5.5 Given a scenario, install and configure a basic firewall.

5.5 Given a scenario, install and configure a basic firewall.
 * Types :
 * Software and hardware firewalls
 * Port security
 * Stateful inspection vs. packet filtering
 * Firewall rules :
 * Block/allow
 * Implicit deny
 * ACL
 * NAT/PAT
 * DMZ