Dell SonicWALL GX250 Manual page 104

To configure DMZ Addresses, complete the following instructions.
1. Enter the starting IP address of your valid IP address range in the From
Address field.
2. Enter the ending IP address of your valid IP address range in the To Address field.
Note: You may enter an individual IP address in the From Address field only.
3. Click Update. Once the SonicWALL has been updated, a message confirming the
update is displayed at the bottom of the browser window.
If you receive an error when you click Update, confirm that the DMZ Address Range
does not include the SonicWALL WAN IP Address, the WAN Gateway (Router) Address,
or any IP addresses assigned on the One-to-One NAT or Intranet windows.
Note: The SonicWALL supports up to 64 DMZ address ranges.
Delete a DMZ Address Range
To delete an address or range, select it in the Address Range list and click Delete.
Once the SonicWALL has been updated, a message confirming the update is displayed
at the bottom of the browser window.
Note: Network Address Translation (NAT) does not apply to servers on the DMZ.
One-to-One NAT
One-to-One NAT maps valid, external addresses to private addresses hidden by NAT.
Computers on your private LAN will be accessed on the Internet at the corresponding
public IP addresses.
You may create a relationship between internal and external addresses by defining
internal and external address ranges of equal length. Once the relationship is defined,
the computer with the first IP address of the private address range is accessible at the
first IP address of the external address range, the second computer at the second
external IP address, etc.
In the following example, a business has been assigned valid IP addresses ranging
from 209.19.28.16 to 209.19.28.31, with 209.19.28.16 assigned as the NAT Public
Address.
computers on the LAN. Typically, only computers that have been designated as Public
LAN Servers are accessible from the Internet. However, with One-to-One NAT,
Page 104 ADVANCED FEATURES
The address range of 192.168.168.2 to 192.168.168.255 is used by