"PacketFence is a fully supported, trusted, Free and Open Source
network access control (NAC) solution. Boasting an impressive
feature set including a captive-portal for registration and
remediation, centralized wired and wireless management, powerful
guest management options, 802.1X support, layer-2 isolation of
problematic devices; PacketFence can be used to effectively secure
networks small to very large heterogeneous networks."