Not IP aliasing and not IP masquerading but mapping??
Posted on 1997-07-13
As a result of switching internet service providers, I
need to change IP addresses. Rather than switching the IP
addresses on 140 or so machines, I would like to have my
Linux firewall (or perhaps my Ascend Max router) map my old
IP addresses to the new ones as packets go through the
This is not IP aliasing, giving one interface more
than one IP address. Nor is it masquerading, hiding
the internal network from the internet. I still want
the web, DNS, and mail servers to be accessible.