Control: 4.3.3 Ensure server parameter 'log_connections' is set to 'ON' for PostgreSQL Database Server

Description

Enable log_connections on PostgreSQL Servers.

Enabling log_connections helps PostgreSQL Database to log attempted connection to the server, as well as successful completion of client authentication. Log data can be used to identify, troubleshoot, and repair configuration errors and suboptimal performance.

Remediation

From Azure Portal

Login to Azure Portal using https://portal.azure.com.
Go to Azure Database for PostgreSQL servers.
For each database, click on Server parameters.
Search for log_connections.
Click ON and save.

From Azure CLI

Use the below command to update log_connections configuration.

az postgres server configuration set --resource-group <resourceGroupName> --server-name <serverName> --name log_connections --value on

From PowerShell

Use the below command to update log_connections configuration.

Update-AzPostgreSqlConfiguration -ResourceGroupName <ResourceGroupName> - ServerName <ServerName> -Name log_connections -Value on

Default Value

By default log_connections is enabled (set to on).

Usage

Run the control in your terminal:

powerpipe control run azure_compliance.control.cis_v210_4_3_3

Snapshot and share results via Turbot Pipes:

powerpipe login
powerpipe control run azure_compliance.control.cis_v210_4_3_3 --share

SQL

This control uses a named query:

select
  s.id as resource,
  case
    when lower(config -> 'ConfigurationProperties' ->> 'value') != 'on' then 'alarm'
    else 'ok'
  end as status,
  case
    when lower(config -> 'ConfigurationProperties' ->> 'value') != 'on' then s.name || ' server parameter log_connections off.'
    else s.name || ' server parameter log_connections on.'
  end as reason
  
  , s.resource_group as resource_group
  , sub.display_name as subscription
from
  azure_postgresql_server s
  cross join lateral jsonb_array_elements(server_configurations) config
  left join azure_subscription as sub on sub.subscription_id = s.subscription_id
where
  config ->> 'Name' = 'log_connections';