I'm a first-timer with Cisco firewalls and need urgently help in configuration of Cisco 515E -firewall. The firewall is as a gatekeeper to a room where are three servers and about ten workstations. One of these three servers responds of all the network-traffic that comes in this particular space. So all the traffic goes through this server allthough all the computers are connected to same switch. The Firewall should come between the switch and the internet. How should I start configurating the firewall?