Summary

This chapter looked at authentication in FreeRADIUS. Specifically, we have covered:

  • Authentication protocols: There are three popular authentication protocols, namely, PAP, CHAP, and MS-CHAP. PAP is the least secure in certain situations but also the most versatile.
  • How FreeRADIUS handles Access-Requests: When an Access-Request reaches the FreeRADIUS server the authorize section defined in the virtual server determines which authentication method will be used. The value of Auth-Type indicates which authentication section will be used.
  • Password storing: Passwords do not need to be stored in clear text and it is better to store them in a hashed format. There are, however, limitations to the kind of authentication protocols that can be used ...

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