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RADIUS by Jonathan Hassell

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Chapter 10. Deployment Techniques

It’s the do-or-die moment: it’s time to deploy your AAA infrastructure. That infrastructure most likely takes the form of one or more RADIUS servers (otherwise you would probably not be reading this book). This chapter is designed to cover many of the inevitable questions that come up with regard to designing a plan to deploy RADIUS servers.

First, I’ll look at configuring the typical services that are offered by ISPs and corporations to their clients and then broaden that to cover extended services that support other business models. Next, I’ll discuss how to maintain the service by designing a secure, highly available network. Following that are two case studies of RADIUS implementation design. Finally, I’ll provide information about other RADIUS servers, available documentation, and other resources you can use to support your RADIUS operation.

Typical Services

As you’ve learned from the chapters on FreeRADIUS, the users that connect through your RADIUS server must be either configured into the users file for the RADIUS server itself or known by a remote system with which the initial RADIUS server can communicate. Anything else falls into the default connection configuration, which is sometimes known as the “catchall.” Most implementations have a generic configuration that is meant for most users and a few user-specific configurations sprinkled about. In the following sections, I will provide examples of both scenarios whenever appropriate.

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