Our school has recently installed Internet browsing facility for the students. We'll be glad if you could help us understand what it would require to implement a certain idea we're thinking of. We'll off course do it with an outside expert. But, since we're a low-budget school in an underdeveloped country, having an idea of what's required will help us find the right person. Here's what we want to do:

The server has DSL internet connection and it runs on Linux. It has LAN connection to 10 terminals which run on Windows. We want all students to have a user account through which they have to log in to start browsing. Every student will be able to browse for no more than 1 hour, after which they will be automatically logged off and they will not be able to log in again for that day. This 1 hour may be splitted (say 15 mins in the morning and the rest in the afternoon), but this is the maximum one can browse.

How de we do it? I just need a general overview of the process. Any help will be greatly appreciated.

Asif