The security of Linux, no Viruses, harder to hack than Windows.
For this purpose you need a server OS, for instance, windows server 2000, windows server 2003, windows server 2008 and so on or Linux based systems as well as Unix. For windows it's very simple just add role for your server to be a domain controller and follow instructions. For Linux based systems as well as Unix you can find information in Google there is a lot of it.
Kerberos is an authentication mechanism used to verify user or host identity. This page contains the information you need to evaluate, plan, and deploy Kerberos, the preferred authentication method for services in Windows Server 2003. NTLM for 2000
My advise would be to start with a flavor of Linux that closely resembles the Windows environment you're probably familiar with. I recommend Kubuntu Linux 4.01. It is widely available for download for free and you can choose it to run alongside Windows.
Cygwin is used to port applications that were written for Unix or Linux to a Windows environment.
CCProxy is a Windows application. It does not run natively on Linux and would be unsuitable for a production environment.
Preemptive (both Windows and Linux).
I could be linux, unix, windows flavour depending upon the the natuire of applicationan and environment.
Two operating systems are; Windows, and Linux.
Linux is considered to be more secure than Windows.
Vista Home Premium : Not Linux! Get linux! Vista Business : Not Linux! Get linux!
There is no such thing as "Windows Linux." Linux is not a version of Windows and has nothing at all to do with Windows. They are two totally completely different operating systems made by completely different people.