hostapd - IEEE 802.11 AP, IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator

hostapd is a user space daemon for access point and authentication
servers.  It implements IEEE 802.11 access point management, IEEE
802.1X/WPA/WPA2/EAP Authenticators, RADIUS client, EAP server, and
RADIUS authentication server.  The current version supports Linux (Host
AP, madwifi, Prism54 drivers) and FreeBSD (net80211).