Alan DeKok

FreeRADIUS is an open source RADIUS server. The server scales easily from embedded systems with small amounts of memory to systems with millions of users. It is fast, flexible, configurable, and supports more authentication protocols than most commercial servers. It includes support for SQL ... [More] , LDAP, RADIUS Proxying, failover, load balancing, and nearly 100 vendor dictionary files. It can perform authentications via the PAP, CHAP, MS-CHAP, EAP-MD5, EAP-GTC, EAP-TLS, EAP-TTLS, PEAPv0, LEAP, EAP-SIM, and Digest authentication protocols. [Less]

FreeRADIUS Client is a framework and library for writing RADIUS Clients which additionally includes radlogin, a flexible RADIUS aware login replacement, a command line program to send RADIUS accounting records and a utility to query the status of a RADIUS server. All of these programs are based on a ... [More] library that lets you develop a RADIUS-aware application in less than 50 lines of C code. It is highly portable and runs on Linux, many BSD variants and Solaris. [Less]

This is the PAM to RADIUS authentication module. It allows any PAM-capable machine to become a RADIUS client for authentication and accounting requests. You will need a RADIUS server to perform the actual authentication.