Xblue Networks X-50 Installation Manual page 121

Advanced Programming
DeMilitarized Zone (DMZ)
The DMZ is a special location within a network, which was designed to add an extra layer of security. Basically,
information from the WAN (outside) is sent to a server with a firewall which evaluates the information if the
information is valid it is then sent to another server with another firewall for further evaluation. Although these two
servers are physically within a LAN, they are actually programmed to exist in front of the LAN to ensure no unwanted
packets are transmitted into the LAN.
However, the most common use for the "DMZ" is to systemically place a server or gateway directly onto the Internet
without requiring a class "A" or "B" address.
Placing a server or gateway may open the network to malicious network attacks.
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