Once crucial way for a system to inform administrator by email. This can be done by using its internal Exim4 or other mailboxes. This section guides you on hardening Debian by enabling email notification.
These are the identified threats related to Debian Software.
By default, the local email system is not configured to send any email out to administrators for alert and etc.
By default, the services are not configured to send notification email to root account or administrators.
Here are the list if actions to counter the issues.
For local system, one must setup the email service for the local system to send. There is no specific recipe since it depends on the requirements (in some cases, a specific monitoring app can be deployed to handle all system monitoring so local system setup is unnecessary.
Here are some guides:
Once the email system is up, one should enable supported services to send email notifications. Among them are:
That's all for hardening Debian by enabling email notification.