In my office, I had to setup new BOX with the following:
BOX - Dell 990, I5 Prosesor, 4 Gb RAM, 500 GB Hard Disk, 2 NIC's
NIC1 - Connected with D-Link gigabit switch - 30 Users NIC2 - Connected with ADSL Modem/Router
OS - Windows Server 2008 R2 AD DS, DNS, DHCP
Users will get their IP, subnet, DNS, Default gateway from the server. Users will be using internet through this server.
How to achieve this?