Implementing and supporting 802.1X authentication on your network can be a challenge, but here are some tips that can help save you some time, money, and frustration.
1. Consider a Free or Low-Cost RADIUS Server
For small and midsized networks, you don't have to spend a fortune on a RADIUS (remote authentication dial-in user service) server. First check if your router platform, directory service, or any other server provides RADIUS/AAA (authentication, authorization, accounting) for you already. For example, if you're running an Active Directory domain with a Windows Server, look into the Internet Authentication Service (IAS) component of Windows Server 2003 R2 and earlier or the Network Policy Server (NPS) component of Windows Server 2008 and later.
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