freeradius-server

The FreeRADIUS Server Project is a high performance and highly configurable multi-protocol policy server, supporting RADIUS, DHCPv4 and VMPS.
Using RADIUS allows authentication and authorization for a network to be centralized, and minimizes the number of changes that have to be done
when adding or deleting new users to a network.

For more information, please visit https://freeradius.org/