Do you know what ports in your server are open?
Do you know which services running in your server are not needed and can be safely turned off?
Do you know that removing unused services could make your server more secure and free up resources?
Are your servers patched up to the latest version of released software?
Do you have the latest antivirus definitions?
Have all detected viruses and malware have been cleaned out of your server?
Please keep in mind Server Management monitoring and its security is a way of life and a life style. It is a set of procedures and policies that must be malleable, and yet followed consistently.
There is no such thing as a one time hardening just like there is no such thing as a one time anti-virus install. As new threats or attacks arise, it’s important that you never allow yourself to feel too safe or too secure, always check things out, always be open to learning new security philosophies, and always be on the look out for suspicious activity on your machines.