Logging metric filter and alert for network route 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 route changes should be configured. Routes define the paths network traffic takes from a VM instance to another destination, which can be inside the same VPC network or outside of it. Monitoring changes to route tables helps prevent accidental or malicious changes that could result in either dropped packets or network hijacking.
How to fix?
Logging metric filter and alert for network route changes should be configured.
Example Configuration
resource "google_logging_metric" "logging_metric" {
name = "logging_metric"
filter = "resource.type=\"gce_route\" AND protoPayload.methodName:\"compute.routes.delete\" OR protoPayload.methodName:\"compute.routes.insert\""
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"
}
}
}