Six Leading Linux RADIUS Servers

Networking expert Eric Geier provides an overview of Linux server software that covers all your Authentication, Authorization, and Accounting (AAA) needs.

Here we’ll take a look at six different open and free Remote Authentication Dial In User Service (RADIUS) servers available for Linux (and other platforms). You’ll find something that will work for you, whether you’re supporting dial-up or VPN users, offering 802.1X for Wi-Fi security, or running VoIP. All your Authentication, Authorization, and Accounting (AAA) needs can be met on a Linux server.

FreeRADIUS

The FreeRADIUS project was founded in June of 1999 by Miquel van Smoorenburg and Alan DeKok. Its freely available via the GNU General Public License, Version 2 (GPLv2) for running on Linux, other Unix-like systems, and even Windows. Since the first stable release in 2001 there have been feature improvements and bug fixes released every couple of months. There is extensive community support via documentation, a Wiki, mailing lists, and tutorials throughout the Internet. Commercial support is also available from consulting firms like Network RADIUS.

FreeRADIUS claims to be the world’s most popular RADIUS Server. They estimate their server is responsible for authenticating hundreds of millions of users daily across over 50,000 sites. They claim their server provides the AAA needs of many Fortune-500 companies and ISPs.

In addition to the actual RADIUS server, FreeRADIUS includes a BSD licensed client library, a PAM library, an Apache module, and other administrative tools. FreeRADIUS includes most features of other servers, plus supports EAP for 802.1X authentication for Wi-Fi security. Binary packages are downloadable for numerous platforms, and the source code is always available. Settings are defined text configuration files, which are well commented and documented.

Read the rest at Linux Planet.

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