event_type The metadata.event_type UDM field is set to NETWORK_CONNECTION.
metadata.product_name The metadata.product_name UDM field is set to GCP Cloud NAT.
metadata.vendor_name The metadata.vendor_name UDM field is set to Google Cloud Platform.
receiveTimestamp metadata.collected_timestamp
timestamp metadata.event_timestamp
logName security_result.category_details
insertId metadata.product_log_id
network.direction The network.direction UDM field is set to OUTBOUND.
network.ip_protocol If the jsonPayload.connection.protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to ICMP.
  • 1
  • ICMP
  • ICMPV6
  • 58
  • 1.0
  • 58.0
Else, if the jsonPayload.connection.protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to IGMP.
  • 2
  • IGMP
  • 2.0
Else, if the jsonPayload.connection.protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to TCP.
  • 6
  • TCP
  • 6.0
Else, if the jsonPayload.connection.protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to UDP.
  • 17
  • UDP
  • 17.0
Else, if the jsonPayload.connection.protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to IP6IN4.
  • 41
  • IP6IN4
  • 41.0
Else, if the jsonPayload.connection.protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to GRE.
  • 47
  • GRE
  • 47.0
Else, if the jsonPayload.connection.protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to ESP.
  • 50
  • ESP
  • 50.0
Else, if the jsonPayload.connection.protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to EIGRP.
  • 88
  • EIGRP
  • 88.0
Else, if the jsonPayload.connection.protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to ETHERIP.
  • 97
  • ETHERIP
  • 97.0
Else, if the jsonPayload.connection.protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to PIM.
  • 103
  • PIM
  • 103.0
Else, if the jsonPayload.connection.protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to VRRP.
  • 112
  • VRRP
  • 112.0
jsonPayload.connection.src_ip principal.ip
jsonPayload.connection.src_port principal.port
jsonPayload.connection.nat_ip principal.nat_ip
jsonPayload.connection.nat_port principal.nat_port
jsonPayload.vpc.project_id intermediary.resource_ancestors.name If the jsonPayload.vpc.project_id log field value is not empty, then the //cloudresourcemanager.googleapis.com/projects/%{jsonPayload.vpc.project_id} log field is mapped to the intermediary.resource_ancestors.name UDM field.
intermediary.resource_ancestors.resource_type If the jsonPayload.vpc.project_id log field value is not empty, then the intermediary.resource_ancestors.resource_type UDM field is set to CLOUD_PROJECT.
intermediary.resource_ancestors.attribute.cloud.environment If the jsonPayload.vpc.project_id log field value is not empty, then the intermediary.resource_ancestors.attribute.cloud.environment UDM field is set to GOOGLE_CLOUD_PLATFORM.
jsonPayload.vpc.vpc_name intermediary.resource_ancestors.name
intermediary.resource_ancestors.resource_type If the jsonPayload.vpc.vpc_name log field value is not empty or the jsonPayload.vpc.subnetwork_name log field value is not empty, then the intermediary.resource_ancestors.resource_type UDM field is set to VPC_NETWORK.
intermediary.resource_ancestors.attribute.cloud.environment If the jsonPayload.vpc.vpc_name log field value is not empty or the jsonPayload.vpc.subnetwork_name log field value is not empty, then the intermediary.resource_ancestors.attribute.cloud.environment UDM field is set to GOOGLE_CLOUD_PLATFORM.
jsonPayload.vpc.subnetwork_name intermediary.resource_ancestors.attribute.labels [vpc_subnetwork_name]
jsonPayload.gateway_identifiers.gateway_name intermediary.resource.name
intermediary.resource.resource_type If the jsonPayload.gateway_identifiers.gateway_name log field value is not empty or the resource.type log field value is not empty or the resource.labels.region log field value is not empty or the jsonPayload.gateway_identifiers.router_name log field value is not empty or the resource.labels.router_id log field value is not empty, then the intermediary.resource.resource_type UDM field is set to BACKEND_SERVICE.
resource.type intermediary.resource.resource_subtype
jsonPayload.gateway_identifiers.region intermediary.location.name
intermediary.resource.attribute.cloud.environment If the jsonPayload.gateway_identifiers.gateway_name log field value is not empty or the resource.type log field value is not empty or the resource.labels.region log field value is not empty or the jsonPayload.gateway_identifiers.router_name log field value is not empty or the resource.labels.router_id log field value is not empty, then the intermediary.resource.attribute.cloud.environment UDM field is set to GOOGLE_CLOUD_PLATFORM.
