Recently I’ve been doing a lot of small projects that involve RADIUS authentication on devices and have had to build multiple RADIUS auth servers for testing communication and integrating with 3rd party systems.
A very cool thing about being able to spin up a simple RADIUS server is you can create a basic server then hook it to your favorite authentication service and/or threat detection service. So, for example, let’s say you want to authenticate a user against a local repository or LDAP directory, then verify that the user is valid in your enterprise threat detection system, you can do that by simply adding in another validation step.
It also gives you the option to point servers at your custom application and send login requests to it and verify what your clients are sending, etc. This is great for debugging hardware that may not have the best internal logging. The options are really endless.