ZyXEL Communications HW-D Series User Manual

P-662H/HW-D Series User’s Guide

Chapter 8 DMZ

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The following figure shows a simple network setup with public IP addresses on the WAN and 
DMZ and private IP addresses on the LAN. Lower case letters represent public IP addresses 
(like a.b.c.d for example). The LAN port and connected computers (A through C) use private 
IP addresses that are in one subnet. The DMZ port and connected servers (D through F) use 
public IP addresses that are in another subnet. The public IP addresses of the DMZ and WAN 
ports are in separate subnets.

Allow between DMZ 

and LAN

Select this check box to forward NetBIOS packets from the LAN to the DMZ and 

from the DMZ to the LAN. If your firewall is enabled with the default policy set to 

block DMZ to LAN traffic, you also need to enable the default DMZ to LAN firewall 

rule that forwards NetBIOS traffic.Clear this check box to block all NetBIOS 

packets going from the LAN to the DMZ and from the DMZ to the LAN.

Allow between DMZ 

and WAN

Select this check box to forward NetBIOS packets from the WAN to the DMZ and 

from the DMZ to the WAN. Clear this check box to block all NetBIOS packets 

going from the WAN to the DMZ and from the DMZ to the WAN.

Apply

Click Apply to save your changes back to the ZyXEL Device.

Cancel

Click Cancel to begin configuring this screen afresh.

Table 51   DMZ (continued)