If you want more control over which devices or endpoints access the network, PacketFence is for you. If you are looking at giving only Internet access to guests on your network, PacketFence is for you.
Network Access Control at an affordable price - FREE!! PacketFence is a fully supported, Free and Open Source network access control (NAC) system. PacketFence is actively maintained and has been deployed in numerous large-scale institutions over the past years. It can be used to effectively secure networks - from small to very large heterogeneous networks. PacketFence has been deployed in production environments where thousands of users are involved.