resource.labels.region intermediary.resource.attribute.cloud.availability_zone
jsonPayload.gateway_identifiers.router_name intermediary.resource.attribute.labels [gateway_identifiers_router_name]
resource.labels.router_id intermediary.resource.attribute.labels [resource_labels_router_id]
jsonPayload.endpoint.project_id principal.resource_ancestors.name If the jsonPayload.endpoint.project_id log field value is not empty, then the //cloudresourcemanager.googleapis.com/projects/%{jsonPayload.endpoint.project_id} log field is mapped to the principal.resource_ancestors.name UDM field.
principal.resource_ancestors.resource_type If the jsonPayload.endpoint.project_id log field value is not empty, then the principal.resource_ancestors.resource_type UDM field is set to CLOUD_PROJECT.
principal.resource_ancestors.attribute.cloud.environment If the jsonPayload.endpoint.project_id log field value is not empty, then the principal.resource_ancestors.attribute.cloud.environment UDM field is set to GOOGLE_CLOUD_PLATFORM.
jsonPayload.endpoint.vm_name principal.hostname
jsonPayload.endpoint.vm_name principal.asset.hostname
jsonPayload.endpoint.vm_name principal.resource.name
principal.resource.resource_type If the jsonPayload.endpoint.vm_name log field value is not empty or the jsonPayload.endpoint.zone log field value is not empty, then the principal.resource.resource_type UDM field is set to VIRTUAL_MACHINE.
principal.resource.attribute.cloud.environment If the jsonPayload.endpoint.vm_name log field value is not empty or the jsonPayload.endpoint.zone log field value is not empty, then the principal.resource.attribute.cloud.environment UDM field is set to GOOGLE_CLOUD_PLATFORM.
jsonPayload.endpoint.zone principal.resource.attribute.cloud.availability_zone
jsonPayload.endpoint.region principal.location.name
jsonPayload.connection.dest_ip target.ip
jsonPayload.connection.dest_port target.port
jsonPayload.destination.geo_location.city target.location.city
jsonPayload.destination.geo_location.country target.location.country_or_region
jsonPayload.destination.geo_location.region target.location.name
jsonPayload.destination.geo_location.continent target.labels [destination_geo_location_continent] (deprecated)
jsonPayload.destination.geo_location.continent additional.fields [destination_geo_location_continent]
jsonPayload.destination.geo_location.asn network.asn
jsonPayload.destination.instance.project_id target.resource_ancestors.name If the jsonPayload.destination.instance.project_id log field value is not empty, then the //cloudresourcemanager.googleapis.com/projects/%{jsonPayload.destination.instance.project_id} log field is mapped to the target.resource_ancestors.name UDM field.
target.resource_ancestors.resource_type If the jsonPayload.destination.instance.project_id log field value is not empty, then the target.resource_ancestors.resource_type UDM field is set to CLOUD_PROJECT.
target.resource_ancestors.attribute.cloud.environment If the jsonPayload.destination.instance.project_id log field value is not empty, then the target.resource_ancestors.attribute.cloud.environment UDM field is set to GOOGLE_CLOUD_PLATFORM.
jsonPayload.destination.instance.vm_name target.hostname
jsonPayload.destination.instance.vm_name target.asset.hostname
jsonPayload.destination.instance.vm_name target.resource.name
target.resource.resource_type If the jsonPayload.destination.instance.vm_name log field value is not empty, then the target.resource_ancestors.resource_type UDM field is set to VIRTUAL_MACHINE.
target.resource.attribute.cloud.environment If the jsonPayload.destination.instance.vm_name log field value is not empty, then the target.resource.attribute.cloud.environment UDM field is set to GOOGLE_CLOUD_PLATFORM.
jsonPayload.destination.instance.zone target.resource.attribute.cloud.availability_zone
jsonPayload.destination.instance.region target.location.name If the jsonPayload.destination.geo_location.region log field value is empty, then the jsonPayload.destination.instance.region log field is mapped to the target.location.name UDM field.
security_result.action If the jsonPayload.allocation_status log field value is equal to OK, then the security_result.action UDM field is set to ALLOW.

Else, if the jsonPayload.allocation_status log field value is equal to DROPPED, then the security_result.action UDM field is set to BLOCK.
jsonPayload.allocation_status security_result.action_details
labels about.resource.attribute.labels
resource.labels.project_id about.resource.attribute.labels [resource_project_id] If the resource.labels.project_id log field value is not empty, then the //cloudresourcemanager.googleapis.com/projects/%{resource.labels.project_id} log field is mapped to the about.resource.attribute.labels.resource_project_id UDM field.
resource.labels.gateway_name about.resource.attribute.labels [resource_gateway_name]

Nächste Schritte