Freeradius serves a multi protocol policy server (radiusd) which offers the possibility for a so called AAA functionality which means a centralized Authentication, Authorization, and Accounting management for users who connect and use a network service.
You can install Freeradius easily via Pakfire or via console with an
pakfire install freeradius
IPFire offers currently no administration webinterface for Freeradius so the configuration needs to be done manually or via SSH. All configuration files can be found under/etc/raddb/ .