Introduction

This FreeRADIUS version 4 documentation is available under the Creative Commons Non-Commercial license.

FreeRADIUS is a complex piece of software with many configuration options. In most circumstances, the default configuration works with minimal effort to install a server. For more complex requirements, FreeRADIUS can be difficult to setup because of more features and infinite configurations. The question for an administrator, then, is what piece of the configuration to change, and how to change it.

This updated documentation answers your basic and advanced questions about functionality, configuration, and other scenarios. The FreeRADIUS team included examples, developer information, and extra resources to assist you.

These documentation pages have had many updates from version 3. The Unlang policy language is fully documented. There is complete documentation for all configuration files, including all configuration items. However, there may still be some pages which still refer to the old v3 syntax and examples. We will be updating those over time, as we can.

The documentation is organized into main sections, sub-sections with smaller pages, and links to pertinent information. This hierarchy ensures that you can find information easily and extract the instructions you need. For example, all the Howto guides are a series of small steps to guide you through a task. The main sections by subject area and organized by task-based results as follows: