| name | cis-gcp-foundations-6.2.2 |
| description | Ensure 'Log_connections' Database Flag for Cloud SQL PostgreSQL Instance Is Set to 'On' |
| category | cis-gcp-foundations |
| version | 4.0.0 |
| author | cyberstrike-official |
| tags | ["cis","gcp","cloud-sql","postgresql"] |
| cis_id | 6.2.2 |
| cis_benchmark | CIS Google Cloud Platform Foundation Benchmark v4.0.0 |
| tech_stack | ["gcp"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
6.2.2 Ensure That the 'Log_connections' Database Flag for Cloud SQL PostgreSQL Instance Is Set to 'On' (Automated)
Profile Applicability
Description
Enabling the log_connections setting causes each attempted connection to the server to be logged, along with successful completion of client authentication. This parameter cannot be changed after the session starts.
Rationale
PostgreSQL does not log attempted connections by default. Enabling the log_connections setting will create log entries for each attempted connection as well as successful completion of client authentication which can be useful in troubleshooting issues and to determine any unusual connection attempts to the server. This recommendation is applicable to PostgreSQL database instances.
Impact
Turning on logging will increase the required storage over time. Mismanaged logs may cause your storage costs to increase. Setting custom flags via command line on certain instances will cause all omitted flags to be reset to defaults. This may cause you to lose custom flags and could result in unforeseen complications or instance restarts. Because of this, it is recommended you apply these flags changes during a period of low usage.
Audit
From Google Cloud Console
- Go to the Cloud SQL Instances page in the Google Cloud Console by visiting https://console.cloud.google.com/sql/instances.
- Select the instance to open its
Instance Overview page.
- Go to the
Configuration card.
- Under
Database flags, check the value of log_connections flag to determine if it is configured as expected.
From Google Cloud CLI
- Ensure the below command returns
on for every Cloud SQL PostgreSQL database instance:
gcloud sql instances describe [INSTANCE_NAME] --format=json | jq '.settings.databaseFlags[] | select(.name=="log_connections")|.value'
In the output, database flags are listed under the settings as the collection databaseFlags.
Remediation
From Google Cloud Console
- Go to the Cloud SQL Instances page in the Google Cloud Console by visiting https://console.cloud.google.com/sql/instances.
- Select the PostgreSQL instance for which you want to enable the database flag.
- Click .
