Authenticating through a RADIUS server is more involved than voucher authentication or authenticating through the user manager, as it requires installing and configuring a RADIUS server, but pfSense has streamlined much of the process, so it isn't as difficult as you might think. Configuring a captive portal in this case involves three major steps:
- Installing and configuring the RADIUS server
- Completing the prerequisites for setting up a captive portal
- Configuring the captive portal