ZyXEL p-662h-61 Guia Do Utilizador

Prestige 662HW Series User’s Guide

Chapter 7 DMZ

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The DeMilitarized Zone (DMZ) auto-negotiating 10/100 Mbps Ethernet port provides a way 
for public servers (Web, e-mail, FTP, etc.) to be visible to the outside world (while still being 
protected from DoS (Denial of Service) attacks such as SYN flooding and Ping of Death). 
These public servers can also still be accessed from the secure LAN. 

By default the firewall allows traffic between the WAN and the DMZ, traffic from the DMZ to 
the LAN is denied, and traffic from the LAN to the DMZ is allowed. Internet users can have 
access to host servers on the DMZ but no access to the LAN, unless special filter rules 
allowing access were configured by the administrator or the user is an authorized remote user. 

It is highly recommended that you connect all of your public servers to the DMZ port. If you 
have more than one public server, connect a hub to the DMZ port. 

It is also highly recommended that you keep all sensitive information off of the public servers 
connected to the DMZ port. Store sensitive information on LAN computers.

You can assign public or private IP addresses to computers connected to the DMZ port. 

With public IP addresses, the WAN and DMZ ports must use public IP addresses that are on 
separate subnets. See the appendix for information on IP subnetting.

From the main menu, click DMZ. The screen appears as shown next.