Time for action – investigating the order of modules

This exercise requires you to take note of the order of modules listed in the various sections inside a virtual server.

1. Open the sites-enabled/default file under the FreeRADIUS configuration directory.
2. Read through it and take note of the order in which modules are used inside the various sections. Some of the comments will mention why a module is located at a certain place inside a section.

The following notes regarding the default file should make things clearer.

Access-Request

When an Access-Request packet comes in to the FreeRADIUS server it is first handled by the authorize section of the virtual server. It may then be handled by the authenticate and session sections and is finally passed to the post-auth section.

The first module listed in the authorize section is preprocess. It is first for a reason. Here's a general flow of the authorize section:

• The preprocess module does a sanity check and changes weird attributes to more...