Chapter 4. Authentication

This chapter zooms in on authentication. Authorization and accounting will follow later in the book.

Authentication is a process where we establish if someone is who he or she claims to be. The most common way is by a unique username and password.

In this chapter we shall:

  • Discuss PAP, CHAP, and MS-CHAP authentication protocols
  • See when and how authentication is done in FreeRADIUS
  • Explore ways to store passwords
  • Look at other authentication methods

So let's get on with it...

Authentication protocols

This section will give you background on three common authentication protocols. These protocols involve the supply of a username and password.

The radtest program uses the Password Authentication Protocol (PAP) by default when testing ...

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