Recently, I am searching a software with Captive Portal Service. After surfing the web, I got the Zeroshell. Very surprising, it comes with tones of features that I want to implement on a network with better management. Like Lan2Lan VPN, Bandwidth Control and Balancing, QoS, Human readable logging... All are great. If you are facing plenty daily problem originated from Network management, take a look here. http://www.zeroshell.org/.