BenQ ESG-103 - Manual (Page 23)

Chapter 3 Configuration - 19
In the second table, you can assign a range of public IP addresses that will be
mapped to any private IP addresses in the first table.
Base Address - The first Public IP address that you wish to be mapped to.
Number of Address - The number of the public IP addresses which are
configured by users. If you have ten IP addresses
to be mapped to private IP addresses, you can put
10 in this box.
3.3.3.2 Static NAT
The ESG-103 provides static NAT function, which also acts as virtual DMZ.
It means that you can put your server in the LAN side and give it a mapped
public IP address. It looks like you provide your server accessed by anyone in
the Internet. (Please be carefully to use this feature.) You can also regard this
function as a one-to-one mapped NAT function. Please be careful that all
traffics that do not meet NAT requirement can be dealt with NAPT.
Local Address - Local host's IP address
Global Address - The public IP address will be mapped to a private IP
address. Please note that users cannot change the first
global address in the first entry because ESG-103 can
reuse the NAPT's WAN IP address to do the static
NAT conversion.