If you are running a VPS for a live website, basic firewall settings alone usually leave a lot unchecked.
SSH access, unused ports, login protection and unnecessary services all need attention as well.
A weak configuration can become a problem even if the website itself is fully updated.
It is better to review the server before putting important client or business data on it.
Serverly also offers server hardening services covering these kinds of security checks.
You can use a service like this if you do not want to handle every server-level setting manually.
Regular security reviews are also useful after major software or server changes.
A properly configured server is much easier to maintain in the long run.
Forum