We have 300 hosts in our LAN. They use a linux server as default gateway. We need to send all traffic through a server machine which would then forward it to internet.
I want to add a central login system, where all students need to login first to access internet. Unauthorized access will be redirected to a link. Process should be like this,
Student_Request-> Login -YES-> Internet
How can i implement this? i mean from where should i start? Is there any tools to control iptable kind of settings? And one thing, our server is running in linux.