Security

No matter what your OS is, it takes a knowledgeable and experience system administrator to ensure that a server is secure and can remain hack-proof. Not knowledgeable and experienced? Well that is why you are reading this.

Pick the OS so we can get specific:

Windows Security

Linux Security

FreeBSD Security

If you have a control panel, you should also read the article in addition to your OS. (It takes knowledge in both)

Cpanel Security

Interworx Security

Plesk Security

Stopping DoS Attacks