User`s manual

Industrial Secure Router User's Manual Network Address Translation
7-4
IP Address Select the Internal IP address in LAN/DMZ network area None
WAN IP (1-1 NAT type)
Setting Description Factory Default
IP Address Select the external IP address in WAN network area None
NOTE
The
Industrial Secure Router
can obtain an IP address via DHCP or PPPoE. However, if this dynamic IP address
is the same as the WAN IP for 1
-to-1 NAT, then the 1-to-1 NAT function will not work. For this reason, we
recommend disabling the DHCP/PPPoE function when using the 1
-to-1 NAT function.
N-to-1 NAT
If the user wants to hide the Internal IP address from users outside the LAN, the easiest way is to use the
N-to-1 (or N-1) NAT function. The N-1 NAT function replaces the source IP Address with an external IP address,
and adds a logical port number to identify the connection of this internal/external IP address. This function is
also called “Network Address Port Translation” (NAPT) or “IP Masquerading.”
The N-1 NAT function is a one-way connection from an internal secure area to an external non-secure area. The
user can initialize the connection from the internal to the external network, but may not be able to initialize the
connection from the external to the internal network.
Enable/Disable NAT Policy
Setting Description Factory Default
Enable or Disable Enable or disable the selected NAT policy Enabled
NAT Mode
Setting Description Factory Default
N-1
1-1
Port Forwarding
Select the NAT types N-1