Cloud NAT 로그 수집

이 문서에서는 Google Security Operations에 대해 Google Cloud 원격 분석 수집을 사용 설정하여 Cloud NAT 로그를 수집하는 방법과 Cloud NAT 로그의 로그 필드가 Google Security Operations 통합 데이터 모델(UDM) 필드에 매핑되는 방법을 설명합니다.

자세한 내용은 Google Security Operations에 데이터 수집을 참조하세요.

일반적인 배포는 Google Security Operations에 대한 수집에 사용 설정된 Cloud NAT 로그로 구성됩니다. 각 고객 배포는 이 표현과 다를 수 있고 더 복잡할 수 있습니다.

배포에는 다음 구성요소가 포함됩니다.

• Google Cloud: 로그를 수집하는 Google Cloud 서비스 및 제품입니다.

• Cloud NAT 로그: Google Security Operations에 수집을 위해 사용 설정된 Cloud NAT 로그입니다.

• Google Security Operations: Google Security Operations에서는 Cloud NAT의 로그를 보관하고 분석합니다.

수집 라벨은 원시 로그 데이터를 구조화된 UDM 형식으로 정규화하는 파서를 식별합니다. 이 문서의 정보는 GCP_CLOUD_NAT 수집 라벨이 있는 파서에 적용됩니다.

시작하기 전에

• 배포 아키텍처의 모든 시스템이 UTC 시간대로 구성되었는지 확인합니다.

Cloud NAT 로그를 수집하도록 Google Cloud 구성

Google Security Operations에 로그를 수집하는 방법에 대한 자세한 내용은 Google Security Operations에 Google Cloud 로그 수집을 참조하세요.

Cloud NAT 로그를 수집할 때 문제가 발생하면 Google Security Operations 지원팀에 문의하세요.

필드 매핑 참조

이 섹션에서는 Google Security Operations 파서가 Cloud NAT 필드를 Google Security Operations 통합 데이터 모델(UDM) 필드에 매핑하는 방법을 설명합니다.

지원 중단됨:

UDM 명사의 labels 필드인 about.labels, intermediary.labels, observer.labels, principal.labels, src.labels, security_result.about.labels, target.labels가 지원 중단되었습니다. 기존 파서의 경우 이러한 UDM 필드 외에도 로그 필드가 키/값 additional.fields UDM 필드에 매핑됩니다. 새 파서의 경우 지원 중단된 labels UDM 필드 대신 additional.fields UDM 필드의 키-값 설정이 사용됩니다. 지원 중단된 labels UDM 필드 대신 additional.fields UDM 필드에서 키-값 설정을 사용하도록 기존 규칙을 업데이트하는 것이 좋습니다.

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]

다음 단계

• Google Security Operations에 데이터 수집