Hi all, Im wondering if squid can do the following: I hav a dsl connection in my training centre. There are 3 classrooms. I would like 2 block out the internet connection & b able to turn it on for each classroom. I hav setup squid as per the linux tutorials & it works great but I cant see how Can I solve my problem. Class a has 20 machines running nt client 4.0 Class b has also 20 with NT 4.0 Class c has 15 & with NT 4.0 I was thinking something like a dhcp type leasing system where ips are pooled together. Any help would be great God Bless david