Unite your Linux and Active Directory authentication
Authentication is easily one of the most critical services provided by your network infrastructure. It is the gatekeeper for every resource on your network. Workstations, applications, printers, and files would all be open to the world without a system of ensuring that only those people who need any given resource can gain access to it. Once you have accepted the fact that you need authentication, you must decide whether to stay with one network operating system in the interest of a completely homogenous network, or accept a "best of breed" system that will better fulfill your needs, even though it will complicate your environment. If you choose the second option, often times you are left with a management nightmare, where you have two, three, or even more authentication engines to maintain across your network operating systems.
By Eric Anderson at Linux.com
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