摘要：A firewall is a system designed to prevent unwanted access from or into aninternal network. Firewall will act, like a locked door located between theinternal network with the external. Data must meet certain requirements in orderto pass through locked doors and will stop if the DMZ did not meet theserequirements is a mechanism to protect internal systems from attacks by hackersor other parties who wish to enter the system without having access rights. DMZwork on all basic network services that require access to the network "outsideworld" to other parts of the network. That way, the whole "open port" associatedwith the outside world will be on the network, so if a hacker to attack and docrack on DMZ servers that use the system, a hacker would only be able toaccess host only, not on the internal networ.
