A firewall is used to control access to services (eg proxy) depending on the time of day, the day and the hosts the requests come from -- as the need may arise in a school or university. A web interface delegates control of activation to authorized users.
A simple web-based proxy script written in php. It allows you to bounce your signal off of your web server thereby allowing you to do things like bypass filters at work and school. Supports cookies.
If you want a feature, request it.