You have implemented a WLAN that uses a dedicated server to determine which connecting clients are actually allowed to access the network. With this server, even when clients authenticate…

You have implemented a WLAN that uses a dedicated server to determine which connecting clients are actually allowed to access the network. With this server, even when clients authenticate successfully, they may be disallowed network access based on missing configuration settings, security software or other characteristics. What kind of server is in use that provides such capabilities?