Static (map) NAT

Static (map) network address translation (NAT) provides a one-to-one mapping of private IP addresses to public IP addresses. It allows you to map an IP address on your internal network to an IP address that you want to make public.

Static NAT allows communication to be initiated from your internal network or an external network, like the Internet. It is especially useful if you have a server within your internal network that you want to allow public users to access. In this case, you need to create a NAT rule that maps the actual server address to a public address. The public address will become external information. This ensures that private information remains out of the hands of someone who might attack your systems.

The following list highlights the features of static NAT:

One-to-one mapping
External and internal network initiation
The address you associate or map to can be any address
The address you associate or map to becomes un-usable as an IP interface
Does not use port-mapped NAT

Attention: Use caution if you decide to map a personal computer to the well-known address of the iSeries™ server. The well-known address is the IP address reserved for most Internet and intranet traffic. If you do map to this IP address, NAT will translate all traffic and send it to the internal private address. Because this interface will be reserved for NAT, your iSeries server and the interface become unusable.