Radius – server for remote user authentication and accounting

Last Updated on September 16, 2023

GNU Radius is a server for remote user authentication and accounting and a set of accompanying utilities.

Radius is useful in a wide variety of applications from dial-up user services to voice-over IP systems. It is designed to handle ISP workloads, and can be scaled for any network that needs a centralized authentication and/or accounting service for its workstations.

Radius’ built-in extension language, Rewrite, enables users to write special-case rules for parsing and restructuring non-standard terminal server packets.

Features include:

  • Supports a wide variety of authentication schemes:
    • User supplied authentication data via answering terminal server login/password prompts.
    • PAP or CHAP protocols.
    • System or internal database storage of user’s personal data.
    • SQL or PAM authentication.
  • Three built-in accounting schemes:
    • Unix accounting.
    • Plain text Detailed accounting.
    • SQL accounting.
  • Communicates with MySQL and PostgreSQL servers. Other DBMS are supported via ODBC interface.
  • Fully extensible with support for two extension languages: Rewrite and Scheme.
  • SNMP management.
  • Compatible with terminal servers.

Website: www.gnu.org/software/radius
Support: Manuals
Developer: Sergey Poznyakoff, Poul-Henning Kamp
License: GNU General Public License v3.0

Radius is written in C. Learn C with our recommended free books and free tutorials.

Return to Network Authentication Tools

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