Logging metric filter and alert for network changes should be configured Affecting Cloud Platform service in Google
CCSS (Common Configuration Scoring System) is a set of measures used to determine the severity of the rule.
Each rule is associated with a high-level category. For example IAM, Container, Monitoring, Logging, Network, etc.
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Description
Logging metric filter and alert for network changes should be configured. Network traffic flow can be impacted when a network is created, modified, or deleted, or when a network peering connection is created or deleted. Such changes can also indicate suspicious activity. Monitoring changes to VPCs can help detect anomalous actions and ensure traffic flow is not impacted.
How to fix?
Logging metric filter and alert for network changes should be configured.
Example Configuration
resource "google_logging_metric" "logging_metric" {
name = "logging_metric"
filter = "resource.type=gce_network AND protoPayload.methodName:\"compute.networks.insert\" OR protoPayload.methodName:\"compute.networks.patch\" OR protoPayload.methodName:\"compute.networks.delete\" OR protoPayload.methodName:\"compute.networks.removePeering\" OR protoPayload.methodName:\"compute.networks.addPeering\""
metric_descriptor {
value_type = "INT64"
metric_kind = "DELTA"
}
}
resource "google_monitoring_alert_policy" "alert_policy" {
depends_on = [google_logging_metric.logging_metric]
display_name = "Alert Policy"
combiner = "OR"
conditions {
display_name = "condition"
condition_threshold {
filter = "resource.type=\"global\" metric.type=\"logging.googleapis.com/user/logging_metric\""
duration = "60s"
comparison = "COMPARISON_GT"
}
}
}